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64dbbd40 GVB |
1 | /* |
2 | * (C) Copyright 2007 | |
3 | * Gerald Van Baren, Custom IDEAS, [email protected] | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <linux/ctype.h> | |
26 | #include <linux/types.h> | |
27 | ||
28 | #ifdef CONFIG_OF_LIBFDT | |
29 | ||
30 | #include <asm/global_data.h> | |
31 | #include <fdt.h> | |
32 | #include <libfdt.h> | |
33 | #include <fdt_support.h> | |
34 | ||
35 | /* | |
36 | * Global data (for the gd->bd) | |
37 | */ | |
38 | DECLARE_GLOBAL_DATA_PTR; | |
39 | ||
bb930e76 GVB |
40 | /* |
41 | * fdt points to our working device tree. | |
42 | */ | |
43 | struct fdt_header *fdt; | |
44 | ||
64dbbd40 GVB |
45 | /********************************************************************/ |
46 | ||
a3c2933e KG |
47 | /** |
48 | * fdt_find_and_setprop: Find a node and set it's property | |
49 | * | |
50 | * @fdt: ptr to device tree | |
51 | * @node: path of node | |
52 | * @prop: property name | |
53 | * @val: ptr to new value | |
54 | * @len: length of new property value | |
55 | * @create: flag to create the property if it doesn't exist | |
56 | * | |
57 | * Convenience function to directly set a property given the path to the node. | |
58 | */ | |
59 | int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, | |
60 | const void *val, int len, int create) | |
61 | { | |
62 | int nodeoff = fdt_find_node_by_path(fdt, node); | |
63 | ||
64 | if (nodeoff < 0) | |
65 | return nodeoff; | |
66 | ||
67 | if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL)) | |
68 | return 0; /* create flag not set; so exit quietly */ | |
69 | ||
70 | return fdt_setprop(fdt, nodeoff, prop, val, len); | |
71 | } | |
72 | ||
64dbbd40 GVB |
73 | int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force) |
74 | { | |
64dbbd40 GVB |
75 | int nodeoffset; |
76 | int err; | |
35ec398f GVB |
77 | u32 tmp; /* used to set 32 bit integer properties */ |
78 | char *str; /* used to set string properties */ | |
64dbbd40 GVB |
79 | |
80 | err = fdt_check_header(fdt); | |
81 | if (err < 0) { | |
5fe6be62 | 82 | printf("fdt_chosen: %s\n", fdt_strerror(err)); |
64dbbd40 GVB |
83 | return err; |
84 | } | |
85 | ||
64dbbd40 | 86 | if (initrd_start && initrd_end) { |
7651f8bd | 87 | struct fdt_reserve_entry re; |
c28abb9c GVB |
88 | int used; |
89 | int total; | |
90 | int j; | |
91 | ||
92 | err = fdt_num_reservemap(fdt, &used, &total); | |
93 | if (err < 0) { | |
5fe6be62 | 94 | printf("fdt_chosen: %s\n", fdt_strerror(err)); |
c28abb9c GVB |
95 | return err; |
96 | } | |
97 | if (used >= total) { | |
5fe6be62 | 98 | printf("WARNING: " |
35ec398f | 99 | "no room in the reserved map (%d of %d)\n", |
c28abb9c GVB |
100 | used, total); |
101 | return -1; | |
102 | } | |
103 | /* | |
104 | * Look for an existing entry and update it. If we don't find | |
105 | * the entry, we will j be the next available slot. | |
106 | */ | |
107 | for (j = 0; j < used; j++) { | |
108 | err = fdt_get_reservemap(fdt, j, &re); | |
