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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 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 }
512 tmp = getenv(mac);
513 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
645#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
646/*
Stefan Roese8a805df2010-09-16 14:01:53 +0200647 * Provide a weak default function to return the flash bank size.
648 * There might be multiple non-identical flash chips connected to one
649 * chip-select, so we need to pass an index as well.
650 */
651u32 __flash_get_bank_size(int cs, int idx)
652{
653 extern flash_info_t flash_info[];
654
655 /*
656 * As default, a simple 1:1 mapping is provided. Boards with
657 * a different mapping need to supply a board specific mapping
658 * routine.
659 */
660 return flash_info[cs].size;
661}
662u32 flash_get_bank_size(int cs, int idx)
663 __attribute__((weak, alias("__flash_get_bank_size")));
664
665/*
Stefan Roese30d45c02009-10-21 11:59:52 +0200666 * This function can be used to update the size in the "reg" property
Stefan Roese8a805df2010-09-16 14:01:53 +0200667 * of all NOR FLASH device nodes. This is necessary for boards with
Stefan Roese30d45c02009-10-21 11:59:52 +0200668 * non-fixed NOR FLASH sizes.
669 */
Stefan Roese8a805df2010-09-16 14:01:53 +0200670int fdt_fixup_nor_flash_size(void *blob)
Stefan Roese30d45c02009-10-21 11:59:52 +0200671{
672 char compat[][16] = { "cfi-flash", "jedec-flash" };
673 int off;
674 int len;
675 struct fdt_property *prop;
Stefan Roese2778a012010-09-24 13:51:50 +0200676 u32 *reg, *reg2;
Stefan Roese30d45c02009-10-21 11:59:52 +0200677 int i;
678
679 for (i = 0; i < 2; i++) {
680 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
681 while (off != -FDT_ERR_NOTFOUND) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200682 int idx;
683
Stefan Roese30d45c02009-10-21 11:59:52 +0200684 /*
Stefan Roese8a805df2010-09-16 14:01:53 +0200685 * Found one compatible node, so fixup the size
686 * int its reg properties
Stefan Roese30d45c02009-10-21 11:59:52 +0200687 */
688 prop = fdt_get_property_w(blob, off, "reg", &len);
689 if (prop) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200690 int tuple_size = 3 * sizeof(reg);
Stefan Roese30d45c02009-10-21 11:59:52 +0200691
Stefan Roese8a805df2010-09-16 14:01:53 +0200692 /*
693 * There might be multiple reg-tuples,
694 * so loop through them all
695 */
Stefan Roese2778a012010-09-24 13:51:50 +0200696 reg = reg2 = (u32 *)&prop->data[0];
697 for (idx = 0; idx < (len / tuple_size); idx++) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200698 /*
699 * Update size in reg property
700 */
701 reg[2] = flash_get_bank_size(reg[0],
702 idx);
Stefan Roese2778a012010-09-24 13:51:50 +0200703
704 /*
705 * Point to next reg tuple
706 */
707 reg += 3;
Stefan Roese30d45c02009-10-21 11:59:52 +0200708 }
Stefan Roese2778a012010-09-24 13:51:50 +0200709
710 fdt_setprop(blob, off, "reg", reg2, len);
Stefan Roese30d45c02009-10-21 11:59:52 +0200711 }
712
713 /* Move to next compatible node */
714 off = fdt_node_offset_by_compatible(blob, off,
715 compat[i]);
716 }
717 }
718
Stefan Roese8a805df2010-09-16 14:01:53 +0200719 return 0;
Stefan Roese30d45c02009-10-21 11:59:52 +0200720}
721#endif
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100722
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200723int fdt_increase_size(void *fdt, int add_len)
724{
725 int newlen;
726
727 newlen = fdt_totalsize(fdt) + add_len;
728
729 /* Open in place with a new len */
730 return fdt_open_into(fdt, fdt, newlen);
731}
732
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100733#ifdef CONFIG_FDT_FIXUP_PARTITIONS
734#include <jffs2/load_kernel.h>
735#include <mtd_node.h>
736
737struct reg_cell {
738 unsigned int r0;
739 unsigned int r1;
740};
741
742int fdt_del_subnodes(const void *blob, int parent_offset)
743{
744 int off, ndepth;
745 int ret;
746
747 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
748 (off >= 0) && (ndepth > 0);
749 off = fdt_next_node(blob, off, &ndepth)) {
750 if (ndepth == 1) {
751 debug("delete %s: offset: %x\n",
752 fdt_get_name(blob, off, 0), off);
753 ret = fdt_del_node((void *)blob, off);
754 if (ret < 0) {
755 printf("Can't delete node: %s\n",
756 fdt_strerror(ret));
757 return ret;
758 } else {
759 ndepth = 0;
760 off = parent_offset;
761 }
762 }
763 }
764 return 0;
765}
766
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100767int fdt_del_partitions(void *blob, int parent_offset)
768{
769 const void *prop;
770 int ndepth = 0;
771 int off;
772 int ret;
773
774 off = fdt_next_node(blob, parent_offset, &ndepth);
775 if (off > 0 && ndepth == 1) {
776 prop = fdt_getprop(blob, off, "label", NULL);
777 if (prop == NULL) {
778 /*
779 * Could not find label property, nand {}; node?
