blob: ced119e70d9f1010b5f6945d1e44e3d5c719dd44 [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
200 serial = getenv("serial#");
201 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
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400292 str = getenv("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 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
Doug Anderson5e574542013-04-30 10:22:00 +0000412#ifdef CONFIG_NR_DRAM_BANKS
413#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
414#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000415#define MEMORY_BANKS_MAX 4
Doug Anderson5e574542013-04-30 10:22:00 +0000416#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;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900420 int len;
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
Andre Przywara5c1cf892015-06-21 00:29:54 +0100449 if (!banks)
450 return 0;
451
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900452 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600453
454 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
455 if (err < 0) {
456 printf("WARNING: could not set %s %s.\n",
457 "reg", fdt_strerror(err));
458 return err;
459 }
460 return 0;
461}
462
John Rigbya6bd9e82010-10-13 13:57:33 -0600463int fdt_fixup_memory(void *blob, u64 start, u64 size)
464{
465 return fdt_fixup_memory_banks(blob, &start, &size, 1);
466}
467
Kumar Galaba37aa02008-08-19 15:41:18 -0500468void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600469{
Kumar Galaba37aa02008-08-19 15:41:18 -0500470 int node, i, j;
Bin Mengbc393a72015-11-03 04:24:41 -0800471 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000472 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600473 const char *path;
Kumar Galaba37aa02008-08-19 15:41:18 -0500474 unsigned char mac_addr[6];
Bin Mengbc393a72015-11-03 04:24:41 -0800475 int offset;
Kumar Galaab544632007-11-21 11:11:03 -0600476
477 node = fdt_path_offset(fdt, "/aliases");
Kumar Galaba37aa02008-08-19 15:41:18 -0500478 if (node < 0)
479 return;
480
Bin Mengbc393a72015-11-03 04:24:41 -0800481 for (offset = fdt_first_property_offset(fdt, node);
482 offset > 0;
483 offset = fdt_next_property_offset(fdt, offset)) {
484 const char *name;
485 int len = strlen("ethernet");
486
487 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
488 if (!strncmp(name, "ethernet", len)) {
489 i = trailing_strtol(name);
490 if (i != -1) {
491 if (i == 0)
492 strcpy(mac, "ethaddr");
493 else
494 sprintf(mac, "eth%daddr", i);
495 } else {
496 continue;
497 }
498 tmp = getenv(mac);
499 if (!tmp)
500 continue;
501
502 for (j = 0; j < 6; j++) {
503 mac_addr[j] = tmp ?
504 simple_strtoul(tmp, &end, 16) : 0;
505 if (tmp)
506 tmp = (*end) ? end + 1 : end;
507 }
508
509 do_fixup_by_path(fdt, path, "mac-address",
510 &mac_addr, 6, 0);
511 do_fixup_by_path(fdt, path, "local-mac-address",
512 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500513 }
Kumar Galaab544632007-11-21 11:11:03 -0600514 }
515}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300516
Kumar Gala3082d232008-08-15 08:24:42 -0500517/* Resize the fdt to its actual size + a bit of padding */
Simon Glass5bf58cc2014-07-30 03:59:02 -0600518int fdt_shrink_to_minimum(void *blob)
Kumar Gala3082d232008-08-15 08:24:42 -0500519{
520 int i;
521 uint64_t addr, size;
522 int total, ret;
523 uint actualsize;
524
525 if (!blob)
526 return 0;
527
528 total = fdt_num_mem_rsv(blob);
529 for (i = 0; i < total; i++) {
530 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000531 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500532 fdt_del_mem_rsv(blob, i);
533 break;
534 }
535 }
536
Peter Korsgaardf242a082008-10-28 08:26:52 +0100537 /*
538 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200539 * plus the size needed for 5 fdt_add_mem_rsv, one
540 * for the fdt itself and 4 for a possible initrd
541 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100542 */
Kumar Gala3082d232008-08-15 08:24:42 -0500543 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200544 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500545
546 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000547 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
548 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500549
550 /* Change the fdt header to reflect the correct size */
551 fdt_set_totalsize(blob, actualsize);
552
553 /* Add the new reservation */
Simon Glass92549352011-09-17 06:48:58 +0000554 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500555 if (ret < 0)
556 return ret;
557
558 return actualsize;
559}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500560
561#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500562#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500563
