blob: 10648b5a4a86e0d94765b94b02af7b0e4ca9fc76 [file] [log] [blame]
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04001/*
2 * (C) Copyright 2007
3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4 *
Shengzhou Liu2a523f52011-10-14 16:26:05 +08005 * Copyright 2010-2011 Freescale Semiconductor, Inc.
Kumar Galaa0342c02010-06-16 14:27:38 -05006 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02007 * SPDX-License-Identifier: GPL-2.0+
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04008 */
9
10#include <common.h>
Simon Glasse48f3742014-11-11 12:47:07 -070011#include <inttypes.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040012#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040013#include <linux/ctype.h>
14#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040015#include <asm/global_data.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040016#include <libfdt.h>
17#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060018#include <exports.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040019
Kumar Gala3bed2aa2008-10-23 00:05:47 -050020/**
Alexander Graf94fb1822014-04-11 17:09:40 +020021 * fdt_getprop_u32_default_node - Return a node's property or a default
22 *
23 * @fdt: ptr to device tree
24 * @off: offset of node
25 * @cell: cell offset in property
26 * @prop: property name
27 * @dflt: default value if the property isn't found
28 *
29 * Convenience function to return a node's property or a default value if
30 * the property doesn't exist.
31 */
32u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
33 const char *prop, const u32 dflt)
34{
35 const fdt32_t *val;
36 int len;
37
38 val = fdt_getprop(fdt, off, prop, &len);
39
40 /* Check if property exists */
41 if (!val)
42 return dflt;
43
44 /* Check if property is long enough */
45 if (len < ((cell + 1) * sizeof(uint32_t)))
46 return dflt;
47
48 return fdt32_to_cpu(*val);
49}
50
51/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050052 * fdt_getprop_u32_default - Find a node and return it's property or a default
53 *
54 * @fdt: ptr to device tree
55 * @path: path of node
56 * @prop: property name
57 * @dflt: default value if the property isn't found
58 *
59 * Convenience function to find a node and return it's property or a
60 * default value if it doesn't exist.
61 */
Gabe Black07e12782011-11-08 01:09:44 -080062u32 fdt_getprop_u32_default(const void *fdt, const char *path,
63 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050064{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050065 int off;
66
67 off = fdt_path_offset(fdt, path);
68 if (off < 0)
69 return dflt;
70
Alexander Graf94fb1822014-04-11 17:09:40 +020071 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050072}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040073
Kumar Galaa3c29332007-10-24 10:21:57 -050074/**
75 * fdt_find_and_setprop: Find a node and set it's property
76 *
77 * @fdt: ptr to device tree
78 * @node: path of node
79 * @prop: property name
80 * @val: ptr to new value
81 * @len: length of new property value
82 * @create: flag to create the property if it doesn't exist
83 *
84 * Convenience function to directly set a property given the path to the node.
85 */
86int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
87 const void *val, int len, int create)
88{
Kumar Gala8d04f022007-10-24 11:04:22 -050089 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050090
91 if (nodeoff < 0)
92 return nodeoff;
93
Kim Phillips8aa5ec62013-01-16 14:00:11 +000094 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -050095 return 0; /* create flag not set; so exit quietly */
96
97 return fdt_setprop(fdt, nodeoff, prop, val, len);
98}
99
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900100/**
Simon Glassa9e8e292014-10-23 18:58:49 -0600101 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
102 *
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900103 * @fdt: pointer to the device tree blob
104 * @parentoffset: structure block offset of a node
105 * @name: name of the subnode to locate
106 *
107 * fdt_subnode_offset() finds a subnode of the node with a given name.
108 * If the subnode does not exist, it will be created.
109 */
Simon Glassa9e8e292014-10-23 18:58:49 -0600110int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900111{
112 int offset;
113
114 offset = fdt_subnode_offset(fdt, parentoffset, name);
115
116 if (offset == -FDT_ERR_NOTFOUND)
117 offset = fdt_add_subnode(fdt, parentoffset, name);
118
119 if (offset < 0)
120 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
121
122 return offset;
123}
124
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900125/* rename to CONFIG_OF_STDOUT_PATH ? */
126#if defined(OF_STDOUT_PATH)
127static int fdt_fixup_stdout(void *fdt, int chosenoff)
128{
129 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
130 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
131}
132#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400133static void fdt_fill_multisername(char *sername, size_t maxlen)
134{
135 const char *outname = stdio_devices[stdout]->name;
136
137 if (strcmp(outname, "serial") > 0)
138 strncpy(sername, outname, maxlen);
139
140 /* eserial? */
141 if (strcmp(outname + 1, "serial") > 0)
142 strncpy(sername, outname + 1, maxlen);
143}
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400144
Detlev Zundel40777812008-06-20 22:24:05 +0200145static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600146{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900147 int err;
148 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600149 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900150 const void *path;
151 int len;
152 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600153
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400154 fdt_fill_multisername(sername, sizeof(sername) - 1);
155 if (!sername[0])
156 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600157
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900158 aliasoff = fdt_path_offset(fdt, "/aliases");
159 if (aliasoff < 0) {
160 err = aliasoff;
161 goto error;
Kumar Gala151c8b02007-11-26 17:06:15 -0600162 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900163
164 path = fdt_getprop(fdt, aliasoff, sername, &len);
165 if (!path) {
166 err = len;
167 goto error;
168 }
169
170 /* fdt_setprop may break "path" so we copy it to tmp buffer */
171 memcpy(tmp, path, len);
172
173 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
174error:
Kumar Gala151c8b02007-11-26 17:06:15 -0600175 if (err < 0)
176 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900177 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600178
179 return err;
180}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900181#else
182static int fdt_fixup_stdout(void *fdt, int chosenoff)
183{
184 return 0;
185}
Kumar Gala151c8b02007-11-26 17:06:15 -0600186#endif
187
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900188static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
189 uint64_t val, int is_u64)
190{
191 if (is_u64)
192 return fdt_setprop_u64(fdt, nodeoffset, name, val);
193 else
194 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
195}
196
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200197int fdt_root(void *fdt)
198{
199 char *serial;
200 int err;
201
202 err = fdt_check_header(fdt);
203 if (err < 0) {
204 printf("fdt_root: %s\n", fdt_strerror(err));
205 return err;
206 }
207
208 serial = getenv("serial#");
209 if (serial) {
210 err = fdt_setprop(fdt, 0, "serial-number", serial,
211 strlen(serial) + 1);
212
213 if (err < 0) {
214 printf("WARNING: could not set serial-number %s.\n",
215 fdt_strerror(err));
216 return err;
217 }
218 }
219
220 return 0;
221}
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900222
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900223int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500224{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900225 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500226 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900227 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500228 uint64_t addr, size;
229
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900230 /* just return if the size of initrd is zero */
231 if (initrd_start == initrd_end)
232 return 0;
233
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900234 /* find or create "/chosen" node. */
235 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
236 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500237 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500238
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500239 total = fdt_num_mem_rsv(fdt);
240
241 /*
242 * Look for an existing entry and update it. If we don't find
243 * the entry, we will j be the next available slot.
