blob: 9e501484625d8583cd1d122e8e6c83f9c6948ac5 [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
197
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900198int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500199{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900200 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500201 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900202 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500203 uint64_t addr, size;
204
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900205 /* just return if the size of initrd is zero */
206 if (initrd_start == initrd_end)
207 return 0;
208
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900209 /* find or create "/chosen" node. */
210 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
211 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500212 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500213
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500214 total = fdt_num_mem_rsv(fdt);
215
216 /*
217 * Look for an existing entry and update it. If we don't find
218 * the entry, we will j be the next available slot.
219 */
220 for (j = 0; j < total; j++) {
221 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
222 if (addr == initrd_start) {
223 fdt_del_mem_rsv(fdt, j);
224 break;
225 }
226 }
227
Grant Likelyce6b27a2011-03-28 09:58:55 +0000228 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500229 if (err < 0) {
230 printf("fdt_initrd: %s\n", fdt_strerror(err));
231 return err;
232 }
233
Simon Glass933cdbb2014-10-23 18:58:57 -0600234 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800235
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900236 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
237 (uint64_t)initrd_start, is_u64);
238
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900239 if (err < 0) {
240 printf("WARNING: could not set linux,initrd-start %s.\n",
241 fdt_strerror(err));
242 return err;
243 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900244
245 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
246 (uint64_t)initrd_end, is_u64);
247
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900248 if (err < 0) {
249 printf("WARNING: could not set linux,initrd-end %s.\n",
250 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500251
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900252 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500253 }
254
255 return 0;
256}
257
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900258int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400259{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400260 int nodeoffset;
261 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400262 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400263
264 err = fdt_check_header(fdt);
265 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400266 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400267 return err;
268 }
269
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900270 /* find or create "/chosen" node. */
271 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
272 if (nodeoffset < 0)
273 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400274
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400275 str = getenv("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900276 if (str) {
277 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
278 strlen(str) + 1);
279 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900280 printf("WARNING: could not set bootargs %s.\n",
281 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900282 return err;
283 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400284 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500285
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900286 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400287}
288
Kumar Galae93becf2007-11-03 19:46:28 -0500289void do_fixup_by_path(void *fdt, const char *path, const char *prop,
290 const void *val, int len, int create)
291{
292#if defined(DEBUG)
293 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600294 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500295 for (i = 0; i < len; i++)
296 debug(" %.2x", *(u8*)(val+i));
297 debug("\n");
298#endif
299 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
300 if (rc)
301 printf("Unable to update property %s:%s, err=%s\n",
302 path, prop, fdt_strerror(rc));
303}
304
305void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
306 u32 val, int create)
307{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000308 fdt32_t tmp = cpu_to_fdt32(val);
309 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500310}
311
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600312void do_fixup_by_prop(void *fdt,
313 const char *pname, const void *pval, int plen,
314 const char *prop, const void *val, int len,
315 int create)
316{
317 int off;
318#if defined(DEBUG)
319 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600320 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600321 for (i = 0; i < len; i++)
322 debug(" %.2x", *(u8*)(val+i));
323 debug("\n");
324#endif
325 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
326 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000327 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600328 fdt_setprop(fdt, off, prop, val, len);
329 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
330 }
331}
332
333void do_fixup_by_prop_u32(void *fdt,
334 const char *pname, const void *pval, int plen,
335 const char *prop, u32 val, int create)
336{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000337 fdt32_t tmp = cpu_to_fdt32(val);
338 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600339}
340
341void do_fixup_by_compat(void *fdt, const char *compat,
342 const char *prop, const void *val, int len, int create)
343{
344 int off = -1;
345#if defined(DEBUG)
346 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600347 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600348 for (i = 0; i < len; i++)
349 debug(" %.2x", *(u8*)(val+i));
350 debug("\n");
351#endif
352 off = fdt_node_offset_by_compatible(fdt, -1, compat);
353 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000354 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600355 fdt_setprop(fdt, off, prop, val, len);
356 off = fdt_node_offset_by_compatible(fdt, off, compat);
357 }
358}
359
360void do_fixup_by_compat_u32(void *fdt, const char *compat,
361 const char *prop, u32 val, int create)
362{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000363 fdt32_t tmp = cpu_to_fdt32(val);
364 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600365}
366
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900367/*
368 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
369 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600370static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
371 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900372{
373 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100374 int address_cells = fdt_address_cells(fdt, 0);
375 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900376 char *p = buf;
377
378 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100379 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900380 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
381 else
382 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100383 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900384
Hans de Goedeffccb842014-11-28 14:23:51 +0100385 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900386 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
387 else
388 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100389 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900390 }
391
392 return p - (char *)buf;
393}
394
Doug Anderson5e574542013-04-30 10:22:00 +0000395#ifdef CONFIG_NR_DRAM_BANKS
396#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
397#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000398#define MEMORY_BANKS_MAX 4
Doug Anderson5e574542013-04-30 10:22:00 +0000399#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600400int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
401{
402 int err, nodeoffset;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900403 int len;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000404 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600405
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000406 if (banks > MEMORY_BANKS_MAX) {
407 printf("%s: num banks %d exceeds hardcoded limit %d."