564#define FDT_PCI_PREFETCH (0x40000000)
565#define FDT_PCI_MEM32 (0x02000000)
566#define FDT_PCI_IO (0x01000000)
567#define FDT_PCI_MEM64 (0x03000000)
568
569int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
570
571 int addrcell, sizecell, len, r;
572 u32 *dma_range;
573 /* sized based on pci addr cells, size-cells, & address-cells */
574 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
575
576 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
577 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
578
579 dma_range = &dma_ranges[0];
580 for (r = 0; r < hose->region_count; r++) {
581 u64 bus_start, phys_start, size;
582
Kumar Galaff4e66e2009-02-06 09:49:31 -0600583 /* skip if !PCI_REGION_SYS_MEMORY */
584 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500585 continue;
586
587 bus_start = (u64)hose->regions[r].bus_start;
588 phys_start = (u64)hose->regions[r].phys_start;
589 size = (u64)hose->regions[r].size;
590
591 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500592 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500593 dma_range[0] |= FDT_PCI_MEM64;
594 else
595 dma_range[0] |= FDT_PCI_MEM32;
596 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
597 dma_range[0] |= FDT_PCI_PREFETCH;
598#ifdef CONFIG_SYS_PCI_64BIT
599 dma_range[1] = bus_start >> 32;
600#else
601 dma_range[1] = 0;
602#endif
603 dma_range[2] = bus_start & 0xffffffff;
604
605 if (addrcell == 2) {
606 dma_range[3] = phys_start >> 32;
607 dma_range[4] = phys_start & 0xffffffff;
608 } else {
609 dma_range[3] = phys_start & 0xffffffff;
610 }
611
612 if (sizecell == 2) {
613 dma_range[3 + addrcell + 0] = size >> 32;
614 dma_range[3 + addrcell + 1] = size & 0xffffffff;
615 } else {
616 dma_range[3 + addrcell + 0] = size & 0xffffffff;
617 }
618
619 dma_range += (3 + addrcell + sizecell);
620 }
621
622 len = dma_range - &dma_ranges[0];
623 if (len)
624 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
625
626 return 0;
627}
628#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200629
630#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
631/*
Stefan Roese8a805df2010-09-16 14:01:53 +0200632 * Provide a weak default function to return the flash bank size.
633 * There might be multiple non-identical flash chips connected to one
634 * chip-select, so we need to pass an index as well.
635 */
636u32 __flash_get_bank_size(int cs, int idx)
637{
638 extern flash_info_t flash_info[];
639
640 /*
641 * As default, a simple 1:1 mapping is provided. Boards with
642 * a different mapping need to supply a board specific mapping
643 * routine.
644 */
645 return flash_info[cs].size;
646}
647u32 flash_get_bank_size(int cs, int idx)
648 __attribute__((weak, alias("__flash_get_bank_size")));
649
650/*
Stefan Roese30d45c02009-10-21 11:59:52 +0200651 * This function can be used to update the size in the "reg" property
Stefan Roese8a805df2010-09-16 14:01:53 +0200652 * of all NOR FLASH device nodes. This is necessary for boards with
Stefan Roese30d45c02009-10-21 11:59:52 +0200653 * non-fixed NOR FLASH sizes.
654 */
Stefan Roese8a805df2010-09-16 14:01:53 +0200655int fdt_fixup_nor_flash_size(void *blob)
Stefan Roese30d45c02009-10-21 11:59:52 +0200656{
657 char compat[][16] = { "cfi-flash", "jedec-flash" };
658 int off;
659 int len;
660 struct fdt_property *prop;
Stefan Roese2778a012010-09-24 13:51:50 +0200661 u32 *reg, *reg2;
Stefan Roese30d45c02009-10-21 11:59:52 +0200662 int i;
663
664 for (i = 0; i < 2; i++) {
665 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
666 while (off != -FDT_ERR_NOTFOUND) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200667 int idx;
668
Stefan Roese30d45c02009-10-21 11:59:52 +0200669 /*
Stefan Roese8a805df2010-09-16 14:01:53 +0200670 * Found one compatible node, so fixup the size
671 * int its reg properties
Stefan Roese30d45c02009-10-21 11:59:52 +0200672 */
673 prop = fdt_get_property_w(blob, off, "reg", &len);
674 if (prop) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200675 int tuple_size = 3 * sizeof(reg);
Stefan Roese30d45c02009-10-21 11:59:52 +0200676
Stefan Roese8a805df2010-09-16 14:01:53 +0200677 /*
678 * There might be multiple reg-tuples,
679 * so loop through them all
680 */
Stefan Roese2778a012010-09-24 13:51:50 +0200681 reg = reg2 = (u32 *)&prop->data[0];
682 for (idx = 0; idx < (len / tuple_size); idx++) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200683 /*
684 * Update size in reg property
685 */
686 reg[2] = flash_get_bank_size(reg[0],
687 idx);
Stefan Roese2778a012010-09-24 13:51:50 +0200688
689 /*
690 * Point to next reg tuple
691 */
692 reg += 3;
Stefan Roese30d45c02009-10-21 11:59:52 +0200693 }
Stefan Roese2778a012010-09-24 13:51:50 +0200694
695 fdt_setprop(blob, off, "reg", reg2, len);
Stefan Roese30d45c02009-10-21 11:59:52 +0200696 }
697
698 /* Move to next compatible node */
