blob: f4f9543d5475d804e9059a51ccb199604605fc7b [file] [log] [blame]
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04001/*
2 * (C) Copyright 2007
3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4 *
Shengzhou Liu2a523f52011-10-14 16:26:05 +08005 * Copyright 2010-2011 Freescale Semiconductor, Inc.
Kumar Galaa0342c02010-06-16 14:27:38 -05006 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02007 * SPDX-License-Identifier: GPL-2.0+
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04008 */
9
10#include <common.h>
Simon Glasse48f3742014-11-11 12:47:07 -070011#include <inttypes.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040012#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040013#include <linux/ctype.h>
14#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040015#include <asm/global_data.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040016#include <libfdt.h>
17#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060018#include <exports.h>
Bin Menga0ae3802015-12-07 01:39:47 -080019#include <fdtdec.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040020
Kumar Gala3bed2aa2008-10-23 00:05:47 -050021/**
Alexander Graf94fb1822014-04-11 17:09:40 +020022 * fdt_getprop_u32_default_node - Return a node's property or a default
23 *
24 * @fdt: ptr to device tree
25 * @off: offset of node
26 * @cell: cell offset in property
27 * @prop: property name
28 * @dflt: default value if the property isn't found
29 *
30 * Convenience function to return a node's property or a default value if
31 * the property doesn't exist.
32 */
33u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
34 const char *prop, const u32 dflt)
35{
36 const fdt32_t *val;
37 int len;
38
39 val = fdt_getprop(fdt, off, prop, &len);
40
41 /* Check if property exists */
42 if (!val)
43 return dflt;
44
45 /* Check if property is long enough */
46 if (len < ((cell + 1) * sizeof(uint32_t)))
47 return dflt;
48
49 return fdt32_to_cpu(*val);
50}
51
52/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050053 * fdt_getprop_u32_default - Find a node and return it's property or a default
54 *
55 * @fdt: ptr to device tree
56 * @path: path of node
57 * @prop: property name
58 * @dflt: default value if the property isn't found
59 *
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
62 */
Gabe Black07e12782011-11-08 01:09:44 -080063u32 fdt_getprop_u32_default(const void *fdt, const char *path,
64 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050065{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050066 int off;
67
68 off = fdt_path_offset(fdt, path);
69 if (off < 0)
70 return dflt;
71
Alexander Graf94fb1822014-04-11 17:09:40 +020072 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050073}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040074
Kumar Galaa3c29332007-10-24 10:21:57 -050075/**
76 * fdt_find_and_setprop: Find a node and set it's property
77 *
78 * @fdt: ptr to device tree
79 * @node: path of node
80 * @prop: property name
81 * @val: ptr to new value
82 * @len: length of new property value
83 * @create: flag to create the property if it doesn't exist
84 *
85 * Convenience function to directly set a property given the path to the node.
86 */
87int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
88 const void *val, int len, int create)
89{
Kumar Gala8d04f022007-10-24 11:04:22 -050090 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050091
92 if (nodeoff < 0)
93 return nodeoff;
94
Kim Phillips8aa5ec62013-01-16 14:00:11 +000095 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -050096 return 0; /* create flag not set; so exit quietly */
97
98 return fdt_setprop(fdt, nodeoff, prop, val, len);
99}
100
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900101/**
Simon Glassa9e8e292014-10-23 18:58:49 -0600102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
103 *
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900104 * @fdt: pointer to the device tree blob
105 * @parentoffset: structure block offset of a node
106 * @name: name of the subnode to locate
107 *
108 * fdt_subnode_offset() finds a subnode of the node with a given name.
109 * If the subnode does not exist, it will be created.
110 */
Simon Glassa9e8e292014-10-23 18:58:49 -0600111int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900112{
113 int offset;
114
115 offset = fdt_subnode_offset(fdt, parentoffset, name);
116
117 if (offset == -FDT_ERR_NOTFOUND)
118 offset = fdt_add_subnode(fdt, parentoffset, name);
119
120 if (offset < 0)
121 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
122
123 return offset;
124}
125
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900126/* rename to CONFIG_OF_STDOUT_PATH ? */
127#if defined(OF_STDOUT_PATH)
128static int fdt_fixup_stdout(void *fdt, int chosenoff)
129{
130 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
131 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
132}
133#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Detlev Zundel40777812008-06-20 22:24:05 +0200134static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600135{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900136 int err;
137 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600138 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900139 const void *path;
140 int len;
141 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600142
Bin Meng9f29aeb2016-01-13 19:38:58 -0800143 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600144
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900145 aliasoff = fdt_path_offset(fdt, "/aliases");
146 if (aliasoff < 0) {
147 err = aliasoff;
Scott Woodda77c812015-09-01 22:48:08 -0500148 goto noalias;
Kumar Gala151c8b02007-11-26 17:06:15 -0600149 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900150
151 path = fdt_getprop(fdt, aliasoff, sername, &len);
152 if (!path) {
153 err = len;
Scott Woodda77c812015-09-01 22:48:08 -0500154 goto noalias;
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900155 }
156
157 /* fdt_setprop may break "path" so we copy it to tmp buffer */
158 memcpy(tmp, path, len);
159
160 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
Kumar Gala151c8b02007-11-26 17:06:15 -0600161 if (err < 0)
162 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900163 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600164
165 return err;
Scott Woodda77c812015-09-01 22:48:08 -0500166
167noalias:
168 printf("WARNING: %s: could not read %s alias: %s\n",
169 __func__, sername, fdt_strerror(err));
170
171 return 0;
Kumar Gala151c8b02007-11-26 17:06:15 -0600172}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900173#else
174static int fdt_fixup_stdout(void *fdt, int chosenoff)
175{
176 return 0;
177}
Kumar Gala151c8b02007-11-26 17:06:15 -0600178#endif
179
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900180static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
181 uint64_t val, int is_u64)
182{
183 if (is_u64)
184 return fdt_setprop_u64(fdt, nodeoffset, name, val);
185 else
186 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
187}
188
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200189int fdt_root(void *fdt)
190{
191 char *serial;
192 int err;
193
194 err = fdt_check_header(fdt);
195 if (err < 0) {
196 printf("fdt_root: %s\n", fdt_strerror(err));
197 return err;
198 }
199
Simon Glass00caae62017-08-03 12:22:12 -0600200 serial = env_get("serial#");
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200201 if (serial) {
202 err = fdt_setprop(fdt, 0, "serial-number", serial,
203 strlen(serial) + 1);
204
205 if (err < 0) {
206 printf("WARNING: could not set serial-number %s.\n",
207 fdt_strerror(err));
208 return err;
209 }
210 }
211
212 return 0;
213}
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900214
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900215int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500216{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900217 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500218 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900219 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500220 uint64_t addr, size;
221
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900222 /* just return if the size of initrd is zero */
223 if (initrd_start == initrd_end)
224 return 0;
225
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900226 /* find or create "/chosen" node. */
227 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
228 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500229 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500230
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500231 total = fdt_num_mem_rsv(fdt);
232
233 /*
234 * Look for an existing entry and update it. If we don't find
235 * the entry, we will j be the next available slot.