408 " Recompile with higher MEMORY_BANKS_MAX?\n",
409 __FUNCTION__, banks, MEMORY_BANKS_MAX);
410 return -1;
411 }
412
Kumar Gala3c927282007-11-26 14:57:45 -0600413 err = fdt_check_header(blob);
414 if (err < 0) {
415 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
416 return err;
417 }
418
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900419 /* find or create "/memory" node. */
420 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
421 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800422 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900423
Kumar Gala3c927282007-11-26 14:57:45 -0600424 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
425 sizeof("memory"));
426 if (err < 0) {
427 printf("WARNING: could not set %s %s.\n", "device_type",
428 fdt_strerror(err));
429 return err;
430 }
431
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900432 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600433
434 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
435 if (err < 0) {
436 printf("WARNING: could not set %s %s.\n",
437 "reg", fdt_strerror(err));
438 return err;
439 }
440 return 0;
441}
442
John Rigbya6bd9e82010-10-13 13:57:33 -0600443int fdt_fixup_memory(void *blob, u64 start, u64 size)
444{
445 return fdt_fixup_memory_banks(blob, &start, &size, 1);
446}
447
Kumar Galaba37aa02008-08-19 15:41:18 -0500448void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600449{
Kumar Galaba37aa02008-08-19 15:41:18 -0500450 int node, i, j;
451 char enet[16], *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000452 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600453 const char *path;
Kumar Galaba37aa02008-08-19 15:41:18 -0500454 unsigned char mac_addr[6];
Kumar Galaab544632007-11-21 11:11:03 -0600455
456 node = fdt_path_offset(fdt, "/aliases");
Kumar Galaba37aa02008-08-19 15:41:18 -0500457 if (node < 0)
458 return;
459
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500460 if (!getenv("ethaddr")) {
461 if (getenv("usbethaddr")) {
462 strcpy(mac, "usbethaddr");
463 } else {
464 debug("No ethernet MAC Address defined\n");
465 return;
466 }
467 } else {
468 strcpy(mac, "ethaddr");
469 }
470
Kumar Galaba37aa02008-08-19 15:41:18 -0500471 i = 0;
472 while ((tmp = getenv(mac)) != NULL) {
473 sprintf(enet, "ethernet%d", i);
474 path = fdt_getprop(fdt, node, enet, NULL);
475 if (!path) {
476 debug("No alias for %s\n", enet);
477 sprintf(mac, "eth%daddr", ++i);
478 continue;
Kumar Galaab544632007-11-21 11:11:03 -0600479 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500480
481 for (j = 0; j < 6; j++) {
482 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
483 if (tmp)
484 tmp = (*end) ? end+1 : end;
Kumar Galaab544632007-11-21 11:11:03 -0600485 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500486
487 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
488 do_fixup_by_path(fdt, path, "local-mac-address",
489 &mac_addr, 6, 1);
490
491 sprintf(mac, "eth%daddr", ++i);
Kumar Galaab544632007-11-21 11:11:03 -0600492 }
493}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300494
Kumar Gala3082d232008-08-15 08:24:42 -0500495/* Resize the fdt to its actual size + a bit of padding */
Simon Glass5bf58cc2014-07-30 03:59:02 -0600496int fdt_shrink_to_minimum(void *blob)
Kumar Gala3082d232008-08-15 08:24:42 -0500497{
498 int i;
499 uint64_t addr, size;
500 int total, ret;
501 uint actualsize;
502
503 if (!blob)
504 return 0;
505
506 total = fdt_num_mem_rsv(blob);
507 for (i = 0; i < total; i++) {
508 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000509 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500510 fdt_del_mem_rsv(blob, i);
511 break;
512 }
513 }
514
Peter Korsgaardf242a082008-10-28 08:26:52 +0100515 /*
516 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200517 * plus the size needed for 5 fdt_add_mem_rsv, one
518 * for the fdt itself and 4 for a possible initrd
519 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100520 */
Kumar Gala3082d232008-08-15 08:24:42 -0500521 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200522 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500523
524 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000525 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
526 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500527
528 /* Change the fdt header to reflect the correct size */
529 fdt_set_totalsize(blob, actualsize);
530
531 /* Add the new reservation */
Simon Glass92549352011-09-17 06:48:58 +0000532 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500533 if (ret < 0)
534 return ret;
535
536 return actualsize;
537}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500538
539#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500540#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500541
542#define FDT_PCI_PREFETCH (0x40000000)
543#define FDT_PCI_MEM32 (0x02000000)
544#define FDT_PCI_IO (0x01000000)
545#define FDT_PCI_MEM64 (0x03000000)
546
547int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
548
549 int addrcell, sizecell, len, r;
550 u32 *dma_range;
551 /* sized based on pci addr cells, size-cells, & address-cells */
552 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
553
554 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
555 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
556
557 dma_range = &dma_ranges[0];
558 for (r = 0; r < hose->region_count; r++) {
559 u64 bus_start, phys_start, size;
560
Kumar Galaff4e66e2009-02-06 09:49:31 -0600561 /* skip if !PCI_REGION_SYS_MEMORY */
562 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500563 continue;
564
565 bus_start = (u64)hose->regions[r].bus_start;
566 phys_start = (u64)hose->regions[r].phys_start;
567 size = (u64)hose->regions[r].size;
568
569 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500570 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500571 dma_range[0] |= FDT_PCI_MEM64;
572 else
573 dma_range[0] |= FDT_PCI_MEM32;
574 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
575 dma_range[0] |= FDT_PCI_PREFETCH;
576#ifdef CONFIG_SYS_PCI_64BIT
577 dma_range[1] = bus_start >> 32;
578#else
579 dma_range[1] = 0;
580#endif
581 dma_range[2] = bus_start & 0xffffffff;
582
583 if (addrcell == 2) {
584 dma_range[3] = phys_start >> 32;
585 dma_range[4] = phys_start & 0xffffffff;
586 } else {
587 dma_range[3] = phys_start & 0xffffffff;
588 }
589
590 if (sizecell == 2) {
591 dma_range[3 + addrcell + 0] = size >> 32;
592 dma_range[3 + addrcell + 1] = size & 0xffffffff;
593 } else {
594 dma_range[3 + addrcell + 0] = size & 0xffffffff;
595 }
596
597 dma_range += (3 + addrcell + sizecell);
598 }
599
600 len = dma_range - &dma_ranges[0];
601 if (len)
602 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
603
604 return 0;
605}
606#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200607
608#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
609/*
Stefan Roese8a805df2010-09-16 14:01:53 +0200610 * Provide a weak default function to return the flash bank size.