699 off = fdt_node_offset_by_compatible(blob, off,
700 compat[i]);
701 }
702 }
703
Stefan Roese8a805df2010-09-16 14:01:53 +0200704 return 0;
Stefan Roese30d45c02009-10-21 11:59:52 +0200705}
706#endif
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100707
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200708int fdt_increase_size(void *fdt, int add_len)
709{
710 int newlen;
711
712 newlen = fdt_totalsize(fdt) + add_len;
713
714 /* Open in place with a new len */
715 return fdt_open_into(fdt, fdt, newlen);
716}
717
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100718#ifdef CONFIG_FDT_FIXUP_PARTITIONS
719#include <jffs2/load_kernel.h>
720#include <mtd_node.h>
721
722struct reg_cell {
723 unsigned int r0;
724 unsigned int r1;
725};
726
727int fdt_del_subnodes(const void *blob, int parent_offset)
728{
729 int off, ndepth;
730 int ret;
731
732 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
733 (off >= 0) && (ndepth > 0);
734 off = fdt_next_node(blob, off, &ndepth)) {
735 if (ndepth == 1) {
736 debug("delete %s: offset: %x\n",
737 fdt_get_name(blob, off, 0), off);
738 ret = fdt_del_node((void *)blob, off);
739 if (ret < 0) {
740 printf("Can't delete node: %s\n",
741 fdt_strerror(ret));
742 return ret;
743 } else {
744 ndepth = 0;
745 off = parent_offset;
746 }
747 }
748 }
749 return 0;
750}
751
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100752int fdt_del_partitions(void *blob, int parent_offset)
753{
754 const void *prop;
755 int ndepth = 0;
756 int off;
757 int ret;
758
759 off = fdt_next_node(blob, parent_offset, &ndepth);
760 if (off > 0 && ndepth == 1) {
761 prop = fdt_getprop(blob, off, "label", NULL);
762 if (prop == NULL) {
763 /*
764 * Could not find label property, nand {}; node?
765 * Check subnode, delete partitions there if any.
766 */
767 return fdt_del_partitions(blob, off);
768 } else {
769 ret = fdt_del_subnodes(blob, parent_offset);
770 if (ret < 0) {
771 printf("Can't remove subnodes: %s\n",
772 fdt_strerror(ret));
773 return ret;
774 }
775 }
776 }
777 return 0;
778}
779
780int fdt_node_set_part_info(void *blob, int parent_offset,
781 struct mtd_device *dev)
782{
783 struct list_head *pentry;
784 struct part_info *part;
785 struct reg_cell cell;
786 int off, ndepth = 0;
787 int part_num, ret;
788 char buf[64];
789
790 ret = fdt_del_partitions(blob, parent_offset);
791 if (ret < 0)
792 return ret;
793
794 /*
795 * Check if it is nand {}; subnode, adjust
796 * the offset in this case
797 */
798 off = fdt_next_node(blob, parent_offset, &ndepth);
799 if (off > 0 && ndepth == 1)
800 parent_offset = off;
801
802 part_num = 0;
803 list_for_each_prev(pentry, &dev->parts) {
804 int newoff;
805
806 part = list_entry(pentry, struct part_info, link);
807
Scott Wood06503f12013-10-15 17:41:27 -0500808 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100809 part_num, part->name, part->size,
810 part->offset, part->mask_flags);
811
Scott Wood06503f12013-10-15 17:41:27 -0500812 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100813add_sub:
814 ret = fdt_add_subnode(blob, parent_offset, buf);
815 if (ret == -FDT_ERR_NOSPACE) {
816 ret = fdt_increase_size(blob, 512);
817 if (!ret)
818 goto add_sub;
819 else
820 goto err_size;
821 } else if (ret < 0) {
822 printf("Can't add partition node: %s\n",
823 fdt_strerror(ret));
824 return ret;
825 }
826 newoff = ret;
827
828 /* Check MTD_WRITEABLE_CMD flag */
829 if (part->mask_flags & 1) {
830add_ro:
831 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
832 if (ret == -FDT_ERR_NOSPACE) {
833 ret = fdt_increase_size(blob, 512);
834 if (!ret)
835 goto add_ro;
836 else
837 goto err_size;
838 } else if (ret < 0)
839 goto err_prop;
840 }
841
842 cell.r0 = cpu_to_fdt32(part->offset);
843 cell.r1 = cpu_to_fdt32(part->size);
844add_reg:
845 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
846 if (ret == -FDT_ERR_NOSPACE) {
847 ret = fdt_increase_size(blob, 512);
848 if (!ret)
849 goto add_reg;
850 else
851 goto err_size;
852 } else if (ret < 0)
853 goto err_prop;
854
855add_label:
856 ret = fdt_setprop_string(blob, newoff, "label", part->name);
857 if (ret == -FDT_ERR_NOSPACE) {
858 ret = fdt_increase_size(blob, 512);
859 if (!ret)
860 goto add_label;
861 else
862 goto err_size;
863 } else if (ret < 0)
864 goto err_prop;
865
866 part_num++;
867 }
868 return 0;
869err_size:
870 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
871 return ret;
872err_prop:
873 printf("Can't add property: %s\n", fdt_strerror(ret));
874 return ret;
875}
876
877/*
878 * Update partitions in nor/nand nodes using info from
879 * mtdparts environment variable. The nodes to update are
880 * specified by node_info structure which contains mtd device
881 * type and compatible string: E. g. the board code in
882 * ft_board_setup() could use:
