blob: 3440e42a257b203d8e8f3255206c39eaf63118e5 [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>
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
Thierry Reding6d29cc72018-01-30 11:34:17 +0100459 for (i = 0; i < banks; i++)
460 if (start[i] == 0 && size[i] == 0)
461 break;
462
463 banks = i;
464
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900465 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600466
467 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
468 if (err < 0) {
469 printf("WARNING: could not set %s %s.\n",
470 "reg", fdt_strerror(err));
471 return err;
472 }
473 return 0;
474}
Masahiro Yamada63c09412016-11-26 11:02:10 +0900475#endif
Kumar Gala3c927282007-11-26 14:57:45 -0600476
John Rigbya6bd9e82010-10-13 13:57:33 -0600477int fdt_fixup_memory(void *blob, u64 start, u64 size)
478{
479 return fdt_fixup_memory_banks(blob, &start, &size, 1);
480}
481
Kumar Galaba37aa02008-08-19 15:41:18 -0500482void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600483{
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530484 int i = 0, j, prop;
Bin Mengbc393a72015-11-03 04:24:41 -0800485 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000486 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600487 const char *path;
oliver@schinagl.nla40db6d2016-11-25 16:30:19 +0100488 unsigned char mac_addr[ARP_HLEN];
Bin Mengbc393a72015-11-03 04:24:41 -0800489 int offset;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530490#ifdef FDT_SEQ_MACADDR_FROM_ENV
491 int nodeoff;
492 const struct fdt_property *fdt_prop;
493#endif
Kumar Galaab544632007-11-21 11:11:03 -0600494
Lev Iserovicha434fd12016-01-07 18:04:16 -0500495 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galaba37aa02008-08-19 15:41:18 -0500496 return;
497
Lev Iserovicha434fd12016-01-07 18:04:16 -0500498 /* Cycle through all aliases */
499 for (prop = 0; ; prop++) {
Bin Mengbc393a72015-11-03 04:24:41 -0800500 const char *name;
Bin Mengbc393a72015-11-03 04:24:41 -0800501
Lev Iserovicha434fd12016-01-07 18:04:16 -0500502 /* FDT might have been edited, recompute the offset */
503 offset = fdt_first_property_offset(fdt,
504 fdt_path_offset(fdt, "/aliases"));
505 /* Select property number 'prop' */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530506 for (j = 0; j < prop; j++)
Lev Iserovicha434fd12016-01-07 18:04:16 -0500507 offset = fdt_next_property_offset(fdt, offset);
508
509 if (offset < 0)
510 break;
511
Bin Mengbc393a72015-11-03 04:24:41 -0800512 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200513 if (!strncmp(name, "ethernet", 8)) {
514 /* Treat plain "ethernet" same as "ethernet0". */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530515 if (!strcmp(name, "ethernet")
516#ifdef FDT_SEQ_MACADDR_FROM_ENV
517 || !strcmp(name, "ethernet0")
518#endif
519 )
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200520 i = 0;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530521#ifndef FDT_SEQ_MACADDR_FROM_ENV
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200522 else
523 i = trailing_strtol(name);
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530524#endif
Bin Mengbc393a72015-11-03 04:24:41 -0800525 if (i != -1) {
526 if (i == 0)
527 strcpy(mac, "ethaddr");
528 else
529 sprintf(mac, "eth%daddr", i);
530 } else {
531 continue;
532 }
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530533#ifdef FDT_SEQ_MACADDR_FROM_ENV
534 nodeoff = fdt_path_offset(fdt, path);
535 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
536 NULL);
537 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
538 continue;
539 i++;
540#endif
Simon Glass00caae62017-08-03 12:22:12 -0600541 tmp = env_get(mac);
Bin Mengbc393a72015-11-03 04:24:41 -0800542 if (!tmp)
543 continue;
544
545 for (j = 0; j < 6; j++) {
546 mac_addr[j] = tmp ?
547 simple_strtoul(tmp, &end, 16) : 0;
548 if (tmp)
549 tmp = (*end) ? end + 1 : end;
550 }
551
552 do_fixup_by_path(fdt, path, "mac-address",
553 &mac_addr, 6, 0);
554 do_fixup_by_path(fdt, path, "local-mac-address",
555 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500556 }
Kumar Galaab544632007-11-21 11:11:03 -0600557 }
558}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300559
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100560int fdt_record_loadable(void *blob, u32 index, const char *name,
561 uintptr_t load_addr, u32 size, uintptr_t entry_point,
562 const char *type, const char *os)
563{
564 int err, node;
565
566 err = fdt_check_header(blob);
567 if (err < 0) {
568 printf("%s: %s\n", __func__, fdt_strerror(err));
569 return err;
570 }
571
572 /* find or create "/fit-images" node */
573 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
574 if (node < 0)
575 return node;
576
577 /* find or create "/fit-images/<name>" node */
578 node = fdt_find_or_add_subnode(blob, node, name);
579 if (node < 0)
580 return node;
581
582 /*
583 * We record these as 32bit entities, possibly truncating addresses.