244 */
245 for (j = 0; j < total; j++) {
246 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
247 if (addr == initrd_start) {
248 fdt_del_mem_rsv(fdt, j);
249 break;
250 }
251 }
252
Grant Likelyce6b27a2011-03-28 09:58:55 +0000253 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500254 if (err < 0) {
255 printf("fdt_initrd: %s\n", fdt_strerror(err));
256 return err;
257 }
258
Simon Glass933cdbb2014-10-23 18:58:57 -0600259 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800260
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900261 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
262 (uint64_t)initrd_start, is_u64);
263
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900264 if (err < 0) {
265 printf("WARNING: could not set linux,initrd-start %s.\n",
266 fdt_strerror(err));
267 return err;
268 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900269
270 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
271 (uint64_t)initrd_end, is_u64);
272
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900273 if (err < 0) {
274 printf("WARNING: could not set linux,initrd-end %s.\n",
275 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500276
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900277 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500278 }
279
280 return 0;
281}
282
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900283int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400284{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400285 int nodeoffset;
286 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400287 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400288
289 err = fdt_check_header(fdt);
290 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400291 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400292 return err;
293 }
294
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900295 /* find or create "/chosen" node. */
296 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
297 if (nodeoffset < 0)
298 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400299
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400300 str = getenv("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900301 if (str) {
302 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
303 strlen(str) + 1);
304 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900305 printf("WARNING: could not set bootargs %s.\n",
306 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900307 return err;
308 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400309 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500310
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900311 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400312}
313
Kumar Galae93becf2007-11-03 19:46:28 -0500314void do_fixup_by_path(void *fdt, const char *path, const char *prop,
315 const void *val, int len, int create)
316{
317#if defined(DEBUG)
318 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600319 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500320 for (i = 0; i < len; i++)
321 debug(" %.2x", *(u8*)(val+i));
322 debug("\n");
323#endif
324 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
325 if (rc)
326 printf("Unable to update property %s:%s, err=%s\n",
327 path, prop, fdt_strerror(rc));
328}
329
330void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
331 u32 val, int create)
332{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000333 fdt32_t tmp = cpu_to_fdt32(val);
334 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500335}
336
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600337void do_fixup_by_prop(void *fdt,
338 const char *pname, const void *pval, int plen,
339 const char *prop, const void *val, int len,
340 int create)
341{
342 int off;
343#if defined(DEBUG)
344 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600345 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600346 for (i = 0; i < len; i++)
347 debug(" %.2x", *(u8*)(val+i));
348 debug("\n");
349#endif
350 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
351 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000352 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600353 fdt_setprop(fdt, off, prop, val, len);
354 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
355 }
356}
357
358void do_fixup_by_prop_u32(void *fdt,
359 const char *pname, const void *pval, int plen,
360 const char *prop, u32 val, int create)
361{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000362 fdt32_t tmp = cpu_to_fdt32(val);
363 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600364}
365
366void do_fixup_by_compat(void *fdt, const char *compat,
367 const char *prop, const void *val, int len, int create)
368{
369 int off = -1;
370#if defined(DEBUG)
371 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600372 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600373 for (i = 0; i < len; i++)
374 debug(" %.2x", *(u8*)(val+i));
375 debug("\n");
376#endif
377 off = fdt_node_offset_by_compatible(fdt, -1, compat);
378 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000379 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600380 fdt_setprop(fdt, off, prop, val, len);
381 off = fdt_node_offset_by_compatible(fdt, off, compat);
382 }
383}
384
385void do_fixup_by_compat_u32(void *fdt, const char *compat,
386 const char *prop, u32 val, int create)
387{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000388 fdt32_t tmp = cpu_to_fdt32(val);
389 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600390}
391
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900392/*
393 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
394 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600395static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
396 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900397{
398 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100399 int address_cells = fdt_address_cells(fdt, 0);
400 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900401 char *p = buf;
402
403 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100404 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900405 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
406 else
407 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100408 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900409
Hans de Goedeffccb842014-11-28 14:23:51 +0100410 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900411 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
412 else
413 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100414 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900415 }
416
417 return p - (char *)buf;
418}
419
Doug Anderson5e574542013-04-30 10:22:00 +0000420#ifdef CONFIG_NR_DRAM_BANKS
421#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
422#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000423#define MEMORY_BANKS_MAX 4
Doug Anderson5e574542013-04-30 10:22:00 +0000424#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600425int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
426{
427 int err, nodeoffset;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900428 int len;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000429 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600430
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000431 if (banks > MEMORY_BANKS_MAX) {
432 printf("%s: num banks %d exceeds hardcoded limit %d."