883 *
884 * struct node_info nodes[] = {
885 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
886 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
887 * };
888 *
889 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
890 */
891void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
892{
893 struct node_info *ni = node_info;
894 struct mtd_device *dev;
895 char *parts;
896 int i, idx;
897 int noff;
898
899 parts = getenv("mtdparts");
900 if (!parts)
901 return;
902
903 if (mtdparts_init() != 0)
904 return;
905
906 for (i = 0; i < node_info_size; i++) {
907 idx = 0;
908 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
909 while (noff != -FDT_ERR_NOTFOUND) {
910 debug("%s: %s, mtd dev type %d\n",
911 fdt_get_name(blob, noff, 0),
912 ni[i].compat, ni[i].type);
913 dev = device_find(ni[i].type, idx++);
914 if (dev) {
915 if (fdt_node_set_part_info(blob, noff, dev))
916 return; /* return on error */
917 }
918
919 /* Jump to next flash node */
920 noff = fdt_node_offset_by_compatible(blob, noff,
921 ni[i].compat);
922 }
923 }
924}
925#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500926
927void fdt_del_node_and_alias(void *blob, const char *alias)
928{
929 int off = fdt_path_offset(blob, alias);
930
931 if (off < 0)
932 return;
933
934 fdt_del_node(blob, off);
935
936 off = fdt_path_offset(blob, "/aliases");
937 fdt_delprop(blob, off, alias);
938}
Kumar Galaa0342c02010-06-16 14:27:38 -0500939
Kumar Galaa0342c02010-06-16 14:27:38 -0500940/* Max address size we deal with */
941#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800942#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100943#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
944 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500945
946/* Debug utility */
947#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000948static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500949{
950 printf("%s", s);
951 while(na--)
952 printf(" %08x", *(addr++));
953 printf("\n");
954}
955#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000956static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500957#endif
958
959/* Callbacks for bus specific translators */
960struct of_bus {
961 const char *name;
962 const char *addresses;
Scott Wood6395f312010-08-12 18:37:39 -0500963 void (*count_cells)(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500964 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000965 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500966 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000967 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500968};
969
970/* Default translator (generic bus) */
Arnab Basuf43b4352014-09-08 12:19:59 -0700971void of_bus_default_count_cells(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500972 int *addrc, int *sizec)
973{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000974 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -0500975
Simon Glass933cdbb2014-10-23 18:58:57 -0600976 if (addrc)
977 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -0500978
979 if (sizec) {
980 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
981 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000982 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500983 else
984 *sizec = 1;
985 }
Kumar Galaa0342c02010-06-16 14:27:38 -0500986}
987
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000988static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500989 int na, int ns, int pna)
990{
991 u64 cp, s, da;
992
993 cp = of_read_number(range, na);
994 s = of_read_number(range + na + pna, ns);
995 da = of_read_number(addr, na);
996
Simon Glasse48f3742014-11-11 12:47:07 -0700997 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
998 ", da=%" PRIu64 "\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -0500999
1000 if (da < cp || da >= (cp + s))
1001 return OF_BAD_ADDR;
1002 return da - cp;
1003}
1004
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001005static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001006{
1007 u64 a = of_read_number(addr, na);
1008 memset(addr, 0, na * 4);
1009 a += offset;
1010 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001011 addr[na - 2] = cpu_to_fdt32(a >> 32);
1012 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001013
1014 return 0;
1015}
1016
1017/* Array of bus specific translators */
1018static struct of_bus of_busses[] = {
1019 /* Default */
1020 {
1021 .name = "default",
1022 .addresses = "reg",
1023 .count_cells = of_bus_default_count_cells,
1024 .map = of_bus_default_map,
1025 .translate = of_bus_default_translate,
1026 },
1027};
1028
1029static int of_translate_one(void * blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001030 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001031 int na, int ns, int pna, const char *rprop)