611 * There might be multiple non-identical flash chips connected to one
612 * chip-select, so we need to pass an index as well.
613 */
614u32 __flash_get_bank_size(int cs, int idx)
615{
616 extern flash_info_t flash_info[];
617
618 /*
619 * As default, a simple 1:1 mapping is provided. Boards with
620 * a different mapping need to supply a board specific mapping
621 * routine.
622 */
623 return flash_info[cs].size;
624}
625u32 flash_get_bank_size(int cs, int idx)
626 __attribute__((weak, alias("__flash_get_bank_size")));
627
628/*
Stefan Roese30d45c02009-10-21 11:59:52 +0200629 * This function can be used to update the size in the "reg" property
Stefan Roese8a805df2010-09-16 14:01:53 +0200630 * of all NOR FLASH device nodes. This is necessary for boards with
Stefan Roese30d45c02009-10-21 11:59:52 +0200631 * non-fixed NOR FLASH sizes.
632 */
Stefan Roese8a805df2010-09-16 14:01:53 +0200633int fdt_fixup_nor_flash_size(void *blob)
Stefan Roese30d45c02009-10-21 11:59:52 +0200634{
635 char compat[][16] = { "cfi-flash", "jedec-flash" };
636 int off;
637 int len;
638 struct fdt_property *prop;
Stefan Roese2778a012010-09-24 13:51:50 +0200639 u32 *reg, *reg2;
Stefan Roese30d45c02009-10-21 11:59:52 +0200640 int i;
641
642 for (i = 0; i < 2; i++) {
643 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
644 while (off != -FDT_ERR_NOTFOUND) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200645 int idx;
646
Stefan Roese30d45c02009-10-21 11:59:52 +0200647 /*
Stefan Roese8a805df2010-09-16 14:01:53 +0200648 * Found one compatible node, so fixup the size
649 * int its reg properties
Stefan Roese30d45c02009-10-21 11:59:52 +0200650 */
651 prop = fdt_get_property_w(blob, off, "reg", &len);
652 if (prop) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200653 int tuple_size = 3 * sizeof(reg);
Stefan Roese30d45c02009-10-21 11:59:52 +0200654
Stefan Roese8a805df2010-09-16 14:01:53 +0200655 /*
656 * There might be multiple reg-tuples,
657 * so loop through them all
658 */
Stefan Roese2778a012010-09-24 13:51:50 +0200659 reg = reg2 = (u32 *)&prop->data[0];
660 for (idx = 0; idx < (len / tuple_size); idx++) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200661 /*
662 * Update size in reg property
663 */
664 reg[2] = flash_get_bank_size(reg[0],
665 idx);
Stefan Roese2778a012010-09-24 13:51:50 +0200666
667 /*
668 * Point to next reg tuple
669 */
670 reg += 3;
Stefan Roese30d45c02009-10-21 11:59:52 +0200671 }
Stefan Roese2778a012010-09-24 13:51:50 +0200672
673 fdt_setprop(blob, off, "reg", reg2, len);
Stefan Roese30d45c02009-10-21 11:59:52 +0200674 }
675
676 /* Move to next compatible node */
677 off = fdt_node_offset_by_compatible(blob, off,
678 compat[i]);
679 }
680 }
681
Stefan Roese8a805df2010-09-16 14:01:53 +0200682 return 0;
Stefan Roese30d45c02009-10-21 11:59:52 +0200683}
684#endif
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100685
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200686int fdt_increase_size(void *fdt, int add_len)
687{
688 int newlen;
689
690 newlen = fdt_totalsize(fdt) + add_len;
691
692 /* Open in place with a new len */
693 return fdt_open_into(fdt, fdt, newlen);
694}
695
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100696#ifdef CONFIG_FDT_FIXUP_PARTITIONS
697#include <jffs2/load_kernel.h>
698#include <mtd_node.h>
699
700struct reg_cell {
701 unsigned int r0;
702 unsigned int r1;
703};
704
705int fdt_del_subnodes(const void *blob, int parent_offset)
706{
707 int off, ndepth;
708 int ret;
709
710 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
711 (off >= 0) && (ndepth > 0);
712 off = fdt_next_node(blob, off, &ndepth)) {
713 if (ndepth == 1) {
714 debug("delete %s: offset: %x\n",
715 fdt_get_name(blob, off, 0), off);
716 ret = fdt_del_node((void *)blob, off);
717 if (ret < 0) {
718 printf("Can't delete node: %s\n",
719 fdt_strerror(ret));
720 return ret;
721 } else {
722 ndepth = 0;
723 off = parent_offset;
724 }
725 }
726 }
727 return 0;
728}
729
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100730int fdt_del_partitions(void *blob, int parent_offset)
731{
732 const void *prop;
733 int ndepth = 0;
734 int off;
735 int ret;
736
737 off = fdt_next_node(blob, parent_offset, &ndepth);
738 if (off > 0 && ndepth == 1) {
739 prop = fdt_getprop(blob, off, "label", NULL);
740 if (prop == NULL) {
741 /*
742 * Could not find label property, nand {}; node?
