blob: 8ac905011cc2df514191ff235814b455ceb400ec [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04002/*
3 * (C) Copyright 2007
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 *
Shengzhou Liu2a523f52011-10-14 16:26:05 +08006 * Copyright 2010-2011 Freescale Semiconductor, Inc.
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04007 */
8
9#include <common.h>
Simon Glass7b51b572019-08-01 09:46:52 -060010#include <env.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -060011#include <log.h>
Heinrich Schuchardt9ad0a792018-11-18 17:58:51 +010012#include <mapmem.h>
Simon Glass90526e92020-05-10 11:39:56 -060013#include <net.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040014#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040015#include <linux/ctype.h>
16#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040017#include <asm/global_data.h>
Masahiro Yamadab08c8c42018-03-05 01:20:11 +090018#include <linux/libfdt.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040019#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060020#include <exports.h>
Bin Menga0ae3802015-12-07 01:39:47 -080021#include <fdtdec.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040022
Kumar Gala3bed2aa2008-10-23 00:05:47 -050023/**
Alexander Graf94fb1822014-04-11 17:09:40 +020024 * fdt_getprop_u32_default_node - Return a node's property or a default
25 *
26 * @fdt: ptr to device tree
27 * @off: offset of node
28 * @cell: cell offset in property
29 * @prop: property name
30 * @dflt: default value if the property isn't found
31 *
32 * Convenience function to return a node's property or a default value if
33 * the property doesn't exist.
34 */
35u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
36 const char *prop, const u32 dflt)
37{
38 const fdt32_t *val;
39 int len;
40
41 val = fdt_getprop(fdt, off, prop, &len);
42
43 /* Check if property exists */
44 if (!val)
45 return dflt;
46
47 /* Check if property is long enough */
48 if (len < ((cell + 1) * sizeof(uint32_t)))
49 return dflt;
50
51 return fdt32_to_cpu(*val);
52}
53
54/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050055 * fdt_getprop_u32_default - Find a node and return it's property or a default
56 *
57 * @fdt: ptr to device tree
58 * @path: path of node
59 * @prop: property name
60 * @dflt: default value if the property isn't found
61 *
62 * Convenience function to find a node and return it's property or a
63 * default value if it doesn't exist.
64 */
Gabe Black07e12782011-11-08 01:09:44 -080065u32 fdt_getprop_u32_default(const void *fdt, const char *path,
66 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050067{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050068 int off;
69
70 off = fdt_path_offset(fdt, path);
71 if (off < 0)
72 return dflt;
73
Alexander Graf94fb1822014-04-11 17:09:40 +020074 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050075}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040076
Kumar Galaa3c29332007-10-24 10:21:57 -050077/**
78 * fdt_find_and_setprop: Find a node and set it's property
79 *
80 * @fdt: ptr to device tree
81 * @node: path of node
82 * @prop: property name
83 * @val: ptr to new value
84 * @len: length of new property value
85 * @create: flag to create the property if it doesn't exist
86 *
87 * Convenience function to directly set a property given the path to the node.
88 */
89int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
90 const void *val, int len, int create)
91{
Kumar Gala8d04f022007-10-24 11:04:22 -050092 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050093
94 if (nodeoff < 0)
95 return nodeoff;
96
Kim Phillips8aa5ec62013-01-16 14:00:11 +000097 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -050098 return 0; /* create flag not set; so exit quietly */
99
100 return fdt_setprop(fdt, nodeoff, prop, val, len);
101}
102
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900103/**
Simon Glassa9e8e292014-10-23 18:58:49 -0600104 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
105 *
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900106 * @fdt: pointer to the device tree blob
107 * @parentoffset: structure block offset of a node
108 * @name: name of the subnode to locate
109 *
110 * fdt_subnode_offset() finds a subnode of the node with a given name.
111 * If the subnode does not exist, it will be created.
112 */
Simon Glassa9e8e292014-10-23 18:58:49 -0600113int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900114{
115 int offset;
116
117 offset = fdt_subnode_offset(fdt, parentoffset, name);
118
119 if (offset == -FDT_ERR_NOTFOUND)
120 offset = fdt_add_subnode(fdt, parentoffset, name);
121
122 if (offset < 0)
123 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
124
125 return offset;
126}
127
Andre Przywarae036a1d2021-02-14 10:35:18 +0000128#if defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Detlev Zundel40777812008-06-20 22:24:05 +0200129static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600130{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900131 int err;
132 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600133 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900134 const void *path;
135 int len;
136 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600137
Bin Meng9f29aeb2016-01-13 19:38:58 -0800138 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600139
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900140 aliasoff = fdt_path_offset(fdt, "/aliases");
141 if (aliasoff < 0) {
142 err = aliasoff;
Scott Woodda77c812015-09-01 22:48:08 -0500143 goto noalias;
Kumar Gala151c8b02007-11-26 17:06:15 -0600144 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900145
146 path = fdt_getprop(fdt, aliasoff, sername, &len);
147 if (!path) {
148 err = len;
Scott Woodda77c812015-09-01 22:48:08 -0500149 goto noalias;
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900150 }
151
152 /* fdt_setprop may break "path" so we copy it to tmp buffer */
153 memcpy(tmp, path, len);
154
155 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
Kumar Gala151c8b02007-11-26 17:06:15 -0600156 if (err < 0)
157 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900158 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600159
160 return err;
Scott Woodda77c812015-09-01 22:48:08 -0500161
162noalias:
163 printf("WARNING: %s: could not read %s alias: %s\n",
164 __func__, sername, fdt_strerror(err));
165
166 return 0;
Kumar Gala151c8b02007-11-26 17:06:15 -0600167}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900168#else
169static int fdt_fixup_stdout(void *fdt, int chosenoff)
170{
171 return 0;
172}
Kumar Gala151c8b02007-11-26 17:06:15 -0600173#endif
174
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900175static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
176 uint64_t val, int is_u64)
177{
178 if (is_u64)
179 return fdt_setprop_u64(fdt, nodeoffset, name, val);
180 else
181 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
182}
183
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200184int fdt_root(void *fdt)
185{
186 char *serial;
187 int err;
188
189 err = fdt_check_header(fdt);
190 if (err < 0) {
191 printf("fdt_root: %s\n", fdt_strerror(err));
192 return err;
193 }
194
Simon Glass00caae62017-08-03 12:22:12 -0600195 serial = env_get("serial#");
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200196 if (serial) {
197 err = fdt_setprop(fdt, 0, "serial-number", serial,
198 strlen(serial) + 1);
199
200 if (err < 0) {
201 printf("WARNING: could not set serial-number %s.\n",
202 fdt_strerror(err));
203 return err;
204 }
205 }
206
207 return 0;
208}
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900209
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900210int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500211{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900212 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500213 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900214 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500215 uint64_t addr, size;
216
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900217 /* just return if the size of initrd is zero */
218 if (initrd_start == initrd_end)
219 return 0;
220
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900221 /* find or create "/chosen" node. */
222 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
223 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500224 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500225
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500226 total = fdt_num_mem_rsv(fdt);
227
228 /*
229 * Look for an existing entry and update it. If we don't find
230 * the entry, we will j be the next available slot.