780 * Check subnode, delete partitions there if any.
781 */
782 return fdt_del_partitions(blob, off);
783 } else {
784 ret = fdt_del_subnodes(blob, parent_offset);
785 if (ret < 0) {
786 printf("Can't remove subnodes: %s\n",
787 fdt_strerror(ret));
788 return ret;
789 }
790 }
791 }
792 return 0;
793}
794
795int fdt_node_set_part_info(void *blob, int parent_offset,
796 struct mtd_device *dev)
797{
798 struct list_head *pentry;
799 struct part_info *part;
800 struct reg_cell cell;
801 int off, ndepth = 0;
802 int part_num, ret;
803 char buf[64];
804
805 ret = fdt_del_partitions(blob, parent_offset);
806 if (ret < 0)
807 return ret;
808
809 /*
810 * Check if it is nand {}; subnode, adjust
811 * the offset in this case
812 */
813 off = fdt_next_node(blob, parent_offset, &ndepth);
814 if (off > 0 && ndepth == 1)
815 parent_offset = off;
816
817 part_num = 0;
818 list_for_each_prev(pentry, &dev->parts) {
819 int newoff;
820
821 part = list_entry(pentry, struct part_info, link);
822
Scott Wood06503f12013-10-15 17:41:27 -0500823 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100824 part_num, part->name, part->size,
825 part->offset, part->mask_flags);
826
Scott Wood06503f12013-10-15 17:41:27 -0500827 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100828add_sub:
829 ret = fdt_add_subnode(blob, parent_offset, buf);
830 if (ret == -FDT_ERR_NOSPACE) {
831 ret = fdt_increase_size(blob, 512);
832 if (!ret)
833 goto add_sub;
834 else
835 goto err_size;
836 } else if (ret < 0) {
837 printf("Can't add partition node: %s\n",
838 fdt_strerror(ret));
839 return ret;
840 }
841 newoff = ret;
842
843 /* Check MTD_WRITEABLE_CMD flag */
844 if (part->mask_flags & 1) {
845add_ro:
846 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
847 if (ret == -FDT_ERR_NOSPACE) {
848 ret = fdt_increase_size(blob, 512);
849 if (!ret)
850 goto add_ro;
851 else
852 goto err_size;
853 } else if (ret < 0)
854 goto err_prop;
855 }
856
857 cell.r0 = cpu_to_fdt32(part->offset);
858 cell.r1 = cpu_to_fdt32(part->size);
859add_reg:
860 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
861 if (ret == -FDT_ERR_NOSPACE) {
862 ret = fdt_increase_size(blob, 512);
863 if (!ret)
864 goto add_reg;
865 else
866 goto err_size;
867 } else if (ret < 0)
868 goto err_prop;
869
870add_label:
871 ret = fdt_setprop_string(blob, newoff, "label", part->name);
872 if (ret == -FDT_ERR_NOSPACE) {
873 ret = fdt_increase_size(blob, 512);
874 if (!ret)
875 goto add_label;
876 else
877 goto err_size;
878 } else if (ret < 0)
879 goto err_prop;
880
881 part_num++;
882 }
883 return 0;
884err_size:
885 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
886 return ret;
887err_prop:
888 printf("Can't add property: %s\n", fdt_strerror(ret));
889 return ret;
890}
891
892/*
893 * Update partitions in nor/nand nodes using info from
894 * mtdparts environment variable. The nodes to update are
895 * specified by node_info structure which contains mtd device
896 * type and compatible string: E. g. the board code in
897 * ft_board_setup() could use:
898 *
899 * struct node_info nodes[] = {
900 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
901 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
902 * };
903 *
904 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
905 */
906void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
907{
908 struct node_info *ni = node_info;
909 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100910 int i, idx;
