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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>
Heinrich Schuchardt9ad0a792018-11-18 17:58:51 +010010#include <mapmem.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040011#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040012#include <linux/ctype.h>
13#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040014#include <asm/global_data.h>
Masahiro Yamadab08c8c42018-03-05 01:20:11 +090015#include <linux/libfdt.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040016#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060017#include <exports.h>
Bin Menga0ae3802015-12-07 01:39:47 -080018#include <fdtdec.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040019
Kumar Gala3bed2aa2008-10-23 00:05:47 -050020/**
Alexander Graf94fb1822014-04-11 17:09:40 +020021 * fdt_getprop_u32_default_node - Return a node's property or a default
22 *
23 * @fdt: ptr to device tree
24 * @off: offset of node
25 * @cell: cell offset in property
26 * @prop: property name
27 * @dflt: default value if the property isn't found
28 *
29 * Convenience function to return a node's property or a default value if
30 * the property doesn't exist.
31 */
32u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
33 const char *prop, const u32 dflt)
34{
35 const fdt32_t *val;
36 int len;
37
38 val = fdt_getprop(fdt, off, prop, &len);
39
40 /* Check if property exists */
41 if (!val)
42 return dflt;
43
44 /* Check if property is long enough */
45 if (len < ((cell + 1) * sizeof(uint32_t)))
46 return dflt;
47
48 return fdt32_to_cpu(*val);
49}
50
51/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050052 * fdt_getprop_u32_default - Find a node and return it's property or a default
53 *
54 * @fdt: ptr to device tree
55 * @path: path of node
56 * @prop: property name
57 * @dflt: default value if the property isn't found
58 *
59 * Convenience function to find a node and return it's property or a
60 * default value if it doesn't exist.
61 */
Gabe Black07e12782011-11-08 01:09:44 -080062u32 fdt_getprop_u32_default(const void *fdt, const char *path,
63 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050064{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050065 int off;
66
67 off = fdt_path_offset(fdt, path);
68 if (off < 0)
69 return dflt;
70
Alexander Graf94fb1822014-04-11 17:09:40 +020071 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050072}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040073
Kumar Galaa3c29332007-10-24 10:21:57 -050074/**
75 * fdt_find_and_setprop: Find a node and set it's property
76 *
77 * @fdt: ptr to device tree
78 * @node: path of node
79 * @prop: property name
80 * @val: ptr to new value
81 * @len: length of new property value
82 * @create: flag to create the property if it doesn't exist
83 *
84 * Convenience function to directly set a property given the path to the node.
85 */
86int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
87 const void *val, int len, int create)
88{
Kumar Gala8d04f022007-10-24 11:04:22 -050089 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050090
91 if (nodeoff < 0)
92 return nodeoff;
93
Kim Phillips8aa5ec62013-01-16 14:00:11 +000094 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -050095 return 0; /* create flag not set; so exit quietly */
96
97 return fdt_setprop(fdt, nodeoff, prop, val, len);
98}
99
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900100/**
Simon Glassa9e8e292014-10-23 18:58:49 -0600101 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
102 *
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900103 * @fdt: pointer to the device tree blob
104 * @parentoffset: structure block offset of a node
105 * @name: name of the subnode to locate
106 *
107 * fdt_subnode_offset() finds a subnode of the node with a given name.
108 * If the subnode does not exist, it will be created.
109 */
Simon Glassa9e8e292014-10-23 18:58:49 -0600110int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900111{
112 int offset;
113
114 offset = fdt_subnode_offset(fdt, parentoffset, name);
115
116 if (offset == -FDT_ERR_NOTFOUND)
117 offset = fdt_add_subnode(fdt, parentoffset, name);
118
119 if (offset < 0)
120 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
121
122 return offset;
123}
124
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900125/* rename to CONFIG_OF_STDOUT_PATH ? */
126#if defined(OF_STDOUT_PATH)
127static int fdt_fixup_stdout(void *fdt, int chosenoff)
128{
129 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
130 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
131}
132#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Detlev Zundel40777812008-06-20 22:24:05 +0200133static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600134{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900135 int err;
136 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600137 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900138 const void *path;
139 int len;
140 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600141
Bin Meng9f29aeb2016-01-13 19:38:58 -0800142 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600143
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900144 aliasoff = fdt_path_offset(fdt, "/aliases");
145 if (aliasoff < 0) {
146 err = aliasoff;
Scott Woodda77c812015-09-01 22:48:08 -0500147 goto noalias;
Kumar Gala151c8b02007-11-26 17:06:15 -0600148 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900149
150 path = fdt_getprop(fdt, aliasoff, sername, &len);
151 if (!path) {
152 err = len;
Scott Woodda77c812015-09-01 22:48:08 -0500153 goto noalias;
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900154 }
155
156 /* fdt_setprop may break "path" so we copy it to tmp buffer */
157 memcpy(tmp, path, len);
158
159 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
Kumar Gala151c8b02007-11-26 17:06:15 -0600160 if (err < 0)
161 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900162 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600163
164 return err;
Scott Woodda77c812015-09-01 22:48:08 -0500165
166noalias:
167 printf("WARNING: %s: could not read %s alias: %s\n",
168 __func__, sername, fdt_strerror(err));
169
170 return 0;
Kumar Gala151c8b02007-11-26 17:06:15 -0600171}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900172#else
173static int fdt_fixup_stdout(void *fdt, int chosenoff)
174{
175 return 0;
176}
Kumar Gala151c8b02007-11-26 17:06:15 -0600177#endif
178
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900179static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
180 uint64_t val, int is_u64)
181{
182 if (is_u64)
183 return fdt_setprop_u64(fdt, nodeoffset, name, val);
184 else
185 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
186}
187
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200188int fdt_root(void *fdt)
189{
190 char *serial;
191 int err;
192
193 err = fdt_check_header(fdt);
194 if (err < 0) {
195 printf("fdt_root: %s\n", fdt_strerror(err));
196 return err;
197 }
198
Simon Glass00caae62017-08-03 12:22:12 -0600199 serial = env_get("serial#");
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200200 if (serial) {
201 err = fdt_setprop(fdt, 0, "serial-number", serial,
202 strlen(serial) + 1);
203
204 if (err < 0) {
205 printf("WARNING: could not set serial-number %s.\n",
206 fdt_strerror(err));
207 return err;
208 }
209 }
210
211 return 0;
212}
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900213
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900214int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500215{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900216 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500217 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900218 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500219 uint64_t addr, size;
220
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900221 /* just return if the size of initrd is zero */
222 if (initrd_start == initrd_end)
223 return 0;
224
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900225 /* find or create "/chosen" node. */
226 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
227 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500228 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500229
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500230 total = fdt_num_mem_rsv(fdt);
231
232 /*
233 * Look for an existing entry and update it. If we don't find
234 * the entry, we will j be the next available slot.