743 * Check subnode, delete partitions there if any.
744 */
745 return fdt_del_partitions(blob, off);
746 } else {
747 ret = fdt_del_subnodes(blob, parent_offset);
748 if (ret < 0) {
749 printf("Can't remove subnodes: %s\n",
750 fdt_strerror(ret));
751 return ret;
752 }
753 }
754 }
755 return 0;
756}
757
758int fdt_node_set_part_info(void *blob, int parent_offset,
759 struct mtd_device *dev)
760{
761 struct list_head *pentry;
762 struct part_info *part;
763 struct reg_cell cell;
764 int off, ndepth = 0;
765 int part_num, ret;
766 char buf[64];
767
768 ret = fdt_del_partitions(blob, parent_offset);
769 if (ret < 0)
770 return ret;
771
772 /*
773 * Check if it is nand {}; subnode, adjust
774 * the offset in this case
775 */
776 off = fdt_next_node(blob, parent_offset, &ndepth);
777 if (off > 0 && ndepth == 1)
778 parent_offset = off;
779
780 part_num = 0;
781 list_for_each_prev(pentry, &dev->parts) {
782 int newoff;
783
784 part = list_entry(pentry, struct part_info, link);
785
Scott Wood06503f12013-10-15 17:41:27 -0500786 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100787 part_num, part->name, part->size,
788 part->offset, part->mask_flags);
789
Scott Wood06503f12013-10-15 17:41:27 -0500790 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100791add_sub:
792 ret = fdt_add_subnode(blob, parent_offset, buf);
793 if (ret == -FDT_ERR_NOSPACE) {
794 ret = fdt_increase_size(blob, 512);
795 if (!ret)
796 goto add_sub;
797 else
798 goto err_size;
799 } else if (ret < 0) {
800 printf("Can't add partition node: %s\n",
801 fdt_strerror(ret));
802 return ret;
803 }
804 newoff = ret;
805
806 /* Check MTD_WRITEABLE_CMD flag */
807 if (part->mask_flags & 1) {
808add_ro:
809 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
810 if (ret == -FDT_ERR_NOSPACE) {
811 ret = fdt_increase_size(blob, 512);
812 if (!ret)
813 goto add_ro;
814 else
815 goto err_size;
816 } else if (ret < 0)
817 goto err_prop;
818 }
819
820 cell.r0 = cpu_to_fdt32(part->offset);
821 cell.r1 = cpu_to_fdt32(part->size);
822add_reg:
823 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
824 if (ret == -FDT_ERR_NOSPACE) {
825 ret = fdt_increase_size(blob, 512);
826 if (!ret)
827 goto add_reg;
828 else
829 goto err_size;
830 } else if (ret < 0)
831 goto err_prop;
832
833add_label:
834 ret = fdt_setprop_string(blob, newoff, "label", part->name);
835 if (ret == -FDT_ERR_NOSPACE) {
836 ret = fdt_increase_size(blob, 512);
837 if (!ret)
838 goto add_label;
839 else
840 goto err_size;
841 } else if (ret < 0)
842 goto err_prop;
843
844 part_num++;
845 }
846 return 0;
847err_size:
848 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
849 return ret;
850err_prop:
851 printf("Can't add property: %s\n", fdt_strerror(ret));
852 return ret;
853}
854
855/*
856 * Update partitions in nor/nand nodes using info from
857 * mtdparts environment variable. The nodes to update are
858 * specified by node_info structure which contains mtd device
859 * type and compatible string: E. g. the board code in
860 * ft_board_setup() could use:
861 *
862 * struct node_info nodes[] = {
863 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
864 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
865 * };
866 *
867 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
868 */
869void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
870{
871 struct node_info *ni = node_info;
872 struct mtd_device *dev;
873 char *parts;
874 int i, idx;
875 int noff;
876
877 parts = getenv("mtdparts");
878 if (!parts)
879 return;
880
881 if (mtdparts_init() != 0)
882 return;
883
884 for (i = 0; i < node_info_size; i++) {
885 idx = 0;
886 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
887 while (noff != -FDT_ERR_NOTFOUND) {
888 debug("%s: %s, mtd dev type %d\n",
889 fdt_get_name(blob, noff, 0),
890 ni[i].compat, ni[i].type);
891 dev = device_find(ni[i].type, idx++);
892 if (dev) {
893 if (fdt_node_set_part_info(blob, noff, dev))
894 return; /* return on error */
895 }
896
897 /* Jump to next flash node */
898 noff = fdt_node_offset_by_compatible(blob, noff,
899 ni[i].compat);
900 }
901 }
902}
903#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500904
905void fdt_del_node_and_alias(void *blob, const char *alias)
906{
907 int off = fdt_path_offset(blob, alias);
908
909 if (off < 0)
910 return;
911
912 fdt_del_node(blob, off);
913
914 off = fdt_path_offset(blob, "/aliases");
915 fdt_delprop(blob, off, alias);
916}
Kumar Galaa0342c02010-06-16 14:27:38 -0500917
Kumar Galaa0342c02010-06-16 14:27:38 -0500918/* Max address size we deal with */
919#define OF_MAX_ADDR_CELLS 4
920#define OF_BAD_ADDR ((u64)-1)
921#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
922 (ns) > 0)
923
924/* Debug utility */
925#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000926static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500927{
928 printf("%s", s);
929 while(na--)
930 printf(" %08x", *(addr++));
931 printf("\n");
932}