433 " Recompile with higher MEMORY_BANKS_MAX?\n",
434 __FUNCTION__, banks, MEMORY_BANKS_MAX);
435 return -1;
436 }
437
Kumar Gala3c927282007-11-26 14:57:45 -0600438 err = fdt_check_header(blob);
439 if (err < 0) {
440 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
441 return err;
442 }
443
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900444 /* find or create "/memory" node. */
445 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
446 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800447 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900448
Kumar Gala3c927282007-11-26 14:57:45 -0600449 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
450 sizeof("memory"));
451 if (err < 0) {
452 printf("WARNING: could not set %s %s.\n", "device_type",
453 fdt_strerror(err));
454 return err;
455 }
456
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900457 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600458
459 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
460 if (err < 0) {
461 printf("WARNING: could not set %s %s.\n",
462 "reg", fdt_strerror(err));
463 return err;
464 }
465 return 0;
466}
467
John Rigbya6bd9e82010-10-13 13:57:33 -0600468int fdt_fixup_memory(void *blob, u64 start, u64 size)
469{
470 return fdt_fixup_memory_banks(blob, &start, &size, 1);
471}
472
Kumar Galaba37aa02008-08-19 15:41:18 -0500473void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600474{
Kumar Galaba37aa02008-08-19 15:41:18 -0500475 int node, i, j;
476 char enet[16], *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000477 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600478 const char *path;
Kumar Galaba37aa02008-08-19 15:41:18 -0500479 unsigned char mac_addr[6];
Kumar Galaab544632007-11-21 11:11:03 -0600480
481 node = fdt_path_offset(fdt, "/aliases");
Kumar Galaba37aa02008-08-19 15:41:18 -0500482 if (node < 0)
483 return;
484
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500485 if (!getenv("ethaddr")) {
486 if (getenv("usbethaddr")) {
487 strcpy(mac, "usbethaddr");
488 } else {
489 debug("No ethernet MAC Address defined\n");
490 return;
491 }
492 } else {
493 strcpy(mac, "ethaddr");
494 }
495
Kumar Galaba37aa02008-08-19 15:41:18 -0500496 i = 0;
497 while ((tmp = getenv(mac)) != NULL) {
498 sprintf(enet, "ethernet%d", i);
499 path = fdt_getprop(fdt, node, enet, NULL);
500 if (!path) {
501 debug("No alias for %s\n", enet);
502 sprintf(mac, "eth%daddr", ++i);
503 continue;
Kumar Galaab544632007-11-21 11:11:03 -0600504 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500505
506 for (j = 0; j < 6; j++) {
507 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
508 if (tmp)
509 tmp = (*end) ? end+1 : end;
Kumar Galaab544632007-11-21 11:11:03 -0600510 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500511
512 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
513 do_fixup_by_path(fdt, path, "local-mac-address",
514 &mac_addr, 6, 1);
515
516 sprintf(mac, "eth%daddr", ++i);
Kumar Galaab544632007-11-21 11:11:03 -0600517 }
518}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300519
Kumar Gala3082d232008-08-15 08:24:42 -0500520/* Resize the fdt to its actual size + a bit of padding */
Simon Glass5bf58cc2014-07-30 03:59:02 -0600521int fdt_shrink_to_minimum(void *blob)
Kumar Gala3082d232008-08-15 08:24:42 -0500522{
523 int i;
524 uint64_t addr, size;
525 int total, ret;
526 uint actualsize;
527
528 if (!blob)
529 return 0;
530
531 total = fdt_num_mem_rsv(blob);
532 for (i = 0; i < total; i++) {
533 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000534 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500535 fdt_del_mem_rsv(blob, i);
536 break;
537 }
538 }
539
Peter Korsgaardf242a082008-10-28 08:26:52 +0100540 /*
541 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200542 * plus the size needed for 5 fdt_add_mem_rsv, one
543 * for the fdt itself and 4 for a possible initrd
544 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100545 */
Kumar Gala3082d232008-08-15 08:24:42 -0500546 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200547 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500548
549 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000550 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
551 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500552
553 /* Change the fdt header to reflect the correct size */
554 fdt_set_totalsize(blob, actualsize);
555
556 /* Add the new reservation */
Simon Glass92549352011-09-17 06:48:58 +0000557 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500558 if (ret < 0)
559 return ret;
560
561 return actualsize;
562}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500563
564#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500565#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500566
567#define FDT_PCI_PREFETCH (0x40000000)
568#define FDT_PCI_MEM32 (0x02000000)
569#define FDT_PCI_IO (0x01000000)
570#define FDT_PCI_MEM64 (0x03000000)
571
572int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
573
574 int addrcell, sizecell, len, r;
575 u32 *dma_range;
576 /* sized based on pci addr cells, size-cells, & address-cells */
577 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
578
579 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
580 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
581
582 dma_range = &dma_ranges[0];
583 for (r = 0; r < hose->region_count; r++) {
584 u64 bus_start, phys_start, size;
585
Kumar Galaff4e66e2009-02-06 09:49:31 -0600586 /* skip if !PCI_REGION_SYS_MEMORY */
587 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500588 continue;
589
590 bus_start = (u64)hose->regions[r].bus_start;
591 phys_start = (u64)hose->regions[r].phys_start;
592 size = (u64)hose->regions[r].size;
593
594 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500595 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500596 dma_range[0] |= FDT_PCI_MEM64;
597 else
598 dma_range[0] |= FDT_PCI_MEM32;
599 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
600 dma_range[0] |= FDT_PCI_PREFETCH;
601#ifdef CONFIG_SYS_PCI_64BIT
602 dma_range[1] = bus_start >> 32;
603#else
604 dma_range[1] = 0;
605#endif
606 dma_range[2] = bus_start & 0xffffffff;
607
608 if (addrcell == 2) {
609 dma_range[3] = phys_start >> 32;
610 dma_range[4] = phys_start & 0xffffffff;
611 } else {
612 dma_range[3] = phys_start & 0xffffffff;
613 }
614
615 if (sizecell == 2) {
616 dma_range[3 + addrcell + 0] = size >> 32;
617 dma_range[3 + addrcell + 1] = size & 0xffffffff;
618 } else {
619 dma_range[3 + addrcell + 0] = size & 0xffffffff;
620 }
621
622 dma_range += (3 + addrcell + sizecell);
623 }
624
625 len = dma_range - &dma_ranges[0];
626 if (len)
627 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
628
629 return 0;
630}
631#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200632
633#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
634/*
Stefan Roese8a805df2010-09-16 14:01:53 +0200635 * Provide a weak default function to return the flash bank size.