231 */
232 for (j = 0; j < total; j++) {
233 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
234 if (addr == initrd_start) {
235 fdt_del_mem_rsv(fdt, j);
236 break;
237 }
238 }
239
Grant Likelyce6b27a2011-03-28 09:58:55 +0000240 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500241 if (err < 0) {
242 printf("fdt_initrd: %s\n", fdt_strerror(err));
243 return err;
244 }
245
Simon Glass933cdbb2014-10-23 18:58:57 -0600246 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800247
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900248 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
249 (uint64_t)initrd_start, is_u64);
250
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900251 if (err < 0) {
252 printf("WARNING: could not set linux,initrd-start %s.\n",
253 fdt_strerror(err));
254 return err;
255 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900256
257 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
258 (uint64_t)initrd_end, is_u64);
259
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900260 if (err < 0) {
261 printf("WARNING: could not set linux,initrd-end %s.\n",
262 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500263
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900264 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500265 }
266
267 return 0;
268}
269
Niko Maunof0b21eb2021-02-22 19:18:51 +0000270/**
271 * board_fdt_chosen_bootargs - boards may override this function to use
272 * alternative kernel command line arguments
273 */
274__weak char *board_fdt_chosen_bootargs(void)
275{
276 return env_get("bootargs");
277}
278
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900279int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400280{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400281 int nodeoffset;
282 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400283 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400284
285 err = fdt_check_header(fdt);
286 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400287 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400288 return err;
289 }
290
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900291 /* find or create "/chosen" node. */
292 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
293 if (nodeoffset < 0)
294 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400295
Niko Maunof0b21eb2021-02-22 19:18:51 +0000296 str = board_fdt_chosen_bootargs();
297
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900298 if (str) {
299 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
300 strlen(str) + 1);
301 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900302 printf("WARNING: could not set bootargs %s.\n",
303 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900304 return err;
305 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400306 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500307
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900308 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400309}
310
Kumar Galae93becf2007-11-03 19:46:28 -0500311void do_fixup_by_path(void *fdt, const char *path, const char *prop,
312 const void *val, int len, int create)
313{
314#if defined(DEBUG)
315 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600316 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500317 for (i = 0; i < len; i++)
318 debug(" %.2x", *(u8*)(val+i));
319 debug("\n");
320#endif
321 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
322 if (rc)
323 printf("Unable to update property %s:%s, err=%s\n",
324 path, prop, fdt_strerror(rc));
325}
326
327void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
328 u32 val, int create)
329{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000330 fdt32_t tmp = cpu_to_fdt32(val);
331 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500332}
333
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600334void do_fixup_by_prop(void *fdt,
335 const char *pname, const void *pval, int plen,
336 const char *prop, const void *val, int len,
337 int create)
338{
339 int off;
340#if defined(DEBUG)
341 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600342 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600343 for (i = 0; i < len; i++)
344 debug(" %.2x", *(u8*)(val+i));
345 debug("\n");
346#endif
347 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
348 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000349 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600350 fdt_setprop(fdt, off, prop, val, len);
351 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
352 }
353}
354
355void do_fixup_by_prop_u32(void *fdt,
356 const char *pname, const void *pval, int plen,
357 const char *prop, u32 val, int create)
358{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000359 fdt32_t tmp = cpu_to_fdt32(val);
360 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600361}
362
363void do_fixup_by_compat(void *fdt, const char *compat,
364 const char *prop, const void *val, int len, int create)
365{
366 int off = -1;
367#if defined(DEBUG)
368 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600369 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600370 for (i = 0; i < len; i++)
371 debug(" %.2x", *(u8*)(val+i));
372 debug("\n");
373#endif
374 off = fdt_node_offset_by_compatible(fdt, -1, compat);
375 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000376 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600377 fdt_setprop(fdt, off, prop, val, len);
378 off = fdt_node_offset_by_compatible(fdt, off, compat);
379 }
380}
381
382void do_fixup_by_compat_u32(void *fdt, const char *compat,
383 const char *prop, u32 val, int create)
384{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000385 fdt32_t tmp = cpu_to_fdt32(val);
386 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600387}
388
Masahiro Yamada63c09412016-11-26 11:02:10 +0900389#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900390/*
391 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
392 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600393static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
394 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900395{
396 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100397 int address_cells = fdt_address_cells(fdt, 0);
398 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900399 char *p = buf;
400
401 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100402 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900403 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
404 else
405 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100406 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900407
Hans de Goedeffccb842014-11-28 14:23:51 +0100408 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900409 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
410 else
411 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100412 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900413 }
414
415 return p - (char *)buf;
416}
417
Ramon Fried6b6f2162018-08-14 00:35:42 +0300418#if CONFIG_NR_DRAM_BANKS > 4
419#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
420#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000421#define MEMORY_BANKS_MAX 4
Ramon Fried6b6f2162018-08-14 00:35:42 +0300422#endif
Michal Simek5e1a3be2021-08-10 09:21:54 +0200423
424/**
425 * fdt_fixup_memory_banks - Update DT memory node
426 * @blob: Pointer to DT blob
427 * @start: Pointer to memory start addresses array
428 * @size: Pointer to memory sizes array
429 * @banks: Number of memory banks
430 *
431 * Return: 0 on success, negative value on failure
432 *
433 * Based on the passed number of banks and arrays, the function is able to
434 * update existing DT memory nodes to match run time detected/changed memory
435 * configuration. Implementation is handling one specific case with only one
436 * memory node where multiple tuples could be added/updated.
437 * The case where multiple memory nodes with a single tuple (base, size) are
438 * used, this function is only updating the first memory node without removing
439 * others.
440 */
John Rigbya6bd9e82010-10-13 13:57:33 -0600441int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
442{
443 int err, nodeoffset;
Thierry Reding6d29cc72018-01-30 11:34:17 +0100444 int len, i;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000445 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600446
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000447 if (banks > MEMORY_BANKS_MAX) {
448 printf("%s: num banks %d exceeds hardcoded limit %d."
449 " Recompile with higher MEMORY_BANKS_MAX?\n",
450 __FUNCTION__, banks, MEMORY_BANKS_MAX);
451 return -1;
452 }
453
Kumar Gala3c927282007-11-26 14:57:45 -0600454 err = fdt_check_header(blob);
455 if (err < 0) {
456 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
457 return err;
458 }
459
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900460 /* find or create "/memory" node. */
461 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
462 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800463 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900464
Kumar Gala3c927282007-11-26 14:57:45 -0600465 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
466 sizeof("memory"));
467 if (err < 0) {
468 printf("WARNING: could not set %s %s.\n", "device_type",
469 fdt_strerror(err));
470 return err;
471 }
472
Thierry Redinged5af032018-02-15 19:05:59 +0100473 for (i = 0; i < banks; i++) {
474 if (start[i] == 0 && size[i] == 0)
475 break;
476 }
477
478 banks = i;
479
Andre Przywara5c1cf892015-06-21 00:29:54 +0100480 if (!banks)
481 return 0;
482
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900483 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600484
485 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