235 */
236 for (j = 0; j < total; j++) {
237 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
238 if (addr == initrd_start) {
239 fdt_del_mem_rsv(fdt, j);
240 break;
241 }
242 }
243
Grant Likelyce6b27a2011-03-28 09:58:55 +0000244 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500245 if (err < 0) {
246 printf("fdt_initrd: %s\n", fdt_strerror(err));
247 return err;
248 }
249
Simon Glass933cdbb2014-10-23 18:58:57 -0600250 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800251
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900252 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
253 (uint64_t)initrd_start, is_u64);
254
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900255 if (err < 0) {
256 printf("WARNING: could not set linux,initrd-start %s.\n",
257 fdt_strerror(err));
258 return err;
259 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900260
261 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
262 (uint64_t)initrd_end, is_u64);
263
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900264 if (err < 0) {
265 printf("WARNING: could not set linux,initrd-end %s.\n",
266 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500267
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900268 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500269 }
270
271 return 0;
272}
273
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900274int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400275{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400276 int nodeoffset;
277 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400278 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400279
280 err = fdt_check_header(fdt);
281 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400282 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400283 return err;
284 }
285
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900286 /* find or create "/chosen" node. */
287 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
288 if (nodeoffset < 0)
289 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400290
Simon Glass00caae62017-08-03 12:22:12 -0600291 str = env_get("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900292 if (str) {
293 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
294 strlen(str) + 1);
295 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900296 printf("WARNING: could not set bootargs %s.\n",
297 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900298 return err;
299 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400300 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500301
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900302 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400303}
304
Kumar Galae93becf2007-11-03 19:46:28 -0500305void do_fixup_by_path(void *fdt, const char *path, const char *prop,
306 const void *val, int len, int create)
307{
308#if defined(DEBUG)
309 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600310 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500311 for (i = 0; i < len; i++)
312 debug(" %.2x", *(u8*)(val+i));
313 debug("\n");
314#endif
315 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
316 if (rc)
317 printf("Unable to update property %s:%s, err=%s\n",
318 path, prop, fdt_strerror(rc));
319}
320
321void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
322 u32 val, int create)
323{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000324 fdt32_t tmp = cpu_to_fdt32(val);
325 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500326}
327
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600328void do_fixup_by_prop(void *fdt,
329 const char *pname, const void *pval, int plen,
330 const char *prop, const void *val, int len,
331 int create)
332{
333 int off;
334#if defined(DEBUG)
335 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600336 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600337 for (i = 0; i < len; i++)
338 debug(" %.2x", *(u8*)(val+i));
339 debug("\n");
340#endif
341 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
342 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000343 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600344 fdt_setprop(fdt, off, prop, val, len);
345 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
346 }
347}
348
349void do_fixup_by_prop_u32(void *fdt,
350 const char *pname, const void *pval, int plen,
351 const char *prop, u32 val, int create)
352{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000353 fdt32_t tmp = cpu_to_fdt32(val);
354 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600355}
356
357void do_fixup_by_compat(void *fdt, const char *compat,
358 const char *prop, const void *val, int len, int create)
359{
360 int off = -1;
361#if defined(DEBUG)
362 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600363 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600364 for (i = 0; i < len; i++)
365 debug(" %.2x", *(u8*)(val+i));
366 debug("\n");
367#endif
368 off = fdt_node_offset_by_compatible(fdt, -1, compat);
369 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000370 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600371 fdt_setprop(fdt, off, prop, val, len);
372 off = fdt_node_offset_by_compatible(fdt, off, compat);
373 }
374}
375
376void do_fixup_by_compat_u32(void *fdt, const char *compat,
377 const char *prop, u32 val, int create)
378{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000379 fdt32_t tmp = cpu_to_fdt32(val);
380 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600381}
382
Masahiro Yamada63c09412016-11-26 11:02:10 +0900383#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900384/*
385 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
386 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600387static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
388 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900389{
390 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100391 int address_cells = fdt_address_cells(fdt, 0);
392 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900393 char *p = buf;
394
395 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100396 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900397 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
398 else
399 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100400 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900401
Hans de Goedeffccb842014-11-28 14:23:51 +0100402 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900403 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
404 else
405 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100406 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900407 }
408
409 return p - (char *)buf;
410}
411
Ramon Fried6b6f2162018-08-14 00:35:42 +0300412#if CONFIG_NR_DRAM_BANKS > 4
413#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
414#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000415#define MEMORY_BANKS_MAX 4
Ramon Fried6b6f2162018-08-14 00:35:42 +0300416#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600417int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
418{
419 int err, nodeoffset;
Thierry Reding6d29cc72018-01-30 11:34:17 +0100420 int len, i;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000421 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600422
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000423 if (banks > MEMORY_BANKS_MAX) {
424 printf("%s: num banks %d exceeds hardcoded limit %d."