636 * There might be multiple non-identical flash chips connected to one
637 * chip-select, so we need to pass an index as well.
638 */
639u32 __flash_get_bank_size(int cs, int idx)
640{
641 extern flash_info_t flash_info[];
642
643 /*
644 * As default, a simple 1:1 mapping is provided. Boards with
645 * a different mapping need to supply a board specific mapping
646 * routine.
647 */
648 return flash_info[cs].size;
649}
650u32 flash_get_bank_size(int cs, int idx)
651 __attribute__((weak, alias("__flash_get_bank_size")));
652
653/*
Stefan Roese30d45c02009-10-21 11:59:52 +0200654 * This function can be used to update the size in the "reg" property
Stefan Roese8a805df2010-09-16 14:01:53 +0200655 * of all NOR FLASH device nodes. This is necessary for boards with
Stefan Roese30d45c02009-10-21 11:59:52 +0200656 * non-fixed NOR FLASH sizes.
657 */
Stefan Roese8a805df2010-09-16 14:01:53 +0200658int fdt_fixup_nor_flash_size(void *blob)
Stefan Roese30d45c02009-10-21 11:59:52 +0200659{
660 char compat[][16] = { "cfi-flash", "jedec-flash" };
661 int off;
662 int len;
663 struct fdt_property *prop;
Stefan Roese2778a012010-09-24 13:51:50 +0200664 u32 *reg, *reg2;
Stefan Roese30d45c02009-10-21 11:59:52 +0200665 int i;
666
667 for (i = 0; i < 2; i++) {
668 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
669 while (off != -FDT_ERR_NOTFOUND) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200670 int idx;
671
Stefan Roese30d45c02009-10-21 11:59:52 +0200672 /*
Stefan Roese8a805df2010-09-16 14:01:53 +0200673 * Found one compatible node, so fixup the size
674 * int its reg properties
Stefan Roese30d45c02009-10-21 11:59:52 +0200675 */
676 prop = fdt_get_property_w(blob, off, "reg", &len);
677 if (prop) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200678 int tuple_size = 3 * sizeof(reg);
Stefan Roese30d45c02009-10-21 11:59:52 +0200679
Stefan Roese8a805df2010-09-16 14:01:53 +0200680 /*
681 * There might be multiple reg-tuples,
682 * so loop through them all
683 */
Stefan Roese2778a012010-09-24 13:51:50 +0200684 reg = reg2 = (u32 *)&prop->data[0];
685 for (idx = 0; idx < (len / tuple_size); idx++) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200686 /*
687 * Update size in reg property
688 */
689 reg[2] = flash_get_bank_size(reg[0],
690 idx);
Stefan Roese2778a012010-09-24 13:51:50 +0200691
692 /*
693 * Point to next reg tuple
694 */
695 reg += 3;
Stefan Roese30d45c02009-10-21 11:59:52 +0200696 }
Stefan Roese2778a012010-09-24 13:51:50 +0200697
698 fdt_setprop(blob, off, "reg", reg2, len);
Stefan Roese30d45c02009-10-21 11:59:52 +0200699 }
700
701 /* Move to next compatible node */
702 off = fdt_node_offset_by_compatible(blob, off,
703 compat[i]);
704 }
705 }
706
Stefan Roese8a805df2010-09-16 14:01:53 +0200707 return 0;
Stefan Roese30d45c02009-10-21 11:59:52 +0200708}
709#endif
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100710
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200711int fdt_increase_size(void *fdt, int add_len)
712{
713 int newlen;
714
715 newlen = fdt_totalsize(fdt) + add_len;
716
717 /* Open in place with a new len */
718 return fdt_open_into(fdt, fdt, newlen);
719}
720
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100721#ifdef CONFIG_FDT_FIXUP_PARTITIONS
722#include <jffs2/load_kernel.h>
723#include <mtd_node.h>
724
725struct reg_cell {
726 unsigned int r0;
727 unsigned int r1;
728};
729
730int fdt_del_subnodes(const void *blob, int parent_offset)
731{
732 int off, ndepth;
733 int ret;
734
735 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
736 (off >= 0) && (ndepth > 0);
737 off = fdt_next_node(blob, off, &ndepth)) {
738 if (ndepth == 1) {
739 debug("delete %s: offset: %x\n",
740 fdt_get_name(blob, off, 0), off);
741 ret = fdt_del_node((void *)blob, off);
742 if (ret < 0) {
743 printf("Can't delete node: %s\n",
744 fdt_strerror(ret));
745 return ret;
746 } else {
747 ndepth = 0;
748 off = parent_offset;
749 }
750 }
751 }
752 return 0;
753}
754
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100755int fdt_del_partitions(void *blob, int parent_offset)
756{
757 const void *prop;
758 int ndepth = 0;
759 int off;
760 int ret;
761
762 off = fdt_next_node(blob, parent_offset, &ndepth);
763 if (off > 0 && ndepth == 1) {
764 prop = fdt_getprop(blob, off, "label", NULL);
765 if (prop == NULL) {
766 /*
767 * Could not find label property, nand {}; node?
768 * Check subnode, delete partitions there if any.