236 */
237 for (j = 0; j < total; j++) {
238 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
239 if (addr == initrd_start) {
240 fdt_del_mem_rsv(fdt, j);
241 break;
242 }
243 }
244
Grant Likelyce6b27a2011-03-28 09:58:55 +0000245 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500246 if (err < 0) {
247 printf("fdt_initrd: %s\n", fdt_strerror(err));
248 return err;
249 }
250
Simon Glass933cdbb2014-10-23 18:58:57 -0600251 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800252
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900253 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
254 (uint64_t)initrd_start, is_u64);
255
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900256 if (err < 0) {
257 printf("WARNING: could not set linux,initrd-start %s.\n",
258 fdt_strerror(err));
259 return err;
260 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900261
262 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
263 (uint64_t)initrd_end, is_u64);
264
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900265 if (err < 0) {
266 printf("WARNING: could not set linux,initrd-end %s.\n",
267 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500268
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900269 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500270 }
271
272 return 0;
273}
274
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900275int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400276{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400277 int nodeoffset;
278 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400279 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400280
281 err = fdt_check_header(fdt);
282 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400283 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400284 return err;
285 }
286
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900287 /* find or create "/chosen" node. */
288 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
289 if (nodeoffset < 0)
290 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400291
Simon Glass00caae62017-08-03 12:22:12 -0600292 str = env_get("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900293 if (str) {
294 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
295 strlen(str) + 1);
296 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900297 printf("WARNING: could not set bootargs %s.\n",
298 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900299 return err;
300 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400301 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500302
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900303 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400304}
305
Kumar Galae93becf2007-11-03 19:46:28 -0500306void do_fixup_by_path(void *fdt, const char *path, const char *prop,
307 const void *val, int len, int create)
308{
309#if defined(DEBUG)
310 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600311 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500312 for (i = 0; i < len; i++)
313 debug(" %.2x", *(u8*)(val+i));
314 debug("\n");
315#endif
316 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
317 if (rc)
318 printf("Unable to update property %s:%s, err=%s\n",
319 path, prop, fdt_strerror(rc));
320}
321
322void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
323 u32 val, int create)
324{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000325 fdt32_t tmp = cpu_to_fdt32(val);
326 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500327}
328
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600329void do_fixup_by_prop(void *fdt,
330 const char *pname, const void *pval, int plen,
331 const char *prop, const void *val, int len,
332 int create)
333{
334 int off;
335#if defined(DEBUG)
336 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600337 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600338 for (i = 0; i < len; i++)
339 debug(" %.2x", *(u8*)(val+i));
340 debug("\n");
341#endif
342 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
343 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000344 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600345 fdt_setprop(fdt, off, prop, val, len);
346 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
347 }
348}
349
350void do_fixup_by_prop_u32(void *fdt,
351 const char *pname, const void *pval, int plen,
352 const char *prop, u32 val, int create)
353{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000354 fdt32_t tmp = cpu_to_fdt32(val);
355 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600356}
357
358void do_fixup_by_compat(void *fdt, const char *compat,
359 const char *prop, const void *val, int len, int create)
360{
361 int off = -1;
362#if defined(DEBUG)
363 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600364 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600365 for (i = 0; i < len; i++)
366 debug(" %.2x", *(u8*)(val+i));
367 debug("\n");
368#endif
369 off = fdt_node_offset_by_compatible(fdt, -1, compat);
370 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000371 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600372 fdt_setprop(fdt, off, prop, val, len);
373 off = fdt_node_offset_by_compatible(fdt, off, compat);
374 }
375}
376
377void do_fixup_by_compat_u32(void *fdt, const char *compat,
378 const char *prop, u32 val, int create)
379{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000380 fdt32_t tmp = cpu_to_fdt32(val);
381 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600382}
383
Masahiro Yamada63c09412016-11-26 11:02:10 +0900384#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900385/*
386 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
387 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600388static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
389 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900390{
391 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100392 int address_cells = fdt_address_cells(fdt, 0);
393 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900394 char *p = buf;
395
396 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100397 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900398 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
399 else
400 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100401 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900402
Hans de Goedeffccb842014-11-28 14:23:51 +0100403 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900404 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
405 else
406 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100407 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900408 }
409
410 return p - (char *)buf;
411}
412
Doug Anderson5e574542013-04-30 10:22:00 +0000413#ifdef CONFIG_NR_DRAM_BANKS
414#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
415#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000416#define MEMORY_BANKS_MAX 4
Doug Anderson5e574542013-04-30 10:22:00 +0000417#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600418int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
419{
420 int err, nodeoffset;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900421 int len;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000422 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600423
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000424 if (banks > MEMORY_BANKS_MAX) {
425 printf("%s: num banks %d exceeds hardcoded limit %d."