584 * However, spl_fit.c is not 64bit safe either: i.e. we should not
585 * have an issue here.
586 */
587 fdt_setprop_u32(blob, node, "load-addr", load_addr);
588 if (entry_point != -1)
589 fdt_setprop_u32(blob, node, "entry-point", entry_point);
590 fdt_setprop_u32(blob, node, "size", size);
591 if (type)
592 fdt_setprop_string(blob, node, "type", type);
593 if (os)
594 fdt_setprop_string(blob, node, "os", os);
595
596 return node;
597}
598
Kumar Gala3082d232008-08-15 08:24:42 -0500599/* Resize the fdt to its actual size + a bit of padding */
Hannes Schmelzeref476832016-09-20 18:10:43 +0200600int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Gala3082d232008-08-15 08:24:42 -0500601{
602 int i;
603 uint64_t addr, size;
604 int total, ret;
605 uint actualsize;
606
607 if (!blob)
608 return 0;
609
610 total = fdt_num_mem_rsv(blob);
611 for (i = 0; i < total; i++) {
612 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000613 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500614 fdt_del_mem_rsv(blob, i);
615 break;
616 }
617 }
618
Peter Korsgaardf242a082008-10-28 08:26:52 +0100619 /*
620 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200621 * plus the size needed for 5 fdt_add_mem_rsv, one
622 * for the fdt itself and 4 for a possible initrd
623 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100624 */
Kumar Gala3082d232008-08-15 08:24:42 -0500625 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200626 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500627
Hannes Schmelzeref476832016-09-20 18:10:43 +0200628 actualsize += extrasize;
Kumar Gala3082d232008-08-15 08:24:42 -0500629 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000630 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
631 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500632
633 /* Change the fdt header to reflect the correct size */
634 fdt_set_totalsize(blob, actualsize);
635
636 /* Add the new reservation */
Heinrich Schuchardt9ad0a792018-11-18 17:58:51 +0100637 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500638 if (ret < 0)
639 return ret;
640
641 return actualsize;
642}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500643
644#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500645#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500646
647#define FDT_PCI_PREFETCH (0x40000000)
648#define FDT_PCI_MEM32 (0x02000000)
649#define FDT_PCI_IO (0x01000000)
650#define FDT_PCI_MEM64 (0x03000000)
651
652int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
653
654 int addrcell, sizecell, len, r;
655 u32 *dma_range;
656 /* sized based on pci addr cells, size-cells, & address-cells */
657 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
658
659 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
660 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
661
662 dma_range = &dma_ranges[0];
663 for (r = 0; r < hose->region_count; r++) {
664 u64 bus_start, phys_start, size;
665
Kumar Galaff4e66e2009-02-06 09:49:31 -0600666 /* skip if !PCI_REGION_SYS_MEMORY */
667 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500668 continue;
669
670 bus_start = (u64)hose->regions[r].bus_start;
671 phys_start = (u64)hose->regions[r].phys_start;
672 size = (u64)hose->regions[r].size;
673
674 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500675 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500676 dma_range[0] |= FDT_PCI_MEM64;
677 else
678 dma_range[0] |= FDT_PCI_MEM32;
679 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
680 dma_range[0] |= FDT_PCI_PREFETCH;
681#ifdef CONFIG_SYS_PCI_64BIT
682 dma_range[1] = bus_start >> 32;
683#else
684 dma_range[1] = 0;
685#endif
686 dma_range[2] = bus_start & 0xffffffff;
687
688 if (addrcell == 2) {
689 dma_range[3] = phys_start >> 32;
690 dma_range[4] = phys_start & 0xffffffff;
691 } else {
692 dma_range[3] = phys_start & 0xffffffff;
693 }
694
695 if (sizecell == 2) {
696 dma_range[3 + addrcell + 0] = size >> 32;
697 dma_range[3 + addrcell + 1] = size & 0xffffffff;
698 } else {
699 dma_range[3 + addrcell + 0] = size & 0xffffffff;
700 }
701
702 dma_range += (3 + addrcell + sizecell);
703 }
704
705 len = dma_range - &dma_ranges[0];
706 if (len)
707 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
708
709 return 0;
710}
711#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200712
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200713int fdt_increase_size(void *fdt, int add_len)
714{
715 int newlen;
716
717 newlen = fdt_totalsize(fdt) + add_len;
718
719 /* Open in place with a new len */
720 return fdt_open_into(fdt, fdt, newlen);
721}
722
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100723#ifdef CONFIG_FDT_FIXUP_PARTITIONS
724#include <jffs2/load_kernel.h>
725#include <mtd_node.h>
726
727struct reg_cell {
728 unsigned int r0;
729 unsigned int r1;
730};
731
Michal Simekcd1457d2018-07-31 14:31:04 +0200732static int fdt_del_subnodes(const void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100733{
734 int off, ndepth;
735 int ret;
736
737 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
738 (off >= 0) && (ndepth > 0);
739 off = fdt_next_node(blob, off, &ndepth)) {
740 if (ndepth == 1) {
741 debug("delete %s: offset: %x\n",
742 fdt_get_name(blob, off, 0), off);
743 ret = fdt_del_node((void *)blob, off);
744 if (ret < 0) {
745 printf("Can't delete node: %s\n",
746 fdt_strerror(ret));
747 return ret;
748 } else {
749 ndepth = 0;
750 off = parent_offset;
751 }
752 }
753 }
754 return 0;
755}
756
Michal Simekcd1457d2018-07-31 14:31:04 +0200757static int fdt_del_partitions(void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100758{
759 const void *prop;
760 int ndepth = 0;
761 int off;
762 int ret;
763
764 off = fdt_next_node(blob, parent_offset, &ndepth);
765 if (off > 0 && ndepth == 1) {
766 prop = fdt_getprop(blob, off, "label", NULL);
767 if (prop == NULL) {
768 /*
769 * Could not find label property, nand {}; node?