769 */
770 return fdt_del_partitions(blob, off);
771 } else {
772 ret = fdt_del_subnodes(blob, parent_offset);
773 if (ret < 0) {
774 printf("Can't remove subnodes: %s\n",
775 fdt_strerror(ret));
776 return ret;
777 }
778 }
779 }
780 return 0;
781}
782
783int fdt_node_set_part_info(void *blob, int parent_offset,
784 struct mtd_device *dev)
785{
786 struct list_head *pentry;
787 struct part_info *part;
788 struct reg_cell cell;
789 int off, ndepth = 0;
790 int part_num, ret;
791 char buf[64];
792
793 ret = fdt_del_partitions(blob, parent_offset);
794 if (ret < 0)
795 return ret;
796
797 /*
798 * Check if it is nand {}; subnode, adjust
799 * the offset in this case
800 */
801 off = fdt_next_node(blob, parent_offset, &ndepth);
802 if (off > 0 && ndepth == 1)
803 parent_offset = off;
804
805 part_num = 0;
806 list_for_each_prev(pentry, &dev->parts) {
807 int newoff;
808
809 part = list_entry(pentry, struct part_info, link);
810
Scott Wood06503f12013-10-15 17:41:27 -0500811 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100812 part_num, part->name, part->size,
813 part->offset, part->mask_flags);
814
Scott Wood06503f12013-10-15 17:41:27 -0500815 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100816add_sub:
817 ret = fdt_add_subnode(blob, parent_offset, buf);
818 if (ret == -FDT_ERR_NOSPACE) {
819 ret = fdt_increase_size(blob, 512);
820 if (!ret)
821 goto add_sub;
822 else
823 goto err_size;
824 } else if (ret < 0) {
825 printf("Can't add partition node: %s\n",
826 fdt_strerror(ret));
827 return ret;
828 }
829 newoff = ret;
830
831 /* Check MTD_WRITEABLE_CMD flag */
832 if (part->mask_flags & 1) {
833add_ro:
834 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
835 if (ret == -FDT_ERR_NOSPACE) {
836 ret = fdt_increase_size(blob, 512);
837 if (!ret)
838 goto add_ro;
839 else
840 goto err_size;
841 } else if (ret < 0)
842 goto err_prop;
843 }
844
845 cell.r0 = cpu_to_fdt32(part->offset);
846 cell.r1 = cpu_to_fdt32(part->size);
847add_reg:
848 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
849 if (ret == -FDT_ERR_NOSPACE) {
850 ret = fdt_increase_size(blob, 512);
851 if (!ret)
852 goto add_reg;
853 else
854 goto err_size;
855 } else if (ret < 0)
856 goto err_prop;
857
858add_label:
859 ret = fdt_setprop_string(blob, newoff, "label", part->name);
860 if (ret == -FDT_ERR_NOSPACE) {
861 ret = fdt_increase_size(blob, 512);
862 if (!ret)
863 goto add_label;
864 else
865 goto err_size;
866 } else if (ret < 0)
867 goto err_prop;
868
869 part_num++;
870 }
871 return 0;
872err_size:
873 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
874 return ret;
875err_prop:
876 printf("Can't add property: %s\n", fdt_strerror(ret));
877 return ret;
878}
879
880/*
881 * Update partitions in nor/nand nodes using info from
882 * mtdparts environment variable. The nodes to update are
883 * specified by node_info structure which contains mtd device
884 * type and compatible string: E. g. the board code in
885 * ft_board_setup() could use:
886 *
887 * struct node_info nodes[] = {
888 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
889 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
890 * };
891 *
892 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
893 */
894void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
895{
896 struct node_info *ni = node_info;
897 struct mtd_device *dev;
898 char *parts;
899 int i, idx;
900 int noff;
901
902 parts = getenv("mtdparts");
903 if (!parts)
904 return;
905
906 if (mtdparts_init() != 0)
907 return;
908
909 for (i = 0; i < node_info_size; i++) {
910 idx = 0;
911 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
912 while (noff != -FDT_ERR_NOTFOUND) {
913 debug("%s: %s, mtd dev type %d\n",
914 fdt_get_name(blob, noff, 0),
915 ni[i].compat, ni[i].type);
916 dev = device_find(ni[i].type, idx++);
917 if (dev) {
918 if (fdt_node_set_part_info(blob, noff, dev))
919 return; /* return on error */
920 }
921
922 /* Jump to next flash node */
923 noff = fdt_node_offset_by_compatible(blob, noff,
924 ni[i].compat);
925 }
926 }
927}
928#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500929
930void fdt_del_node_and_alias(void *blob, const char *alias)
931{
932 int off = fdt_path_offset(blob, alias);
933
934 if (off < 0)
935 return;
936
937 fdt_del_node(blob, off);
938
939 off = fdt_path_offset(blob, "/aliases");
940 fdt_delprop(blob, off, alias);
941}
Kumar Galaa0342c02010-06-16 14:27:38 -0500942
Kumar Galaa0342c02010-06-16 14:27:38 -0500943/* Max address size we deal with */
944#define OF_MAX_ADDR_CELLS 4
945#define OF_BAD_ADDR ((u64)-1)
946#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
947 (ns) > 0)
948
949/* Debug utility */
950#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000951static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500952{
953 printf("%s", s);
954 while(na--)
955 printf(" %08x", *(addr++));
956 printf("\n");
957}
958#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000959static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500960#endif
961
962/* Callbacks for bus specific translators */
963struct of_bus {
964 const char *name;
965 const char *addresses;
Scott Wood6395f312010-08-12 18:37:39 -0500966 void (*count_cells)(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500967 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000968 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500969 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000970 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500971};
972
973/* Default translator (generic bus) */
Arnab Basuf43b4352014-09-08 12:19:59 -0700974void of_bus_default_count_cells(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500975 int *addrc, int *sizec)
976{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000977 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -0500978
Simon Glass933cdbb2014-10-23 18:58:57 -0600979 if (addrc)
980 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -0500981
982 if (sizec) {
983 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
984 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000985 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500986 else
987 *sizec = 1;
988 }
Kumar Galaa0342c02010-06-16 14:27:38 -0500989}
990
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000991static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500992 int na, int ns, int pna)
993{
994 u64 cp, s, da;
995
996 cp = of_read_number(range, na);
997 s = of_read_number(range + na + pna, ns);
998 da = of_read_number(addr, na);
999
Simon Glasse48f3742014-11-11 12:47:07 -07001000 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1001 ", da=%" PRIu64 "\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001002
1003 if (da < cp || da >= (cp + s))
1004 return OF_BAD_ADDR;
1005 return da - cp;
1006}
1007
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001008static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001009{
1010 u64 a = of_read_number(addr, na);
1011 memset(addr, 0, na * 4);
1012 a += offset;
1013 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001014 addr[na - 2] = cpu_to_fdt32(a >> 32);
1015 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001016
1017 return 0;
1018}
1019
1020/* Array of bus specific translators */
1021static struct of_bus of_busses[] = {
1022 /* Default */
1023 {
1024 .name = "default",
1025 .addresses = "reg",
1026 .count_cells = of_bus_default_count_cells,
1027 .map = of_bus_default_map,
1028 .translate = of_bus_default_translate,
1029 },
1030};
1031
1032static int of_translate_one(void * blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001033 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001034 int na, int ns, int pna, const char *rprop)
1035{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001036 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001037 int rlen;
1038 int rone;
1039 u64 offset = OF_BAD_ADDR;
1040
1041 /* Normally, an absence of a "ranges" property means we are
1042 * crossing a non-translatable boundary, and thus the addresses
1043 * below the current not cannot be converted to CPU physical ones.