911 int noff;
912
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100913 if (mtdparts_init() != 0)
914 return;
915
916 for (i = 0; i < node_info_size; i++) {
917 idx = 0;
918 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
919 while (noff != -FDT_ERR_NOTFOUND) {
920 debug("%s: %s, mtd dev type %d\n",
921 fdt_get_name(blob, noff, 0),
922 ni[i].compat, ni[i].type);
923 dev = device_find(ni[i].type, idx++);
924 if (dev) {
925 if (fdt_node_set_part_info(blob, noff, dev))
926 return; /* return on error */
927 }
928
929 /* Jump to next flash node */
930 noff = fdt_node_offset_by_compatible(blob, noff,
931 ni[i].compat);
932 }
933 }
934}
935#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500936
937void fdt_del_node_and_alias(void *blob, const char *alias)
938{
939 int off = fdt_path_offset(blob, alias);
940
941 if (off < 0)
942 return;
943
944 fdt_del_node(blob, off);
945
946 off = fdt_path_offset(blob, "/aliases");
947 fdt_delprop(blob, off, alias);
948}
Kumar Galaa0342c02010-06-16 14:27:38 -0500949
Kumar Galaa0342c02010-06-16 14:27:38 -0500950/* Max address size we deal with */
951#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800952#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100953#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
954 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500955
956/* Debug utility */
957#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000958static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500959{
960 printf("%s", s);
961 while(na--)
962 printf(" %08x", *(addr++));
963 printf("\n");
964}
965#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000966static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500967#endif
968
Paul Burton0a222d52016-05-17 07:43:24 +0100969/**
970 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +0100971 * @name: A string used to identify this bus in debug output.
972 * @addresses: The name of the DT property from which addresses are
973 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +0100974 * @match: Return non-zero if the node whose parent is at
975 * parentoffset in the FDT blob corresponds to a bus
976 * of this type, otherwise return zero. If NULL a match
977 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +0100978 * @count_cells:Count how many cells (be32 values) a node whose parent
979 * is at parentoffset in the FDT blob will require to
980 * represent its address (written to *addrc) & size
981 * (written to *sizec).
982 * @map: Map the address addr from the address space of this
983 * bus to that of its parent, making use of the ranges
984 * read from DT to an array at range. na and ns are the
985 * number of cells (be32 values) used to hold and address
986 * or size, respectively, for this bus. pna is the number
987 * of cells used to hold an address for the parent bus.
988 * Returns the address in the address space of the parent
989 * bus.
990 * @translate: Update the value of the address cells at addr within an
991 * FDT by adding offset to it. na specifies the number of
992 * cells used to hold the address being translated. Returns
993 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +0100994 *
995 * Each bus type will include a struct of_bus in the of_busses array,
996 * providing implementations of some or all of the functions used to
997 * match the bus & handle address translation for its children.
