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 #include <asm/global_data.h> 28 #include <fdt.h> 29 #include <libfdt.h> 30 #include <fdt_support.h> 31 #include <exports.h> 32 33 /* 34 * Global data (for the gd->bd) 35 */ 36 DECLARE_GLOBAL_DATA_PTR; 37 38 39 /** 40 * fdt_find_and_setprop: Find a node and set it's property 41 * 42 * @fdt: ptr to device tree 43 * @node: path of node 44 * @prop: property name 45 * @val: ptr to new value 46 * @len: length of new property value 47 * @create: flag to create the property if it doesn't exist 48 * 49 * Convenience function to directly set a property given the path to the node. 50 */ 51 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, 52 const void *val, int len, int create) 53 { 54 int nodeoff = fdt_path_offset(fdt, node); 55 56 if (nodeoff < 0) 57 return nodeoff; 58 59 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL)) 60 return 0; /* create flag not set; so exit quietly */ 61 62 return fdt_setprop(fdt, nodeoff, prop, val, len); 63 } 64 65 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 66 static int fdt_fixup_stdout(void *fdt, int chosenoff) 67 { 68 int err = 0; 69 #ifdef CONFIG_CONS_INDEX 70 int node; 71 char sername[9] = { 0 }; 72 const char *path; 73 74 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); 75 76 err = node = fdt_path_offset(fdt, "/aliases"); 77 if (node >= 0) { 78 int len; 79 path = fdt_getprop(fdt, node, sername, &len); 80 if (path) { 81 char *p = malloc(len); 82 err = -FDT_ERR_NOSPACE; 83 if (p) { 84 memcpy(p, path, len); 85 err = fdt_setprop(fdt, chosenoff, 86 "linux,stdout-path", p, len); 87 free(p); 88 } 89 } else { 90 err = len; 91 } 92 } 93 #endif 94 if (err < 0) 95 printf("WARNING: could not set linux,stdout-path %s.\n", 96 fdt_strerror(err)); 97 98 return err; 99 } 100 #endif 101 102 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force) 103 { 104 int nodeoffset; 105 int err, j, total; 106 u32 tmp; 107 const char *path; 108 uint64_t addr, size; 109 110 /* Find the "chosen" node. */ 111 nodeoffset = fdt_path_offset (fdt, "/chosen"); 112 113 /* If there is no "chosen" node in the blob return */ 114 if (nodeoffset < 0) { 115 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset)); 116 return nodeoffset; 117 } 118 119 /* just return if initrd_start/end aren't valid */ 120 if ((initrd_start == 0) || (initrd_end == 0)) 121 return 0; 122 123 total = fdt_num_mem_rsv(fdt); 124 125 /* 126 * Look for an existing entry and update it. If we don't find 127 * the entry, we will j be the next available slot. 128 */ 129 for (j = 0; j < total; j++) { 130 err = fdt_get_mem_rsv(fdt, j, &addr, &size); 131 if (addr == initrd_start) { 132 fdt_del_mem_rsv(fdt, j); 133 break; 134 } 135 } 136 137 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start + 1); 138 if (err < 0) { 139 printf("fdt_initrd: %s\n", fdt_strerror(err)); 140 return err; 141 } 142 143 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL); 144 if ((path == NULL) || force) { 145 tmp = __cpu_to_be32(initrd_start); 146 err = fdt_setprop(fdt, nodeoffset, 147 "linux,initrd-start", &tmp, sizeof(tmp)); 148 if (err < 0) { 149 printf("WARNING: " 150 "could not set linux,initrd-start %s.\n", 151 fdt_strerror(err)); 152 return err; 153 } 154 tmp = __cpu_to_be32(initrd_end); 155 err = fdt_setprop(fdt, nodeoffset, 156 "linux,initrd-end", &tmp, sizeof(tmp)); 157 if (err < 0) { 158 printf("WARNING: could not set linux,initrd-end %s.\n", 159 fdt_strerror(err)); 160 161 return err; 162 } 163 } 164 165 return 0; 166 } 167 168 int fdt_chosen(void *fdt, int force) 169 { 170 int nodeoffset; 171 int err; 172 char *str; /* used to set string properties */ 173 const char *path; 174 175 err = fdt_check_header(fdt); 176 if (err < 0) { 177 printf("fdt_chosen: %s\n", fdt_strerror(err)); 178 return err; 179 } 180 181 /* 182 * Find the "chosen" node. 183 */ 184 nodeoffset = fdt_path_offset (fdt, "/chosen"); 185 186 /* 187 * If there is no "chosen" node in the blob, create it. 188 */ 189 if (nodeoffset < 0) { 190 /* 191 * Create a new node "/chosen" (offset 0 is root level) 192 */ 193 nodeoffset = fdt_add_subnode(fdt, 0, "chosen"); 194 if (nodeoffset < 0) { 195 printf("WARNING: could not create /chosen %s.