933#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000934static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500935#endif
936
937/* Callbacks for bus specific translators */
938struct of_bus {
939 const char *name;
940 const char *addresses;
Scott Wood6395f312010-08-12 18:37:39 -0500941 void (*count_cells)(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500942 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000943 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500944 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000945 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500946};
947
948/* Default translator (generic bus) */
Arnab Basuf43b4352014-09-08 12:19:59 -0700949void of_bus_default_count_cells(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500950 int *addrc, int *sizec)
951{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000952 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -0500953
Simon Glass933cdbb2014-10-23 18:58:57 -0600954 if (addrc)
955 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -0500956
957 if (sizec) {
958 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
959 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000960 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500961 else
962 *sizec = 1;
963 }
Kumar Galaa0342c02010-06-16 14:27:38 -0500964}
965
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000966static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500967 int na, int ns, int pna)
968{
969 u64 cp, s, da;
970
971 cp = of_read_number(range, na);
972 s = of_read_number(range + na + pna, ns);
973 da = of_read_number(addr, na);
974
Simon Glasse48f3742014-11-11 12:47:07 -0700975 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
976 ", da=%" PRIu64 "\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -0500977
978 if (da < cp || da >= (cp + s))
979 return OF_BAD_ADDR;
980 return da - cp;
981}
982
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000983static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500984{
985 u64 a = of_read_number(addr, na);
986 memset(addr, 0, na * 4);
987 a += offset;
988 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000989 addr[na - 2] = cpu_to_fdt32(a >> 32);
990 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -0500991
992 return 0;
993}
994
995/* Array of bus specific translators */
996static struct of_bus of_busses[] = {
997 /* Default */
998 {
999 .name = "default",
1000 .addresses = "reg",
1001 .count_cells = of_bus_default_count_cells,
1002 .map = of_bus_default_map,
1003 .translate = of_bus_default_translate,
1004 },
1005};
1006
1007static int of_translate_one(void * blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001008 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001009 int na, int ns, int pna, const char *rprop)
1010{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001011 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001012 int rlen;
1013 int rone;
1014 u64 offset = OF_BAD_ADDR;
1015
1016 /* Normally, an absence of a "ranges" property means we are
1017 * crossing a non-translatable boundary, and thus the addresses
1018 * below the current not cannot be converted to CPU physical ones.
1019 * Unfortunately, while this is very clear in the spec, it's not
1020 * what Apple understood, and they do have things like /uni-n or
1021 * /ht nodes with no "ranges" property and a lot of perfectly
1022 * useable mapped devices below them. Thus we treat the absence of
1023 * "ranges" as equivalent to an empty "ranges" property which means
1024 * a 1:1 translation at that level. It's up to the caller not to try
1025 * to translate addresses that aren't supposed to be translated in
1026 * the first place. --BenH.
1027 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001028 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001029 if (ranges == NULL || rlen == 0) {
1030 offset = of_read_number(addr, na);
1031 memset(addr, 0, pna * 4);
1032 debug("OF: no ranges, 1:1 translation\n");
1033 goto finish;
1034 }
1035
1036 debug("OF: walking ranges...\n");
1037
1038 /* Now walk through the ranges */
1039 rlen /= 4;
1040 rone = na + pna + ns;
1041 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1042 offset = bus->map(addr, ranges, na, ns, pna);
1043 if (offset != OF_BAD_ADDR)
1044 break;
1045 }
1046 if (offset == OF_BAD_ADDR) {
1047 debug("OF: not found !\n");
1048 return 1;
1049 }
1050 memcpy(addr, ranges + na, 4 * pna);
1051
1052 finish:
1053 of_dump_addr("OF: parent translation for:", addr, pna);
Simon Glasse48f3742014-11-11 12:47:07 -07001054 debug("OF: with offset: %" PRIu64 "\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001055
1056 /* Translate it into parent bus space */
1057 return pbus->translate(addr, offset, pna);
1058}
1059
1060/*
1061 * Translate an address from the device-tree into a CPU physical address,
1062 * this walks up the tree and applies the various bus mappings on the
1063 * way.