770 * Check subnode, delete partitions there if any.
771 */
772 return fdt_del_partitions(blob, off);
773 } else {
774 ret = fdt_del_subnodes(blob, parent_offset);
775 if (ret < 0) {
776 printf("Can't remove subnodes: %s\n",
777 fdt_strerror(ret));
778 return ret;
779 }
780 }
781 }
782 return 0;
783}
784
785int fdt_node_set_part_info(void *blob, int parent_offset,
786 struct mtd_device *dev)
787{
788 struct list_head *pentry;
789 struct part_info *part;
790 struct reg_cell cell;
791 int off, ndepth = 0;
792 int part_num, ret;
793 char buf[64];
794
795 ret = fdt_del_partitions(blob, parent_offset);
796 if (ret < 0)
797 return ret;
798
799 /*
800 * 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
847 cell.r0 = cpu_to_fdt32(part->offset);
848 cell.r1 = cpu_to_fdt32(part->size);
849add_reg:
850 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
851 if (ret == -FDT_ERR_NOSPACE) {
852 ret = fdt_increase_size(blob, 512);
853 if (!ret)
854 goto add_reg;
855 else
856 goto err_size;
857 } else if (ret < 0)
858 goto err_prop;
859
860add_label:
861 ret = fdt_setprop_string(blob, newoff, "label", part->name);
862 if (ret == -FDT_ERR_NOSPACE) {
863 ret = fdt_increase_size(blob, 512);
864 if (!ret)
865 goto add_label;
866 else
867 goto err_size;
868 } else if (ret < 0)
869 goto err_prop;
870
871 part_num++;
872 }
873 return 0;
874err_size:
875 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
876 return ret;
877err_prop:
878 printf("Can't add property: %s\n", fdt_strerror(ret));
879 return ret;
880}
881
882/*
883 * Update partitions in nor/nand nodes using info from
884 * mtdparts environment variable. The nodes to update are
885 * specified by node_info structure which contains mtd device
886 * type and compatible string: E. g. the board code in
887 * ft_board_setup() could use:
888 *
889 * struct node_info nodes[] = {
890 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
891 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
892 * };
893 *
894 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
895 */
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900896void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
897 int node_info_size)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100898{
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100899 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100900 int i, idx;
901 int noff;
902
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100903 if (mtdparts_init() != 0)
904 return;
905
906 for (i = 0; i < node_info_size; i++) {
907 idx = 0;
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900908 noff = fdt_node_offset_by_compatible(blob, -1,
909 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100910 while (noff != -FDT_ERR_NOTFOUND) {
911 debug("%s: %s, mtd dev type %d\n",
912 fdt_get_name(blob, noff, 0),
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900913 node_info[i].compat, node_info[i].type);
914 dev = device_find(node_info[i].type, idx++);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100915 if (dev) {
916 if (fdt_node_set_part_info(blob, noff, dev))
917 return; /* return on error */
918 }
919
920 /* Jump to next flash node */
921 noff = fdt_node_offset_by_compatible(blob, noff,
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900922 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100923 }
924 }
925}
926#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500927
928void fdt_del_node_and_alias(void *blob, const char *alias)
929{
930 int off = fdt_path_offset(blob, alias);
931
932 if (off < 0)
933 return;
934
935 fdt_del_node(blob, off);
936
937 off = fdt_path_offset(blob, "/aliases");
938 fdt_delprop(blob, off, alias);
939}
Kumar Galaa0342c02010-06-16 14:27:38 -0500940
Kumar Galaa0342c02010-06-16 14:27:38 -0500941/* Max address size we deal with */
942#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800943#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100944#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
945 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500946
947/* Debug utility */
948#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000949static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500950{
951 printf("%s", s);
952 while(na--)
953 printf(" %08x", *(addr++));
954 printf("\n");
955}
956#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000957static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500958#endif
959
Paul Burton0a222d52016-05-17 07:43:24 +0100960/**
961 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +0100962 * @name: A string used to identify this bus in debug output.