486 if (err < 0) {
487 printf("WARNING: could not set %s %s.\n",
488 "reg", fdt_strerror(err));
489 return err;
490 }
491 return 0;
492}
Igor Opaniuk949b5a92019-12-03 14:04:46 +0200493
494int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas)
495{
496 int err, nodeoffset;
497 int len;
498 u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */
499
500 if (areas > 8) {
501 printf("%s: num areas %d exceeds hardcoded limit %d\n",
502 __func__, areas, 8);
503 return -1;
504 }
505
506 err = fdt_check_header(blob);
507 if (err < 0) {
508 printf("%s: %s\n", __func__, fdt_strerror(err));
509 return err;
510 }
511
512 /* find or create "/memory" node. */
513 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
514 if (nodeoffset < 0)
515 return nodeoffset;
516
517 len = fdt_pack_reg(blob, tmp, start, size, areas);
518
519 err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len);
520 if (err < 0) {
521 printf("WARNING: could not set %s %s.\n",
522 "reg", fdt_strerror(err));
523 return err;
524 }
525
526 return 0;
527}
Masahiro Yamada63c09412016-11-26 11:02:10 +0900528#endif
Kumar Gala3c927282007-11-26 14:57:45 -0600529
John Rigbya6bd9e82010-10-13 13:57:33 -0600530int fdt_fixup_memory(void *blob, u64 start, u64 size)
531{
532 return fdt_fixup_memory_banks(blob, &start, &size, 1);
533}
534
Kumar Galaba37aa02008-08-19 15:41:18 -0500535void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600536{
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530537 int i = 0, j, prop;
Bin Mengbc393a72015-11-03 04:24:41 -0800538 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000539 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600540 const char *path;
oliver@schinagl.nla40db6d2016-11-25 16:30:19 +0100541 unsigned char mac_addr[ARP_HLEN];
Bin Mengbc393a72015-11-03 04:24:41 -0800542 int offset;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530543#ifdef FDT_SEQ_MACADDR_FROM_ENV
544 int nodeoff;
545 const struct fdt_property *fdt_prop;
546#endif
Kumar Galaab544632007-11-21 11:11:03 -0600547
Lev Iserovicha434fd12016-01-07 18:04:16 -0500548 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galaba37aa02008-08-19 15:41:18 -0500549 return;
550
Lev Iserovicha434fd12016-01-07 18:04:16 -0500551 /* Cycle through all aliases */
552 for (prop = 0; ; prop++) {
Bin Mengbc393a72015-11-03 04:24:41 -0800553 const char *name;
Bin Mengbc393a72015-11-03 04:24:41 -0800554
Lev Iserovicha434fd12016-01-07 18:04:16 -0500555 /* FDT might have been edited, recompute the offset */
556 offset = fdt_first_property_offset(fdt,
557 fdt_path_offset(fdt, "/aliases"));
558 /* Select property number 'prop' */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530559 for (j = 0; j < prop; j++)
Lev Iserovicha434fd12016-01-07 18:04:16 -0500560 offset = fdt_next_property_offset(fdt, offset);
561
562 if (offset < 0)
563 break;
564
Bin Mengbc393a72015-11-03 04:24:41 -0800565 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200566 if (!strncmp(name, "ethernet", 8)) {
567 /* Treat plain "ethernet" same as "ethernet0". */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530568 if (!strcmp(name, "ethernet")
569#ifdef FDT_SEQ_MACADDR_FROM_ENV
570 || !strcmp(name, "ethernet0")
571#endif
572 )
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200573 i = 0;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530574#ifndef FDT_SEQ_MACADDR_FROM_ENV
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200575 else
576 i = trailing_strtol(name);
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530577#endif
Bin Mengbc393a72015-11-03 04:24:41 -0800578 if (i != -1) {
579 if (i == 0)
580 strcpy(mac, "ethaddr");
581 else
582 sprintf(mac, "eth%daddr", i);
583 } else {
584 continue;
585 }
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530586#ifdef FDT_SEQ_MACADDR_FROM_ENV
587 nodeoff = fdt_path_offset(fdt, path);
588 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
589 NULL);
590 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
591 continue;
592 i++;
593#endif
Simon Glass00caae62017-08-03 12:22:12 -0600594 tmp = env_get(mac);
Bin Mengbc393a72015-11-03 04:24:41 -0800595 if (!tmp)
596 continue;
597
598 for (j = 0; j < 6; j++) {
599 mac_addr[j] = tmp ?
Simon Glass7e5f4602021-07-24 09:03:29 -0600600 hextoul(tmp, &end) : 0;
Bin Mengbc393a72015-11-03 04:24:41 -0800601 if (tmp)
602 tmp = (*end) ? end + 1 : end;
603 }
604
605 do_fixup_by_path(fdt, path, "mac-address",
606 &mac_addr, 6, 0);
607 do_fixup_by_path(fdt, path, "local-mac-address",
608 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500609 }
Kumar Galaab544632007-11-21 11:11:03 -0600610 }
611}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300612
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100613int fdt_record_loadable(void *blob, u32 index, const char *name,
614 uintptr_t load_addr, u32 size, uintptr_t entry_point,
Michal Simekbe2d1a82021-05-27 11:40:09 +0200615 const char *type, const char *os, const char *arch)
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100616{
617 int err, node;
618
619 err = fdt_check_header(blob);
620 if (err < 0) {
621 printf("%s: %s\n", __func__, fdt_strerror(err));
622 return err;
623 }
624
625 /* find or create "/fit-images" node */
626 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
627 if (node < 0)
628 return node;
629
630 /* find or create "/fit-images/<name>" node */
631 node = fdt_find_or_add_subnode(blob, node, name);
632 if (node < 0)
633 return node;
634
Michal Simek13d1ca82020-09-03 12:44:51 +0200635 fdt_setprop_u64(blob, node, "load", load_addr);
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100636 if (entry_point != -1)
Michal Simek13d1ca82020-09-03 12:44:51 +0200637 fdt_setprop_u64(blob, node, "entry", entry_point);
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100638 fdt_setprop_u32(blob, node, "size", size);
639 if (type)
640 fdt_setprop_string(blob, node, "type", type);
641 if (os)
642 fdt_setprop_string(blob, node, "os", os);
Michal Simekbe2d1a82021-05-27 11:40:09 +0200643 if (arch)
644 fdt_setprop_string(blob, node, "arch", arch);
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100645
646 return node;
647}
648
Kumar Gala3082d232008-08-15 08:24:42 -0500649/* Resize the fdt to its actual size + a bit of padding */
Hannes Schmelzeref476832016-09-20 18:10:43 +0200650int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Gala3082d232008-08-15 08:24:42 -0500651{
652 int i;
653 uint64_t addr, size;
654 int total, ret;
655 uint actualsize;
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200656 int fdt_memrsv = 0;
Kumar Gala3082d232008-08-15 08:24:42 -0500657
658 if (!blob)
659 return 0;
660
661 total = fdt_num_mem_rsv(blob);
662 for (i = 0; i < total; i++) {
663 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000664 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500665 fdt_del_mem_rsv(blob, i);
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200666 fdt_memrsv = 1;
Kumar Gala3082d232008-08-15 08:24:42 -0500667 break;
668 }
669 }
670
Peter Korsgaardf242a082008-10-28 08:26:52 +0100671 /*
672 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200673 * plus the size needed for 5 fdt_add_mem_rsv, one
674 * for the fdt itself and 4 for a possible initrd
675 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100676 */
Kumar Gala3082d232008-08-15 08:24:42 -0500677 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200678 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500679
Hannes Schmelzeref476832016-09-20 18:10:43 +0200680 actualsize += extrasize;
Kumar Gala3082d232008-08-15 08:24:42 -0500681 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000682 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
683 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500684
685 /* Change the fdt header to reflect the correct size */
686 fdt_set_totalsize(blob, actualsize);
687
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200688 if (fdt_memrsv) {
689 /* Add the new reservation */
690 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
691 if (ret < 0)
692 return ret;
693 }
Kumar Gala3082d232008-08-15 08:24:42 -0500694
695 return actualsize;
696}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500697
698#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500699#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500700
701#define FDT_PCI_PREFETCH (0x40000000)
702#define FDT_PCI_MEM32 (0x02000000)
703#define FDT_PCI_IO (0x01000000)
704#define FDT_PCI_MEM64 (0x03000000)
705
706int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
707
708 int addrcell, sizecell, len, r;
709 u32 *dma_range;
710 /* sized based on pci addr cells, size-cells, & address-cells */
711 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
712
713 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
714 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
715
716 dma_range = &dma_ranges[0];
717 for (r = 0; r < hose->region_count; r++) {
718 u64 bus_start, phys_start, size;
719
Kumar Galaff4e66e2009-02-06 09:49:31 -0600720 /* skip if !PCI_REGION_SYS_MEMORY */
721 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500722 continue;
723
724 bus_start = (u64)hose->regions[r].bus_start;
725 phys_start = (u64)hose->regions[r].phys_start;
726 size = (u64)hose->regions[r].size;
727
728 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500729 if (size >= 0x100000000ull)
Marek Vasut867aaf62019-07-09 02:49:29 +0200730 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500731 else
Marek Vasut867aaf62019-07-09 02:49:29 +0200732 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500733 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
Marek Vasut867aaf62019-07-09 02:49:29 +0200734 dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500735#ifdef CONFIG_SYS_PCI_64BIT