426 " Recompile with higher MEMORY_BANKS_MAX?\n",
427 __FUNCTION__, banks, MEMORY_BANKS_MAX);
428 return -1;
429 }
430
Kumar Gala3c927282007-11-26 14:57:45 -0600431 err = fdt_check_header(blob);
432 if (err < 0) {
433 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
434 return err;
435 }
436
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900437 /* find or create "/memory" node. */
438 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
439 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800440 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900441
Kumar Gala3c927282007-11-26 14:57:45 -0600442 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
443 sizeof("memory"));
444 if (err < 0) {
445 printf("WARNING: could not set %s %s.\n", "device_type",
446 fdt_strerror(err));
447 return err;
448 }
449
Andre Przywara5c1cf892015-06-21 00:29:54 +0100450 if (!banks)
451 return 0;
452
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900453 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600454
455 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
456 if (err < 0) {
457 printf("WARNING: could not set %s %s.\n",
458 "reg", fdt_strerror(err));
459 return err;
460 }
461 return 0;
462}
Masahiro Yamada63c09412016-11-26 11:02:10 +0900463#endif
Kumar Gala3c927282007-11-26 14:57:45 -0600464
John Rigbya6bd9e82010-10-13 13:57:33 -0600465int fdt_fixup_memory(void *blob, u64 start, u64 size)
466{
467 return fdt_fixup_memory_banks(blob, &start, &size, 1);
468}
469
Kumar Galaba37aa02008-08-19 15:41:18 -0500470void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600471{
Lev Iserovicha434fd12016-01-07 18:04:16 -0500472 int i, j, prop;
Bin Mengbc393a72015-11-03 04:24:41 -0800473 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000474 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600475 const char *path;
oliver@schinagl.nla40db6d2016-11-25 16:30:19 +0100476 unsigned char mac_addr[ARP_HLEN];
Bin Mengbc393a72015-11-03 04:24:41 -0800477 int offset;
Kumar Galaab544632007-11-21 11:11:03 -0600478
Lev Iserovicha434fd12016-01-07 18:04:16 -0500479 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galaba37aa02008-08-19 15:41:18 -0500480 return;
481
Lev Iserovicha434fd12016-01-07 18:04:16 -0500482 /* Cycle through all aliases */
483 for (prop = 0; ; prop++) {
Bin Mengbc393a72015-11-03 04:24:41 -0800484 const char *name;
Bin Mengbc393a72015-11-03 04:24:41 -0800485
Lev Iserovicha434fd12016-01-07 18:04:16 -0500486 /* FDT might have been edited, recompute the offset */
487 offset = fdt_first_property_offset(fdt,
488 fdt_path_offset(fdt, "/aliases"));
489 /* Select property number 'prop' */
490 for (i = 0; i < prop; i++)
491 offset = fdt_next_property_offset(fdt, offset);
492
493 if (offset < 0)
494 break;
495
Bin Mengbc393a72015-11-03 04:24:41 -0800496 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200497 if (!strncmp(name, "ethernet", 8)) {
498 /* Treat plain "ethernet" same as "ethernet0". */
499 if (!strcmp(name, "ethernet"))
500 i = 0;
501 else
502 i = trailing_strtol(name);
503
Bin Mengbc393a72015-11-03 04:24:41 -0800504 if (i != -1) {
505 if (i == 0)
506 strcpy(mac, "ethaddr");
507 else
508 sprintf(mac, "eth%daddr", i);
509 } else {
510 continue;
511 }
Simon Glass00caae62017-08-03 12:22:12 -0600512 tmp = env_get(mac);
Bin Mengbc393a72015-11-03 04:24:41 -0800513 if (!tmp)
514 continue;
515
516 for (j = 0; j < 6; j++) {
517 mac_addr[j] = tmp ?
518 simple_strtoul(tmp, &end, 16) : 0;
519 if (tmp)
520 tmp = (*end) ? end + 1 : end;
521 }
522
523 do_fixup_by_path(fdt, path, "mac-address",
524 &mac_addr, 6, 0);
525 do_fixup_by_path(fdt, path, "local-mac-address",
526 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500527 }
Kumar Galaab544632007-11-21 11:11:03 -0600528 }
529}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300530
Kumar Gala3082d232008-08-15 08:24:42 -0500531/* Resize the fdt to its actual size + a bit of padding */
Hannes Schmelzeref476832016-09-20 18:10:43 +0200532int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Gala3082d232008-08-15 08:24:42 -0500533{
534 int i;
535 uint64_t addr, size;
536 int total, ret;
537 uint actualsize;
538
539 if (!blob)
540 return 0;
541
542 total = fdt_num_mem_rsv(blob);
543 for (i = 0; i < total; i++) {
544 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000545 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500546 fdt_del_mem_rsv(blob, i);
547 break;
548 }
549 }
550
Peter Korsgaardf242a082008-10-28 08:26:52 +0100551 /*
552 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200553 * plus the size needed for 5 fdt_add_mem_rsv, one
554 * for the fdt itself and 4 for a possible initrd
555 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100556 */
Kumar Gala3082d232008-08-15 08:24:42 -0500557 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200558 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500559
Hannes Schmelzeref476832016-09-20 18:10:43 +0200560 actualsize += extrasize;
Kumar Gala3082d232008-08-15 08:24:42 -0500561 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000562 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
563 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500564
565 /* Change the fdt header to reflect the correct size */
566 fdt_set_totalsize(blob, actualsize);
567
568 /* Add the new reservation */
Simon Glass92549352011-09-17 06:48:58 +0000569 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500570 if (ret < 0)
571 return ret;
572
573 return actualsize;
574}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500575
576#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500577#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500578
579#define FDT_PCI_PREFETCH (0x40000000)
580#define FDT_PCI_MEM32 (0x02000000)
581#define FDT_PCI_IO (0x01000000)
582#define FDT_PCI_MEM64 (0x03000000)
583
584int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
585
586 int addrcell, sizecell, len, r;
587 u32 *dma_range;
588 /* sized based on pci addr cells, size-cells, & address-cells */
589 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
590
591 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
592 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
593
594 dma_range = &dma_ranges[0];
595 for (r = 0; r < hose->region_count; r++) {
596 u64 bus_start, phys_start, size;
597
Kumar Galaff4e66e2009-02-06 09:49:31 -0600598 /* skip if !PCI_REGION_SYS_MEMORY */
599 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500600 continue;
601
602 bus_start = (u64)hose->regions[r].bus_start;
603 phys_start = (u64)hose->regions[r].phys_start;
604 size = (u64)hose->regions[r].size;
605
606 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500607 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500608 dma_range[0] |= FDT_PCI_MEM64;
609 else
610 dma_range[0] |= FDT_PCI_MEM32;
611 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
612 dma_range[0] |= FDT_PCI_PREFETCH;
613#ifdef CONFIG_SYS_PCI_64BIT
614 dma_range[1] = bus_start >> 32;
615#else
616 dma_range[1] = 0;
617#endif
618 dma_range[2] = bus_start & 0xffffffff;
619
620 if (addrcell == 2) {
621 dma_range[3] = phys_start >> 32;
622 dma_range[4] = phys_start & 0xffffffff;
623 } else {
624 dma_range[3] = phys_start & 0xffffffff;
625 }
626
627 if (sizecell == 2) {