1044 * Unfortunately, while this is very clear in the spec, it's not
1045 * what Apple understood, and they do have things like /uni-n or
1046 * /ht nodes with no "ranges" property and a lot of perfectly
1047 * useable mapped devices below them. Thus we treat the absence of
1048 * "ranges" as equivalent to an empty "ranges" property which means
1049 * a 1:1 translation at that level. It's up to the caller not to try
1050 * to translate addresses that aren't supposed to be translated in
1051 * the first place. --BenH.
1052 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001053 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001054 if (ranges == NULL || rlen == 0) {
1055 offset = of_read_number(addr, na);
1056 memset(addr, 0, pna * 4);
1057 debug("OF: no ranges, 1:1 translation\n");
1058 goto finish;
1059 }
1060
1061 debug("OF: walking ranges...\n");
1062
1063 /* Now walk through the ranges */
1064 rlen /= 4;
1065 rone = na + pna + ns;
1066 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1067 offset = bus->map(addr, ranges, na, ns, pna);
1068 if (offset != OF_BAD_ADDR)
1069 break;
1070 }
1071 if (offset == OF_BAD_ADDR) {
1072 debug("OF: not found !\n");
1073 return 1;
1074 }
1075 memcpy(addr, ranges + na, 4 * pna);
1076
1077 finish:
1078 of_dump_addr("OF: parent translation for:", addr, pna);
Simon Glasse48f3742014-11-11 12:47:07 -07001079 debug("OF: with offset: %" PRIu64 "\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001080
1081 /* Translate it into parent bus space */
1082 return pbus->translate(addr, offset, pna);
1083}
1084
1085/*
1086 * Translate an address from the device-tree into a CPU physical address,
1087 * this walks up the tree and applies the various bus mappings on the
1088 * way.
1089 *
1090 * Note: We consider that crossing any level with #size-cells == 0 to mean
1091 * that translation is impossible (that is we are not dealing with a value
1092 * that can be mapped to a cpu physical address). This is not really specified
1093 * that way, but this is traditionally the way IBM at least do things
1094 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001095static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1096 const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001097{
1098 int parent;
1099 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001100 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001101 int na, ns, pna, pns;
1102 u64 result = OF_BAD_ADDR;
1103
1104 debug("OF: ** translation for device %s **\n",
1105 fdt_get_name(blob, node_offset, NULL));
1106
1107 /* Get parent & match bus type */
1108 parent = fdt_parent_offset(blob, node_offset);
1109 if (parent < 0)
1110 goto bail;
1111 bus = &of_busses[0];
1112
1113 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001114 bus->count_cells(blob, parent, &na, &ns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001115 if (!OF_CHECK_COUNTS(na, ns)) {
1116 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1117 fdt_get_name(blob, node_offset, NULL));
1118 goto bail;
1119 }
1120 memcpy(addr, in_addr, na * 4);
1121
1122 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1123 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1124 of_dump_addr("OF: translating address:", addr, na);
1125
1126 /* Translate */
1127 for (;;) {
1128 /* Switch to parent bus */
1129 node_offset = parent;
1130 parent = fdt_parent_offset(blob, node_offset);
1131
1132 /* If root, we have finished */
1133 if (parent < 0) {
1134 debug("OF: reached root node\n");
1135 result = of_read_number(addr, na);
1136 break;
1137 }
1138
1139 /* Get new parent bus and counts */
1140 pbus = &of_busses[0];
Scott Wood6395f312010-08-12 18:37:39 -05001141 pbus->count_cells(blob, parent, &pna, &pns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001142 if (!OF_CHECK_COUNTS(pna, pns)) {
1143 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1144 fdt_get_name(blob, node_offset, NULL));
1145 break;
1146 }
1147
1148 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1149 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1150
1151 /* Apply bus translation */
1152 if (of_translate_one(blob, node_offset, bus, pbus,
1153 addr, na, ns, pna, rprop))
1154 break;
1155
1156 /* Complete the move up one level */
1157 na = pna;
1158 ns = pns;
1159 bus = pbus;
1160
1161 of_dump_addr("OF: one level translation:", addr, na);
1162 }
1163 bail:
1164
1165 return result;
1166}
1167
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001168u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001169{
1170 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1171}
Kumar Gala75e73af2010-07-04 12:48:21 -05001172
1173/**
1174 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1175 * who's reg property matches a physical cpu address
1176 *
1177 * @blob: ptr to device tree
1178 * @compat: compatiable string to match
1179 * @compat_off: property name
1180 *
1181 */
1182int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1183 phys_addr_t compat_off)
1184{
1185 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1186 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001187 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001188 if (reg) {
1189 if (compat_off == fdt_translate_address(blob, off, reg))
1190 return off;
1191 }
1192 off = fdt_node_offset_by_compatible(blob, off, compat);
1193 }
1194
1195 return -FDT_ERR_NOTFOUND;
1196}
1197
Kumar Galab4b847e2010-07-09 16:18:58 -05001198/**
1199 * fdt_alloc_phandle: Return next free phandle value
1200 *
1201 * @blob: ptr to device tree
1202 */
1203int fdt_alloc_phandle(void *blob)
1204{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001205 int offset;
1206 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001207
Kumar Galab4b847e2010-07-09 16:18:58 -05001208 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1209 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001210 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001211 }
1212
1213 return phandle + 1;
1214}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001215
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001216/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001217 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001218 *
1219 * @fdt: ptr to device tree
1220 * @nodeoffset: node to update
1221 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001222 */
1223int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001224{
1225 int ret;
1226
1227#ifdef DEBUG
1228 int off = fdt_node_offset_by_phandle(fdt, phandle);
1229
1230 if ((off >= 0) && (off != nodeoffset)) {
1231 char buf[64];
1232
1233 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1234 printf("Trying to update node %s with phandle %u ",
1235 buf, phandle);
1236
1237 fdt_get_path(fdt, off, buf, sizeof(buf));
1238 printf("that already exists in node %s.\n", buf);
1239 return -FDT_ERR_BADPHANDLE;
1240 }
1241#endif
1242
1243 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1244 if (ret < 0)
1245 return ret;
1246
1247 /*
1248 * For now, also set the deprecated "linux,phandle" property, so that we
1249 * don't break older kernels.