Marek Vasut867aaf62019-07-09 02:49:29 +0200736 dma_range[1] = cpu_to_fdt32(bus_start >> 32);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500737#else
738 dma_range[1] = 0;
739#endif
Marek Vasut867aaf62019-07-09 02:49:29 +0200740 dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500741
742 if (addrcell == 2) {
Marek Vasut867aaf62019-07-09 02:49:29 +0200743 dma_range[3] = cpu_to_fdt32(phys_start >> 32);
744 dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500745 } else {
Marek Vasut867aaf62019-07-09 02:49:29 +0200746 dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500747 }
748
749 if (sizecell == 2) {
Marek Vasut867aaf62019-07-09 02:49:29 +0200750 dma_range[3 + addrcell + 0] =
751 cpu_to_fdt32(size >> 32);
752 dma_range[3 + addrcell + 1] =
753 cpu_to_fdt32(size & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500754 } else {
Marek Vasut867aaf62019-07-09 02:49:29 +0200755 dma_range[3 + addrcell + 0] =
756 cpu_to_fdt32(size & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500757 }
758
759 dma_range += (3 + addrcell + sizecell);
760 }
761
762 len = dma_range - &dma_ranges[0];
763 if (len)
764 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
765
766 return 0;
767}
768#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200769
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200770int fdt_increase_size(void *fdt, int add_len)
771{
772 int newlen;
773
774 newlen = fdt_totalsize(fdt) + add_len;
775
776 /* Open in place with a new len */
777 return fdt_open_into(fdt, fdt, newlen);
778}
779
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100780#ifdef CONFIG_FDT_FIXUP_PARTITIONS
781#include <jffs2/load_kernel.h>
782#include <mtd_node.h>
783
Michal Simekcd1457d2018-07-31 14:31:04 +0200784static int fdt_del_subnodes(const void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100785{
786 int off, ndepth;
787 int ret;
788
789 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
790 (off >= 0) && (ndepth > 0);
791 off = fdt_next_node(blob, off, &ndepth)) {
792 if (ndepth == 1) {
793 debug("delete %s: offset: %x\n",
794 fdt_get_name(blob, off, 0), off);
795 ret = fdt_del_node((void *)blob, off);
796 if (ret < 0) {
797 printf("Can't delete node: %s\n",
798 fdt_strerror(ret));
799 return ret;
800 } else {
801 ndepth = 0;
802 off = parent_offset;
803 }
804 }
805 }
806 return 0;
807}
808
Michal Simekcd1457d2018-07-31 14:31:04 +0200809static int fdt_del_partitions(void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100810{
811 const void *prop;
812 int ndepth = 0;
813 int off;
814 int ret;
815
816 off = fdt_next_node(blob, parent_offset, &ndepth);
817 if (off > 0 && ndepth == 1) {
818 prop = fdt_getprop(blob, off, "label", NULL);
819 if (prop == NULL) {
820 /*
821 * Could not find label property, nand {}; node?
822 * Check subnode, delete partitions there if any.
823 */
824 return fdt_del_partitions(blob, off);
825 } else {
826 ret = fdt_del_subnodes(blob, parent_offset);
827 if (ret < 0) {
828 printf("Can't remove subnodes: %s\n",
829 fdt_strerror(ret));
830 return ret;
831 }
832 }
833 }
834 return 0;
835}
836
Masahiro Yamada8ce8e422020-07-15 19:35:47 +0900837static int fdt_node_set_part_info(void *blob, int parent_offset,
838 struct mtd_device *dev)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100839{
840 struct list_head *pentry;
841 struct part_info *part;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100842 int off, ndepth = 0;
843 int part_num, ret;
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300844 int sizecell;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100845 char buf[64];
846
847 ret = fdt_del_partitions(blob, parent_offset);
848 if (ret < 0)
849 return ret;
850
851 /*
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300852 * Check if size/address is 1 or 2 cells.
853 * We assume #address-cells and #size-cells have same value.
854 */
855 sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
856 0, "#size-cells", 1);
857
858 /*
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100859 * Check if it is nand {}; subnode, adjust
860 * the offset in this case
861 */
862 off = fdt_next_node(blob, parent_offset, &ndepth);
863 if (off > 0 && ndepth == 1)
864 parent_offset = off;
865
866 part_num = 0;
867 list_for_each_prev(pentry, &dev->parts) {
868 int newoff;
869
870 part = list_entry(pentry, struct part_info, link);
871
Scott Wood06503f12013-10-15 17:41:27 -0500872 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100873 part_num, part->name, part->size,
874 part->offset, part->mask_flags);
875
Scott Wood06503f12013-10-15 17:41:27 -0500876 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100877add_sub:
878 ret = fdt_add_subnode(blob, parent_offset, buf);
879 if (ret == -FDT_ERR_NOSPACE) {
880 ret = fdt_increase_size(blob, 512);
881 if (!ret)
882 goto add_sub;
883 else
884 goto err_size;
885 } else if (ret < 0) {
886 printf("Can't add partition node: %s\n",
887 fdt_strerror(ret));
888 return ret;
889 }
890 newoff = ret;
891
892 /* Check MTD_WRITEABLE_CMD flag */
893 if (part->mask_flags & 1) {
894add_ro:
895 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
896 if (ret == -FDT_ERR_NOSPACE) {
897 ret = fdt_increase_size(blob, 512);
898 if (!ret)
899 goto add_ro;
900 else
901 goto err_size;
902 } else if (ret < 0)
903 goto err_prop;
904 }
905
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100906add_reg:
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300907 if (sizecell == 2) {
908 ret = fdt_setprop_u64(blob, newoff,
909 "reg", part->offset);
910 if (!ret)
911 ret = fdt_appendprop_u64(blob, newoff,
912 "reg", part->size);
913 } else {
914 ret = fdt_setprop_u32(blob, newoff,
915 "reg", part->offset);
916 if (!ret)
917 ret = fdt_appendprop_u32(blob, newoff,
918 "reg", part->size);
919 }
920
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100921 if (ret == -FDT_ERR_NOSPACE) {
922 ret = fdt_increase_size(blob, 512);
923 if (!ret)
924 goto add_reg;
925 else
926 goto err_size;
927 } else if (ret < 0)
928 goto err_prop;
929
930add_label:
931 ret = fdt_setprop_string(blob, newoff, "label", part->name);
932 if (ret == -FDT_ERR_NOSPACE) {
933 ret = fdt_increase_size(blob, 512);
934 if (!ret)
935 goto add_label;
936 else
937 goto err_size;
938 } else if (ret < 0)
939 goto err_prop;
940
941 part_num++;
942 }
943 return 0;
944err_size:
945 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
946 return ret;
947err_prop:
948 printf("Can't add property: %s\n", fdt_strerror(ret));
949 return ret;
950}
951
952/*
953 * Update partitions in nor/nand nodes using info from
954 * mtdparts environment variable. The nodes to update are
955 * specified by node_info structure which contains mtd device
956 * type and compatible string: E. g. the board code in
957 * ft_board_setup() could use:
958 *
959 * struct node_info nodes[] = {
960 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
961 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
962 * };
963 *
964 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
965 */
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900966void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
967 int node_info_size)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100968{
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100969 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100970 int i, idx;
971 int noff;
Masahiro Yamada53a89662020-07-17 10:46:18 +0900972 bool inited = false;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100973
974 for (i = 0; i < node_info_size; i++) {
975 idx = 0;
Masahiro Yamada7d8073e2020-07-17 10:46:19 +0900976 noff = -1;
977
978 while ((noff = fdt_node_offset_by_compatible(blob, noff,
979 node_info[i].compat)) >= 0) {
980 const char *prop;
981
982 prop = fdt_getprop(blob, noff, "status", NULL);
983 if (prop && !strcmp(prop, "disabled"))
984 continue;
985
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100986 debug("%s: %s, mtd dev type %d\n",
987 fdt_get_name(blob, noff, 0),
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900988 node_info[i].compat, node_info[i].type);
Masahiro Yamada53a89662020-07-17 10:46:18 +0900989
990 if (!inited) {
991 if (mtdparts_init() != 0)
992 return;
993 inited = true;
994 }
995
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900996 dev = device_find(node_info[i].type, idx++);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100997 if (dev) {
998 if (fdt_node_set_part_info(blob, noff, dev))
999 return; /* return on error */
1000 }
Anatolij Gustschin3c950e22010-03-16 17:10:05 +01001001 }
1002 }
1003}
1004#endif
Kumar Gala49b97d92010-03-30 10:19:26 -05001005
1006void fdt_del_node_and_alias(void *blob, const char *alias)
1007{
1008 int off = fdt_path_offset(blob, alias);
1009
1010 if (off < 0)
1011 return;
1012
1013 fdt_del_node(blob, off);
1014
1015 off = fdt_path_offset(blob, "/aliases");
1016 fdt_delprop(blob, off, alias);
1017}
Kumar Galaa0342c02010-06-16 14:27:38 -05001018
Kumar Galaa0342c02010-06-16 14:27:38 -05001019/* Max address size we deal with */
1020#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -08001021#define OF_BAD_ADDR FDT_ADDR_T_NONE
Dario Binacchia47abd72021-05-01 17:05:26 +02001022#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
1023 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -05001024
1025/* Debug utility */
1026#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001027static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001028{
1029 printf("%s", s);
1030 while(na--)
1031 printf(" %08x", *(addr++));
1032 printf("\n");
1033}
1034#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001035static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -05001036#endif
1037
Paul Burton0a222d52016-05-17 07:43:24 +01001038/**
1039 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +01001040 * @name: A string used to identify this bus in debug output.