998 */
Kumar Galaa0342c02010-06-16 14:27:38 -0500999struct of_bus {
1000 const char *name;
1001 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -06001002 int (*match)(const void *blob, int parentoffset);
1003 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001004 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001005 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001006 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001007 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001008};
1009
1010/* Default translator (generic bus) */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001011void of_bus_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001012 int *addrc, int *sizec)
1013{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001014 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -05001015
Simon Glass933cdbb2014-10-23 18:58:57 -06001016 if (addrc)
1017 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -05001018
1019 if (sizec) {
1020 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1021 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001022 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -05001023 else
1024 *sizec = 1;
1025 }
Kumar Galaa0342c02010-06-16 14:27:38 -05001026}
1027
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001028static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001029 int na, int ns, int pna)
1030{
1031 u64 cp, s, da;
1032
1033 cp = of_read_number(range, na);
1034 s = of_read_number(range + na + pna, ns);
1035 da = of_read_number(addr, na);
1036
Simon Glasse48f3742014-11-11 12:47:07 -07001037 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1038 ", da=%" PRIu64 "\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001039
1040 if (da < cp || da >= (cp + s))
1041 return OF_BAD_ADDR;
1042 return da - cp;
1043}
1044
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001045static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001046{
1047 u64 a = of_read_number(addr, na);
1048 memset(addr, 0, na * 4);
1049 a += offset;
1050 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001051 addr[na - 2] = cpu_to_fdt32(a >> 32);
1052 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001053
1054 return 0;
1055}
1056
Paul Burton0a222d52016-05-17 07:43:24 +01001057#ifdef CONFIG_OF_ISA_BUS
1058
1059/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001060static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001061{
1062 const char *name;
1063
1064 name = fdt_get_name(blob, parentoffset, NULL);
1065 if (!name)
1066 return 0;
1067
1068 return !strcmp(name, "isa");
1069}
1070
Stephen Warren11e44fc2016-08-05 09:47:50 -06001071static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +01001072 int *addrc, int *sizec)
1073{
1074 if (addrc)
1075 *addrc = 2;
1076 if (sizec)
1077 *sizec = 1;
1078}
1079
1080static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1081 int na, int ns, int pna)
1082{
1083 u64 cp, s, da;
1084
1085 /* Check address type match */
1086 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1087 return OF_BAD_ADDR;
1088
1089 cp = of_read_number(range + 1, na - 1);
1090 s = of_read_number(range + na + pna, ns);
1091 da = of_read_number(addr + 1, na - 1);
1092
1093 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64
1094 ", da=%" PRIu64 "\n", cp, s, da);
1095
1096 if (da < cp || da >= (cp + s))
1097 return OF_BAD_ADDR;
1098 return da - cp;
1099}
1100
1101static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1102{
1103 return of_bus_default_translate(addr + 1, offset, na - 1);
1104}
1105
1106#endif /* CONFIG_OF_ISA_BUS */
1107
Kumar Galaa0342c02010-06-16 14:27:38 -05001108/* Array of bus specific translators */
1109static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001110#ifdef CONFIG_OF_ISA_BUS
1111 /* ISA */
1112 {
1113 .name = "isa",
1114 .addresses = "reg",
1115 .match = of_bus_isa_match,
1116 .count_cells = of_bus_isa_count_cells,
1117 .map = of_bus_isa_map,
1118 .translate = of_bus_isa_translate,
1119 },
1120#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001121 /* Default */
1122 {
1123 .name = "default",
1124 .addresses = "reg",
1125 .count_cells = of_bus_default_count_cells,
1126 .map = of_bus_default_map,
1127 .translate = of_bus_default_translate,
1128 },
1129};
1130
Stephen Warren11e44fc2016-08-05 09:47:50 -06001131static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001132{
1133 struct of_bus *bus;
1134
1135 if (ARRAY_SIZE(of_busses) == 1)
1136 return of_busses;
1137
1138 for (bus = of_busses; bus; bus++) {
1139 if (!bus->match || bus->match(blob, parentoffset))
1140 return bus;
1141 }
1142
1143 /*
1144 * We should always have matched the default bus at least, since
1145 * it has a NULL match field. If we didn't then it somehow isn't
1146 * in the of_busses array or something equally catastrophic has
1147 * gone wrong.
1148 */
1149 assert(0);
1150 return NULL;
1151}
1152
Stephen Warren11e44fc2016-08-05 09:47:50 -06001153static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001154 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001155 int na, int ns, int pna, const char *rprop)
1156{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001157 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001158 int rlen;
1159 int rone;
1160 u64 offset = OF_BAD_ADDR;
1161
1162 /* Normally, an absence of a "ranges" property means we are
1163 * crossing a non-translatable boundary, and thus the addresses
1164 * below the current not cannot be converted to CPU physical ones.