1064 *
1065 * Note: We consider that crossing any level with #size-cells == 0 to mean
1066 * that translation is impossible (that is we are not dealing with a value
1067 * that can be mapped to a cpu physical address). This is not really specified
1068 * that way, but this is traditionally the way IBM at least do things
1069 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001070static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1071 const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001072{
1073 int parent;
1074 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001075 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001076 int na, ns, pna, pns;
1077 u64 result = OF_BAD_ADDR;
1078
1079 debug("OF: ** translation for device %s **\n",
1080 fdt_get_name(blob, node_offset, NULL));
1081
1082 /* Get parent & match bus type */
1083 parent = fdt_parent_offset(blob, node_offset);
1084 if (parent < 0)
1085 goto bail;
1086 bus = &of_busses[0];
1087
1088 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001089 bus->count_cells(blob, parent, &na, &ns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001090 if (!OF_CHECK_COUNTS(na, ns)) {
1091 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1092 fdt_get_name(blob, node_offset, NULL));
1093 goto bail;
1094 }
1095 memcpy(addr, in_addr, na * 4);
1096
1097 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1098 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1099 of_dump_addr("OF: translating address:", addr, na);
1100
1101 /* Translate */
1102 for (;;) {
1103 /* Switch to parent bus */
1104 node_offset = parent;
1105 parent = fdt_parent_offset(blob, node_offset);
1106
1107 /* If root, we have finished */
1108 if (parent < 0) {
1109 debug("OF: reached root node\n");
1110 result = of_read_number(addr, na);
1111 break;
1112 }
1113
1114 /* Get new parent bus and counts */
1115 pbus = &of_busses[0];
Scott Wood6395f312010-08-12 18:37:39 -05001116 pbus->count_cells(blob, parent, &pna, &pns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001117 if (!OF_CHECK_COUNTS(pna, pns)) {
1118 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1119 fdt_get_name(blob, node_offset, NULL));
1120 break;
1121 }
1122
1123 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1124 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1125
1126 /* Apply bus translation */
1127 if (of_translate_one(blob, node_offset, bus, pbus,
1128 addr, na, ns, pna, rprop))
1129 break;
1130
1131 /* Complete the move up one level */
1132 na = pna;
1133 ns = pns;
1134 bus = pbus;
1135
1136 of_dump_addr("OF: one level translation:", addr, na);
1137 }
1138 bail:
1139
1140 return result;
1141}
1142
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001143u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001144{
1145 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1146}
Kumar Gala75e73af2010-07-04 12:48:21 -05001147
1148/**
1149 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1150 * who's reg property matches a physical cpu address
1151 *
1152 * @blob: ptr to device tree
1153 * @compat: compatiable string to match
1154 * @compat_off: property name
1155 *
1156 */
1157int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1158 phys_addr_t compat_off)
1159{
1160 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1161 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001162 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001163 if (reg) {
1164 if (compat_off == fdt_translate_address(blob, off, reg))
1165 return off;
1166 }
1167 off = fdt_node_offset_by_compatible(blob, off, compat);
1168 }
1169
1170 return -FDT_ERR_NOTFOUND;
1171}
1172
Kumar Galab4b847e2010-07-09 16:18:58 -05001173/**
1174 * fdt_alloc_phandle: Return next free phandle value
1175 *
1176 * @blob: ptr to device tree
1177 */
1178int fdt_alloc_phandle(void *blob)
1179{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001180 int offset;
1181 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001182
Kumar Galab4b847e2010-07-09 16:18:58 -05001183 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1184 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001185 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001186 }
1187
1188 return phandle + 1;
1189}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001190
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001191/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001192 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001193 *
1194 * @fdt: ptr to device tree
1195 * @nodeoffset: node to update
1196 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001197 */
1198int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001199{
1200 int ret;
1201
1202#ifdef DEBUG
1203 int off = fdt_node_offset_by_phandle(fdt, phandle);
1204
1205 if ((off >= 0) && (off != nodeoffset)) {
1206 char buf[64];
1207
1208 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1209 printf("Trying to update node %s with phandle %u ",
1210 buf, phandle);
1211
1212 fdt_get_path(fdt, off, buf, sizeof(buf));
1213 printf("that already exists in node %s.\n", buf);
1214 return -FDT_ERR_BADPHANDLE;
1215 }
1216#endif
1217
1218 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1219 if (ret < 0)
1220 return ret;
1221
1222 /*
1223 * For now, also set the deprecated "linux,phandle" property, so that we
1224 * don't break older kernels.