7651f8bd | 109 | if (re.address == initrd_start) { |
c28abb9c GVB |
110 | break; |
111 | } | |
112 | } | |
113 | err = fdt_replace_reservemap_entry(fdt, j, | |
64dbbd40 GVB |
114 | initrd_start, initrd_end - initrd_start + 1); |
115 | if (err < 0) { | |
5fe6be62 | 116 | printf("fdt_chosen: %s\n", fdt_strerror(err)); |
64dbbd40 GVB |
117 | return err; |
118 | } | |
119 | } | |
120 | ||
121 | /* | |
122 | * Find the "chosen" node. | |
123 | */ | |
1a861169 | 124 | nodeoffset = fdt_find_node_by_path (fdt, "/chosen"); |
64dbbd40 GVB |
125 | |
126 | /* | |
127 | * If we have a "chosen" node already the "force the writing" | |
128 | * is not set, our job is done. | |
129 | */ | |
130 | if ((nodeoffset >= 0) && !force) | |
131 | return 0; | |
132 | ||
133 | /* | |
134 | * No "chosen" node in the blob: create it. | |
135 | */ | |
136 | if (nodeoffset < 0) { | |
137 | /* | |
138 | * Create a new node "/chosen" (offset 0 is root level) | |
139 | */ | |
140 | nodeoffset = fdt_add_subnode(fdt, 0, "chosen"); | |
141 | if (nodeoffset < 0) { | |
5fe6be62 | 142 | printf("WARNING: could not create /chosen %s.\n", |
35ec398f | 143 | fdt_strerror(nodeoffset)); |
64dbbd40 GVB |
144 | return nodeoffset; |
145 | } | |
146 | } | |
147 | ||
148 | /* | |
149 | * Update pre-existing properties, create them if non-existant. | |
150 | */ | |
151 | str = getenv("bootargs"); | |
152 | if (str != NULL) { | |
35ec398f GVB |
153 | err = fdt_setprop(fdt, nodeoffset, |
154 | "bootargs", str, strlen(str)+1); | |
64dbbd40 | 155 | if (err < 0) |
5fe6be62 | 156 | printf("WARNING: could not set bootargs %s.\n", |
35ec398f | 157 | fdt_strerror(err)); |
64dbbd40 GVB |
158 | } |
159 | if (initrd_start && initrd_end) { | |
160 | tmp = __cpu_to_be32(initrd_start); | |
35ec398f GVB |
161 | err = fdt_setprop(fdt, nodeoffset, |
162 | "linux,initrd-start", &tmp, sizeof(tmp)); | |
64dbbd40 | 163 | if (err < 0) |
5fe6be62 GVB |
164 | printf("WARNING: " |
165 | "could not set linux,initrd-start %s.\n", | |
35ec398f | 166 | fdt_strerror(err)); |
64dbbd40 | 167 | tmp = __cpu_to_be32(initrd_end); |
35ec398f GVB |
168 | err = fdt_setprop(fdt, nodeoffset, |
169 | "linux,initrd-end", &tmp, sizeof(tmp)); | |
64dbbd40 | 170 | if (err < 0) |
5fe6be62 | 171 | printf("WARNING: could not set linux,initrd-end %s.\n", |
35ec398f | 172 | fdt_strerror(err)); |
64dbbd40 GVB |
173 | } |
174 | #ifdef OF_STDOUT_PATH | |
35ec398f GVB |
175 | err = fdt_setprop(fdt, nodeoffset, |
176 | "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1); | |
64dbbd40 | 177 | if (err < 0) |
5fe6be62 | 178 | printf("WARNING: could not set linux,stdout-path %s.\n", |
35ec398f | 179 | fdt_strerror(err)); |
64dbbd40 GVB |
180 | #endif |
181 | ||
64dbbd40 GVB |
182 | return err; |
183 | } | |
184 | ||
185 | /********************************************************************/ | |
186 | ||
187 | #ifdef CONFIG_OF_HAS_UBOOT_ENV | |
188 | ||
189 | /* Function that returns a character from the environment */ | |
190 | extern uchar(*env_get_char) (int); | |
191 | ||
192 | ||
193 | int fdt_env(void *fdt) | |