1165 * Unfortunately, while this is very clear in the spec, it's not
1166 * what Apple understood, and they do have things like /uni-n or
1167 * /ht nodes with no "ranges" property and a lot of perfectly
1168 * useable mapped devices below them. Thus we treat the absence of
1169 * "ranges" as equivalent to an empty "ranges" property which means
1170 * a 1:1 translation at that level. It's up to the caller not to try
1171 * to translate addresses that aren't supposed to be translated in
1172 * the first place. --BenH.
1173 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001174 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001175 if (ranges == NULL || rlen == 0) {
1176 offset = of_read_number(addr, na);
1177 memset(addr, 0, pna * 4);
1178 debug("OF: no ranges, 1:1 translation\n");
1179 goto finish;
1180 }
1181
1182 debug("OF: walking ranges...\n");
1183
1184 /* Now walk through the ranges */
1185 rlen /= 4;
1186 rone = na + pna + ns;
1187 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1188 offset = bus->map(addr, ranges, na, ns, pna);
1189 if (offset != OF_BAD_ADDR)
1190 break;
1191 }
1192 if (offset == OF_BAD_ADDR) {
1193 debug("OF: not found !\n");
1194 return 1;
1195 }
1196 memcpy(addr, ranges + na, 4 * pna);
1197
1198 finish:
1199 of_dump_addr("OF: parent translation for:", addr, pna);
Simon Glasse48f3742014-11-11 12:47:07 -07001200 debug("OF: with offset: %" PRIu64 "\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001201
1202 /* Translate it into parent bus space */
1203 return pbus->translate(addr, offset, pna);
1204}
1205
1206/*
1207 * Translate an address from the device-tree into a CPU physical address,
1208 * this walks up the tree and applies the various bus mappings on the
1209 * way.
1210 *
1211 * Note: We consider that crossing any level with #size-cells == 0 to mean
1212 * that translation is impossible (that is we are not dealing with a value
1213 * that can be mapped to a cpu physical address). This is not really specified
1214 * that way, but this is traditionally the way IBM at least do things
1215 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001216static u64 __of_translate_address(const void *blob, int node_offset,
1217 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001218{
1219 int parent;
1220 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001221 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001222 int na, ns, pna, pns;
1223 u64 result = OF_BAD_ADDR;
1224
1225 debug("OF: ** translation for device %s **\n",
1226 fdt_get_name(blob, node_offset, NULL));
1227
1228 /* Get parent & match bus type */
1229 parent = fdt_parent_offset(blob, node_offset);
1230 if (parent < 0)
1231 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001232 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001233
1234 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001235 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001236 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001237 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1238 fdt_get_name(blob, node_offset, NULL));
1239 goto bail;
1240 }
1241 memcpy(addr, in_addr, na * 4);
1242
1243 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1244 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1245 of_dump_addr("OF: translating address:", addr, na);
1246
1247 /* Translate */
1248 for (;;) {
1249 /* Switch to parent bus */
1250 node_offset = parent;
1251 parent = fdt_parent_offset(blob, node_offset);
1252
1253 /* If root, we have finished */
1254 if (parent < 0) {
1255 debug("OF: reached root node\n");
1256 result = of_read_number(addr, na);
1257 break;
1258 }
1259
1260 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001261 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001262 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001263 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001264 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1265 fdt_get_name(blob, node_offset, NULL));
1266 break;
1267 }
1268
1269 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1270 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1271
1272 /* Apply bus translation */
1273 if (of_translate_one(blob, node_offset, bus, pbus,
1274 addr, na, ns, pna, rprop))
1275 break;
1276
1277 /* Complete the move up one level */
1278 na = pna;
1279 ns = pns;
1280 bus = pbus;
1281
1282 of_dump_addr("OF: one level translation:", addr, na);
1283 }
1284 bail:
1285
1286 return result;
1287}
1288
Stephen Warren11e44fc2016-08-05 09:47:50 -06001289u64 fdt_translate_address(const void *blob, int node_offset,
1290 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001291{
1292 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1293}
Kumar Gala75e73af2010-07-04 12:48:21 -05001294
1295/**
1296 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1297 * who's reg property matches a physical cpu address
1298 *
1299 * @blob: ptr to device tree
1300 * @compat: compatiable string to match
1301 * @compat_off: property name
1302 *
1303 */
1304int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1305 phys_addr_t compat_off)
1306{
1307 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1308 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001309 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001310 if (reg) {
1311 if (compat_off == fdt_translate_address(blob, off, reg))
1312 return off;
1313 }
1314 off = fdt_node_offset_by_compatible(blob, off, compat);
1315 }
1316
1317 return -FDT_ERR_NOTFOUND;
1318}
1319
Kumar Galab4b847e2010-07-09 16:18:58 -05001320/**
1321 * fdt_alloc_phandle: Return next free phandle value