425 " Recompile with higher MEMORY_BANKS_MAX?\n",
426 __FUNCTION__, banks, MEMORY_BANKS_MAX);
427 return -1;
428 }
429
Kumar Gala3c927282007-11-26 14:57:45 -0600430 err = fdt_check_header(blob);
431 if (err < 0) {
432 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
433 return err;
434 }
435
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900436 /* find or create "/memory" node. */
437 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
438 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800439 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900440
Kumar Gala3c927282007-11-26 14:57:45 -0600441 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
442 sizeof("memory"));
443 if (err < 0) {
444 printf("WARNING: could not set %s %s.\n", "device_type",
445 fdt_strerror(err));
446 return err;
447 }
448
Thierry Redinged5af032018-02-15 19:05:59 +0100449 for (i = 0; i < banks; i++) {
450 if (start[i] == 0 && size[i] == 0)
451 break;
452 }
453
454 banks = i;
455
Andre Przywara5c1cf892015-06-21 00:29:54 +0100456 if (!banks)
457 return 0;
458
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900459 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600460
461 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
462 if (err < 0) {
463 printf("WARNING: could not set %s %s.\n",
464 "reg", fdt_strerror(err));
465 return err;
466 }
467 return 0;
468}
Masahiro Yamada63c09412016-11-26 11:02:10 +0900469#endif
Kumar Gala3c927282007-11-26 14:57:45 -0600470
John Rigbya6bd9e82010-10-13 13:57:33 -0600471int fdt_fixup_memory(void *blob, u64 start, u64 size)
472{
473 return fdt_fixup_memory_banks(blob, &start, &size, 1);
474}
475
Kumar Galaba37aa02008-08-19 15:41:18 -0500476void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600477{
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530478 int i = 0, j, prop;
Bin Mengbc393a72015-11-03 04:24:41 -0800479 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000480 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600481 const char *path;
oliver@schinagl.nla40db6d2016-11-25 16:30:19 +0100482 unsigned char mac_addr[ARP_HLEN];
Bin Mengbc393a72015-11-03 04:24:41 -0800483 int offset;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530484#ifdef FDT_SEQ_MACADDR_FROM_ENV
485 int nodeoff;
486 const struct fdt_property *fdt_prop;
487#endif
Kumar Galaab544632007-11-21 11:11:03 -0600488
Lev Iserovicha434fd12016-01-07 18:04:16 -0500489 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galaba37aa02008-08-19 15:41:18 -0500490 return;
491
Lev Iserovicha434fd12016-01-07 18:04:16 -0500492 /* Cycle through all aliases */
493 for (prop = 0; ; prop++) {
Bin Mengbc393a72015-11-03 04:24:41 -0800494 const char *name;
Bin Mengbc393a72015-11-03 04:24:41 -0800495
Lev Iserovicha434fd12016-01-07 18:04:16 -0500496 /* FDT might have been edited, recompute the offset */
497 offset = fdt_first_property_offset(fdt,
498 fdt_path_offset(fdt, "/aliases"));
499 /* Select property number 'prop' */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530500 for (j = 0; j < prop; j++)
Lev Iserovicha434fd12016-01-07 18:04:16 -0500501 offset = fdt_next_property_offset(fdt, offset);
502
503 if (offset < 0)
504 break;
505
Bin Mengbc393a72015-11-03 04:24:41 -0800506 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200507 if (!strncmp(name, "ethernet", 8)) {
508 /* Treat plain "ethernet" same as "ethernet0". */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530509 if (!strcmp(name, "ethernet")
510#ifdef FDT_SEQ_MACADDR_FROM_ENV
511 || !strcmp(name, "ethernet0")
512#endif
513 )
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200514 i = 0;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530515#ifndef FDT_SEQ_MACADDR_FROM_ENV
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200516 else
517 i = trailing_strtol(name);
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530518#endif
Bin Mengbc393a72015-11-03 04:24:41 -0800519 if (i != -1) {
520 if (i == 0)
521 strcpy(mac, "ethaddr");
522 else
523 sprintf(mac, "eth%daddr", i);
524 } else {
525 continue;
526 }
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530527#ifdef FDT_SEQ_MACADDR_FROM_ENV
528 nodeoff = fdt_path_offset(fdt, path);
529 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
530 NULL);
531 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
532 continue;
533 i++;
534#endif
Simon Glass00caae62017-08-03 12:22:12 -0600535 tmp = env_get(mac);
Bin Mengbc393a72015-11-03 04:24:41 -0800536 if (!tmp)
537 continue;
538
539 for (j = 0; j < 6; j++) {
540 mac_addr[j] = tmp ?
541 simple_strtoul(tmp, &end, 16) : 0;
542 if (tmp)
543 tmp = (*end) ? end + 1 : end;
544 }
545
546 do_fixup_by_path(fdt, path, "mac-address",
547 &mac_addr, 6, 0);
548 do_fixup_by_path(fdt, path, "local-mac-address",
549 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500550 }
Kumar Galaab544632007-11-21 11:11:03 -0600551 }
552}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300553
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100554int fdt_record_loadable(void *blob, u32 index, const char *name,
555 uintptr_t load_addr, u32 size, uintptr_t entry_point,
556 const char *type, const char *os)
557{
558 int err, node;
559
560 err = fdt_check_header(blob);
561 if (err < 0) {
562 printf("%s: %s\n", __func__, fdt_strerror(err));
563 return err;
564 }
565
566 /* find or create "/fit-images" node */
567 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
568 if (node < 0)
569 return node;
570
571 /* find or create "/fit-images/<name>" node */
572 node = fdt_find_or_add_subnode(blob, node, name);
573 if (node < 0)
574 return node;
575
576 /*
577 * We record these as 32bit entities, possibly truncating addresses.
578 * However, spl_fit.c is not 64bit safe either: i.e. we should not
579 * have an issue here.
580 */
581 fdt_setprop_u32(blob, node, "load-addr", load_addr);
582 if (entry_point != -1)
583 fdt_setprop_u32(blob, node, "entry-point", entry_point);
584 fdt_setprop_u32(blob, node, "size", size);
585 if (type)
586 fdt_setprop_string(blob, node, "type", type);
587 if (os)
588 fdt_setprop_string(blob, node, "os", os);
589
590 return node;
591}
592
Kumar Gala3082d232008-08-15 08:24:42 -0500593/* Resize the fdt to its actual size + a bit of padding */
Hannes Schmelzeref476832016-09-20 18:10:43 +0200594int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Gala3082d232008-08-15 08:24:42 -0500595{
596 int i;
597 uint64_t addr, size;
598 int total, ret;
599 uint actualsize;
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200600 int fdt_memrsv = 0;
Kumar Gala3082d232008-08-15 08:24:42 -0500601
602 if (!blob)
603 return 0;
604
605 total = fdt_num_mem_rsv(blob);
606 for (i = 0; i < total; i++) {
607 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000608 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500609 fdt_del_mem_rsv(blob, i);
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200610 fdt_memrsv = 1;
Kumar Gala3082d232008-08-15 08:24:42 -0500611 break;
612 }
613 }
614
Peter Korsgaardf242a082008-10-28 08:26:52 +0100615 /*
616 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200617 * plus the size needed for 5 fdt_add_mem_rsv, one
618 * for the fdt itself and 4 for a possible initrd
619 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100620 */
Kumar Gala3082d232008-08-15 08:24:42 -0500621 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200622 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500623
Hannes Schmelzeref476832016-09-20 18:10:43 +0200624 actualsize += extrasize;
Kumar Gala3082d232008-08-15 08:24:42 -0500625 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000626 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
627 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500628
629 /* Change the fdt header to reflect the correct size */
630 fdt_set_totalsize(blob, actualsize);
631
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200632 if (fdt_memrsv) {
633 /* Add the new reservation */
634 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
635 if (ret < 0)
636 return ret;
637 }
Kumar Gala3082d232008-08-15 08:24:42 -0500638
639 return actualsize;
640}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500641
642#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500643#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500644
645#define FDT_PCI_PREFETCH (0x40000000)
646#define FDT_PCI_MEM32 (0x02000000)