963 * @addresses: The name of the DT property from which addresses are
964 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +0100965 * @match: Return non-zero if the node whose parent is at
966 * parentoffset in the FDT blob corresponds to a bus
967 * of this type, otherwise return zero. If NULL a match
968 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +0100969 * @count_cells:Count how many cells (be32 values) a node whose parent
970 * is at parentoffset in the FDT blob will require to
971 * represent its address (written to *addrc) & size
972 * (written to *sizec).
973 * @map: Map the address addr from the address space of this
974 * bus to that of its parent, making use of the ranges
975 * read from DT to an array at range. na and ns are the
976 * number of cells (be32 values) used to hold and address
977 * or size, respectively, for this bus. pna is the number
978 * of cells used to hold an address for the parent bus.
979 * Returns the address in the address space of the parent
980 * bus.
981 * @translate: Update the value of the address cells at addr within an
982 * FDT by adding offset to it. na specifies the number of
983 * cells used to hold the address being translated. Returns
984 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +0100985 *
986 * Each bus type will include a struct of_bus in the of_busses array,
987 * providing implementations of some or all of the functions used to
988 * match the bus & handle address translation for its children.
989 */
Kumar Galaa0342c02010-06-16 14:27:38 -0500990struct of_bus {
991 const char *name;
992 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -0600993 int (*match)(const void *blob, int parentoffset);
994 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500995 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000996 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500997 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000998 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500999};
1000
1001/* Default translator (generic bus) */
Simon Glasseed36602017-05-18 20:09:26 -06001002void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001003 int *addrc, int *sizec)
1004{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001005 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -05001006
Simon Glass933cdbb2014-10-23 18:58:57 -06001007 if (addrc)
1008 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -05001009
1010 if (sizec) {
1011 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1012 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001013 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -05001014 else
1015 *sizec = 1;
1016 }
Kumar Galaa0342c02010-06-16 14:27:38 -05001017}
1018
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001019static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001020 int na, int ns, int pna)
1021{
1022 u64 cp, s, da;
1023
Simon Glasseed36602017-05-18 20:09:26 -06001024 cp = fdt_read_number(range, na);
1025 s = fdt_read_number(range + na + pna, ns);
1026 da = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001027
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001028 debug("OF: default map, cp=%llu, s=%llu, da=%llu\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001029
1030 if (da < cp || da >= (cp + s))
1031 return OF_BAD_ADDR;
1032 return da - cp;
1033}
1034
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001035static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001036{
Simon Glasseed36602017-05-18 20:09:26 -06001037 u64 a = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001038 memset(addr, 0, na * 4);
1039 a += offset;
1040 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001041 addr[na - 2] = cpu_to_fdt32(a >> 32);
1042 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001043
1044 return 0;
1045}
1046
Paul Burton0a222d52016-05-17 07:43:24 +01001047#ifdef CONFIG_OF_ISA_BUS
1048
1049/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001050static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001051{
1052 const char *name;
1053
1054 name = fdt_get_name(blob, parentoffset, NULL);
1055 if (!name)
1056 return 0;
1057
1058 return !strcmp(name, "isa");
1059}
1060
Stephen Warren11e44fc2016-08-05 09:47:50 -06001061static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +01001062 int *addrc, int *sizec)
1063{
1064 if (addrc)
1065 *addrc = 2;
1066 if (sizec)
1067 *sizec = 1;
1068}
1069
1070static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1071 int na, int ns, int pna)
1072{
1073 u64 cp, s, da;
1074
1075 /* Check address type match */
1076 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1077 return OF_BAD_ADDR;
1078
Simon Glasseed36602017-05-18 20:09:26 -06001079 cp = fdt_read_number(range + 1, na - 1);
1080 s = fdt_read_number(range + na + pna, ns);
1081 da = fdt_read_number(addr + 1, na - 1);
Paul Burton0a222d52016-05-17 07:43:24 +01001082
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001083 debug("OF: ISA map, cp=%llu, s=%llu, da=%llu\n", cp, s, da);
Paul Burton0a222d52016-05-17 07:43:24 +01001084
1085 if (da < cp || da >= (cp + s))
1086 return OF_BAD_ADDR;
1087 return da - cp;
1088}
1089
1090static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1091{
1092 return of_bus_default_translate(addr + 1, offset, na - 1);
1093}
1094
1095#endif /* CONFIG_OF_ISA_BUS */
1096
Kumar Galaa0342c02010-06-16 14:27:38 -05001097/* Array of bus specific translators */
1098static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001099#ifdef CONFIG_OF_ISA_BUS
1100 /* ISA */
1101 {
1102 .name = "isa",
1103 .addresses = "reg",
1104 .match = of_bus_isa_match,
1105 .count_cells = of_bus_isa_count_cells,
1106 .map = of_bus_isa_map,
1107 .translate = of_bus_isa_translate,
1108 },
1109#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001110 /* Default */
1111 {
1112 .name = "default",
1113 .addresses = "reg",
Simon Glasseed36602017-05-18 20:09:26 -06001114 .count_cells = fdt_support_default_count_cells,
Kumar Galaa0342c02010-06-16 14:27:38 -05001115 .map = of_bus_default_map,
1116 .translate = of_bus_default_translate,
1117 },
1118};
1119
Stephen Warren11e44fc2016-08-05 09:47:50 -06001120static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001121{
1122 struct of_bus *bus;
1123
1124 if (ARRAY_SIZE(of_busses) == 1)
1125 return of_busses;
1126
1127 for (bus = of_busses; bus; bus++) {
1128 if (!bus->match || bus->match(blob, parentoffset))
1129 return bus;
1130 }
1131
1132 /*
1133 * We should always have matched the default bus at least, since
1134 * it has a NULL match field. If we didn't then it somehow isn't
1135 * in the of_busses array or something equally catastrophic has
1136 * gone wrong.