628 dma_range[3 + addrcell + 0] = size >> 32;
629 dma_range[3 + addrcell + 1] = size & 0xffffffff;
630 } else {
631 dma_range[3 + addrcell + 0] = size & 0xffffffff;
632 }
633
634 dma_range += (3 + addrcell + sizecell);
635 }
636
637 len = dma_range - &dma_ranges[0];
638 if (len)
639 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
640
641 return 0;
642}
643#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200644
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200645int fdt_increase_size(void *fdt, int add_len)
646{
647 int newlen;
648
649 newlen = fdt_totalsize(fdt) + add_len;
650
651 /* Open in place with a new len */
652 return fdt_open_into(fdt, fdt, newlen);
653}
654
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100655#ifdef CONFIG_FDT_FIXUP_PARTITIONS
656#include <jffs2/load_kernel.h>
657#include <mtd_node.h>
658
659struct reg_cell {
660 unsigned int r0;
661 unsigned int r1;
662};
663
664int fdt_del_subnodes(const void *blob, int parent_offset)
665{
666 int off, ndepth;
667 int ret;
668
669 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
670 (off >= 0) && (ndepth > 0);
671 off = fdt_next_node(blob, off, &ndepth)) {
672 if (ndepth == 1) {
673 debug("delete %s: offset: %x\n",
674 fdt_get_name(blob, off, 0), off);
675 ret = fdt_del_node((void *)blob, off);
676 if (ret < 0) {
677 printf("Can't delete node: %s\n",
678 fdt_strerror(ret));
679 return ret;
680 } else {
681 ndepth = 0;
682 off = parent_offset;
683 }
684 }
685 }
686 return 0;
687}
688
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100689int fdt_del_partitions(void *blob, int parent_offset)
690{
691 const void *prop;
692 int ndepth = 0;
693 int off;
694 int ret;
695
696 off = fdt_next_node(blob, parent_offset, &ndepth);
697 if (off > 0 && ndepth == 1) {
698 prop = fdt_getprop(blob, off, "label", NULL);
699 if (prop == NULL) {
700 /*
701 * Could not find label property, nand {}; node?
702 * Check subnode, delete partitions there if any.
703 */
704 return fdt_del_partitions(blob, off);
705 } else {
706 ret = fdt_del_subnodes(blob, parent_offset);
707 if (ret < 0) {
708 printf("Can't remove subnodes: %s\n",
709 fdt_strerror(ret));
710 return ret;
711 }
712 }
713 }
714 return 0;
715}
716
717int fdt_node_set_part_info(void *blob, int parent_offset,
718 struct mtd_device *dev)
719{
720 struct list_head *pentry;
721 struct part_info *part;
722 struct reg_cell cell;
723 int off, ndepth = 0;
724 int part_num, ret;
725 char buf[64];
726
727 ret = fdt_del_partitions(blob, parent_offset);
728 if (ret < 0)
729 return ret;
730
731 /*
732 * Check if it is nand {}; subnode, adjust
733 * the offset in this case
734 */
735 off = fdt_next_node(blob, parent_offset, &ndepth);
736 if (off > 0 && ndepth == 1)
737 parent_offset = off;
738
739 part_num = 0;
740 list_for_each_prev(pentry, &dev->parts) {
741 int newoff;
742
743 part = list_entry(pentry, struct part_info, link);
744
Scott Wood06503f12013-10-15 17:41:27 -0500745 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100746 part_num, part->name, part->size,
747 part->offset, part->mask_flags);
748
Scott Wood06503f12013-10-15 17:41:27 -0500749 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100750add_sub:
751 ret = fdt_add_subnode(blob, parent_offset, buf);
752 if (ret == -FDT_ERR_NOSPACE) {
753 ret = fdt_increase_size(blob, 512);
754 if (!ret)
755 goto add_sub;
756 else
757 goto err_size;
758 } else if (ret < 0) {
759 printf("Can't add partition node: %s\n",
760 fdt_strerror(ret));
761 return ret;
762 }
763 newoff = ret;
764
765 /* Check MTD_WRITEABLE_CMD flag */
766 if (part->mask_flags & 1) {
767add_ro:
768 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
769 if (ret == -FDT_ERR_NOSPACE) {
770 ret = fdt_increase_size(blob, 512);
771 if (!ret)
772 goto add_ro;
773 else
774 goto err_size;
775 } else if (ret < 0)
776 goto err_prop;
777 }
778
779 cell.r0 = cpu_to_fdt32(part->offset);
780 cell.r1 = cpu_to_fdt32(part->size);
781add_reg:
782 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
783 if (ret == -FDT_ERR_NOSPACE) {
784 ret = fdt_increase_size(blob, 512);
785 if (!ret)
786 goto add_reg;
787 else
788 goto err_size;
789 } else if (ret < 0)
790 goto err_prop;
791
792add_label:
793 ret = fdt_setprop_string(blob, newoff, "label", part->name);
794 if (ret == -FDT_ERR_NOSPACE) {
795 ret = fdt_increase_size(blob, 512);
796 if (!ret)
797 goto add_label;
798 else
799 goto err_size;
800 } else if (ret < 0)
801 goto err_prop;
802
803 part_num++;
804 }
805 return 0;
806err_size:
807 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
808 return ret;
809err_prop:
810 printf("Can't add property: %s\n", fdt_strerror(ret));
811 return ret;
812}
813
814/*
815 * Update partitions in nor/nand nodes using info from
816 * mtdparts environment variable. The nodes to update are
817 * specified by node_info structure which contains mtd device
818 * type and compatible string: E. g. the board code in
819 * ft_board_setup() could use:
820 *
821 * struct node_info nodes[] = {
822 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
823 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
824 * };
825 *
826 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
827 */
828void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
829{
830 struct node_info *ni = node_info;
831 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100832 int i, idx;
833 int noff;
834
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100835 if (mtdparts_init() != 0)
836 return;
837
838 for (i = 0; i < node_info_size; i++) {
839 idx = 0;
840 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
841 while (noff != -FDT_ERR_NOTFOUND) {
842 debug("%s: %s, mtd dev type %d\n",
843 fdt_get_name(blob, noff, 0),
844 ni[i].compat, ni[i].type);
845 dev = device_find(ni[i].type, idx++);
846 if (dev) {
847 if (fdt_node_set_part_info(blob, noff, dev))
848 return; /* return on error */
849 }
850
851 /* Jump to next flash node */
852 noff = fdt_node_offset_by_compatible(blob, noff,
853 ni[i].compat);
854 }
855 }
856}
857#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500858
859void fdt_del_node_and_alias(void *blob, const char *alias)
860{
861 int off = fdt_path_offset(blob, alias);
862
863 if (off < 0)
864 return;
865
866 fdt_del_node(blob, off);
867
868 off = fdt_path_offset(blob, "/aliases");
869 fdt_delprop(blob, off, alias);
870}
Kumar Galaa0342c02010-06-16 14:27:38 -0500871
Kumar Galaa0342c02010-06-16 14:27:38 -0500872/* Max address size we deal with */
873#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800874#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100875#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
876 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500877
878/* Debug utility */
879#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000880static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500881{
882 printf("%s", s);
883 while(na--)
884 printf(" %08x", *(addr++));
885 printf("\n");
886}
887#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000888static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500889#endif
890
Paul Burton0a222d52016-05-17 07:43:24 +0100891/**
892 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +0100893 * @name: A string used to identify this bus in debug output.