1032{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001033 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001034 int rlen;
1035 int rone;
1036 u64 offset = OF_BAD_ADDR;
1037
1038 /* Normally, an absence of a "ranges" property means we are
1039 * crossing a non-translatable boundary, and thus the addresses
1040 * below the current not cannot be converted to CPU physical ones.
1041 * Unfortunately, while this is very clear in the spec, it's not
1042 * what Apple understood, and they do have things like /uni-n or
1043 * /ht nodes with no "ranges" property and a lot of perfectly
1044 * useable mapped devices below them. Thus we treat the absence of
1045 * "ranges" as equivalent to an empty "ranges" property which means
1046 * a 1:1 translation at that level. It's up to the caller not to try
1047 * to translate addresses that aren't supposed to be translated in
1048 * the first place. --BenH.
1049 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001050 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001051 if (ranges == NULL || rlen == 0) {
1052 offset = of_read_number(addr, na);
1053 memset(addr, 0, pna * 4);
1054 debug("OF: no ranges, 1:1 translation\n");
1055 goto finish;
1056 }
1057
1058 debug("OF: walking ranges...\n");
1059
1060 /* Now walk through the ranges */
1061 rlen /= 4;
1062 rone = na + pna + ns;
1063 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1064 offset = bus->map(addr, ranges, na, ns, pna);
1065 if (offset != OF_BAD_ADDR)
1066 break;
1067 }
1068 if (offset == OF_BAD_ADDR) {
1069 debug("OF: not found !\n");
1070 return 1;
1071 }
1072 memcpy(addr, ranges + na, 4 * pna);
1073
1074 finish:
1075 of_dump_addr("OF: parent translation for:", addr, pna);
Simon Glasse48f3742014-11-11 12:47:07 -07001076 debug("OF: with offset: %" PRIu64 "\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001077
1078 /* Translate it into parent bus space */
1079 return pbus->translate(addr, offset, pna);
1080}
1081
1082/*
1083 * Translate an address from the device-tree into a CPU physical address,
1084 * this walks up the tree and applies the various bus mappings on the
1085 * way.
1086 *
1087 * Note: We consider that crossing any level with #size-cells == 0 to mean
1088 * that translation is impossible (that is we are not dealing with a value
1089 * that can be mapped to a cpu physical address). This is not really specified
1090 * that way, but this is traditionally the way IBM at least do things
1091 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001092static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1093 const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001094{
1095 int parent;
1096 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001097 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001098 int na, ns, pna, pns;
1099 u64 result = OF_BAD_ADDR;
1100
1101 debug("OF: ** translation for device %s **\n",
1102 fdt_get_name(blob, node_offset, NULL));
1103
1104 /* Get parent & match bus type */
1105 parent = fdt_parent_offset(blob, node_offset);
1106 if (parent < 0)
1107 goto bail;
1108 bus = &of_busses[0];
1109
1110 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001111 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001112 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001113 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1114 fdt_get_name(blob, node_offset, NULL));
1115 goto bail;
1116 }
1117 memcpy(addr, in_addr, na * 4);
1118
1119 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1120 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1121 of_dump_addr("OF: translating address:", addr, na);
1122
1123 /* Translate */
1124 for (;;) {
1125 /* Switch to parent bus */
1126 node_offset = parent;
1127 parent = fdt_parent_offset(blob, node_offset);
1128
1129 /* If root, we have finished */
1130 if (parent < 0) {
1131 debug("OF: reached root node\n");
1132 result = of_read_number(addr, na);
1133 break;
1134 }
1135
1136 /* Get new parent bus and counts */
1137 pbus = &of_busses[0];
Scott Wood6395f312010-08-12 18:37:39 -05001138 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001139 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001140 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1141 fdt_get_name(blob, node_offset, NULL));
1142 break;
1143 }
1144
1145 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1146 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1147
1148 /* Apply bus translation */
1149 if (of_translate_one(blob, node_offset, bus, pbus,
1150 addr, na, ns, pna, rprop))
1151 break;
1152
1153 /* Complete the move up one level */
1154 na = pna;
1155 ns = pns;
1156 bus = pbus;
1157
1158 of_dump_addr("OF: one level translation:", addr, na);