1250 */
1251 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1252
1253 return ret;
1254}
1255
Kumar Gala10aeabd2011-08-01 00:25:20 -05001256/*
1257 * fdt_create_phandle: Create a phandle property for the given node
1258 *
1259 * @fdt: ptr to device tree
1260 * @nodeoffset: node to update
1261 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001262unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001263{
1264 /* see if there is a phandle already */
1265 int phandle = fdt_get_phandle(fdt, nodeoffset);
1266
1267 /* if we got 0, means no phandle so create one */
1268 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001269 int ret;
1270
Kumar Gala10aeabd2011-08-01 00:25:20 -05001271 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001272 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1273 if (ret < 0) {
1274 printf("Can't set phandle %u: %s\n", phandle,
1275 fdt_strerror(ret));
1276 return 0;
1277 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001278 }
1279
1280 return phandle;
1281}
1282
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001283/*
1284 * fdt_set_node_status: Set status for the given node
1285 *
1286 * @fdt: ptr to device tree
1287 * @nodeoffset: node to update
1288 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1289 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1290 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1291 */
1292int fdt_set_node_status(void *fdt, int nodeoffset,
1293 enum fdt_status status, unsigned int error_code)
1294{
1295 char buf[16];
1296 int ret = 0;
1297
1298 if (nodeoffset < 0)
1299 return nodeoffset;
1300
1301 switch (status) {
1302 case FDT_STATUS_OKAY:
1303 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1304 break;
1305 case FDT_STATUS_DISABLED:
1306 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1307 break;
1308 case FDT_STATUS_FAIL:
1309 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1310 break;
1311 case FDT_STATUS_FAIL_ERROR_CODE:
1312 sprintf(buf, "fail-%d", error_code);
1313 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1314 break;
1315 default:
1316 printf("Invalid fdt status: %x\n", status);
1317 ret = -1;
1318 break;
1319 }
1320
1321 return ret;
1322}
1323
1324/*
1325 * fdt_set_status_by_alias: Set status for the given node given an alias
1326 *
1327 * @fdt: ptr to device tree
1328 * @alias: alias of node to update
1329 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1330 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1331 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1332 */
1333int fdt_set_status_by_alias(void *fdt, const char* alias,
1334 enum fdt_status status, unsigned int error_code)
1335{
1336 int offset = fdt_path_offset(fdt, alias);
1337
1338 return fdt_set_node_status(fdt, offset, status, error_code);
1339}
1340
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001341#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001342int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1343{
1344 int noff;
1345 int ret;
1346
1347 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1348 if (noff != -FDT_ERR_NOTFOUND) {
1349 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1350add_edid:
1351 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1352 if (ret == -FDT_ERR_NOSPACE) {
1353 ret = fdt_increase_size(blob, 512);
1354 if (!ret)
1355 goto add_edid;
1356 else
1357 goto err_size;
1358 } else if (ret < 0) {
1359 printf("Can't add property: %s\n", fdt_strerror(ret));
1360 return ret;
1361 }
1362 }
1363 return 0;
1364err_size:
1365 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1366 return ret;
1367}
1368#endif
Timur Tabibb682002011-05-03 13:24:07 -05001369
1370/*
1371 * Verify the physical address of device tree node for a given alias
1372 *
1373 * This function locates the device tree node of a given alias, and then
1374 * verifies that the physical address of that device matches the given
1375 * parameter. It displays a message if there is a mismatch.