1322 *
1323 * @blob: ptr to device tree
1324 */
1325int fdt_alloc_phandle(void *blob)
1326{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001327 int offset;
1328 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001329
Kumar Galab4b847e2010-07-09 16:18:58 -05001330 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1331 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001332 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001333 }
1334
1335 return phandle + 1;
1336}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001337
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001338/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001339 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001340 *
1341 * @fdt: ptr to device tree
1342 * @nodeoffset: node to update
1343 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001344 */
1345int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001346{
1347 int ret;
1348
1349#ifdef DEBUG
1350 int off = fdt_node_offset_by_phandle(fdt, phandle);
1351
1352 if ((off >= 0) && (off != nodeoffset)) {
1353 char buf[64];
1354
1355 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1356 printf("Trying to update node %s with phandle %u ",
1357 buf, phandle);
1358
1359 fdt_get_path(fdt, off, buf, sizeof(buf));
1360 printf("that already exists in node %s.\n", buf);
1361 return -FDT_ERR_BADPHANDLE;
1362 }
1363#endif
1364
1365 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1366 if (ret < 0)
1367 return ret;
1368
1369 /*
1370 * For now, also set the deprecated "linux,phandle" property, so that we
1371 * don't break older kernels.
1372 */
1373 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1374
1375 return ret;
1376}
1377
Kumar Gala10aeabd2011-08-01 00:25:20 -05001378/*
1379 * fdt_create_phandle: Create a phandle property for the given node
1380 *
1381 * @fdt: ptr to device tree
1382 * @nodeoffset: node to update
1383 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001384unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001385{
1386 /* see if there is a phandle already */
1387 int phandle = fdt_get_phandle(fdt, nodeoffset);
1388
1389 /* if we got 0, means no phandle so create one */
1390 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001391 int ret;
1392
Kumar Gala10aeabd2011-08-01 00:25:20 -05001393 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001394 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1395 if (ret < 0) {
1396 printf("Can't set phandle %u: %s\n", phandle,
1397 fdt_strerror(ret));
1398 return 0;
1399 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001400 }
1401
1402 return phandle;
1403}
1404
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001405/*
1406 * fdt_set_node_status: Set status for the given node
1407 *
1408 * @fdt: ptr to device tree
1409 * @nodeoffset: node to update
1410 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1411 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1412 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1413 */
1414int fdt_set_node_status(void *fdt, int nodeoffset,
1415 enum fdt_status status, unsigned int error_code)
1416{
1417 char buf[16];
1418 int ret = 0;
1419
1420 if (nodeoffset < 0)
1421 return nodeoffset;
1422
1423 switch (status) {
1424 case FDT_STATUS_OKAY:
1425 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1426 break;
1427 case FDT_STATUS_DISABLED:
1428 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1429 break;
1430 case FDT_STATUS_FAIL:
1431 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1432 break;
1433 case FDT_STATUS_FAIL_ERROR_CODE:
1434 sprintf(buf, "fail-%d", error_code);
1435 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1436 break;
1437 default:
1438 printf("Invalid fdt status: %x\n", status);
1439 ret = -1;
1440 break;
1441 }
1442
1443 return ret;
1444}
1445
1446/*
1447 * fdt_set_status_by_alias: Set status for the given node given an alias
1448 *
1449 * @fdt: ptr to device tree
1450 * @alias: alias of node to update
1451 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1452 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1453 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1454 */
1455int fdt_set_status_by_alias(void *fdt, const char* alias,
1456 enum fdt_status status, unsigned int error_code)
1457{
1458 int offset = fdt_path_offset(fdt, alias);
1459
1460 return fdt_set_node_status(fdt, offset, status, error_code);
1461}
1462
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001463#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001464int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1465{
1466 int noff;
1467 int ret;
1468
1469 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1470 if (noff != -FDT_ERR_NOTFOUND) {
1471 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1472add_edid:
1473 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1474 if (ret == -FDT_ERR_NOSPACE) {
1475 ret = fdt_increase_size(blob, 512);
1476 if (!ret)
1477 goto add_edid;
1478 else
1479 goto err_size;
1480 } else if (ret < 0) {
1481 printf("Can't add property: %s\n", fdt_strerror(ret));
1482 return ret;
1483 }
1484 }
1485 return 0;
1486err_size:
1487 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1488 return ret;
1489}
1490#endif
Timur Tabibb682002011-05-03 13:24:07 -05001491
1492/*
1493 * Verify the physical address of device tree node for a given alias
1494 *
1495 * This function locates the device tree node of a given alias, and then
1496 * verifies that the physical address of that device matches the given
1497 * parameter. It displays a message if there is a mismatch.