1137 */
1138 assert(0);
1139 return NULL;
1140}
1141
Stephen Warren11e44fc2016-08-05 09:47:50 -06001142static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001143 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001144 int na, int ns, int pna, const char *rprop)
1145{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001146 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001147 int rlen;
1148 int rone;
1149 u64 offset = OF_BAD_ADDR;
1150
1151 /* Normally, an absence of a "ranges" property means we are
1152 * crossing a non-translatable boundary, and thus the addresses
1153 * below the current not cannot be converted to CPU physical ones.
1154 * Unfortunately, while this is very clear in the spec, it's not
1155 * what Apple understood, and they do have things like /uni-n or
1156 * /ht nodes with no "ranges" property and a lot of perfectly
1157 * useable mapped devices below them. Thus we treat the absence of
1158 * "ranges" as equivalent to an empty "ranges" property which means
1159 * a 1:1 translation at that level. It's up to the caller not to try
1160 * to translate addresses that aren't supposed to be translated in
1161 * the first place. --BenH.
1162 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001163 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001164 if (ranges == NULL || rlen == 0) {
Simon Glasseed36602017-05-18 20:09:26 -06001165 offset = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001166 memset(addr, 0, pna * 4);
1167 debug("OF: no ranges, 1:1 translation\n");
1168 goto finish;
1169 }
1170
1171 debug("OF: walking ranges...\n");
1172
1173 /* Now walk through the ranges */
1174 rlen /= 4;
1175 rone = na + pna + ns;
1176 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1177 offset = bus->map(addr, ranges, na, ns, pna);
1178 if (offset != OF_BAD_ADDR)
1179 break;
1180 }
1181 if (offset == OF_BAD_ADDR) {
1182 debug("OF: not found !\n");
1183 return 1;
1184 }
1185 memcpy(addr, ranges + na, 4 * pna);
1186
1187 finish:
1188 of_dump_addr("OF: parent translation for:", addr, pna);
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001189 debug("OF: with offset: %llu\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001190
1191 /* Translate it into parent bus space */
1192 return pbus->translate(addr, offset, pna);
1193}
1194
1195/*
1196 * Translate an address from the device-tree into a CPU physical address,
1197 * this walks up the tree and applies the various bus mappings on the
1198 * way.