1225 */
1226 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1227
1228 return ret;
1229}
1230
Kumar Gala10aeabd2011-08-01 00:25:20 -05001231/*
1232 * fdt_create_phandle: Create a phandle property for the given node
1233 *
1234 * @fdt: ptr to device tree
1235 * @nodeoffset: node to update
1236 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001237unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001238{
1239 /* see if there is a phandle already */
1240 int phandle = fdt_get_phandle(fdt, nodeoffset);
1241
1242 /* if we got 0, means no phandle so create one */
1243 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001244 int ret;
1245
Kumar Gala10aeabd2011-08-01 00:25:20 -05001246 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001247 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1248 if (ret < 0) {
1249 printf("Can't set phandle %u: %s\n", phandle,
1250 fdt_strerror(ret));
1251 return 0;
1252 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001253 }
1254
1255 return phandle;
1256}
1257
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001258/*
1259 * fdt_set_node_status: Set status for the given node
1260 *
1261 * @fdt: ptr to device tree
1262 * @nodeoffset: node to update
1263 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1264 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1265 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1266 */
1267int fdt_set_node_status(void *fdt, int nodeoffset,
1268 enum fdt_status status, unsigned int error_code)
1269{
1270 char buf[16];
1271 int ret = 0;
1272
1273 if (nodeoffset < 0)
1274 return nodeoffset;
1275
1276 switch (status) {
1277 case FDT_STATUS_OKAY:
1278 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1279 break;
1280 case FDT_STATUS_DISABLED:
1281 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1282 break;
1283 case FDT_STATUS_FAIL:
1284 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1285 break;
1286 case FDT_STATUS_FAIL_ERROR_CODE:
1287 sprintf(buf, "fail-%d", error_code);
1288 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1289 break;
1290 default:
1291 printf("Invalid fdt status: %x\n", status);
1292 ret = -1;
1293 break;
1294 }
1295
1296 return ret;
1297}
1298
1299/*
1300 * fdt_set_status_by_alias: Set status for the given node given an alias
1301 *
1302 * @fdt: ptr to device tree
1303 * @alias: alias of node to update
1304 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1305 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1306 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1307 */
1308int fdt_set_status_by_alias(void *fdt, const char* alias,
1309 enum fdt_status status, unsigned int error_code)
1310{
1311 int offset = fdt_path_offset(fdt, alias);
1312
1313 return fdt_set_node_status(fdt, offset, status, error_code);
1314}
1315
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001316#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001317int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1318{
1319 int noff;
1320 int ret;
1321
1322 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1323 if (noff != -FDT_ERR_NOTFOUND) {
1324 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1325add_edid:
1326 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1327 if (ret == -FDT_ERR_NOSPACE) {
1328 ret = fdt_increase_size(blob, 512);
1329 if (!ret)
1330 goto add_edid;
1331 else
1332 goto err_size;
1333 } else if (ret < 0) {
1334 printf("Can't add property: %s\n", fdt_strerror(ret));
1335 return ret;
1336 }
1337 }
1338 return 0;
1339err_size:
1340 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1341 return ret;
1342}
1343#endif
Timur Tabibb682002011-05-03 13:24:07 -05001344
1345/*
1346 * Verify the physical address of device tree node for a given alias
1347 *
1348 * This function locates the device tree node of a given alias, and then
1349 * verifies that the physical address of that device matches the given
1350 * parameter. It displays a message if there is a mismatch.
1351 *
1352 * Returns 1 on success, 0 on failure
1353 */
1354int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1355{
1356 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001357 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001358 int node, len;
1359 u64 dt_addr;
1360
1361 path = fdt_getprop(fdt, anode, alias, NULL);
1362 if (!path) {
1363 /* If there's no such alias, then it's not a failure */
1364 return 1;
1365 }
1366
1367 node = fdt_path_offset(fdt, path);
1368 if (node < 0) {
1369 printf("Warning: device tree alias '%s' points to invalid "
1370 "node %s.\n", alias, path);
1371 return 0;
1372 }
1373
1374 reg = fdt_getprop(fdt, node, "reg", &len);
1375 if (!reg) {
1376 printf("Warning: device tree node '%s' has no address.\n",
1377 path);
1378 return 0;
1379 }
1380
1381 dt_addr = fdt_translate_address(fdt, node, reg);
1382 if (addr != dt_addr) {
Simon Glasse48f3742014-11-11 12:47:07 -07001383 printf("Warning: U-Boot configured device %s at address %"
1384 PRIx64 ",\n but the device tree has it address %"
1385 PRIx64 ".\n", alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001386 return 0;
1387 }
1388
1389 return 1;
1390}
1391
1392/*
1393 * Returns the base address of an SOC or PCI node
1394 */
1395u64 fdt_get_base_address(void *fdt, int node)
1396{
1397 int size;
1398 u32 naddr;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001399 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001400
Simon Glass933cdbb2014-10-23 18:58:57 -06001401 naddr = fdt_address_cells(fdt, node);
Timur Tabibb682002011-05-03 13:24:07 -05001402
1403 prop = fdt_getprop(fdt, node, "ranges", &size);
1404
1405 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1406}
Alexander Grafc48e6862014-04-11 17:09:41 +02001407
1408/*
1409 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1410 */
1411static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1412 uint64_t *val, int cells)
1413{
1414 const fdt32_t *prop32 = &prop[cell_off];
1415 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1416
1417 if ((cell_off + cells) > prop_len)
1418 return -FDT_ERR_NOSPACE;
1419
1420 switch (cells) {
1421 case 1:
1422 *val = fdt32_to_cpu(*prop32);
1423 break;
1424 case 2:
1425 *val = fdt64_to_cpu(*prop64);
1426 break;
1427 default:
1428 return -FDT_ERR_NOSPACE;
1429 }
1430
1431 return 0;
1432}
1433
1434/**
1435 * fdt_read_range - Read a node's n'th range property
1436 *
1437 * @fdt: ptr to device tree
1438 * @node: offset of node
1439 * @n: range index
1440 * @child_addr: pointer to storage for the "child address" field
1441 * @addr: pointer to storage for the CPU view translated physical start
1442 * @len: pointer to storage for the range length
1443 *
1444 * Convenience function that reads and interprets a specific range out of
1445 * a number of the "ranges" property array.