1159 }
1160 bail:
1161
1162 return result;
1163}
1164
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001165u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001166{
1167 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1168}
Kumar Gala75e73af2010-07-04 12:48:21 -05001169
1170/**
1171 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1172 * who's reg property matches a physical cpu address
1173 *
1174 * @blob: ptr to device tree
1175 * @compat: compatiable string to match
1176 * @compat_off: property name
1177 *
1178 */
1179int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1180 phys_addr_t compat_off)
1181{
1182 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1183 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001184 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001185 if (reg) {
1186 if (compat_off == fdt_translate_address(blob, off, reg))
1187 return off;
1188 }
1189 off = fdt_node_offset_by_compatible(blob, off, compat);
1190 }
1191
1192 return -FDT_ERR_NOTFOUND;
1193}
1194
Kumar Galab4b847e2010-07-09 16:18:58 -05001195/**
1196 * fdt_alloc_phandle: Return next free phandle value
1197 *
1198 * @blob: ptr to device tree
1199 */
1200int fdt_alloc_phandle(void *blob)
1201{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001202 int offset;
1203 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001204
Kumar Galab4b847e2010-07-09 16:18:58 -05001205 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1206 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001207 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001208 }
1209
1210 return phandle + 1;
1211}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001212
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001213/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001214 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001215 *
1216 * @fdt: ptr to device tree
1217 * @nodeoffset: node to update
1218 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001219 */
1220int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001221{
1222 int ret;
1223
1224#ifdef DEBUG
1225 int off = fdt_node_offset_by_phandle(fdt, phandle);
1226
1227 if ((off >= 0) && (off != nodeoffset)) {
1228 char buf[64];
1229
1230 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1231 printf("Trying to update node %s with phandle %u ",
1232 buf, phandle);
1233
1234 fdt_get_path(fdt, off, buf, sizeof(buf));
1235 printf("that already exists in node %s.\n", buf);
1236 return -FDT_ERR_BADPHANDLE;
1237 }
1238#endif
1239
1240 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1241 if (ret < 0)
1242 return ret;
1243
1244 /*
1245 * For now, also set the deprecated "linux,phandle" property, so that we
1246 * don't break older kernels.
1247 */
1248 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1249
1250 return ret;
1251}
1252
Kumar Gala10aeabd2011-08-01 00:25:20 -05001253/*
1254 * fdt_create_phandle: Create a phandle property for the given node
1255 *
1256 * @fdt: ptr to device tree
1257 * @nodeoffset: node to update
1258 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001259unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001260{
1261 /* see if there is a phandle already */
1262 int phandle = fdt_get_phandle(fdt, nodeoffset);
1263
1264 /* if we got 0, means no phandle so create one */
1265 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001266 int ret;
1267
Kumar Gala10aeabd2011-08-01 00:25:20 -05001268 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001269 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1270 if (ret < 0) {
1271 printf("Can't set phandle %u: %s\n", phandle,
1272 fdt_strerror(ret));
1273 return 0;
1274 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001275 }
1276
1277 return phandle;
1278}
1279
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001280/*
1281 * fdt_set_node_status: Set status for the given node
1282 *
1283 * @fdt: ptr to device tree
1284 * @nodeoffset: node to update
1285 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1286 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1287 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1288 */
1289int fdt_set_node_status(void *fdt, int nodeoffset,
1290 enum fdt_status status, unsigned int error_code)
1291{
1292 char buf[16];
1293 int ret = 0;
1294
1295 if (nodeoffset < 0)
1296 return nodeoffset;
1297
1298 switch (status) {
1299 case FDT_STATUS_OKAY:
1300 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1301 break;
1302 case FDT_STATUS_DISABLED:
1303 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1304 break;
1305 case FDT_STATUS_FAIL:
1306 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1307 break;
1308 case FDT_STATUS_FAIL_ERROR_CODE:
1309 sprintf(buf, "fail-%d", error_code);