1199 *
1200 * Note: We consider that crossing any level with #size-cells == 0 to mean
1201 * that translation is impossible (that is we are not dealing with a value
1202 * that can be mapped to a cpu physical address). This is not really specified
1203 * that way, but this is traditionally the way IBM at least do things
1204 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001205static u64 __of_translate_address(const void *blob, int node_offset,
1206 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001207{
1208 int parent;
1209 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001210 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001211 int na, ns, pna, pns;
1212 u64 result = OF_BAD_ADDR;
1213
1214 debug("OF: ** translation for device %s **\n",
1215 fdt_get_name(blob, node_offset, NULL));
1216
1217 /* Get parent & match bus type */
1218 parent = fdt_parent_offset(blob, node_offset);
1219 if (parent < 0)
1220 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001221 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001222
1223 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001224 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001225 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001226 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1227 fdt_get_name(blob, node_offset, NULL));
1228 goto bail;
1229 }
1230 memcpy(addr, in_addr, na * 4);
1231
1232 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1233 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1234 of_dump_addr("OF: translating address:", addr, na);
1235
1236 /* Translate */
1237 for (;;) {
1238 /* Switch to parent bus */
1239 node_offset = parent;
1240 parent = fdt_parent_offset(blob, node_offset);
1241
1242 /* If root, we have finished */
1243 if (parent < 0) {
1244 debug("OF: reached root node\n");
Simon Glasseed36602017-05-18 20:09:26 -06001245 result = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001246 break;
1247 }
1248
1249 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001250 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001251 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001252 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001253 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1254 fdt_get_name(blob, node_offset, NULL));
1255 break;
1256 }
1257
1258 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1259 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1260
1261 /* Apply bus translation */
1262 if (of_translate_one(blob, node_offset, bus, pbus,
1263 addr, na, ns, pna, rprop))
1264 break;
1265
1266 /* Complete the move up one level */
1267 na = pna;
1268 ns = pns;
1269 bus = pbus;
1270
1271 of_dump_addr("OF: one level translation:", addr, na);
1272 }
1273 bail:
1274
1275 return result;
1276}
1277
Stephen Warren11e44fc2016-08-05 09:47:50 -06001278u64 fdt_translate_address(const void *blob, int node_offset,
1279 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001280{
1281 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1282}
Kumar Gala75e73af2010-07-04 12:48:21 -05001283
1284/**
1285 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1286 * who's reg property matches a physical cpu address
1287 *
1288 * @blob: ptr to device tree
1289 * @compat: compatiable string to match
1290 * @compat_off: property name
1291 *
1292 */
1293int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1294 phys_addr_t compat_off)
1295{
1296 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1297 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001298 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001299 if (reg) {
1300 if (compat_off == fdt_translate_address(blob, off, reg))
1301 return off;
1302 }
1303 off = fdt_node_offset_by_compatible(blob, off, compat);
1304 }
1305
1306 return -FDT_ERR_NOTFOUND;
1307}
1308
Kumar Galab4b847e2010-07-09 16:18:58 -05001309/**
1310 * fdt_alloc_phandle: Return next free phandle value
1311 *
1312 * @blob: ptr to device tree
1313 */
1314int fdt_alloc_phandle(void *blob)
1315{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001316 int offset;
1317 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001318
Kumar Galab4b847e2010-07-09 16:18:58 -05001319 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1320 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001321 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001322 }
1323
1324 return phandle + 1;
1325}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001326
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001327/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001328 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001329 *
1330 * @fdt: ptr to device tree
1331 * @nodeoffset: node to update
1332 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001333 */
1334int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001335{
1336 int ret;
1337
1338#ifdef DEBUG
1339 int off = fdt_node_offset_by_phandle(fdt, phandle);
1340
1341 if ((off >= 0) && (off != nodeoffset)) {
1342 char buf[64];
1343
1344 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1345 printf("Trying to update node %s with phandle %u ",
1346 buf, phandle);
1347
1348 fdt_get_path(fdt, off, buf, sizeof(buf));
1349 printf("that already exists in node %s.\n", buf);
1350 return -FDT_ERR_BADPHANDLE;
1351 }
1352#endif
1353
1354 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1355 if (ret < 0)
1356 return ret;
1357
1358 /*
1359 * For now, also set the deprecated "linux,phandle" property, so that we
1360 * don't break older kernels.
1361 */
1362 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1363
1364 return ret;
1365}
1366
Kumar Gala10aeabd2011-08-01 00:25:20 -05001367/*
1368 * fdt_create_phandle: Create a phandle property for the given node
1369 *
1370 * @fdt: ptr to device tree
1371 * @nodeoffset: node to update
1372 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001373unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001374{
1375 /* see if there is a phandle already */
1376 int phandle = fdt_get_phandle(fdt, nodeoffset);
1377
1378 /* if we got 0, means no phandle so create one */
1379 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001380 int ret;
1381
Kumar Gala10aeabd2011-08-01 00:25:20 -05001382 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001383 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1384 if (ret < 0) {
1385 printf("Can't set phandle %u: %s\n", phandle,
1386 fdt_strerror(ret));