1376 *
1377 * Returns 1 on success, 0 on failure
1378 */
1379int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1380{
1381 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001382 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001383 int node, len;
1384 u64 dt_addr;
1385
1386 path = fdt_getprop(fdt, anode, alias, NULL);
1387 if (!path) {
1388 /* If there's no such alias, then it's not a failure */
1389 return 1;
1390 }
1391
1392 node = fdt_path_offset(fdt, path);
1393 if (node < 0) {
1394 printf("Warning: device tree alias '%s' points to invalid "
1395 "node %s.\n", alias, path);
1396 return 0;
1397 }
1398
1399 reg = fdt_getprop(fdt, node, "reg", &len);
1400 if (!reg) {
1401 printf("Warning: device tree node '%s' has no address.\n",
1402 path);
1403 return 0;
1404 }
1405
1406 dt_addr = fdt_translate_address(fdt, node, reg);
1407 if (addr != dt_addr) {
Simon Glasse48f3742014-11-11 12:47:07 -07001408 printf("Warning: U-Boot configured device %s at address %"
1409 PRIx64 ",\n but the device tree has it address %"
1410 PRIx64 ".\n", alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001411 return 0;
1412 }
1413
1414 return 1;
1415}
1416
1417/*
1418 * Returns the base address of an SOC or PCI node
1419 */
1420u64 fdt_get_base_address(void *fdt, int node)
1421{
1422 int size;
1423 u32 naddr;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001424 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001425
Simon Glass933cdbb2014-10-23 18:58:57 -06001426 naddr = fdt_address_cells(fdt, node);
Timur Tabibb682002011-05-03 13:24:07 -05001427
1428 prop = fdt_getprop(fdt, node, "ranges", &size);
1429
1430 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1431}
Alexander Grafc48e6862014-04-11 17:09:41 +02001432
1433/*
1434 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1435 */
1436static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1437 uint64_t *val, int cells)
1438{
1439 const fdt32_t *prop32 = &prop[cell_off];
1440 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1441
1442 if ((cell_off + cells) > prop_len)
1443 return -FDT_ERR_NOSPACE;
1444
1445 switch (cells) {
1446 case 1:
1447 *val = fdt32_to_cpu(*prop32);
1448 break;
1449 case 2:
1450 *val = fdt64_to_cpu(*prop64);
1451 break;
1452 default:
1453 return -FDT_ERR_NOSPACE;
1454 }
1455
1456 return 0;
1457}
1458
1459/**
1460 * fdt_read_range - Read a node's n'th range property
1461 *
1462 * @fdt: ptr to device tree
1463 * @node: offset of node
1464 * @n: range index
1465 * @child_addr: pointer to storage for the "child address" field
1466 * @addr: pointer to storage for the CPU view translated physical start
1467 * @len: pointer to storage for the range length
1468 *
1469 * Convenience function that reads and interprets a specific range out of
1470 * a number of the "ranges" property array.
1471 */
1472int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1473 uint64_t *addr, uint64_t *len)
1474{
1475 int pnode = fdt_parent_offset(fdt, node);
1476 const fdt32_t *ranges;
1477 int pacells;
1478 int acells;
1479 int scells;
1480 int ranges_len;
1481 int cell = 0;
1482 int r = 0;
1483
1484 /*
1485 * The "ranges" property is an array of
1486 * { <child address> <parent address> <size in child address space> }
1487 *
1488 * All 3 elements can span a diffent number of cells. Fetch their size.
1489 */
1490 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1491 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1492 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1493
1494 /* Now try to get the ranges property */
1495 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1496 if (!ranges)
1497 return -FDT_ERR_NOTFOUND;
1498 ranges_len /= sizeof(uint32_t);
1499
1500 /* Jump to the n'th entry */
1501 cell = n * (pacells + acells + scells);
1502
1503 /* Read <child address> */
1504 if (child_addr) {
1505 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1506 acells);
1507 if (r)
1508 return r;
1509 }
1510 cell += acells;
1511
1512 /* Read <parent address> */
1513 if (addr)
1514 *addr = fdt_translate_address(fdt, node, ranges + cell);
1515 cell += pacells;
1516
1517 /* Read <size in child address space> */
1518 if (len) {
1519 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1520 if (r)
1521 return r;
1522 }
1523
1524 return 0;
1525}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001526
1527/**
1528 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1529 *
1530 * @fdt: ptr to device tree
1531 * @node: offset of the simplefb node
1532 * @base_address: framebuffer base address
1533 * @width: width in pixels
1534 * @height: height in pixels
1535 * @stride: bytes per line
1536 * @format: pixel format string
1537 *
1538 * Convenience function to fill and enable a simplefb node.
1539 */
1540int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1541 u32 height, u32 stride, const char *format)
1542{
1543 char name[32];
1544 fdt32_t cells[4];
1545 int i, addrc, sizec, ret;
1546
1547 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1548 &addrc, &sizec);
1549 i = 0;
1550 if (addrc == 2)
1551 cells[i++] = cpu_to_fdt32(base_address >> 32);
1552 cells[i++] = cpu_to_fdt32(base_address);
1553 if (sizec == 2)
1554 cells[i++] = 0;
1555 cells[i++] = cpu_to_fdt32(height * stride);
1556
1557 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1558 if (ret < 0)
1559 return ret;
1560
Simon Glassc3ec6462015-04-20 12:37:16 -06001561 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001562 ret = fdt_set_name(fdt, node, name);
1563 if (ret < 0)
1564 return ret;
1565
1566 ret = fdt_setprop_u32(fdt, node, "width", width);
1567 if (ret < 0)
1568 return ret;
1569
1570 ret = fdt_setprop_u32(fdt, node, "height", height);
1571 if (ret < 0)
1572 return ret;
1573
1574 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1575 if (ret < 0)
1576 return ret;
1577
1578 ret = fdt_setprop_string(fdt, node, "format", format);
1579 if (ret < 0)
1580 return ret;
1581
1582 ret = fdt_setprop_string(fdt, node, "status", "okay");
1583 if (ret < 0)
1584 return ret;
1585
1586 return 0;
1587}
Tim Harvey08daa252015-04-08 11:45:39 -07001588
1589/*
1590 * Update native-mode in display-timings from display environment variable.
1591 * The node to update are specified by path.
1592 */
1593int fdt_fixup_display(void *blob, const char *path, const char *display)
1594{
1595 int off, toff;
1596
1597 if (!display || !path)
1598 return -FDT_ERR_NOTFOUND;
1599
1600 toff = fdt_path_offset(blob, path);
1601 if (toff >= 0)
1602 toff = fdt_subnode_offset(blob, toff, "display-timings");
1603 if (toff < 0)
1604 return toff;
1605
1606 for (off = fdt_first_subnode(blob, toff);
1607 off >= 0;
1608 off = fdt_next_subnode(blob, off)) {
1609 uint32_t h = fdt_get_phandle(blob, off);
1610 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1611 fdt32_to_cpu(h));
1612 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1613 return fdt_setprop_u32(blob, toff, "native-mode", h);
1614 }
1615 return toff;
1616}