1041 * @addresses: The name of the DT property from which addresses are
1042 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +01001043 * @match: Return non-zero if the node whose parent is at
1044 * parentoffset in the FDT blob corresponds to a bus
1045 * of this type, otherwise return zero. If NULL a match
1046 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +01001047 * @count_cells:Count how many cells (be32 values) a node whose parent
1048 * is at parentoffset in the FDT blob will require to
1049 * represent its address (written to *addrc) & size
1050 * (written to *sizec).
1051 * @map: Map the address addr from the address space of this
1052 * bus to that of its parent, making use of the ranges
1053 * read from DT to an array at range. na and ns are the
1054 * number of cells (be32 values) used to hold and address
1055 * or size, respectively, for this bus. pna is the number
1056 * of cells used to hold an address for the parent bus.
1057 * Returns the address in the address space of the parent
1058 * bus.
1059 * @translate: Update the value of the address cells at addr within an
1060 * FDT by adding offset to it. na specifies the number of
1061 * cells used to hold the address being translated. Returns
1062 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +01001063 *
1064 * Each bus type will include a struct of_bus in the of_busses array,
1065 * providing implementations of some or all of the functions used to
1066 * match the bus & handle address translation for its children.
1067 */
Kumar Galaa0342c02010-06-16 14:27:38 -05001068struct of_bus {
1069 const char *name;
1070 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -06001071 int (*match)(const void *blob, int parentoffset);
1072 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001073 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001074 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001075 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001076 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001077};
1078
1079/* Default translator (generic bus) */
Simon Glasseed36602017-05-18 20:09:26 -06001080void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001081 int *addrc, int *sizec)
1082{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001083 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -05001084
Simon Glass933cdbb2014-10-23 18:58:57 -06001085 if (addrc)
1086 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -05001087
1088 if (sizec) {
1089 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1090 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001091 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -05001092 else
1093 *sizec = 1;
1094 }
Kumar Galaa0342c02010-06-16 14:27:38 -05001095}
1096
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001097static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001098 int na, int ns, int pna)
1099{
1100 u64 cp, s, da;
1101
Simon Glasseed36602017-05-18 20:09:26 -06001102 cp = fdt_read_number(range, na);
1103 s = fdt_read_number(range + na + pna, ns);
1104 da = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001105
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301106 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001107
1108 if (da < cp || da >= (cp + s))
1109 return OF_BAD_ADDR;
1110 return da - cp;
1111}
1112
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001113static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001114{
Simon Glasseed36602017-05-18 20:09:26 -06001115 u64 a = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001116 memset(addr, 0, na * 4);
1117 a += offset;
1118 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001119 addr[na - 2] = cpu_to_fdt32(a >> 32);
1120 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001121
1122 return 0;
1123}
1124
Paul Burton0a222d52016-05-17 07:43:24 +01001125#ifdef CONFIG_OF_ISA_BUS
1126
1127/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001128static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001129{
1130 const char *name;
1131
1132 name = fdt_get_name(blob, parentoffset, NULL);
1133 if (!name)
1134 return 0;
1135
1136 return !strcmp(name, "isa");
1137}
1138
Stephen Warren11e44fc2016-08-05 09:47:50 -06001139static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +01001140 int *addrc, int *sizec)
1141{
1142 if (addrc)
1143 *addrc = 2;
1144 if (sizec)
1145 *sizec = 1;
1146}
1147
1148static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1149 int na, int ns, int pna)
1150{
1151 u64 cp, s, da;
1152
1153 /* Check address type match */
1154 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1155 return OF_BAD_ADDR;
1156
Simon Glasseed36602017-05-18 20:09:26 -06001157 cp = fdt_read_number(range + 1, na - 1);
1158 s = fdt_read_number(range + na + pna, ns);
1159 da = fdt_read_number(addr + 1, na - 1);
Paul Burton0a222d52016-05-17 07:43:24 +01001160
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301161 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Paul Burton0a222d52016-05-17 07:43:24 +01001162
1163 if (da < cp || da >= (cp + s))
1164 return OF_BAD_ADDR;
1165 return da - cp;
1166}
1167
1168static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1169{
1170 return of_bus_default_translate(addr + 1, offset, na - 1);
1171}
1172
1173#endif /* CONFIG_OF_ISA_BUS */
1174
Kumar Galaa0342c02010-06-16 14:27:38 -05001175/* Array of bus specific translators */
1176static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001177#ifdef CONFIG_OF_ISA_BUS
1178 /* ISA */
1179 {
1180 .name = "isa",
1181 .addresses = "reg",
1182 .match = of_bus_isa_match,
1183 .count_cells = of_bus_isa_count_cells,
1184 .map = of_bus_isa_map,
1185 .translate = of_bus_isa_translate,
1186 },
1187#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001188 /* Default */
1189 {
1190 .name = "default",
1191 .addresses = "reg",
Simon Glasseed36602017-05-18 20:09:26 -06001192 .count_cells = fdt_support_default_count_cells,
Kumar Galaa0342c02010-06-16 14:27:38 -05001193 .map = of_bus_default_map,
1194 .translate = of_bus_default_translate,
1195 },
1196};
1197
Stephen Warren11e44fc2016-08-05 09:47:50 -06001198static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001199{
1200 struct of_bus *bus;
1201
1202 if (ARRAY_SIZE(of_busses) == 1)
1203 return of_busses;
1204
1205 for (bus = of_busses; bus; bus++) {
1206 if (!bus->match || bus->match(blob, parentoffset))
1207 return bus;
1208 }
1209
1210 /*
1211 * We should always have matched the default bus at least, since
1212 * it has a NULL match field. If we didn't then it somehow isn't
1213 * in the of_busses array or something equally catastrophic has
1214 * gone wrong.