894 * @addresses: The name of the DT property from which addresses are
895 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +0100896 * @match: Return non-zero if the node whose parent is at
897 * parentoffset in the FDT blob corresponds to a bus
898 * of this type, otherwise return zero. If NULL a match
899 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +0100900 * @count_cells:Count how many cells (be32 values) a node whose parent
901 * is at parentoffset in the FDT blob will require to
902 * represent its address (written to *addrc) & size
903 * (written to *sizec).
904 * @map: Map the address addr from the address space of this
905 * bus to that of its parent, making use of the ranges
906 * read from DT to an array at range. na and ns are the
907 * number of cells (be32 values) used to hold and address
908 * or size, respectively, for this bus. pna is the number
909 * of cells used to hold an address for the parent bus.
910 * Returns the address in the address space of the parent
911 * bus.
912 * @translate: Update the value of the address cells at addr within an
913 * FDT by adding offset to it. na specifies the number of
914 * cells used to hold the address being translated. Returns
915 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +0100916 *
917 * Each bus type will include a struct of_bus in the of_busses array,
918 * providing implementations of some or all of the functions used to
919 * match the bus & handle address translation for its children.
920 */
Kumar Galaa0342c02010-06-16 14:27:38 -0500921struct of_bus {
922 const char *name;
923 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -0600924 int (*match)(const void *blob, int parentoffset);
925 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500926 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000927 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500928 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000929 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500930};
931
932/* Default translator (generic bus) */
Simon Glasseed36602017-05-18 20:09:26 -0600933void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500934 int *addrc, int *sizec)
935{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000936 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -0500937
Simon Glass933cdbb2014-10-23 18:58:57 -0600938 if (addrc)
939 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -0500940
941 if (sizec) {
942 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
943 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000944 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500945 else
946 *sizec = 1;
947 }
Kumar Galaa0342c02010-06-16 14:27:38 -0500948}
949
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000950static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500951 int na, int ns, int pna)
952{
953 u64 cp, s, da;
954
Simon Glasseed36602017-05-18 20:09:26 -0600955 cp = fdt_read_number(range, na);
956 s = fdt_read_number(range + na + pna, ns);
957 da = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500958
Simon Glasse48f3742014-11-11 12:47:07 -0700959 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
960 ", da=%" PRIu64 "\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -0500961
962 if (da < cp || da >= (cp + s))
963 return OF_BAD_ADDR;
964 return da - cp;
965}
966
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000967static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500968{
Simon Glasseed36602017-05-18 20:09:26 -0600969 u64 a = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500970 memset(addr, 0, na * 4);
971 a += offset;
972 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000973 addr[na - 2] = cpu_to_fdt32(a >> 32);
974 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -0500975
976 return 0;
977}
978
Paul Burton0a222d52016-05-17 07:43:24 +0100979#ifdef CONFIG_OF_ISA_BUS
980
981/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -0600982static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +0100983{
984 const char *name;
985
986 name = fdt_get_name(blob, parentoffset, NULL);
987 if (!name)
988 return 0;
989
990 return !strcmp(name, "isa");
991}
992
Stephen Warren11e44fc2016-08-05 09:47:50 -0600993static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +0100994 int *addrc, int *sizec)
995{
996 if (addrc)
997 *addrc = 2;
998 if (sizec)
999 *sizec = 1;
1000}
1001
1002static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1003 int na, int ns, int pna)
1004{
1005 u64 cp, s, da;
1006
1007 /* Check address type match */
1008 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1009 return OF_BAD_ADDR;
1010
Simon Glasseed36602017-05-18 20:09:26 -06001011 cp = fdt_read_number(range + 1, na - 1);
1012 s = fdt_read_number(range + na + pna, ns);
1013 da = fdt_read_number(addr + 1, na - 1);
Paul Burton0a222d52016-05-17 07:43:24 +01001014
1015 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64
1016 ", da=%" PRIu64 "\n", cp, s, da);
1017
1018 if (da < cp || da >= (cp + s))
1019 return OF_BAD_ADDR;
1020 return da - cp;
1021}
1022
1023static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1024{
1025 return of_bus_default_translate(addr + 1, offset, na - 1);
1026}
1027
1028#endif /* CONFIG_OF_ISA_BUS */
1029
Kumar Galaa0342c02010-06-16 14:27:38 -05001030/* Array of bus specific translators */
1031static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001032#ifdef CONFIG_OF_ISA_BUS
1033 /* ISA */
1034 {
1035 .name = "isa",
1036 .addresses = "reg",
1037 .match = of_bus_isa_match,
1038 .count_cells = of_bus_isa_count_cells,
1039 .map = of_bus_isa_map,
1040 .translate = of_bus_isa_translate,
1041 },
1042#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001043 /* Default */
1044 {
1045 .name = "default",
1046 .addresses = "reg",
Simon Glasseed36602017-05-18 20:09:26 -06001047 .count_cells = fdt_support_default_count_cells,
Kumar Galaa0342c02010-06-16 14:27:38 -05001048 .map = of_bus_default_map,
1049 .translate = of_bus_default_translate,
1050 },
1051};
1052
Stephen Warren11e44fc2016-08-05 09:47:50 -06001053static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001054{
1055 struct of_bus *bus;
1056
1057 if (ARRAY_SIZE(of_busses) == 1)
1058 return of_busses;
1059
1060 for (bus = of_busses; bus; bus++) {
1061 if (!bus->match || bus->match(blob, parentoffset))
1062 return bus;
1063 }
1064
1065 /*
1066 * We should always have matched the default bus at least, since
1067 * it has a NULL match field. If we didn't then it somehow isn't
1068 * in the of_busses array or something equally catastrophic has
1069 * gone wrong.