1498 *
1499 * Returns 1 on success, 0 on failure
1500 */
1501int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1502{
1503 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001504 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001505 int node, len;
1506 u64 dt_addr;
1507
1508 path = fdt_getprop(fdt, anode, alias, NULL);
1509 if (!path) {
1510 /* If there's no such alias, then it's not a failure */
1511 return 1;
1512 }
1513
1514 node = fdt_path_offset(fdt, path);
1515 if (node < 0) {
1516 printf("Warning: device tree alias '%s' points to invalid "
1517 "node %s.\n", alias, path);
1518 return 0;
1519 }
1520
1521 reg = fdt_getprop(fdt, node, "reg", &len);
1522 if (!reg) {
1523 printf("Warning: device tree node '%s' has no address.\n",
1524 path);
1525 return 0;
1526 }
1527
1528 dt_addr = fdt_translate_address(fdt, node, reg);
1529 if (addr != dt_addr) {
Simon Glasse48f3742014-11-11 12:47:07 -07001530 printf("Warning: U-Boot configured device %s at address %"
1531 PRIx64 ",\n but the device tree has it address %"
1532 PRIx64 ".\n", alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001533 return 0;
1534 }
1535
1536 return 1;
1537}
1538
1539/*
1540 * Returns the base address of an SOC or PCI node
1541 */
Simon Glassec002112017-05-18 20:09:00 -06001542u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001543{
1544 int size;
1545 u32 naddr;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001546 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001547
Simon Glass933cdbb2014-10-23 18:58:57 -06001548 naddr = fdt_address_cells(fdt, node);
Timur Tabibb682002011-05-03 13:24:07 -05001549
1550 prop = fdt_getprop(fdt, node, "ranges", &size);
1551
1552 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1553}
Alexander Grafc48e6862014-04-11 17:09:41 +02001554
1555/*
1556 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1557 */
1558static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1559 uint64_t *val, int cells)
1560{
1561 const fdt32_t *prop32 = &prop[cell_off];
1562 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1563
1564 if ((cell_off + cells) > prop_len)
1565 return -FDT_ERR_NOSPACE;
1566
1567 switch (cells) {
1568 case 1:
1569 *val = fdt32_to_cpu(*prop32);
1570 break;
1571 case 2:
1572 *val = fdt64_to_cpu(*prop64);
1573 break;
1574 default:
1575 return -FDT_ERR_NOSPACE;
1576 }
1577
1578 return 0;
1579}
1580
1581/**
1582 * fdt_read_range - Read a node's n'th range property
1583 *
1584 * @fdt: ptr to device tree
1585 * @node: offset of node
1586 * @n: range index
1587 * @child_addr: pointer to storage for the "child address" field
1588 * @addr: pointer to storage for the CPU view translated physical start
1589 * @len: pointer to storage for the range length
1590 *
1591 * Convenience function that reads and interprets a specific range out of
1592 * a number of the "ranges" property array.