647#define FDT_PCI_IO (0x01000000)
648#define FDT_PCI_MEM64 (0x03000000)
649
650int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
651
652 int addrcell, sizecell, len, r;
653 u32 *dma_range;
654 /* sized based on pci addr cells, size-cells, & address-cells */
655 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
656
657 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
658 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
659
660 dma_range = &dma_ranges[0];
661 for (r = 0; r < hose->region_count; r++) {
662 u64 bus_start, phys_start, size;
663
Kumar Galaff4e66e2009-02-06 09:49:31 -0600664 /* skip if !PCI_REGION_SYS_MEMORY */
665 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500666 continue;
667
668 bus_start = (u64)hose->regions[r].bus_start;
669 phys_start = (u64)hose->regions[r].phys_start;
670 size = (u64)hose->regions[r].size;
671
672 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500673 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500674 dma_range[0] |= FDT_PCI_MEM64;
675 else
676 dma_range[0] |= FDT_PCI_MEM32;
677 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
678 dma_range[0] |= FDT_PCI_PREFETCH;
679#ifdef CONFIG_SYS_PCI_64BIT
680 dma_range[1] = bus_start >> 32;
681#else
682 dma_range[1] = 0;
683#endif
684 dma_range[2] = bus_start & 0xffffffff;
685
686 if (addrcell == 2) {
687 dma_range[3] = phys_start >> 32;
688 dma_range[4] = phys_start & 0xffffffff;
689 } else {
690 dma_range[3] = phys_start & 0xffffffff;
691 }
692
693 if (sizecell == 2) {
694 dma_range[3 + addrcell + 0] = size >> 32;
695 dma_range[3 + addrcell + 1] = size & 0xffffffff;
696 } else {
697 dma_range[3 + addrcell + 0] = size & 0xffffffff;
698 }
699
700 dma_range += (3 + addrcell + sizecell);
701 }
702
703 len = dma_range - &dma_ranges[0];
704 if (len)
705 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
706
707 return 0;
708}
709#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200710
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200711int fdt_increase_size(void *fdt, int add_len)
712{
713 int newlen;
714
715 newlen = fdt_totalsize(fdt) + add_len;
716
717 /* Open in place with a new len */
718 return fdt_open_into(fdt, fdt, newlen);
719}
720
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100721#ifdef CONFIG_FDT_FIXUP_PARTITIONS
722#include <jffs2/load_kernel.h>
723#include <mtd_node.h>
724
Michal Simekcd1457d2018-07-31 14:31:04 +0200725static int fdt_del_subnodes(const void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100726{
727 int off, ndepth;
728 int ret;
729
730 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
731 (off >= 0) && (ndepth > 0);
732 off = fdt_next_node(blob, off, &ndepth)) {
733 if (ndepth == 1) {
734 debug("delete %s: offset: %x\n",
735 fdt_get_name(blob, off, 0), off);
736 ret = fdt_del_node((void *)blob, off);
737 if (ret < 0) {
738 printf("Can't delete node: %s\n",
739 fdt_strerror(ret));
740 return ret;
741 } else {
742 ndepth = 0;
743 off = parent_offset;
744 }
745 }
746 }
747 return 0;
748}
749
Michal Simekcd1457d2018-07-31 14:31:04 +0200750static int fdt_del_partitions(void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100751{
752 const void *prop;
753 int ndepth = 0;
754 int off;
755 int ret;
756
757 off = fdt_next_node(blob, parent_offset, &ndepth);
758 if (off > 0 && ndepth == 1) {
759 prop = fdt_getprop(blob, off, "label", NULL);
760 if (prop == NULL) {
761 /*
762 * Could not find label property, nand {}; node?
763 * Check subnode, delete partitions there if any.
764 */
765 return fdt_del_partitions(blob, off);
766 } else {
767 ret = fdt_del_subnodes(blob, parent_offset);
768 if (ret < 0) {
769 printf("Can't remove subnodes: %s\n",
770 fdt_strerror(ret));
771 return ret;
772 }
773 }
774 }
775 return 0;
776}
777
778int fdt_node_set_part_info(void *blob, int parent_offset,
779 struct mtd_device *dev)
780{
781 struct list_head *pentry;
782 struct part_info *part;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100783 int off, ndepth = 0;
784 int part_num, ret;
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300785 int sizecell;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100786 char buf[64];
787
788 ret = fdt_del_partitions(blob, parent_offset);
789 if (ret < 0)
790 return ret;
791
792 /*
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300793 * Check if size/address is 1 or 2 cells.
794 * We assume #address-cells and #size-cells have same value.
795 */
796 sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
797 0, "#size-cells", 1);
798
799 /*
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100800 * Check if it is nand {}; subnode, adjust
801 * the offset in this case
802 */
803 off = fdt_next_node(blob, parent_offset, &ndepth);
804 if (off > 0 && ndepth == 1)
805 parent_offset = off;
806
807 part_num = 0;
808 list_for_each_prev(pentry, &dev->parts) {
809 int newoff;
810
811 part = list_entry(pentry, struct part_info, link);
812
Scott Wood06503f12013-10-15 17:41:27 -0500813 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100814 part_num, part->name, part->size,
815 part->offset, part->mask_flags);
816
Scott Wood06503f12013-10-15 17:41:27 -0500817 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100818add_sub:
819 ret = fdt_add_subnode(blob, parent_offset, buf);
820 if (ret == -FDT_ERR_NOSPACE) {
821 ret = fdt_increase_size(blob, 512);
822 if (!ret)
823 goto add_sub;
824 else
825 goto err_size;
826 } else if (ret < 0) {
827 printf("Can't add partition node: %s\n",
828 fdt_strerror(ret));
829 return ret;
830 }
831 newoff = ret;
832
833 /* Check MTD_WRITEABLE_CMD flag */
834 if (part->mask_flags & 1) {
835add_ro:
836 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
837 if (ret == -FDT_ERR_NOSPACE) {
838 ret = fdt_increase_size(blob, 512);
839 if (!ret)
840 goto add_ro;
841 else
842 goto err_size;
843 } else if (ret < 0)
844 goto err_prop;
845 }
846
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100847add_reg:
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300848 if (sizecell == 2) {
849 ret = fdt_setprop_u64(blob, newoff,
850 "reg", part->offset);
851 if (!ret)
852 ret = fdt_appendprop_u64(blob, newoff,
853 "reg", part->size);
854 } else {
855 ret = fdt_setprop_u32(blob, newoff,
856 "reg", part->offset);
857 if (!ret)
858 ret = fdt_appendprop_u32(blob, newoff,
859 "reg", part->size);
860 }
861
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100862 if (ret == -FDT_ERR_NOSPACE) {
863 ret = fdt_increase_size(blob, 512);
864 if (!ret)
865 goto add_reg;
866 else
867 goto err_size;
868 } else if (ret < 0)
869 goto err_prop;
870
871add_label:
872 ret = fdt_setprop_string(blob, newoff, "label", part->name);
873 if (ret == -FDT_ERR_NOSPACE) {
874 ret = fdt_increase_size(blob, 512);
875 if (!ret)
876 goto add_label;
877 else
878 goto err_size;
879 } else if (ret < 0)
880 goto err_prop;
881
882 part_num++;
883 }
884 return 0;
885err_size:
886 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
887 return ret;
888err_prop:
889 printf("Can't add property: %s\n", fdt_strerror(ret));
890 return ret;
891}
892
893/*
894 * Update partitions in nor/nand nodes using info from
895 * mtdparts environment variable. The nodes to update are
896 * specified by node_info structure which contains mtd device
897 * type and compatible string: E. g. the board code in
898 * ft_board_setup() could use:
899 *
900 * struct node_info nodes[] = {
901 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
902 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
903 * };
904 *
905 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
906 */
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900907void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
908 int node_info_size)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100909{
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100910 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100911 int i, idx;
912 int noff;
913
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100914 if (mtdparts_init() != 0)
915 return;
916
917 for (i = 0; i < node_info_size; i++) {
918 idx = 0;
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900919 noff = fdt_node_offset_by_compatible(blob, -1,
920 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100921 while (noff != -FDT_ERR_NOTFOUND) {
922 debug("%s: %s, mtd dev type %d\n",
923 fdt_get_name(blob, noff, 0),