1070 */
1071 assert(0);
1072 return NULL;
1073}
1074
Stephen Warren11e44fc2016-08-05 09:47:50 -06001075static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001076 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001077 int na, int ns, int pna, const char *rprop)
1078{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001079 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001080 int rlen;
1081 int rone;
1082 u64 offset = OF_BAD_ADDR;
1083
1084 /* Normally, an absence of a "ranges" property means we are
1085 * crossing a non-translatable boundary, and thus the addresses
1086 * below the current not cannot be converted to CPU physical ones.
1087 * Unfortunately, while this is very clear in the spec, it's not
1088 * what Apple understood, and they do have things like /uni-n or
1089 * /ht nodes with no "ranges" property and a lot of perfectly
1090 * useable mapped devices below them. Thus we treat the absence of
1091 * "ranges" as equivalent to an empty "ranges" property which means
1092 * a 1:1 translation at that level. It's up to the caller not to try
1093 * to translate addresses that aren't supposed to be translated in
1094 * the first place. --BenH.
1095 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001096 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001097 if (ranges == NULL || rlen == 0) {
Simon Glasseed36602017-05-18 20:09:26 -06001098 offset = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001099 memset(addr, 0, pna * 4);
1100 debug("OF: no ranges, 1:1 translation\n");
1101 goto finish;
1102 }
1103
1104 debug("OF: walking ranges...\n");
1105
1106 /* Now walk through the ranges */
1107 rlen /= 4;
1108 rone = na + pna + ns;
1109 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1110 offset = bus->map(addr, ranges, na, ns, pna);
1111 if (offset != OF_BAD_ADDR)
1112 break;
1113 }
1114 if (offset == OF_BAD_ADDR) {
1115 debug("OF: not found !\n");
1116 return 1;
1117 }
1118 memcpy(addr, ranges + na, 4 * pna);
1119
1120 finish:
1121 of_dump_addr("OF: parent translation for:", addr, pna);
Simon Glasse48f3742014-11-11 12:47:07 -07001122 debug("OF: with offset: %" PRIu64 "\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001123
1124 /* Translate it into parent bus space */
1125 return pbus->translate(addr, offset, pna);
1126}
1127
1128/*
1129 * Translate an address from the device-tree into a CPU physical address,
1130 * this walks up the tree and applies the various bus mappings on the
1131 * way.
1132 *
1133 * Note: We consider that crossing any level with #size-cells == 0 to mean
1134 * that translation is impossible (that is we are not dealing with a value
1135 * that can be mapped to a cpu physical address). This is not really specified
1136 * that way, but this is traditionally the way IBM at least do things
1137 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001138static u64 __of_translate_address(const void *blob, int node_offset,
1139 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001140{
1141 int parent;
1142 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001143 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001144 int na, ns, pna, pns;
1145 u64 result = OF_BAD_ADDR;
1146
1147 debug("OF: ** translation for device %s **\n",
1148 fdt_get_name(blob, node_offset, NULL));
1149
1150 /* Get parent & match bus type */
1151 parent = fdt_parent_offset(blob, node_offset);
1152 if (parent < 0)
1153 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001154 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001155
1156 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001157 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001158 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001159 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1160 fdt_get_name(blob, node_offset, NULL));
1161 goto bail;
1162 }
1163 memcpy(addr, in_addr, na * 4);
1164
1165 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1166 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1167 of_dump_addr("OF: translating address:", addr, na);
1168
1169 /* Translate */
1170 for (;;) {
1171 /* Switch to parent bus */
1172 node_offset = parent;
1173 parent = fdt_parent_offset(blob, node_offset);
1174
1175 /* If root, we have finished */
1176 if (parent < 0) {
1177 debug("OF: reached root node\n");
Simon Glasseed36602017-05-18 20:09:26 -06001178 result = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001179 break;
1180 }
1181
1182 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001183 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001184 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001185 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001186 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1187 fdt_get_name(blob, node_offset, NULL));
1188 break;
1189 }
1190
1191 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1192 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1193
1194 /* Apply bus translation */
1195 if (of_translate_one(blob, node_offset, bus, pbus,
1196 addr, na, ns, pna, rprop))
1197 break;
1198
1199 /* Complete the move up one level */
1200 na = pna;
1201 ns = pns;
1202 bus = pbus;
1203
1204 of_dump_addr("OF: one level translation:", addr, na);
1205 }
1206 bail:
1207
1208 return result;
1209}
1210
Stephen Warren11e44fc2016-08-05 09:47:50 -06001211u64 fdt_translate_address(const void *blob, int node_offset,
1212 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001213{
1214 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1215}
Kumar Gala75e73af2010-07-04 12:48:21 -05001216
1217/**
1218 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1219 * who's reg property matches a physical cpu address
1220 *
1221 * @blob: ptr to device tree
1222 * @compat: compatiable string to match
1223 * @compat_off: property name
1224 *
1225 */
1226int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1227 phys_addr_t compat_off)
1228{
1229 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1230 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001231 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001232 if (reg) {
1233 if (compat_off == fdt_translate_address(blob, off, reg))
1234 return off;
1235 }
1236 off = fdt_node_offset_by_compatible(blob, off, compat);
1237 }
1238
1239 return -FDT_ERR_NOTFOUND;
1240}
1241
Kumar Galab4b847e2010-07-09 16:18:58 -05001242/**
1243 * fdt_alloc_phandle: Return next free phandle value
1244 *
1245 * @blob: ptr to device tree
1246 */
1247int fdt_alloc_phandle(void *blob)
1248{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001249 int offset;
1250 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001251
Kumar Galab4b847e2010-07-09 16:18:58 -05001252 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1253 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001254 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001255 }
1256
1257 return phandle + 1;
1258}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001259
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001260/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001261 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001262 *
1263 * @fdt: ptr to device tree
1264 * @nodeoffset: node to update
1265 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001266 */
1267int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001268{
1269 int ret;
1270
1271#ifdef DEBUG
1272 int off = fdt_node_offset_by_phandle(fdt, phandle);
1273
1274 if ((off >= 0) && (off != nodeoffset)) {
1275 char buf[64];
1276
1277 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1278 printf("Trying to update node %s with phandle %u ",
1279 buf, phandle);
1280
1281 fdt_get_path(fdt, off, buf, sizeof(buf));
1282 printf("that already exists in node %s.\n", buf);
1283 return -FDT_ERR_BADPHANDLE;
1284 }
1285#endif
1286
1287 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1288 if (ret < 0)
1289 return ret;
1290
1291 /*
1292 * For now, also set the deprecated "linux,phandle" property, so that we
1293 * don't break older kernels.
