1 /* 2 * (C) Copyright 2007 3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com 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 40 /* 41 * fdt points to our working device tree. 42 */ 43 struct fdt_header *fdt; 44 45 /********************************************************************/ 46 47 int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force) 48 { 49 bd_t *bd = gd->bd; 50 int nodeoffset; 51 int err; 52 u32 tmp; /* used to set 32 bit integer properties */ 53 char *str; /* used to set string properties */ 54 55 err = fdt_check_header(fdt); 56 if (err < 0) { 57 printf("fdt_chosen: %s\n", fdt_strerror(err)); 58 return err; 59 } 60 61 if (initrd_start && initrd_end) { 62 struct fdt_reserve_entry re; 63 int used; 64 int total; 65 int j; 66 67 err = fdt_num_reservemap(fdt, &used, &total); 68 if (err < 0) { 69 printf("fdt_chosen: %s\n", fdt_strerror(err)); 70 return err; 71 } 72 if (used >= total) { 73 printf("WARNING: " 74 "no room in the reserved map (%d of %d)\n", 75 used, total); 76 return -1; 77 } 78 /* 79 * Look for an existing entry and update it. If we don't find 80 * the entry, we will j be the next available slot. 81 */ 82 for (j = 0; j < used; j++) { 83 err = fdt_get_reservemap(fdt, j, &re); 84 if (re.address == initrd_start) { 85 break; 86 } 87 } 88 err = fdt_replace_reservemap_entry(fdt, j, 89 initrd_start, initrd_end - initrd_start + 1); 90 if (err < 0) { 91 printf("fdt_chosen: %s\n", fdt_strerror(err)); 92 return err; 93 } 94 } 95 96 /* 97 * Find the "chosen" node. 98 */ 99 nodeoffset = fdt_find_node_by_path (fdt, "/chosen"); 100 101 /* 102 * If we have a "chosen" node already the "force the writing" 103 * is not set, our job is done. 104 */ 105 if ((nodeoffset >= 0) && !force) 106 return 0; 107 108 /* 109 * No "chosen" node in the blob: create it. 110 */ 111 if (nodeoffset < 0) { 112 /* 113 * Create a new node "/chosen" (offset 0 is root level) 114 */ 115 nodeoffset = fdt_add_subnode(fdt, 0, "chosen"); 116 if (nodeoffset < 0) { 117 printf("WARNING: could not create /chosen %s.\n", 118 fdt_strerror(nodeoffset)); 119 return nodeoffset; 120 } 121 } 122 123 /* 124 * Update pre-existing properties, create them if non-existant. 125 */ 126 str = getenv("bootargs"); 127 if (str != NULL) { 128 err = fdt_setprop(fdt, nodeoffset, 129 "bootargs", str, strlen(str)+1); 130 if (err < 0) 131 printf("WARNING: could not set bootargs %s.\n", 132 fdt_strerror(err)); 133 } 134 if (initrd_start && initrd_end) { 135 tmp = __cpu_to_be32(initrd_start); 136 err = fdt_setprop(fdt, nodeoffset, 137 "linux,initrd-start", &tmp, sizeof(tmp)); 138 if (err < 0) 139 printf("WARNING: " 140 "could not set linux,initrd-start %s.\n", 141 fdt_strerror(err)); 142 tmp = __cpu_to_be32(initrd_end); 143 err = fdt_setprop(fdt, nodeoffset, 144 "linux,initrd-end", &tmp, sizeof(tmp)); 145 if (err < 0) 146 printf("WARNING: could not set linux,initrd-end %s.\n", 147 fdt_strerror(err)); 148 } 149 #ifdef OF_STDOUT_PATH 150 err = fdt_setprop(fdt, nodeoffset, 151 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1); 152 if (err < 0) 153 printf("WARNING: could not set linux,stdout-path %s.\n", 154 fdt_strerror(err)); 155 #endif 156 157 return err; 158 } 159 160 /********************************************************************/ 161 162 #ifdef CONFIG_OF_HAS_UBOOT_ENV 163 164 /* Function that returns a character from the environment */ 165 extern uchar(*env_get_char) (int); 166 167 168 int fdt_env(void *fdt) 169 { 170 int nodeoffset; 171 int err; 172 int k, nxt; 173 int i; 174 static char tmpenv[256]; 175 176 err = fdt_check_header(fdt); 177 if (err < 0) { 178 printf("fdt_env: %s\n", fdt_strerror(err)); 179 return err; 180 } 181 182 /* 183 * See if we already have a "u-boot-env" node, delete it if so. 184 * Then create a new empty node. 185 */ 186 nodeoffset = fdt_find_node_by_path (fdt, "/u-boot-env"); 187 if (nodeoffset >= 0) { 188 err = fdt_del_node(fdt, nodeoffset); 189 if (err < 0) { 190 printf("fdt_env: %s\n", fdt_strerror(err)); 191 return err; 192 } 193 } 194 /* 195 * Create a new node "/u-boot-env" (offset 0 is root level) 196 */ 197 nodeoffset = fdt_add_subnode(fdt, 0, "u-boot-env"); 198 if (nodeoffset < 0) { 199 printf("WARNING: could not create /u-boot-env %s.