1446 */
1447int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1448 uint64_t *addr, uint64_t *len)
1449{
1450 int pnode = fdt_parent_offset(fdt, node);
1451 const fdt32_t *ranges;
1452 int pacells;
1453 int acells;
1454 int scells;
1455 int ranges_len;
1456 int cell = 0;
1457 int r = 0;
1458
1459 /*
1460 * The "ranges" property is an array of
1461 * { <child address> <parent address> <size in child address space> }
1462 *
1463 * All 3 elements can span a diffent number of cells. Fetch their size.
1464 */
1465 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1466 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1467 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1468
1469 /* Now try to get the ranges property */
1470 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1471 if (!ranges)
1472 return -FDT_ERR_NOTFOUND;
1473 ranges_len /= sizeof(uint32_t);
1474
1475 /* Jump to the n'th entry */
1476 cell = n * (pacells + acells + scells);
1477
1478 /* Read <child address> */
1479 if (child_addr) {
1480 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1481 acells);
1482 if (r)
1483 return r;
1484 }
1485 cell += acells;
1486
1487 /* Read <parent address> */
1488 if (addr)
1489 *addr = fdt_translate_address(fdt, node, ranges + cell);
1490 cell += pacells;
1491
1492 /* Read <size in child address space> */
1493 if (len) {
1494 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1495 if (r)
1496 return r;
1497 }
1498
1499 return 0;
1500}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001501
1502/**
1503 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1504 *
1505 * @fdt: ptr to device tree
1506 * @node: offset of the simplefb node
1507 * @base_address: framebuffer base address
1508 * @width: width in pixels
1509 * @height: height in pixels
1510 * @stride: bytes per line
1511 * @format: pixel format string
1512 *
1513 * Convenience function to fill and enable a simplefb node.
1514 */
1515int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1516 u32 height, u32 stride, const char *format)
1517{
1518 char name[32];
1519 fdt32_t cells[4];
1520 int i, addrc, sizec, ret;
1521
1522 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1523 &addrc, &sizec);
1524 i = 0;
1525 if (addrc == 2)
1526 cells[i++] = cpu_to_fdt32(base_address >> 32);
1527 cells[i++] = cpu_to_fdt32(base_address);
1528 if (sizec == 2)
1529 cells[i++] = 0;
1530 cells[i++] = cpu_to_fdt32(height * stride);
1531
1532 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1533 if (ret < 0)
1534 return ret;
1535
Simon Glassc3ec6462015-04-20 12:37:16 -06001536 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001537 ret = fdt_set_name(fdt, node, name);
1538 if (ret < 0)
1539 return ret;
1540
1541 ret = fdt_setprop_u32(fdt, node, "width", width);
1542 if (ret < 0)
1543 return ret;
1544
1545 ret = fdt_setprop_u32(fdt, node, "height", height);
1546 if (ret < 0)
1547 return ret;
1548
1549 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1550 if (ret < 0)
1551 return ret;
1552
1553 ret = fdt_setprop_string(fdt, node, "format", format);
1554 if (ret < 0)
1555 return ret;
1556
1557 ret = fdt_setprop_string(fdt, node, "status", "okay");
1558 if (ret < 0)
1559 return ret;
1560
1561 return 0;
1562}
Tim Harvey08daa252015-04-08 11:45:39 -07001563
1564/*
1565 * Update native-mode in display-timings from display environment variable.
1566 * The node to update are specified by path.
1567 */
1568int fdt_fixup_display(void *blob, const char *path, const char *display)
1569{
1570 int off, toff;
1571
1572 if (!display || !path)
1573 return -FDT_ERR_NOTFOUND;
1574
1575 toff = fdt_path_offset(blob, path);
1576 if (toff >= 0)
1577 toff = fdt_subnode_offset(blob, toff, "display-timings");
1578 if (toff < 0)
1579 return toff;
1580
1581 for (off = fdt_first_subnode(blob, toff);
1582 off >= 0;
1583 off = fdt_next_subnode(blob, off)) {
1584 uint32_t h = fdt_get_phandle(blob, off);
1585 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1586 fdt32_to_cpu(h));
1587 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1588 return fdt_setprop_u32(blob, toff, "native-mode", h);
1589 }
1590 return toff;
1591}