1593 */
1594int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1595 uint64_t *addr, uint64_t *len)
1596{
1597 int pnode = fdt_parent_offset(fdt, node);
1598 const fdt32_t *ranges;
1599 int pacells;
1600 int acells;
1601 int scells;
1602 int ranges_len;
1603 int cell = 0;
1604 int r = 0;
1605
1606 /*
1607 * The "ranges" property is an array of
1608 * { <child address> <parent address> <size in child address space> }
1609 *
1610 * All 3 elements can span a diffent number of cells. Fetch their size.
1611 */
1612 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1613 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1614 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1615
1616 /* Now try to get the ranges property */
1617 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1618 if (!ranges)
1619 return -FDT_ERR_NOTFOUND;
1620 ranges_len /= sizeof(uint32_t);
1621
1622 /* Jump to the n'th entry */
1623 cell = n * (pacells + acells + scells);
1624
1625 /* Read <child address> */
1626 if (child_addr) {
1627 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1628 acells);
1629 if (r)
1630 return r;
1631 }
1632 cell += acells;
1633
1634 /* Read <parent address> */
1635 if (addr)
1636 *addr = fdt_translate_address(fdt, node, ranges + cell);
1637 cell += pacells;
1638
1639 /* Read <size in child address space> */
1640 if (len) {
1641 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1642 if (r)
1643 return r;
1644 }
1645
1646 return 0;
1647}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001648
1649/**
1650 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1651 *
1652 * @fdt: ptr to device tree
1653 * @node: offset of the simplefb node
1654 * @base_address: framebuffer base address
1655 * @width: width in pixels
1656 * @height: height in pixels
1657 * @stride: bytes per line
1658 * @format: pixel format string
1659 *
1660 * Convenience function to fill and enable a simplefb node.
1661 */
1662int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1663 u32 height, u32 stride, const char *format)
1664{
1665 char name[32];
1666 fdt32_t cells[4];
1667 int i, addrc, sizec, ret;
1668
1669 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1670 &addrc, &sizec);
1671 i = 0;
1672 if (addrc == 2)
1673 cells[i++] = cpu_to_fdt32(base_address >> 32);
1674 cells[i++] = cpu_to_fdt32(base_address);
1675 if (sizec == 2)
1676 cells[i++] = 0;
1677 cells[i++] = cpu_to_fdt32(height * stride);
1678
1679 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1680 if (ret < 0)
1681 return ret;
1682
Simon Glassc3ec6462015-04-20 12:37:16 -06001683 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001684 ret = fdt_set_name(fdt, node, name);
1685 if (ret < 0)
1686 return ret;
1687
1688 ret = fdt_setprop_u32(fdt, node, "width", width);
1689 if (ret < 0)
1690 return ret;
1691
1692 ret = fdt_setprop_u32(fdt, node, "height", height);
1693 if (ret < 0)
1694 return ret;
1695
1696 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1697 if (ret < 0)
1698 return ret;
1699
1700 ret = fdt_setprop_string(fdt, node, "format", format);
1701 if (ret < 0)
1702 return ret;
1703
1704 ret = fdt_setprop_string(fdt, node, "status", "okay");
1705 if (ret < 0)
1706 return ret;
1707
1708 return 0;
1709}
Tim Harvey08daa252015-04-08 11:45:39 -07001710
1711/*
1712 * Update native-mode in display-timings from display environment variable.
1713 * The node to update are specified by path.
1714 */
1715int fdt_fixup_display(void *blob, const char *path, const char *display)
1716{
1717 int off, toff;
1718
1719 if (!display || !path)
1720 return -FDT_ERR_NOTFOUND;
1721
1722 toff = fdt_path_offset(blob, path);
1723 if (toff >= 0)
1724 toff = fdt_subnode_offset(blob, toff, "display-timings");
1725 if (toff < 0)
1726 return toff;
1727
1728 for (off = fdt_first_subnode(blob, toff);
1729 off >= 0;
1730 off = fdt_next_subnode(blob, off)) {
1731 uint32_t h = fdt_get_phandle(blob, off);
1732 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1733 fdt32_to_cpu(h));
1734 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1735 return fdt_setprop_u32(blob, toff, "native-mode", h);
1736 }
1737 return toff;
1738}