\n", 200 fdt_strerror(nodeoffset)); 201 return nodeoffset; 202 } 203 204 for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) { 205 char *s, *lval, *rval; 206 207 /* 208 * Find the end of the name=definition 209 */ 210 for (nxt = i; env_get_char(nxt) != '\0'; ++nxt) 211 ; 212 s = tmpenv; 213 for (k = i; k < nxt && s < &tmpenv[sizeof(tmpenv) - 1]; ++k) 214 *s++ = env_get_char(k); 215 *s++ = '\0'; 216 lval = tmpenv; 217 /* 218 * Find the first '=': it separates the name from the value 219 */ 220 s = strchr(tmpenv, '='); 221 if (s != NULL) { 222 *s++ = '\0'; 223 rval = s; 224 } else 225 continue; 226 err = fdt_setprop(fdt, nodeoffset, lval, rval, strlen(rval)+1); 227 if (err < 0) { 228 printf("WARNING: could not set %s %s.\n", 229 lval, fdt_strerror(err)); 230 return err; 231 } 232 } 233 return 0; 234 } 235 #endif /* ifdef CONFIG_OF_HAS_UBOOT_ENV */ 236 237 /********************************************************************/ 238 239 #ifdef CONFIG_OF_HAS_BD_T 240 241 #define BDM(x) { .name = #x, .offset = offsetof(bd_t, bi_ ##x ) } 242 243 static const struct { 244 const char *name; 245 int offset; 246 } bd_map[] = { 247 BDM(memstart), 248 BDM(memsize), 249 BDM(flashstart), 250 BDM(flashsize), 251 BDM(flashoffset), 252 BDM(sramstart), 253 BDM(sramsize), 254 #if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) \ 255 || defined(CONFIG_E500) 256 BDM(immr_base), 257 #endif 258 #if defined(CONFIG_MPC5xxx) 259 BDM(mbar_base), 260 #endif 261 #if defined(CONFIG_MPC83XX) 262 BDM(immrbar), 263 #endif 264 #if defined(CONFIG_MPC8220) 265 BDM(mbar_base), 266 BDM(inpfreq), 267 BDM(pcifreq), 268 BDM(pevfreq), 269 BDM(flbfreq), 270 BDM(vcofreq), 271 #endif 272 BDM(bootflags), 273 BDM(ip_addr), 274 BDM(intfreq), 275 BDM(busfreq), 276 #ifdef CONFIG_CPM2 277 BDM(cpmfreq), 278 BDM(brgfreq), 279 BDM(sccfreq), 280 BDM(vco), 281 #endif 282 #if defined(CONFIG_MPC5xxx) 283 BDM(ipbfreq), 284 BDM(pcifreq), 285 #endif 286 BDM(baudrate), 287 }; 288 289 290 int fdt_bd_t(void *fdt) 291 { 292 bd_t *bd = gd->bd; 293 int nodeoffset; 294 int err; 295 u32 tmp; /* used to set 32 bit integer properties */ 296 int i; 297 298 err = fdt_check_header(fdt); 299 if (err < 0) { 300 printf("fdt_bd_t: %s\n", fdt_strerror(err)); 301 return err; 302 } 303 304 /* 305 * See if we already have a "bd_t" node, delete it if so. 306 * Then create a new empty node. 307 */ 308 nodeoffset = fdt_find_node_by_path (fdt, "/bd_t"); 309 if (nodeoffset >= 0) { 310 err = fdt_del_node(fdt, nodeoffset); 311 if (err < 0) { 312 printf("fdt_bd_t: %s\n", fdt_strerror(err)); 313 return err; 314 } 315 } 316 /* 317 * Create a new node "/bd_t" (offset 0 is root level) 318 */ 319 nodeoffset = fdt_add_subnode(fdt, 0, "bd_t"); 320 if (nodeoffset < 0) { 321 printf("WARNING: could not create /bd_t %s.\n", 322 fdt_strerror(nodeoffset)); 323 printf("fdt_bd_t: %s\n", fdt_strerror(nodeoffset)); 324 return nodeoffset; 325 } 326 /* 327 * Use the string/pointer structure to create the entries... 328 */ 329 for (i = 0; i < sizeof(bd_map)/sizeof(bd_map[0]); i++) { 330 tmp = cpu_to_be32(getenv("bootargs")); 331 err = fdt_setprop(fdt, nodeoffset, 332 bd_map[i].name, &tmp, sizeof(tmp)); 333 if (err < 0) 334 printf("WARNING: could not set %s %s.\n", 335 bd_map[i].name, fdt_strerror(err)); 336 } 337 /* 338 * Add a couple of oddball entries... 339 */ 340 err = fdt_setprop(fdt, nodeoffset, "enetaddr", &bd->bi_enetaddr, 6); 341 if (err < 0) 342 printf("WARNING: could not set enetaddr %s.\n", 343 fdt_strerror(err)); 344 err = fdt_setprop(fdt, nodeoffset, "ethspeed", &bd->bi_ethspeed, 4); 345 if (err < 0) 346 printf("WARNING: could not set ethspeed %s.\n", 347 fdt_strerror(err)); 348 return 0; 349 } 350 #endif /* ifdef CONFIG_OF_HAS_BD_T */ 351 352 #endif /* CONFIG_OF_LIBFDT */ 353