194 | { | |
195 | int nodeoffset; | |
196 | int err; | |
197 | int k, nxt; | |
198 | int i; | |
199 | static char tmpenv[256]; | |
200 | ||
201 | err = fdt_check_header(fdt); | |
202 | if (err < 0) { | |
5fe6be62 | 203 | printf("fdt_env: %s\n", fdt_strerror(err)); |
64dbbd40 GVB |
204 | return err; |
205 | } | |
206 | ||
207 | /* | |
208 | * See if we already have a "u-boot-env" node, delete it if so. | |
209 | * Then create a new empty node. | |
210 | */ | |
1a861169 | 211 | nodeoffset = fdt_find_node_by_path (fdt, "/u-boot-env"); |
64dbbd40 GVB |
212 | if (nodeoffset >= 0) { |
213 | err = fdt_del_node(fdt, nodeoffset); | |
214 | if (err < 0) { | |
5fe6be62 | 215 | printf("fdt_env: %s\n", fdt_strerror(err)); |
64dbbd40 GVB |
216 | return err; |
217 | } | |
218 | } | |
219 | /* | |
220 | * Create a new node "/u-boot-env" (offset 0 is root level) | |
221 | */ | |
222 | nodeoffset = fdt_add_subnode(fdt, 0, "u-boot-env"); | |
223 | if (nodeoffset < 0) { | |
5fe6be62 | 224 | printf("WARNING: could not create /u-boot-env %s.\n", |
35ec398f | 225 | fdt_strerror(nodeoffset)); |
64dbbd40 GVB |
226 | return nodeoffset; |
227 | } | |
228 | ||
229 | for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) { | |
230 | char *s, *lval, *rval; | |
231 | ||
232 | /* | |
233 | * Find the end of the name=definition | |
234 | */ | |
235 | for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) | |
236 | ; | |
237 | s = tmpenv; | |
238 | for (k = i; k < nxt && s < &tmpenv[sizeof(tmpenv) - 1]; ++k) | |
239 | *s++ = env_get_char(k); | |
240 | *s++ = '\0'; | |
241 | lval = tmpenv; | |
242 | /* | |
243 | * Find the first '=': it separates the name from the value | |
244 | */ | |
245 | s = strchr(tmpenv, '='); | |
246 | if (s != NULL) { | |
247 | *s++ = '\0'; | |
248 | rval = s; | |
249 | } else | |
250 | continue; | |
251 | err = fdt_setprop(fdt, nodeoffset, lval, rval, strlen(rval)+1); | |
252 | if (err < 0) { | |
5fe6be62 | 253 | printf("WARNING: could not set %s %s.\n", |
35ec398f | 254 | lval, fdt_strerror(err)); |
64dbbd40 GVB |
255 | return err; |
256 | } | |
257 | } | |
258 | return 0; | |
259 | } | |
c28abb9c | 260 | #endif /* ifdef CONFIG_OF_HAS_UBOOT_ENV */ |
64dbbd40 GVB |
261 | |
262 | /********************************************************************/ | |
263 | ||
264 | #ifdef CONFIG_OF_HAS_BD_T | |
265 | ||
266 | #define BDM(x) { .name = #x, .offset = offsetof(bd_t, bi_ ##x ) } | |
267 | ||
268 | static const struct { | |
269 | const char *name; | |
270 | int offset; | |
271 | } bd_map[] = { | |
272 | BDM(memstart), | |
273 | BDM(memsize), | |
274 | BDM(flashstart), | |
275 | BDM(flashsize), | |
276 | BDM(flashoffset), | |
277 | BDM(sramstart), | |
278 | BDM(sramsize), | |
279 | #if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) \ | |
280 | || defined(CONFIG_E500) | |
281 | BDM(immr_base), | |
282 | #endif | |
283 | #if defined(CONFIG_MPC5xxx) | |
284 | BDM(mbar_base), | |
285 | #endif | |
286 | #if defined(CONFIG_MPC83XX) | |
287 | BDM(immrbar), | |
288 | #endif | |