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900924 node_info[i].compat, node_info[i].type);
925 dev = device_find(node_info[i].type, idx++);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100926 if (dev) {
927 if (fdt_node_set_part_info(blob, noff, dev))
928 return; /* return on error */
929 }
930
931 /* Jump to next flash node */
932 noff = fdt_node_offset_by_compatible(blob, noff,
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900933 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100934 }
935 }
936}
937#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500938
939void fdt_del_node_and_alias(void *blob, const char *alias)
940{
941 int off = fdt_path_offset(blob, alias);
942
943 if (off < 0)
944 return;
945
946 fdt_del_node(blob, off);
947
948 off = fdt_path_offset(blob, "/aliases");
949 fdt_delprop(blob, off, alias);
950}
Kumar Galaa0342c02010-06-16 14:27:38 -0500951
Kumar Galaa0342c02010-06-16 14:27:38 -0500952/* Max address size we deal with */
953#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800954#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100955#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
956 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500957
958/* Debug utility */
959#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000960static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500961{
962 printf("%s", s);
963 while(na--)
964 printf(" %08x", *(addr++));
965 printf("\n");
966}
967#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000968static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500969#endif
970
Paul Burton0a222d52016-05-17 07:43:24 +0100971/**
972 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +0100973 * @name: A string used to identify this bus in debug output.
974 * @addresses: The name of the DT property from which addresses are
975 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +0100976 * @match: Return non-zero if the node whose parent is at
977 * parentoffset in the FDT blob corresponds to a bus
978 * of this type, otherwise return zero. If NULL a match
979 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +0100980 * @count_cells:Count how many cells (be32 values) a node whose parent
981 * is at parentoffset in the FDT blob will require to
982 * represent its address (written to *addrc) & size
983 * (written to *sizec).
984 * @map: Map the address addr from the address space of this
985 * bus to that of its parent, making use of the ranges
986 * read from DT to an array at range. na and ns are the
987 * number of cells (be32 values) used to hold and address
988 * or size, respectively, for this bus. pna is the number
989 * of cells used to hold an address for the parent bus.
990 * Returns the address in the address space of the parent
991 * bus.
992 * @translate: Update the value of the address cells at addr within an
993 * FDT by adding offset to it. na specifies the number of
994 * cells used to hold the address being translated. Returns
995 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +0100996 *
997 * Each bus type will include a struct of_bus in the of_busses array,
998 * providing implementations of some or all of the functions used to
999 * match the bus & handle address translation for its children.
1000 */
Kumar Galaa0342c02010-06-16 14:27:38 -05001001struct of_bus {
1002 const char *name;
1003 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -06001004 int (*match)(const void *blob, int parentoffset);
1005 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001006 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001007 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001008 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001009 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001010};
1011
1012/* Default translator (generic bus) */
Simon Glasseed36602017-05-18 20:09:26 -06001013void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001014 int *addrc, int *sizec)
1015{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001016 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -05001017
Simon Glass933cdbb2014-10-23 18:58:57 -06001018 if (addrc)
1019 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -05001020
1021 if (sizec) {
1022 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1023 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001024 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -05001025 else
1026 *sizec = 1;
1027 }
Kumar Galaa0342c02010-06-16 14:27:38 -05001028}
1029
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001030static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001031 int na, int ns, int pna)
1032{
1033 u64 cp, s, da;
1034
Simon Glasseed36602017-05-18 20:09:26 -06001035 cp = fdt_read_number(range, na);
1036 s = fdt_read_number(range + na + pna, ns);
1037 da = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001038
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301039 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001040
1041 if (da < cp || da >= (cp + s))
1042 return OF_BAD_ADDR;
1043 return da - cp;
1044}
1045
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001046static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001047{
Simon Glasseed36602017-05-18 20:09:26 -06001048 u64 a = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001049 memset(addr, 0, na * 4);
1050 a += offset;
1051 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001052 addr[na - 2] = cpu_to_fdt32(a >> 32);
1053 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001054
1055 return 0;
1056}
1057
Paul Burton0a222d52016-05-17 07:43:24 +01001058#ifdef CONFIG_OF_ISA_BUS
1059
1060/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001061static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001062{
1063 const char *name;
1064
1065 name = fdt_get_name(blob, parentoffset, NULL);
1066 if (!name)
1067 return 0;
1068
1069 return !strcmp(name, "isa");
1070}
1071
Stephen Warren11e44fc2016-08-05 09:47:50 -06001072static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +01001073 int *addrc, int *sizec)
1074{
1075 if (addrc)
1076 *addrc = 2;
1077 if (sizec)
1078 *sizec = 1;
1079}
1080
1081static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1082 int na, int ns, int pna)
1083{
1084 u64 cp, s, da;
1085
1086 /* Check address type match */
1087 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1088 return OF_BAD_ADDR;
1089
Simon Glasseed36602017-05-18 20:09:26 -06001090 cp = fdt_read_number(range + 1, na - 1);
1091 s = fdt_read_number(range + na + pna, ns);
1092 da = fdt_read_number(addr + 1, na - 1);
Paul Burton0a222d52016-05-17 07:43:24 +01001093
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301094 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Paul Burton0a222d52016-05-17 07:43:24 +01001095
1096 if (da < cp || da >= (cp + s))
1097 return OF_BAD_ADDR;
1098 return da - cp;
1099}
1100
1101static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1102{
1103 return of_bus_default_translate(addr + 1, offset, na - 1);
1104}
1105
1106#endif /* CONFIG_OF_ISA_BUS */
1107
Kumar Galaa0342c02010-06-16 14:27:38 -05001108/* Array of bus specific translators */
1109static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001110#ifdef CONFIG_OF_ISA_BUS
1111 /* ISA */
1112 {
1113 .name = "isa",
1114 .addresses = "reg",
1115 .match = of_bus_isa_match,
1116 .count_cells = of_bus_isa_count_cells,
1117 .map = of_bus_isa_map,
1118 .translate = of_bus_isa_translate,
1119 },
1120#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001121 /* Default */
1122 {
1123 .name = "default",
1124 .addresses = "reg",
Simon Glasseed36602017-05-18 20:09:26 -06001125 .count_cells = fdt_support_default_count_cells,
Kumar Galaa0342c02010-06-16 14:27:38 -05001126 .map = of_bus_default_map,
1127 .translate = of_bus_default_translate,
1128 },
1129};
1130
Stephen Warren11e44fc2016-08-05 09:47:50 -06001131static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001132{
1133 struct of_bus *bus;
1134
1135 if (ARRAY_SIZE(of_busses) == 1)
1136 return of_busses;
1137
1138 for (bus = of_busses; bus; bus++) {
1139 if (!bus->match || bus->match(blob, parentoffset))
1140 return bus;
1141 }
1142
1143 /*
1144 * We should always have matched the default bus at least, since
1145 * it has a NULL match field. If we didn't then it somehow isn't
1146 * in the of_busses array or something equally catastrophic has
1147 * gone wrong.