1215 */
1216 assert(0);
1217 return NULL;
1218}
1219
Stephen Warren11e44fc2016-08-05 09:47:50 -06001220static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001221 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001222 int na, int ns, int pna, const char *rprop)
1223{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001224 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001225 int rlen;
1226 int rone;
1227 u64 offset = OF_BAD_ADDR;
1228
1229 /* Normally, an absence of a "ranges" property means we are
1230 * crossing a non-translatable boundary, and thus the addresses
1231 * below the current not cannot be converted to CPU physical ones.
1232 * Unfortunately, while this is very clear in the spec, it's not
1233 * what Apple understood, and they do have things like /uni-n or
1234 * /ht nodes with no "ranges" property and a lot of perfectly
1235 * useable mapped devices below them. Thus we treat the absence of
1236 * "ranges" as equivalent to an empty "ranges" property which means
1237 * a 1:1 translation at that level. It's up to the caller not to try
1238 * to translate addresses that aren't supposed to be translated in
1239 * the first place. --BenH.
1240 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001241 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001242 if (ranges == NULL || rlen == 0) {
Simon Glasseed36602017-05-18 20:09:26 -06001243 offset = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001244 memset(addr, 0, pna * 4);
1245 debug("OF: no ranges, 1:1 translation\n");
1246 goto finish;
1247 }
1248
1249 debug("OF: walking ranges...\n");
1250
1251 /* Now walk through the ranges */
1252 rlen /= 4;
1253 rone = na + pna + ns;
1254 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1255 offset = bus->map(addr, ranges, na, ns, pna);
1256 if (offset != OF_BAD_ADDR)
1257 break;
1258 }
1259 if (offset == OF_BAD_ADDR) {
1260 debug("OF: not found !\n");
1261 return 1;
1262 }
1263 memcpy(addr, ranges + na, 4 * pna);
1264
1265 finish:
1266 of_dump_addr("OF: parent translation for:", addr, pna);
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001267 debug("OF: with offset: %llu\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001268
1269 /* Translate it into parent bus space */
1270 return pbus->translate(addr, offset, pna);
1271}
1272
1273/*
1274 * Translate an address from the device-tree into a CPU physical address,
1275 * this walks up the tree and applies the various bus mappings on the
1276 * way.
1277 *
1278 * Note: We consider that crossing any level with #size-cells == 0 to mean
1279 * that translation is impossible (that is we are not dealing with a value
1280 * that can be mapped to a cpu physical address). This is not really specified
1281 * that way, but this is traditionally the way IBM at least do things
1282 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001283static u64 __of_translate_address(const void *blob, int node_offset,
1284 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001285{
1286 int parent;
1287 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001288 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001289 int na, ns, pna, pns;
1290 u64 result = OF_BAD_ADDR;
1291
1292 debug("OF: ** translation for device %s **\n",
1293 fdt_get_name(blob, node_offset, NULL));
1294
1295 /* Get parent & match bus type */
1296 parent = fdt_parent_offset(blob, node_offset);
1297 if (parent < 0)
1298 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001299 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001300
1301 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001302 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001303 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001304 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1305 fdt_get_name(blob, node_offset, NULL));
1306 goto bail;
1307 }
1308 memcpy(addr, in_addr, na * 4);
1309
1310 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1311 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1312 of_dump_addr("OF: translating address:", addr, na);
1313
1314 /* Translate */
1315 for (;;) {
1316 /* Switch to parent bus */
1317 node_offset = parent;
1318 parent = fdt_parent_offset(blob, node_offset);
1319
1320 /* If root, we have finished */
1321 if (parent < 0) {
1322 debug("OF: reached root node\n");
Simon Glasseed36602017-05-18 20:09:26 -06001323 result = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001324 break;
1325 }
1326
1327 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001328 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001329 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001330 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001331 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1332 fdt_get_name(blob, node_offset, NULL));
1333 break;
1334 }
1335
1336 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1337 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1338
1339 /* Apply bus translation */
1340 if (of_translate_one(blob, node_offset, bus, pbus,
1341 addr, na, ns, pna, rprop))
1342 break;
1343
1344 /* Complete the move up one level */
1345 na = pna;
1346 ns = pns;
1347 bus = pbus;
1348
1349 of_dump_addr("OF: one level translation:", addr, na);
1350 }
1351 bail:
1352
1353 return result;
1354}
1355
Stephen Warren11e44fc2016-08-05 09:47:50 -06001356u64 fdt_translate_address(const void *blob, int node_offset,
1357 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001358{
1359 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1360}
Kumar Gala75e73af2010-07-04 12:48:21 -05001361
Fabien Dessenne641067f2019-05-31 15:11:30 +02001362u64 fdt_translate_dma_address(const void *blob, int node_offset,
1363 const fdt32_t *in_addr)
1364{
1365 return __of_translate_address(blob, node_offset, in_addr, "dma-ranges");
1366}
1367
Nicolas Saenz Julienne51bdb502021-01-12 13:55:22 +01001368int fdt_get_dma_range(const void *blob, int node, phys_addr_t *cpu,
1369 dma_addr_t *bus, u64 *size)
1370{
1371 bool found_dma_ranges = false;
1372 struct of_bus *bus_node;
1373 const fdt32_t *ranges;
1374 int na, ns, pna, pns;
1375 int parent = node;
1376 int ret = 0;
1377 int len;
1378
1379 /* Find the closest dma-ranges property */
1380 while (parent >= 0) {
1381 ranges = fdt_getprop(blob, parent, "dma-ranges", &len);
1382
1383 /* Ignore empty ranges, they imply no translation required */
1384 if (ranges && len > 0)
1385 break;
1386
1387 /* Once we find 'dma-ranges', then a missing one is an error */
1388 if (found_dma_ranges && !ranges) {
1389 ret = -EINVAL;
1390 goto out;
1391 }
1392
1393 if (ranges)
1394 found_dma_ranges = true;
1395
1396 parent = fdt_parent_offset(blob, parent);
1397 }
1398
1399 if (!ranges || parent < 0) {
1400 debug("no dma-ranges found for node %s\n",
1401 fdt_get_name(blob, node, NULL));
1402 ret = -ENOENT;
1403 goto out;
1404 }
1405
1406 /* switch to that node */
1407 node = parent;
1408 parent = fdt_parent_offset(blob, node);
1409 if (parent < 0) {
1410 printf("Found dma-ranges in root node, shoudln't happen\n");
1411 ret = -EINVAL;
1412 goto out;
1413 }
1414
1415 /* Get the address sizes both for the bus and its parent */
1416 bus_node = of_match_bus(blob, node);
1417 bus_node->count_cells(blob, node, &na, &ns);
1418 if (!OF_CHECK_COUNTS(na, ns)) {
1419 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1420 fdt_get_name(blob, node, NULL));
1421 return -EINVAL;
1422 goto out;
1423 }
1424
1425 bus_node = of_match_bus(blob, parent);
1426 bus_node->count_cells(blob, parent, &pna, &pns);
1427 if (!OF_CHECK_COUNTS(pna, pns)) {
1428 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1429 fdt_get_name(blob, parent, NULL));
1430 return -EINVAL;
1431 goto out;
1432 }
1433
1434 *bus = fdt_read_number(ranges, na);
1435 *cpu = fdt_translate_dma_address(blob, node, ranges + na);
1436 *size = fdt_read_number(ranges + na + pna, ns);
1437out:
1438 return ret;
1439}
1440
Kumar Gala75e73af2010-07-04 12:48:21 -05001441/**
1442 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1443 * who's reg property matches a physical cpu address
1444 *
1445 * @blob: ptr to device tree
1446 * @compat: compatiable string to match
1447 * @compat_off: property name
1448 *
1449 */
1450int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1451 phys_addr_t compat_off)
1452{
1453 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1454 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001455 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001456 if (reg) {
1457 if (compat_off == fdt_translate_address(blob, off, reg))
1458 return off;
1459 }
1460 off = fdt_node_offset_by_compatible(blob, off, compat);
1461 }
1462
1463 return -FDT_ERR_NOTFOUND;
1464}
1465
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001466/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001467 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001468 *
1469 * @fdt: ptr to device tree
1470 * @nodeoffset: node to update
1471 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001472 */
1473int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001474{
1475 int ret;
1476
1477#ifdef DEBUG
1478 int off = fdt_node_offset_by_phandle(fdt, phandle);
1479
1480 if ((off >= 0) && (off != nodeoffset)) {
1481 char buf[64];
1482
1483 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1484 printf("Trying to update node %s with phandle %u ",
1485 buf, phandle);
1486
1487 fdt_get_path(fdt, off, buf, sizeof(buf));
1488 printf("that already exists in node %s.\n", buf);
1489 return -FDT_ERR_BADPHANDLE;
1490 }
1491#endif
1492
1493 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1494 if (ret < 0)
1495 return ret;
1496
1497 /*
1498 * For now, also set the deprecated "linux,phandle" property, so that we
1499 * don't break older kernels.