1387 return 0;
1388 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001389 }
1390
1391 return phandle;
1392}
1393
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001394/*
1395 * fdt_set_node_status: Set status for the given node
1396 *
1397 * @fdt: ptr to device tree
1398 * @nodeoffset: node to update
1399 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1400 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1401 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1402 */
1403int fdt_set_node_status(void *fdt, int nodeoffset,
1404 enum fdt_status status, unsigned int error_code)
1405{
1406 char buf[16];
1407 int ret = 0;
1408
1409 if (nodeoffset < 0)
1410 return nodeoffset;
1411
1412 switch (status) {
1413 case FDT_STATUS_OKAY:
1414 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1415 break;
1416 case FDT_STATUS_DISABLED:
1417 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1418 break;
1419 case FDT_STATUS_FAIL:
1420 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1421 break;
1422 case FDT_STATUS_FAIL_ERROR_CODE:
1423 sprintf(buf, "fail-%d", error_code);
1424 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1425 break;
1426 default:
1427 printf("Invalid fdt status: %x\n", status);
1428 ret = -1;
1429 break;
1430 }
1431
1432 return ret;
1433}
1434
1435/*
1436 * fdt_set_status_by_alias: Set status for the given node given an alias
1437 *
1438 * @fdt: ptr to device tree
1439 * @alias: alias of node to update
1440 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1441 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1442 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1443 */
1444int fdt_set_status_by_alias(void *fdt, const char* alias,
1445 enum fdt_status status, unsigned int error_code)
1446{
1447 int offset = fdt_path_offset(fdt, alias);
1448
1449 return fdt_set_node_status(fdt, offset, status, error_code);
1450}
1451
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001452#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001453int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1454{
1455 int noff;
1456 int ret;
1457
1458 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1459 if (noff != -FDT_ERR_NOTFOUND) {
1460 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1461add_edid:
1462 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1463 if (ret == -FDT_ERR_NOSPACE) {
1464 ret = fdt_increase_size(blob, 512);
1465 if (!ret)
1466 goto add_edid;
1467 else
1468 goto err_size;
1469 } else if (ret < 0) {
1470 printf("Can't add property: %s\n", fdt_strerror(ret));
1471 return ret;
1472 }
1473 }
1474 return 0;
1475err_size:
1476 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1477 return ret;
1478}
1479#endif
Timur Tabibb682002011-05-03 13:24:07 -05001480
1481/*
1482 * Verify the physical address of device tree node for a given alias
1483 *
1484 * This function locates the device tree node of a given alias, and then
1485 * verifies that the physical address of that device matches the given
1486 * parameter. It displays a message if there is a mismatch.
1487 *
1488 * Returns 1 on success, 0 on failure
1489 */
1490int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1491{
1492 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001493 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001494 int node, len;
1495 u64 dt_addr;
1496
1497 path = fdt_getprop(fdt, anode, alias, NULL);
1498 if (!path) {
1499 /* If there's no such alias, then it's not a failure */
1500 return 1;
1501 }
1502
1503 node = fdt_path_offset(fdt, path);
1504 if (node < 0) {
1505 printf("Warning: device tree alias '%s' points to invalid "
1506 "node %s.\n", alias, path);
1507 return 0;
1508 }
1509
1510 reg = fdt_getprop(fdt, node, "reg", &len);
1511 if (!reg) {
1512 printf("Warning: device tree node '%s' has no address.\n",
1513 path);
1514 return 0;
1515 }
1516
1517 dt_addr = fdt_translate_address(fdt, node, reg);
1518 if (addr != dt_addr) {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001519 printf("Warning: U-Boot configured device %s at address %llu,\n"
1520 "but the device tree has it address %llx.\n",
1521 alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001522 return 0;
1523 }
1524
1525 return 1;
1526}
1527
1528/*
1529 * Returns the base address of an SOC or PCI node
1530 */
Simon Glassec002112017-05-18 20:09:00 -06001531u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001532{
1533 int size;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001534 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001535
Simon Glass336a4482017-07-04 13:31:20 -06001536 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabibb682002011-05-03 13:24:07 -05001537
Simon Glass336a4482017-07-04 13:31:20 -06001538 return prop ? fdt_translate_address(fdt, node, prop) : 0;
Timur Tabibb682002011-05-03 13:24:07 -05001539}
Alexander Grafc48e6862014-04-11 17:09:41 +02001540
1541/*
1542 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1543 */
1544static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1545 uint64_t *val, int cells)
1546{
1547 const fdt32_t *prop32 = &prop[cell_off];
1548 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1549
1550 if ((cell_off + cells) > prop_len)
1551 return -FDT_ERR_NOSPACE;
1552
1553 switch (cells) {
1554 case 1:
1555 *val = fdt32_to_cpu(*prop32);
1556 break;
1557 case 2:
1558 *val = fdt64_to_cpu(*prop64);
1559 break;
1560 default:
1561 return -FDT_ERR_NOSPACE;
1562 }
1563
1564 return 0;
1565}
1566
1567/**
1568 * fdt_read_range - Read a node's n'th range property
1569 *
1570 * @fdt: ptr to device tree
1571 * @node: offset of node
1572 * @n: range index
1573 * @child_addr: pointer to storage for the "child address" field
1574 * @addr: pointer to storage for the CPU view translated physical start
1575 * @len: pointer to storage for the range length
1576 *
1577 * Convenience function that reads and interprets a specific range out of
1578 * a number of the "ranges" property array.
1579 */
1580int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1581 uint64_t *addr, uint64_t *len)
1582{
1583 int pnode = fdt_parent_offset(fdt, node);
1584 const fdt32_t *ranges;
1585 int pacells;
1586 int acells;
1587 int scells;
1588 int ranges_len;
1589 int cell = 0;
1590 int r = 0;
1591
1592 /*
1593 * The "ranges" property is an array of
1594 * { <child address> <parent address> <size in child address space> }
1595 *
1596 * All 3 elements can span a diffent number of cells. Fetch their size.