1294 */
1295 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1296
1297 return ret;
1298}
1299
Kumar Gala10aeabd2011-08-01 00:25:20 -05001300/*
1301 * fdt_create_phandle: Create a phandle property for the given node
1302 *
1303 * @fdt: ptr to device tree
1304 * @nodeoffset: node to update
1305 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001306unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001307{
1308 /* see if there is a phandle already */
1309 int phandle = fdt_get_phandle(fdt, nodeoffset);
1310
1311 /* if we got 0, means no phandle so create one */
1312 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001313 int ret;
1314
Kumar Gala10aeabd2011-08-01 00:25:20 -05001315 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001316 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1317 if (ret < 0) {
1318 printf("Can't set phandle %u: %s\n", phandle,
1319 fdt_strerror(ret));
1320 return 0;
1321 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001322 }
1323
1324 return phandle;
1325}
1326
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001327/*
1328 * fdt_set_node_status: Set status for the given node
1329 *
1330 * @fdt: ptr to device tree
1331 * @nodeoffset: node to update
1332 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1333 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1334 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1335 */
1336int fdt_set_node_status(void *fdt, int nodeoffset,
1337 enum fdt_status status, unsigned int error_code)
1338{
1339 char buf[16];
1340 int ret = 0;
1341
1342 if (nodeoffset < 0)
1343 return nodeoffset;
1344
1345 switch (status) {
1346 case FDT_STATUS_OKAY:
1347 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1348 break;
1349 case FDT_STATUS_DISABLED:
1350 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1351 break;
1352 case FDT_STATUS_FAIL:
1353 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1354 break;
1355 case FDT_STATUS_FAIL_ERROR_CODE:
1356 sprintf(buf, "fail-%d", error_code);
1357 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1358 break;
1359 default:
1360 printf("Invalid fdt status: %x\n", status);
1361 ret = -1;
1362 break;
1363 }
1364
1365 return ret;
1366}
1367
1368/*
1369 * fdt_set_status_by_alias: Set status for the given node given an alias
1370 *
1371 * @fdt: ptr to device tree
1372 * @alias: alias of node to update
1373 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1374 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1375 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1376 */
1377int fdt_set_status_by_alias(void *fdt, const char* alias,
1378 enum fdt_status status, unsigned int error_code)
1379{
1380 int offset = fdt_path_offset(fdt, alias);
1381
1382 return fdt_set_node_status(fdt, offset, status, error_code);
1383}
1384
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001385#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001386int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1387{
1388 int noff;
1389 int ret;
1390
1391 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1392 if (noff != -FDT_ERR_NOTFOUND) {
1393 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1394add_edid:
1395 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1396 if (ret == -FDT_ERR_NOSPACE) {
1397 ret = fdt_increase_size(blob, 512);
1398 if (!ret)
1399 goto add_edid;
1400 else
1401 goto err_size;
1402 } else if (ret < 0) {
1403 printf("Can't add property: %s\n", fdt_strerror(ret));
1404 return ret;
1405 }
1406 }
1407 return 0;
1408err_size:
1409 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1410 return ret;
1411}
1412#endif
Timur Tabibb682002011-05-03 13:24:07 -05001413
1414/*
1415 * Verify the physical address of device tree node for a given alias
1416 *
1417 * This function locates the device tree node of a given alias, and then
1418 * verifies that the physical address of that device matches the given
1419 * parameter. It displays a message if there is a mismatch.
1420 *
1421 * Returns 1 on success, 0 on failure
1422 */
1423int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1424{
1425 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001426 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001427 int node, len;
1428 u64 dt_addr;
1429
1430 path = fdt_getprop(fdt, anode, alias, NULL);
1431 if (!path) {
1432 /* If there's no such alias, then it's not a failure */
1433 return 1;
1434 }
1435
1436 node = fdt_path_offset(fdt, path);
1437 if (node < 0) {
1438 printf("Warning: device tree alias '%s' points to invalid "
1439 "node %s.\n", alias, path);
1440 return 0;
1441 }
1442
1443 reg = fdt_getprop(fdt, node, "reg", &len);
1444 if (!reg) {
1445 printf("Warning: device tree node '%s' has no address.\n",
1446 path);
1447 return 0;
1448 }
1449
1450 dt_addr = fdt_translate_address(fdt, node, reg);
1451 if (addr != dt_addr) {
Simon Glasse48f3742014-11-11 12:47:07 -07001452 printf("Warning: U-Boot configured device %s at address %"
1453 PRIx64 ",\n but the device tree has it address %"
1454 PRIx64 ".\n", alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001455 return 0;
1456 }
1457
1458 return 1;
1459}
1460
1461/*
1462 * Returns the base address of an SOC or PCI node
1463 */
Simon Glassec002112017-05-18 20:09:00 -06001464u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001465{
1466 int size;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001467 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001468
Simon Glass336a4482017-07-04 13:31:20 -06001469 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabibb682002011-05-03 13:24:07 -05001470
Simon Glass336a4482017-07-04 13:31:20 -06001471 return prop ? fdt_translate_address(fdt, node, prop) : 0;
Timur Tabibb682002011-05-03 13:24:07 -05001472}
Alexander Grafc48e6862014-04-11 17:09:41 +02001473
1474/*
1475 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1476 */
1477static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1478 uint64_t *val, int cells)
1479{
1480 const fdt32_t *prop32 = &prop[cell_off];
1481 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1482
1483 if ((cell_off + cells) > prop_len)
1484 return -FDT_ERR_NOSPACE;
1485
1486 switch (cells) {
1487 case 1:
1488 *val = fdt32_to_cpu(*prop32);
1489 break;
1490 case 2:
1491 *val = fdt64_to_cpu(*prop64);
1492 break;
1493 default:
1494 return -FDT_ERR_NOSPACE;
1495 }
1496
1497 return 0;
1498}
1499
1500/**
1501 * fdt_read_range - Read a node's n'th range property
1502 *
1503 * @fdt: ptr to device tree
1504 * @node: offset of node
1505 * @n: range index
1506 * @child_addr: pointer to storage for the "child address" field
1507 * @addr: pointer to storage for the CPU view translated physical start
1508 * @len: pointer to storage for the range length
1509 *
1510 * Convenience function that reads and interprets a specific range out of
1511 * a number of the "ranges" property array.