1148 */
1149 assert(0);
1150 return NULL;
1151}
1152
Stephen Warren11e44fc2016-08-05 09:47:50 -06001153static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001154 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001155 int na, int ns, int pna, const char *rprop)
1156{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001157 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001158 int rlen;
1159 int rone;
1160 u64 offset = OF_BAD_ADDR;
1161
1162 /* Normally, an absence of a "ranges" property means we are
1163 * crossing a non-translatable boundary, and thus the addresses
1164 * below the current not cannot be converted to CPU physical ones.
1165 * Unfortunately, while this is very clear in the spec, it's not
1166 * what Apple understood, and they do have things like /uni-n or
1167 * /ht nodes with no "ranges" property and a lot of perfectly
1168 * useable mapped devices below them. Thus we treat the absence of
1169 * "ranges" as equivalent to an empty "ranges" property which means
1170 * a 1:1 translation at that level. It's up to the caller not to try
1171 * to translate addresses that aren't supposed to be translated in
1172 * the first place. --BenH.
1173 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001174 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001175 if (ranges == NULL || rlen == 0) {
Simon Glasseed36602017-05-18 20:09:26 -06001176 offset = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001177 memset(addr, 0, pna * 4);
1178 debug("OF: no ranges, 1:1 translation\n");
1179 goto finish;
1180 }
1181
1182 debug("OF: walking ranges...\n");
1183
1184 /* Now walk through the ranges */
1185 rlen /= 4;
1186 rone = na + pna + ns;
1187 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1188 offset = bus->map(addr, ranges, na, ns, pna);
1189 if (offset != OF_BAD_ADDR)
1190 break;
1191 }
1192 if (offset == OF_BAD_ADDR) {
1193 debug("OF: not found !\n");
1194 return 1;
1195 }
1196 memcpy(addr, ranges + na, 4 * pna);
1197
1198 finish:
1199 of_dump_addr("OF: parent translation for:", addr, pna);
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001200 debug("OF: with offset: %llu\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001201
1202 /* Translate it into parent bus space */
1203 return pbus->translate(addr, offset, pna);
1204}
1205
1206/*
1207 * Translate an address from the device-tree into a CPU physical address,
1208 * this walks up the tree and applies the various bus mappings on the
1209 * way.
1210 *
1211 * Note: We consider that crossing any level with #size-cells == 0 to mean
1212 * that translation is impossible (that is we are not dealing with a value
1213 * that can be mapped to a cpu physical address). This is not really specified
1214 * that way, but this is traditionally the way IBM at least do things
1215 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001216static u64 __of_translate_address(const void *blob, int node_offset,
1217 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001218{
1219 int parent;
1220 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001221 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001222 int na, ns, pna, pns;
1223 u64 result = OF_BAD_ADDR;
1224
1225 debug("OF: ** translation for device %s **\n",
1226 fdt_get_name(blob, node_offset, NULL));
1227
1228 /* Get parent & match bus type */
1229 parent = fdt_parent_offset(blob, node_offset);
1230 if (parent < 0)
1231 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001232 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001233
1234 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001235 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001236 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001237 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1238 fdt_get_name(blob, node_offset, NULL));
1239 goto bail;
1240 }
1241 memcpy(addr, in_addr, na * 4);
1242
1243 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1244 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1245 of_dump_addr("OF: translating address:", addr, na);
1246
1247 /* Translate */
1248 for (;;) {
1249 /* Switch to parent bus */
1250 node_offset = parent;
1251 parent = fdt_parent_offset(blob, node_offset);
1252
1253 /* If root, we have finished */
1254 if (parent < 0) {
1255 debug("OF: reached root node\n");
Simon Glasseed36602017-05-18 20:09:26 -06001256 result = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001257 break;
1258 }
1259
1260 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001261 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001262 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001263 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001264 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1265 fdt_get_name(blob, node_offset, NULL));
1266 break;
1267 }
1268
1269 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1270 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1271
1272 /* Apply bus translation */
1273 if (of_translate_one(blob, node_offset, bus, pbus,
1274 addr, na, ns, pna, rprop))
1275 break;
1276
1277 /* Complete the move up one level */
1278 na = pna;
1279 ns = pns;
1280 bus = pbus;
1281
1282 of_dump_addr("OF: one level translation:", addr, na);
1283 }
1284 bail:
1285
1286 return result;
1287}
1288
Stephen Warren11e44fc2016-08-05 09:47:50 -06001289u64 fdt_translate_address(const void *blob, int node_offset,
1290 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001291{
1292 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1293}
Kumar Gala75e73af2010-07-04 12:48:21 -05001294
1295/**
1296 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1297 * who's reg property matches a physical cpu address
1298 *
1299 * @blob: ptr to device tree
1300 * @compat: compatiable string to match
1301 * @compat_off: property name
1302 *
1303 */
1304int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1305 phys_addr_t compat_off)
1306{
1307 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1308 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001309 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001310 if (reg) {
1311 if (compat_off == fdt_translate_address(blob, off, reg))
1312 return off;
1313 }
1314 off = fdt_node_offset_by_compatible(blob, off, compat);
1315 }
1316
1317 return -FDT_ERR_NOTFOUND;
1318}
1319
Kumar Galab4b847e2010-07-09 16:18:58 -05001320/**
1321 * fdt_alloc_phandle: Return next free phandle value
1322 *
1323 * @blob: ptr to device tree
1324 */
1325int fdt_alloc_phandle(void *blob)
1326{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001327 int offset;
1328 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001329
Kumar Galab4b847e2010-07-09 16:18:58 -05001330 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1331 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001332 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001333 }
1334
1335 return phandle + 1;
1336}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001337
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001338/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001339 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001340 *
1341 * @fdt: ptr to device tree
1342 * @nodeoffset: node to update
1343 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001344 */
1345int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001346{
1347 int ret;
1348
1349#ifdef DEBUG
1350 int off = fdt_node_offset_by_phandle(fdt, phandle);
1351
1352 if ((off >= 0) && (off != nodeoffset)) {
1353 char buf[64];
1354
1355 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1356 printf("Trying to update node %s with phandle %u ",
1357 buf, phandle);
1358
1359 fdt_get_path(fdt, off, buf, sizeof(buf));
1360 printf("that already exists in node %s.\n", buf);
1361 return -FDT_ERR_BADPHANDLE;
1362 }
1363#endif
1364
1365 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1366 if (ret < 0)
1367 return ret;
1368
1369 /*
1370 * For now, also set the deprecated "linux,phandle" property, so that we
1371 * don't break older kernels.