1500 */
1501 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1502
1503 return ret;
1504}
1505
Kumar Gala10aeabd2011-08-01 00:25:20 -05001506/*
1507 * fdt_create_phandle: Create a phandle property for the given node
1508 *
1509 * @fdt: ptr to device tree
1510 * @nodeoffset: node to update
1511 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001512unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001513{
1514 /* see if there is a phandle already */
Marek Behún76f5a722021-11-26 14:57:07 +01001515 uint32_t phandle = fdt_get_phandle(fdt, nodeoffset);
Kumar Gala10aeabd2011-08-01 00:25:20 -05001516
1517 /* if we got 0, means no phandle so create one */
1518 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001519 int ret;
1520
Marek Behún76f5a722021-11-26 14:57:07 +01001521 ret = fdt_generate_phandle(fdt, &phandle);
1522 if (ret < 0) {
1523 printf("Can't generate phandle: %s\n",
1524 fdt_strerror(ret));
1525 return 0;
1526 }
1527
Timur Tabi3c927cc2011-09-20 18:24:34 -05001528 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1529 if (ret < 0) {
1530 printf("Can't set phandle %u: %s\n", phandle,
1531 fdt_strerror(ret));
1532 return 0;
1533 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001534 }
1535
1536 return phandle;
1537}
1538
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001539/*
1540 * fdt_set_node_status: Set status for the given node
1541 *
1542 * @fdt: ptr to device tree
1543 * @nodeoffset: node to update
Marek Behún2105cd02021-11-26 14:57:08 +01001544 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001545 */
Marek Behún2105cd02021-11-26 14:57:08 +01001546int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status)
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001547{
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001548 int ret = 0;
1549
1550 if (nodeoffset < 0)
1551 return nodeoffset;
1552
1553 switch (status) {
1554 case FDT_STATUS_OKAY:
1555 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1556 break;
1557 case FDT_STATUS_DISABLED:
1558 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1559 break;
1560 case FDT_STATUS_FAIL:
1561 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1562 break;
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001563 default:
1564 printf("Invalid fdt status: %x\n", status);
1565 ret = -1;
1566 break;
1567 }
1568
1569 return ret;
1570}
1571
1572/*
1573 * fdt_set_status_by_alias: Set status for the given node given an alias
1574 *
1575 * @fdt: ptr to device tree
1576 * @alias: alias of node to update
Marek Behún2105cd02021-11-26 14:57:08 +01001577 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001578 */
1579int fdt_set_status_by_alias(void *fdt, const char* alias,
Marek Behún2105cd02021-11-26 14:57:08 +01001580 enum fdt_status status)
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001581{
1582 int offset = fdt_path_offset(fdt, alias);
1583
Marek Behún2105cd02021-11-26 14:57:08 +01001584 return fdt_set_node_status(fdt, offset, status);
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001585}
1586
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001587#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001588int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1589{
1590 int noff;
1591 int ret;
1592
1593 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1594 if (noff != -FDT_ERR_NOTFOUND) {
1595 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1596add_edid:
1597 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1598 if (ret == -FDT_ERR_NOSPACE) {
1599 ret = fdt_increase_size(blob, 512);
1600 if (!ret)
1601 goto add_edid;
1602 else
1603 goto err_size;
1604 } else if (ret < 0) {
1605 printf("Can't add property: %s\n", fdt_strerror(ret));
1606 return ret;
1607 }
1608 }
1609 return 0;
1610err_size:
1611 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1612 return ret;
1613}
1614#endif
Timur Tabibb682002011-05-03 13:24:07 -05001615
1616/*
1617 * Verify the physical address of device tree node for a given alias
1618 *
1619 * This function locates the device tree node of a given alias, and then
1620 * verifies that the physical address of that device matches the given
1621 * parameter. It displays a message if there is a mismatch.
1622 *
1623 * Returns 1 on success, 0 on failure
1624 */
1625int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1626{
1627 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001628 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001629 int node, len;
1630 u64 dt_addr;
1631
1632 path = fdt_getprop(fdt, anode, alias, NULL);
1633 if (!path) {
1634 /* If there's no such alias, then it's not a failure */
1635 return 1;
1636 }
1637
1638 node = fdt_path_offset(fdt, path);
1639 if (node < 0) {
1640 printf("Warning: device tree alias '%s' points to invalid "
1641 "node %s.\n", alias, path);
1642 return 0;
1643 }
1644
1645 reg = fdt_getprop(fdt, node, "reg", &len);
1646 if (!reg) {
1647 printf("Warning: device tree node '%s' has no address.\n",
1648 path);
1649 return 0;
1650 }
1651
1652 dt_addr = fdt_translate_address(fdt, node, reg);
1653 if (addr != dt_addr) {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001654 printf("Warning: U-Boot configured device %s at address %llu,\n"
1655 "but the device tree has it address %llx.\n",
1656 alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001657 return 0;
1658 }
1659
1660 return 1;
1661}
1662
1663/*
1664 * Returns the base address of an SOC or PCI node
1665 */
Simon Glassec002112017-05-18 20:09:00 -06001666u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001667{
1668 int size;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001669 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001670
Simon Glass336a4482017-07-04 13:31:20 -06001671 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabibb682002011-05-03 13:24:07 -05001672
Masahiro Yamadae3665ba2019-06-27 16:39:57 +09001673 return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR;
Timur Tabibb682002011-05-03 13:24:07 -05001674}
Alexander Grafc48e6862014-04-11 17:09:41 +02001675
1676/*
Bin Menga932aa32021-02-25 17:22:24 +08001677 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells,
1678 * or 3 cells specially for a PCI address.
Alexander Grafc48e6862014-04-11 17:09:41 +02001679 */
1680static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1681 uint64_t *val, int cells)
1682{
Bin Menga932aa32021-02-25 17:22:24 +08001683 const fdt32_t *prop32;
1684 const unaligned_fdt64_t *prop64;
Alexander Grafc48e6862014-04-11 17:09:41 +02001685
1686 if ((cell_off + cells) > prop_len)
1687 return -FDT_ERR_NOSPACE;
1688
Bin Menga932aa32021-02-25 17:22:24 +08001689 prop32 = &prop[cell_off];
1690
1691 /*
1692 * Special handling for PCI address in PCI bus <ranges>
1693 *
1694 * PCI child address is made up of 3 cells. Advance the cell offset
1695 * by 1 so that the PCI child address can be correctly read.