1310 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1311 break;
1312 default:
1313 printf("Invalid fdt status: %x\n", status);
1314 ret = -1;
1315 break;
1316 }
1317
1318 return ret;
1319}
1320
1321/*
1322 * fdt_set_status_by_alias: Set status for the given node given an alias
1323 *
1324 * @fdt: ptr to device tree
1325 * @alias: alias of node to update
1326 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1327 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1328 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1329 */
1330int fdt_set_status_by_alias(void *fdt, const char* alias,
1331 enum fdt_status status, unsigned int error_code)
1332{
1333 int offset = fdt_path_offset(fdt, alias);
1334
1335 return fdt_set_node_status(fdt, offset, status, error_code);
1336}
1337
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001338#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001339int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1340{
1341 int noff;
1342 int ret;
1343
1344 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1345 if (noff != -FDT_ERR_NOTFOUND) {
1346 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1347add_edid:
1348 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1349 if (ret == -FDT_ERR_NOSPACE) {
1350 ret = fdt_increase_size(blob, 512);
1351 if (!ret)
1352 goto add_edid;
1353 else
1354 goto err_size;
1355 } else if (ret < 0) {
1356 printf("Can't add property: %s\n", fdt_strerror(ret));
1357 return ret;
1358 }
1359 }
1360 return 0;
1361err_size:
1362 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1363 return ret;
1364}
1365#endif
Timur Tabibb682002011-05-03 13:24:07 -05001366
1367/*
1368 * Verify the physical address of device tree node for a given alias
1369 *
1370 * This function locates the device tree node of a given alias, and then
1371 * verifies that the physical address of that device matches the given
1372 * parameter. It displays a message if there is a mismatch.
1373 *
1374 * Returns 1 on success, 0 on failure
1375 */
1376int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1377{
1378 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001379 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001380 int node, len;
1381 u64 dt_addr;
1382
1383 path = fdt_getprop(fdt, anode, alias, NULL);
1384 if (!path) {
1385 /* If there's no such alias, then it's not a failure */
1386 return 1;
1387 }
1388
1389 node = fdt_path_offset(fdt, path);
1390 if (node < 0) {
1391 printf("Warning: device tree alias '%s' points to invalid "
1392 "node %s.\n", alias, path);
1393 return 0;
1394 }
1395
1396 reg = fdt_getprop(fdt, node, "reg", &len);
1397 if (!reg) {
1398 printf("Warning: device tree node '%s' has no address.\n",
1399 path);
1400 return 0;
1401 }
1402
1403 dt_addr = fdt_translate_address(fdt, node, reg);
1404 if (addr != dt_addr) {
Simon Glasse48f3742014-11-11 12:47:07 -07001405 printf("Warning: U-Boot configured device %s at address %"
1406 PRIx64 ",\n but the device tree has it address %"
1407 PRIx64 ".\n", alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001408 return 0;
1409 }
1410
1411 return 1;
1412}
1413
1414/*
1415 * Returns the base address of an SOC or PCI node
1416 */
1417u64 fdt_get_base_address(void *fdt, int node)
1418{
1419 int size;
1420 u32 naddr;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001421 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001422
Simon Glass933cdbb2014-10-23 18:58:57 -06001423 naddr = fdt_address_cells(fdt, node);
Timur Tabibb682002011-05-03 13:24:07 -05001424
1425 prop = fdt_getprop(fdt, node, "ranges", &size);
1426
1427 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1428}
Alexander Grafc48e6862014-04-11 17:09:41 +02001429
1430/*
1431 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1432 */
1433static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1434 uint64_t *val, int cells)
1435{
1436 const fdt32_t *prop32 = &prop[cell_off];
1437 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1438
1439 if ((cell_off + cells) > prop_len)
1440 return -FDT_ERR_NOSPACE;
1441
1442 switch (cells) {
1443 case 1:
1444 *val = fdt32_to_cpu(*prop32);
1445 break;
1446 case 2:
1447 *val = fdt64_to_cpu(*prop64);
1448 break;
1449 default:
1450 return -FDT_ERR_NOSPACE;
1451 }
1452
1453 return 0;
1454}
1455
1456/**
1457 * fdt_read_range - Read a node's n'th range property
1458 *
1459 * @fdt: ptr to device tree
1460 * @node: offset of node
1461 * @n: range index
1462 * @child_addr: pointer to storage for the "child address" field
1463 * @addr: pointer to storage for the CPU view translated physical start
1464 * @len: pointer to storage for the range length
1465 *
1466 * Convenience function that reads and interprets a specific range out of
1467 * a number of the "ranges" property array.