1372 */
1373 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1374
1375 return ret;
1376}
1377
Kumar Gala10aeabd2011-08-01 00:25:20 -05001378/*
1379 * fdt_create_phandle: Create a phandle property for the given node
1380 *
1381 * @fdt: ptr to device tree
1382 * @nodeoffset: node to update
1383 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001384unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001385{
1386 /* see if there is a phandle already */
1387 int phandle = fdt_get_phandle(fdt, nodeoffset);
1388
1389 /* if we got 0, means no phandle so create one */
1390 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001391 int ret;
1392
Kumar Gala10aeabd2011-08-01 00:25:20 -05001393 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001394 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1395 if (ret < 0) {
1396 printf("Can't set phandle %u: %s\n", phandle,
1397 fdt_strerror(ret));
1398 return 0;
1399 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001400 }
1401
1402 return phandle;
1403}
1404
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001405/*
1406 * fdt_set_node_status: Set status for the given node
1407 *
1408 * @fdt: ptr to device tree
1409 * @nodeoffset: node to update
1410 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1411 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1412 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1413 */
1414int fdt_set_node_status(void *fdt, int nodeoffset,
1415 enum fdt_status status, unsigned int error_code)
1416{
1417 char buf[16];
1418 int ret = 0;
1419
1420 if (nodeoffset < 0)
1421 return nodeoffset;
1422
1423 switch (status) {
1424 case FDT_STATUS_OKAY:
1425 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1426 break;
1427 case FDT_STATUS_DISABLED:
1428 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1429 break;
1430 case FDT_STATUS_FAIL:
1431 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1432 break;
1433 case FDT_STATUS_FAIL_ERROR_CODE:
1434 sprintf(buf, "fail-%d", error_code);
1435 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1436 break;
1437 default:
1438 printf("Invalid fdt status: %x\n", status);
1439 ret = -1;
1440 break;
1441 }
1442
1443 return ret;
1444}
1445
1446/*
1447 * fdt_set_status_by_alias: Set status for the given node given an alias
1448 *
1449 * @fdt: ptr to device tree
1450 * @alias: alias of node to update
1451 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1452 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1453 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1454 */
1455int fdt_set_status_by_alias(void *fdt, const char* alias,
1456 enum fdt_status status, unsigned int error_code)
1457{
1458 int offset = fdt_path_offset(fdt, alias);
1459
1460 return fdt_set_node_status(fdt, offset, status, error_code);
1461}
1462
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001463#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001464int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1465{
1466 int noff;
1467 int ret;
1468
1469 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1470 if (noff != -FDT_ERR_NOTFOUND) {
1471 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1472add_edid:
1473 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1474 if (ret == -FDT_ERR_NOSPACE) {
1475 ret = fdt_increase_size(blob, 512);
1476 if (!ret)
1477 goto add_edid;
1478 else
1479 goto err_size;
1480 } else if (ret < 0) {
1481 printf("Can't add property: %s\n", fdt_strerror(ret));
1482 return ret;
1483 }
1484 }
1485 return 0;
1486err_size:
1487 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1488 return ret;
1489}
1490#endif
Timur Tabibb682002011-05-03 13:24:07 -05001491
1492/*
1493 * Verify the physical address of device tree node for a given alias
1494 *
1495 * This function locates the device tree node of a given alias, and then
1496 * verifies that the physical address of that device matches the given
1497 * parameter. It displays a message if there is a mismatch.
1498 *
1499 * Returns 1 on success, 0 on failure
1500 */
1501int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1502{
1503 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001504 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001505 int node, len;
1506 u64 dt_addr;
1507
1508 path = fdt_getprop(fdt, anode, alias, NULL);
1509 if (!path) {
1510 /* If there's no such alias, then it's not a failure */
1511 return 1;
1512 }
1513
1514 node = fdt_path_offset(fdt, path);
1515 if (node < 0) {
1516 printf("Warning: device tree alias '%s' points to invalid "
1517 "node %s.\n", alias, path);
1518 return 0;
1519 }
1520
1521 reg = fdt_getprop(fdt, node, "reg", &len);
1522 if (!reg) {
1523 printf("Warning: device tree node '%s' has no address.\n",
1524 path);
1525 return 0;
1526 }
1527
1528 dt_addr = fdt_translate_address(fdt, node, reg);
1529 if (addr != dt_addr) {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001530 printf("Warning: U-Boot configured device %s at address %llu,\n"
1531 "but the device tree has it address %llx.\n",
1532 alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001533 return 0;
1534 }
1535
1536 return 1;
1537}
1538
1539/*
1540 * Returns the base address of an SOC or PCI node
1541 */
Simon Glassec002112017-05-18 20:09:00 -06001542u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001543{
1544 int size;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001545 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001546
Simon Glass336a4482017-07-04 13:31:20 -06001547 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabibb682002011-05-03 13:24:07 -05001548
Simon Glass336a4482017-07-04 13:31:20 -06001549 return prop ? fdt_translate_address(fdt, node, prop) : 0;
Timur Tabibb682002011-05-03 13:24:07 -05001550}
Alexander Grafc48e6862014-04-11 17:09:41 +02001551
1552/*
1553 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1554 */
1555static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1556 uint64_t *val, int cells)
1557{
1558 const fdt32_t *prop32 = &prop[cell_off];
1559 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1560
1561 if ((cell_off + cells) > prop_len)
1562 return -FDT_ERR_NOSPACE;
1563
1564 switch (cells) {
1565 case 1:
1566 *val = fdt32_to_cpu(*prop32);
1567 break;
1568 case 2:
1569 *val = fdt64_to_cpu(*prop64);
1570 break;
1571 default:
1572 return -FDT_ERR_NOSPACE;
1573 }
1574
1575 return 0;
1576}
1577
1578/**
1579 * fdt_read_range - Read a node's n'th range property
1580 *
1581 * @fdt: ptr to device tree
1582 * @node: offset of node
1583 * @n: range index
1584 * @child_addr: pointer to storage for the "child address" field
1585 * @addr: pointer to storage for the CPU view translated physical start
1586 * @len: pointer to storage for the range length
1587 *
1588 * Convenience function that reads and interprets a specific range out of
1589 * a number of the "ranges" property array.