1597 */
1598 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1599 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1600 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1601
1602 /* Now try to get the ranges property */
1603 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1604 if (!ranges)
1605 return -FDT_ERR_NOTFOUND;
1606 ranges_len /= sizeof(uint32_t);
1607
1608 /* Jump to the n'th entry */
1609 cell = n * (pacells + acells + scells);
1610
1611 /* Read <child address> */
1612 if (child_addr) {
1613 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1614 acells);
1615 if (r)
1616 return r;
1617 }
1618 cell += acells;
1619
1620 /* Read <parent address> */
1621 if (addr)
1622 *addr = fdt_translate_address(fdt, node, ranges + cell);
1623 cell += pacells;
1624
1625 /* Read <size in child address space> */
1626 if (len) {
1627 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1628 if (r)
1629 return r;
1630 }
1631
1632 return 0;
1633}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001634
1635/**
1636 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1637 *
1638 * @fdt: ptr to device tree
1639 * @node: offset of the simplefb node
1640 * @base_address: framebuffer base address
1641 * @width: width in pixels
1642 * @height: height in pixels
1643 * @stride: bytes per line
1644 * @format: pixel format string
1645 *
1646 * Convenience function to fill and enable a simplefb node.
1647 */
1648int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1649 u32 height, u32 stride, const char *format)
1650{
1651 char name[32];
1652 fdt32_t cells[4];
1653 int i, addrc, sizec, ret;
1654
Simon Glasseed36602017-05-18 20:09:26 -06001655 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1656 &addrc, &sizec);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001657 i = 0;
1658 if (addrc == 2)
1659 cells[i++] = cpu_to_fdt32(base_address >> 32);
1660 cells[i++] = cpu_to_fdt32(base_address);
1661 if (sizec == 2)
1662 cells[i++] = 0;
1663 cells[i++] = cpu_to_fdt32(height * stride);
1664
1665 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1666 if (ret < 0)
1667 return ret;
1668
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001669 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001670 ret = fdt_set_name(fdt, node, name);
1671 if (ret < 0)
1672 return ret;
1673
1674 ret = fdt_setprop_u32(fdt, node, "width", width);
1675 if (ret < 0)
1676 return ret;
1677
1678 ret = fdt_setprop_u32(fdt, node, "height", height);
1679 if (ret < 0)
1680 return ret;
1681
1682 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1683 if (ret < 0)
1684 return ret;
1685
1686 ret = fdt_setprop_string(fdt, node, "format", format);
1687 if (ret < 0)
1688 return ret;
1689
1690 ret = fdt_setprop_string(fdt, node, "status", "okay");
1691 if (ret < 0)
1692 return ret;
1693
1694 return 0;
1695}
Tim Harvey08daa252015-04-08 11:45:39 -07001696
1697/*
1698 * Update native-mode in display-timings from display environment variable.
1699 * The node to update are specified by path.
1700 */
1701int fdt_fixup_display(void *blob, const char *path, const char *display)
1702{
1703 int off, toff;
1704
1705 if (!display || !path)
1706 return -FDT_ERR_NOTFOUND;
1707
1708 toff = fdt_path_offset(blob, path);
1709 if (toff >= 0)
1710 toff = fdt_subnode_offset(blob, toff, "display-timings");
1711 if (toff < 0)
1712 return toff;
1713
1714 for (off = fdt_first_subnode(blob, toff);
1715 off >= 0;
1716 off = fdt_next_subnode(blob, off)) {
1717 uint32_t h = fdt_get_phandle(blob, off);
1718 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1719 fdt32_to_cpu(h));
1720 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1721 return fdt_setprop_u32(blob, toff, "native-mode", h);
1722 }
1723 return toff;
1724}
Pantelis Antonioufc7c3182017-09-04 23:12:11 +03001725
1726#ifdef CONFIG_OF_LIBFDT_OVERLAY
1727/**
1728 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1729 *
1730 * @fdt: ptr to device tree
1731 * @fdto: ptr to device tree overlay
1732 *
1733 * Convenience function to apply an overlay and display helpful messages
1734 * in the case of an error
1735 */
1736int fdt_overlay_apply_verbose(void *fdt, void *fdto)
1737{
1738 int err;
1739 bool has_symbols;
1740
1741 err = fdt_path_offset(fdt, "/__symbols__");
1742 has_symbols = err >= 0;
1743
1744 err = fdt_overlay_apply(fdt, fdto);
1745 if (err < 0) {
1746 printf("failed on fdt_overlay_apply(): %s\n",
1747 fdt_strerror(err));
1748 if (!has_symbols) {
1749 printf("base fdt does did not have a /__symbols__ node\n");
1750 printf("make sure you've compiled with -@\n");
1751 }
1752 }
1753 return err;
1754}
1755#endif