1696 */
1697 if (cells == 3)
1698 cell_off += 1;
1699 prop64 = (const fdt64_t *)&prop[cell_off];
1700
Alexander Grafc48e6862014-04-11 17:09:41 +02001701 switch (cells) {
1702 case 1:
1703 *val = fdt32_to_cpu(*prop32);
1704 break;
1705 case 2:
Bin Menga932aa32021-02-25 17:22:24 +08001706 case 3:
Alexander Grafc48e6862014-04-11 17:09:41 +02001707 *val = fdt64_to_cpu(*prop64);
1708 break;
1709 default:
1710 return -FDT_ERR_NOSPACE;
1711 }
1712
1713 return 0;
1714}
1715
1716/**
1717 * fdt_read_range - Read a node's n'th range property
1718 *
1719 * @fdt: ptr to device tree
1720 * @node: offset of node
1721 * @n: range index
1722 * @child_addr: pointer to storage for the "child address" field
1723 * @addr: pointer to storage for the CPU view translated physical start
1724 * @len: pointer to storage for the range length
1725 *
1726 * Convenience function that reads and interprets a specific range out of
1727 * a number of the "ranges" property array.
1728 */
1729int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1730 uint64_t *addr, uint64_t *len)
1731{
1732 int pnode = fdt_parent_offset(fdt, node);
1733 const fdt32_t *ranges;
1734 int pacells;
1735 int acells;
1736 int scells;
1737 int ranges_len;
1738 int cell = 0;
1739 int r = 0;
1740
1741 /*
1742 * The "ranges" property is an array of
1743 * { <child address> <parent address> <size in child address space> }
1744 *
1745 * All 3 elements can span a diffent number of cells. Fetch their size.
1746 */
1747 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1748 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1749 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1750
1751 /* Now try to get the ranges property */
1752 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1753 if (!ranges)
1754 return -FDT_ERR_NOTFOUND;
1755 ranges_len /= sizeof(uint32_t);
1756
1757 /* Jump to the n'th entry */
1758 cell = n * (pacells + acells + scells);
1759
1760 /* Read <child address> */
1761 if (child_addr) {
1762 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1763 acells);
1764 if (r)
1765 return r;
1766 }
1767 cell += acells;
1768
1769 /* Read <parent address> */
1770 if (addr)
1771 *addr = fdt_translate_address(fdt, node, ranges + cell);
1772 cell += pacells;
1773
1774 /* Read <size in child address space> */
1775 if (len) {
1776 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1777 if (r)
1778 return r;
1779 }
1780
1781 return 0;
1782}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001783
1784/**
1785 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1786 *
1787 * @fdt: ptr to device tree
1788 * @node: offset of the simplefb node
1789 * @base_address: framebuffer base address
1790 * @width: width in pixels
1791 * @height: height in pixels
1792 * @stride: bytes per line
1793 * @format: pixel format string
1794 *
1795 * Convenience function to fill and enable a simplefb node.
1796 */
1797int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1798 u32 height, u32 stride, const char *format)
1799{
1800 char name[32];
1801 fdt32_t cells[4];
1802 int i, addrc, sizec, ret;
1803
Simon Glasseed36602017-05-18 20:09:26 -06001804 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1805 &addrc, &sizec);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001806 i = 0;
1807 if (addrc == 2)
1808 cells[i++] = cpu_to_fdt32(base_address >> 32);
1809 cells[i++] = cpu_to_fdt32(base_address);
1810 if (sizec == 2)
1811 cells[i++] = 0;
1812 cells[i++] = cpu_to_fdt32(height * stride);
1813
1814 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1815 if (ret < 0)
1816 return ret;
1817
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001818 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001819 ret = fdt_set_name(fdt, node, name);
1820 if (ret < 0)
1821 return ret;
1822
1823 ret = fdt_setprop_u32(fdt, node, "width", width);
1824 if (ret < 0)
1825 return ret;
1826
1827 ret = fdt_setprop_u32(fdt, node, "height", height);
1828 if (ret < 0)
1829 return ret;
1830
1831 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1832 if (ret < 0)
1833 return ret;
1834
1835 ret = fdt_setprop_string(fdt, node, "format", format);
1836 if (ret < 0)
1837 return ret;
1838
1839 ret = fdt_setprop_string(fdt, node, "status", "okay");
1840 if (ret < 0)
1841 return ret;
1842
1843 return 0;
1844}
Tim Harvey08daa252015-04-08 11:45:39 -07001845
1846/*
1847 * Update native-mode in display-timings from display environment variable.
1848 * The node to update are specified by path.
1849 */
1850int fdt_fixup_display(void *blob, const char *path, const char *display)
1851{
1852 int off, toff;
1853
1854 if (!display || !path)
1855 return -FDT_ERR_NOTFOUND;
1856
1857 toff = fdt_path_offset(blob, path);
1858 if (toff >= 0)
1859 toff = fdt_subnode_offset(blob, toff, "display-timings");
1860 if (toff < 0)
1861 return toff;
1862
1863 for (off = fdt_first_subnode(blob, toff);
1864 off >= 0;
1865 off = fdt_next_subnode(blob, off)) {
1866 uint32_t h = fdt_get_phandle(blob, off);
1867 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1868 fdt32_to_cpu(h));
1869 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1870 return fdt_setprop_u32(blob, toff, "native-mode", h);
1871 }
1872 return toff;
1873}
Pantelis Antonioufc7c3182017-09-04 23:12:11 +03001874
1875#ifdef CONFIG_OF_LIBFDT_OVERLAY
1876/**
1877 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1878 *
1879 * @fdt: ptr to device tree
1880 * @fdto: ptr to device tree overlay
1881 *
1882 * Convenience function to apply an overlay and display helpful messages
1883 * in the case of an error
1884 */
1885int fdt_overlay_apply_verbose(void *fdt, void *fdto)
1886{
1887 int err;
1888 bool has_symbols;
1889
1890 err = fdt_path_offset(fdt, "/__symbols__");
1891 has_symbols = err >= 0;
1892
1893 err = fdt_overlay_apply(fdt, fdto);
1894 if (err < 0) {
1895 printf("failed on fdt_overlay_apply(): %s\n",
1896 fdt_strerror(err));
1897 if (!has_symbols) {
1898 printf("base fdt does did not have a /__symbols__ node\n");
1899 printf("make sure you've compiled with -@\n");
1900 }
1901 }
1902 return err;
1903}
1904#endif
Kory Maincentbbdbcaf2021-05-04 19:31:21 +02001905
1906/**
1907 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
1908 *
1909 * @blobp: Pointer to FDT pointer
1910 * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
1911 */
1912int fdt_valid(struct fdt_header **blobp)
1913{
1914 const void *blob = *blobp;
1915 int err;
1916
1917 if (!blob) {
1918 printf("The address of the fdt is invalid (NULL).\n");
1919 return 0;
1920 }
1921
1922 err = fdt_check_header(blob);
1923 if (err == 0)
1924 return 1; /* valid */
1925
1926 if (err < 0) {
1927 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
1928 /*
1929 * Be more informative on bad version.
1930 */
1931 if (err == -FDT_ERR_BADVERSION) {
1932 if (fdt_version(blob) <
1933 FDT_FIRST_SUPPORTED_VERSION) {
1934 printf(" - too old, fdt %d < %d",
1935 fdt_version(blob),
1936 FDT_FIRST_SUPPORTED_VERSION);
1937 }
1938 if (fdt_last_comp_version(blob) >
1939 FDT_LAST_SUPPORTED_VERSION) {
1940 printf(" - too new, fdt %d > %d",
1941 fdt_version(blob),
1942 FDT_LAST_SUPPORTED_VERSION);
1943 }
1944 }
1945 printf("\n");
1946 *blobp = NULL;
1947 return 0;
1948 }
1949 return 1;
1950}