1590 */
1591int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1592 uint64_t *addr, uint64_t *len)
1593{
1594 int pnode = fdt_parent_offset(fdt, node);
1595 const fdt32_t *ranges;
1596 int pacells;
1597 int acells;
1598 int scells;
1599 int ranges_len;
1600 int cell = 0;
1601 int r = 0;
1602
1603 /*
1604 * The "ranges" property is an array of
1605 * { <child address> <parent address> <size in child address space> }
1606 *
1607 * All 3 elements can span a diffent number of cells. Fetch their size.
1608 */
1609 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1610 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1611 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1612
1613 /* Now try to get the ranges property */
1614 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1615 if (!ranges)
1616 return -FDT_ERR_NOTFOUND;
1617 ranges_len /= sizeof(uint32_t);
1618
1619 /* Jump to the n'th entry */
1620 cell = n * (pacells + acells + scells);
1621
1622 /* Read <child address> */
1623 if (child_addr) {
1624 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1625 acells);
1626 if (r)
1627 return r;
1628 }
1629 cell += acells;
1630
1631 /* Read <parent address> */
1632 if (addr)
1633 *addr = fdt_translate_address(fdt, node, ranges + cell);
1634 cell += pacells;
1635
1636 /* Read <size in child address space> */
1637 if (len) {
1638 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1639 if (r)
1640 return r;
1641 }
1642
1643 return 0;
1644}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001645
1646/**
1647 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1648 *
1649 * @fdt: ptr to device tree
1650 * @node: offset of the simplefb node
1651 * @base_address: framebuffer base address
1652 * @width: width in pixels
1653 * @height: height in pixels
1654 * @stride: bytes per line
1655 * @format: pixel format string
1656 *
1657 * Convenience function to fill and enable a simplefb node.
1658 */
1659int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1660 u32 height, u32 stride, const char *format)
1661{
1662 char name[32];
1663 fdt32_t cells[4];
1664 int i, addrc, sizec, ret;
1665
Simon Glasseed36602017-05-18 20:09:26 -06001666 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1667 &addrc, &sizec);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001668 i = 0;
1669 if (addrc == 2)
1670 cells[i++] = cpu_to_fdt32(base_address >> 32);
1671 cells[i++] = cpu_to_fdt32(base_address);
1672 if (sizec == 2)
1673 cells[i++] = 0;
1674 cells[i++] = cpu_to_fdt32(height * stride);
1675
1676 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1677 if (ret < 0)
1678 return ret;
1679
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001680 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001681 ret = fdt_set_name(fdt, node, name);
1682 if (ret < 0)
1683 return ret;
1684
1685 ret = fdt_setprop_u32(fdt, node, "width", width);
1686 if (ret < 0)
1687 return ret;
1688
1689 ret = fdt_setprop_u32(fdt, node, "height", height);
1690 if (ret < 0)
1691 return ret;
1692
1693 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1694 if (ret < 0)
1695 return ret;
1696
1697 ret = fdt_setprop_string(fdt, node, "format", format);
1698 if (ret < 0)
1699 return ret;
1700
1701 ret = fdt_setprop_string(fdt, node, "status", "okay");
1702 if (ret < 0)
1703 return ret;
1704
1705 return 0;
1706}
Tim Harvey08daa252015-04-08 11:45:39 -07001707
1708/*
1709 * Update native-mode in display-timings from display environment variable.
1710 * The node to update are specified by path.
1711 */
1712int fdt_fixup_display(void *blob, const char *path, const char *display)
1713{
1714 int off, toff;
1715
1716 if (!display || !path)
1717 return -FDT_ERR_NOTFOUND;
1718
1719 toff = fdt_path_offset(blob, path);
1720 if (toff >= 0)
1721 toff = fdt_subnode_offset(blob, toff, "display-timings");
1722 if (toff < 0)
1723 return toff;
1724
1725 for (off = fdt_first_subnode(blob, toff);
1726 off >= 0;
1727 off = fdt_next_subnode(blob, off)) {
1728 uint32_t h = fdt_get_phandle(blob, off);
1729 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1730 fdt32_to_cpu(h));
1731 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1732 return fdt_setprop_u32(blob, toff, "native-mode", h);
1733 }
1734 return toff;
1735}
Pantelis Antonioufc7c3182017-09-04 23:12:11 +03001736
1737#ifdef CONFIG_OF_LIBFDT_OVERLAY
1738/**
1739 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1740 *
1741 * @fdt: ptr to device tree
1742 * @fdto: ptr to device tree overlay
1743 *
1744 * Convenience function to apply an overlay and display helpful messages
1745 * in the case of an error
1746 */
1747int fdt_overlay_apply_verbose(void *fdt, void *fdto)
1748{
1749 int err;
1750 bool has_symbols;
1751
1752 err = fdt_path_offset(fdt, "/__symbols__");
1753 has_symbols = err >= 0;
1754
1755 err = fdt_overlay_apply(fdt, fdto);
1756 if (err < 0) {
1757 printf("failed on fdt_overlay_apply(): %s\n",
1758 fdt_strerror(err));
1759 if (!has_symbols) {
1760 printf("base fdt does did not have a /__symbols__ node\n");
1761 printf("make sure you've compiled with -@\n");
1762 }
1763 }
1764 return err;
1765}
1766#endif