1468 */
1469int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1470 uint64_t *addr, uint64_t *len)
1471{
1472 int pnode = fdt_parent_offset(fdt, node);
1473 const fdt32_t *ranges;
1474 int pacells;
1475 int acells;
1476 int scells;
1477 int ranges_len;
1478 int cell = 0;
1479 int r = 0;
1480
1481 /*
1482 * The "ranges" property is an array of
1483 * { <child address> <parent address> <size in child address space> }
1484 *
1485 * All 3 elements can span a diffent number of cells. Fetch their size.
1486 */
1487 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1488 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1489 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1490
1491 /* Now try to get the ranges property */
1492 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1493 if (!ranges)
1494 return -FDT_ERR_NOTFOUND;
1495 ranges_len /= sizeof(uint32_t);
1496
1497 /* Jump to the n'th entry */
1498 cell = n * (pacells + acells + scells);
1499
1500 /* Read <child address> */
1501 if (child_addr) {
1502 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1503 acells);
1504 if (r)
1505 return r;
1506 }
1507 cell += acells;
1508
1509 /* Read <parent address> */
1510 if (addr)
1511 *addr = fdt_translate_address(fdt, node, ranges + cell);
1512 cell += pacells;
1513
1514 /* Read <size in child address space> */
1515 if (len) {
1516 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1517 if (r)
1518 return r;
1519 }
1520
1521 return 0;
1522}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001523
1524/**
1525 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1526 *
1527 * @fdt: ptr to device tree
1528 * @node: offset of the simplefb node
1529 * @base_address: framebuffer base address
1530 * @width: width in pixels
1531 * @height: height in pixels
1532 * @stride: bytes per line
1533 * @format: pixel format string
1534 *
1535 * Convenience function to fill and enable a simplefb node.
1536 */
1537int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1538 u32 height, u32 stride, const char *format)
1539{
1540 char name[32];
1541 fdt32_t cells[4];
1542 int i, addrc, sizec, ret;
1543
1544 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1545 &addrc, &sizec);
1546 i = 0;
1547 if (addrc == 2)
1548 cells[i++] = cpu_to_fdt32(base_address >> 32);
1549 cells[i++] = cpu_to_fdt32(base_address);
1550 if (sizec == 2)
1551 cells[i++] = 0;
1552 cells[i++] = cpu_to_fdt32(height * stride);
1553
1554 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1555 if (ret < 0)
1556 return ret;
1557
Simon Glassc3ec6462015-04-20 12:37:16 -06001558 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001559 ret = fdt_set_name(fdt, node, name);
1560 if (ret < 0)
1561 return ret;
1562
1563 ret = fdt_setprop_u32(fdt, node, "width", width);
1564 if (ret < 0)
1565 return ret;
1566
1567 ret = fdt_setprop_u32(fdt, node, "height", height);
1568 if (ret < 0)
1569 return ret;
1570
1571 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1572 if (ret < 0)
1573 return ret;
1574
1575 ret = fdt_setprop_string(fdt, node, "format", format);
1576 if (ret < 0)
1577 return ret;
1578
1579 ret = fdt_setprop_string(fdt, node, "status", "okay");
1580 if (ret < 0)
1581 return ret;
1582
1583 return 0;
1584}
Tim Harvey08daa252015-04-08 11:45:39 -07001585
1586/*
1587 * Update native-mode in display-timings from display environment variable.
1588 * The node to update are specified by path.
1589 */
1590int fdt_fixup_display(void *blob, const char *path, const char *display)
1591{
1592 int off, toff;
1593
1594 if (!display || !path)
1595 return -FDT_ERR_NOTFOUND;
1596
1597 toff = fdt_path_offset(blob, path);
1598 if (toff >= 0)
1599 toff = fdt_subnode_offset(blob, toff, "display-timings");
1600 if (toff < 0)
1601 return toff;
1602
1603 for (off = fdt_first_subnode(blob, toff);
1604 off >= 0;
1605 off = fdt_next_subnode(blob, off)) {
1606 uint32_t h = fdt_get_phandle(blob, off);
1607 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1608 fdt32_to_cpu(h));
1609 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1610 return fdt_setprop_u32(blob, toff, "native-mode", h);
1611 }
1612 return toff;
1613}