1512 */
1513int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1514 uint64_t *addr, uint64_t *len)
1515{
1516 int pnode = fdt_parent_offset(fdt, node);
1517 const fdt32_t *ranges;
1518 int pacells;
1519 int acells;
1520 int scells;
1521 int ranges_len;
1522 int cell = 0;
1523 int r = 0;
1524
1525 /*
1526 * The "ranges" property is an array of
1527 * { <child address> <parent address> <size in child address space> }
1528 *
1529 * All 3 elements can span a diffent number of cells. Fetch their size.
1530 */
1531 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1532 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1533 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1534
1535 /* Now try to get the ranges property */
1536 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1537 if (!ranges)
1538 return -FDT_ERR_NOTFOUND;
1539 ranges_len /= sizeof(uint32_t);
1540
1541 /* Jump to the n'th entry */
1542 cell = n * (pacells + acells + scells);
1543
1544 /* Read <child address> */
1545 if (child_addr) {
1546 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1547 acells);
1548 if (r)
1549 return r;
1550 }
1551 cell += acells;
1552
1553 /* Read <parent address> */
1554 if (addr)
1555 *addr = fdt_translate_address(fdt, node, ranges + cell);
1556 cell += pacells;
1557
1558 /* Read <size in child address space> */
1559 if (len) {
1560 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1561 if (r)
1562 return r;
1563 }
1564
1565 return 0;
1566}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001567
1568/**
1569 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1570 *
1571 * @fdt: ptr to device tree
1572 * @node: offset of the simplefb node
1573 * @base_address: framebuffer base address
1574 * @width: width in pixels
1575 * @height: height in pixels
1576 * @stride: bytes per line
1577 * @format: pixel format string
1578 *
1579 * Convenience function to fill and enable a simplefb node.
1580 */
1581int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1582 u32 height, u32 stride, const char *format)
1583{
1584 char name[32];
1585 fdt32_t cells[4];
1586 int i, addrc, sizec, ret;
1587
Simon Glasseed36602017-05-18 20:09:26 -06001588 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1589 &addrc, &sizec);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001590 i = 0;
1591 if (addrc == 2)
1592 cells[i++] = cpu_to_fdt32(base_address >> 32);
1593 cells[i++] = cpu_to_fdt32(base_address);
1594 if (sizec == 2)
1595 cells[i++] = 0;
1596 cells[i++] = cpu_to_fdt32(height * stride);
1597
1598 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1599 if (ret < 0)
1600 return ret;
1601
Simon Glassc3ec6462015-04-20 12:37:16 -06001602 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001603 ret = fdt_set_name(fdt, node, name);
1604 if (ret < 0)
1605 return ret;
1606
1607 ret = fdt_setprop_u32(fdt, node, "width", width);
1608 if (ret < 0)
1609 return ret;
1610
1611 ret = fdt_setprop_u32(fdt, node, "height", height);
1612 if (ret < 0)
1613 return ret;
1614
1615 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1616 if (ret < 0)
1617 return ret;
1618
1619 ret = fdt_setprop_string(fdt, node, "format", format);
1620 if (ret < 0)
1621 return ret;
1622
1623 ret = fdt_setprop_string(fdt, node, "status", "okay");
1624 if (ret < 0)
1625 return ret;
1626
1627 return 0;
1628}
Tim Harvey08daa252015-04-08 11:45:39 -07001629
1630/*
1631 * Update native-mode in display-timings from display environment variable.
1632 * The node to update are specified by path.
1633 */
1634int fdt_fixup_display(void *blob, const char *path, const char *display)
1635{
1636 int off, toff;
1637
1638 if (!display || !path)
1639 return -FDT_ERR_NOTFOUND;
1640
1641 toff = fdt_path_offset(blob, path);
1642 if (toff >= 0)
1643 toff = fdt_subnode_offset(blob, toff, "display-timings");
1644 if (toff < 0)
1645 return toff;
1646
1647 for (off = fdt_first_subnode(blob, toff);
1648 off >= 0;
1649 off = fdt_next_subnode(blob, off)) {
1650 uint32_t h = fdt_get_phandle(blob, off);
1651 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1652 fdt32_to_cpu(h));
1653 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1654 return fdt_setprop_u32(blob, toff, "native-mode", h);
1655 }
1656 return toff;
1657}
Pantelis Antonioufc7c3182017-09-04 23:12:11 +03001658
1659#ifdef CONFIG_OF_LIBFDT_OVERLAY
1660/**
1661 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1662 *
1663 * @fdt: ptr to device tree
1664 * @fdto: ptr to device tree overlay
1665 *
1666 * Convenience function to apply an overlay and display helpful messages
1667 * in the case of an error
1668 */
1669int fdt_overlay_apply_verbose(void *fdt, void *fdto)
1670{
1671 int err;
1672 bool has_symbols;
1673
1674 err = fdt_path_offset(fdt, "/__symbols__");
1675 has_symbols = err >= 0;
1676
1677 err = fdt_overlay_apply(fdt, fdto);
1678 if (err < 0) {
1679 printf("failed on fdt_overlay_apply(): %s\n",
1680 fdt_strerror(err));
1681 if (!has_symbols) {
1682 printf("base fdt does did not have a /__symbols__ node\n");
1683 printf("make sure you've compiled with -@\n");
1684 }
1685 }
1686 return err;
1687}
1688#endif