289 | #if defined(CONFIG_MPC8220) | |
290 | BDM(mbar_base), | |
291 | BDM(inpfreq), | |
292 | BDM(pcifreq), | |
293 | BDM(pevfreq), | |
294 | BDM(flbfreq), | |
295 | BDM(vcofreq), | |
296 | #endif | |
297 | BDM(bootflags), | |
298 | BDM(ip_addr), | |
299 | BDM(intfreq), | |
300 | BDM(busfreq), | |
301 | #ifdef CONFIG_CPM2 | |
302 | BDM(cpmfreq), | |
303 | BDM(brgfreq), | |
304 | BDM(sccfreq), | |
305 | BDM(vco), | |
306 | #endif | |
307 | #if defined(CONFIG_MPC5xxx) | |
308 | BDM(ipbfreq), | |
309 | BDM(pcifreq), | |
310 | #endif | |
311 | BDM(baudrate), | |
312 | }; | |
313 | ||
314 | ||
315 | int fdt_bd_t(void *fdt) | |
316 | { | |
317 | bd_t *bd = gd->bd; | |
318 | int nodeoffset; | |
319 | int err; | |
35ec398f | 320 | u32 tmp; /* used to set 32 bit integer properties */ |
64dbbd40 GVB |
321 | int i; |
322 | ||
323 | err = fdt_check_header(fdt); | |
324 | if (err < 0) { | |
5fe6be62 | 325 | printf("fdt_bd_t: %s\n", fdt_strerror(err)); |
64dbbd40 GVB |
326 | return err; |
327 | } | |
328 | ||
329 | /* | |
330 | * See if we already have a "bd_t" node, delete it if so. | |
331 | * Then create a new empty node. | |
332 | */ | |
1a861169 | 333 | nodeoffset = fdt_find_node_by_path (fdt, "/bd_t"); |
64dbbd40 GVB |
334 | if (nodeoffset >= 0) { |
335 | err = fdt_del_node(fdt, nodeoffset); | |
336 | if (err < 0) { | |
5fe6be62 | 337 | printf("fdt_bd_t: %s\n", fdt_strerror(err)); |
64dbbd40 GVB |
338 | return err; |
339 | } | |
340 | } | |
341 | /* | |
342 | * Create a new node "/bd_t" (offset 0 is root level) | |
343 | */ | |
344 | nodeoffset = fdt_add_subnode(fdt, 0, "bd_t"); | |
345 | if (nodeoffset < 0) { | |
5fe6be62 | 346 | printf("WARNING: could not create /bd_t %s.\n", |
35ec398f | 347 | fdt_strerror(nodeoffset)); |
5fe6be62 | 348 | printf("fdt_bd_t: %s\n", fdt_strerror(nodeoffset)); |
64dbbd40 GVB |
349 | return nodeoffset; |
350 | } | |
351 | /* | |
352 | * Use the string/pointer structure to create the entries... | |
353 | */ | |
354 | for (i = 0; i < sizeof(bd_map)/sizeof(bd_map[0]); i++) { | |
355 | tmp = cpu_to_be32(getenv("bootargs")); | |
35ec398f GVB |
356 | err = fdt_setprop(fdt, nodeoffset, |
357 | bd_map[i].name, &tmp, sizeof(tmp)); | |
64dbbd40 | 358 | if (err < 0) |
5fe6be62 | 359 | printf("WARNING: could not set %s %s.\n", |
35ec398f | 360 | bd_map[i].name, fdt_strerror(err)); |
64dbbd40 GVB |
361 | } |
362 | /* | |
363 | * Add a couple of oddball entries... | |
364 | */ | |
365 | err = fdt_setprop(fdt, nodeoffset, "enetaddr", &bd->bi_enetaddr, 6); | |
366 | if (err < 0) | |
5fe6be62 | 367 | printf("WARNING: could not set enetaddr %s.\n", |
35ec398f | 368 | fdt_strerror(err)); |
64dbbd40 GVB |
369 | err = fdt_setprop(fdt, nodeoffset, "ethspeed", &bd->bi_ethspeed, 4); |
370 | if (err < 0) | |
5fe6be62 | 371 | printf("WARNING: could not set ethspeed %s.\n", |
35ec398f | 372 | fdt_strerror(err)); |
64dbbd40 GVB |
373 | return 0; |
374 | } | |
c28abb9c | 375 | #endif /* ifdef CONFIG_OF_HAS_BD_T */ |
64dbbd40 GVB |
376 | |
377 | #endif /* CONFIG_OF_LIBFDT */ |