\n", 196 fdt_strerror(nodeoffset)); 197 return nodeoffset; 198 } 199 } 200 201 /* 202 * Create /chosen properites that don't exist in the fdt. 203 * If the property exists, update it only if the "force" parameter 204 * is true. 205 */ 206 str = getenv("bootargs"); 207 if (str != NULL) { 208 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL); 209 if ((path == NULL) || force) { 210 err = fdt_setprop(fdt, nodeoffset, 211 "bootargs", str, strlen(str)+1); 212 if (err < 0) 213 printf("WARNING: could not set bootargs %s.\n", 214 fdt_strerror(err)); 215 } 216 } 217 218 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS 219 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 220 if ((path == NULL) || force) 221 err = fdt_fixup_stdout(fdt, nodeoffset); 222 #endif 223 224 #ifdef OF_STDOUT_PATH 225 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL); 226 if ((path == NULL) || force) { 227 err = fdt_setprop(fdt, nodeoffset, 228 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1); 229 if (err < 0) 230 printf("WARNING: could not set linux,stdout-path %s.\n", 231 fdt_strerror(err)); 232 } 233 #endif 234 235 return err; 236 } 237 238 void do_fixup_by_path(void *fdt, const char *path, const char *prop, 239 const void *val, int len, int create) 240 { 241 #if defined(DEBUG) 242 int i; 243 debug("Updating property '%s/%s' = ", path, prop); 244 for (i = 0; i < len; i++) 245 debug(" %.2x", *(u8*)(val+i)); 246 debug("\n"); 247 #endif 248 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); 249 if (rc) 250 printf("Unable to update property %s:%s, err=%s\n", 251 path, prop, fdt_strerror(rc)); 252 } 253 254 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, 255 u32 val, int create) 256 { 257 val = cpu_to_fdt32(val); 258 do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create); 259 } 260 261 void do_fixup_by_prop(void *fdt, 262 const char *pname, const void *pval, int plen, 263 const char *prop, const void *val, int len, 264 int create) 265 { 266 int off; 267 #if defined(DEBUG) 268 int i; 269 debug("Updating property '%s' = ", prop); 270 for (i = 0; i < len; i++) 271 debug(" %.2x", *(u8*)(val+i)); 272 debug("\n"); 273 #endif 274 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); 275 while (off != -FDT_ERR_NOTFOUND) { 276 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 277 fdt_setprop(fdt, off, prop, val, len); 278 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); 279 } 280 } 281 282 void do_fixup_by_prop_u32(void *fdt, 283 const char *pname, const void *pval, int plen, 284 const char *prop, u32 val, int create) 285 { 286 val = cpu_to_fdt32(val); 287 do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create); 288 } 289 290 void do_fixup_by_compat(void *fdt, const char *compat, 291 const char *prop, const void *val, int len, int create) 292 { 293 int off = -1; 294 #if defined(DEBUG) 295 int i; 296 debug("Updating property '%s' = ", prop); 297 for (i = 0; i < len; i++) 298 debug(" %.2x", *(u8*)(val+i)); 299 debug("\n"); 300 #endif 301 off = fdt_node_offset_by_compatible(fdt, -1, compat); 302 while (off != -FDT_ERR_NOTFOUND) { 303 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL)) 304 fdt_setprop(fdt, off, prop, val, len); 305 off = fdt_node_offset_by_compatible(fdt, off, compat); 306 } 307 } 308 309 void do_fixup_by_compat_u32(void *fdt, const char *compat, 310 const char *prop, u32 val, int create) 311 { 312 val = cpu_to_fdt32(val); 313 do_fixup_by_compat(fdt, compat, prop, &val, 4, create); 314 } 315 316 int fdt_fixup_memory(void *blob, u64 start, u64 size) 317 { 318 int err, nodeoffset, len = 0; 319 u8 tmp[16]; 320 const u32 *addrcell, *sizecell; 321 322 err = fdt_check_header(blob); 323 if (err < 0) { 324 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); 325 return err; 326 } 327 328 /* update, or add and update /memory node */ 329 nodeoffset = fdt_path_offset(blob, "/memory"); 330 if (nodeoffset < 0) { 331 nodeoffset = fdt_add_subnode(blob, 0, "memory"); 332 if (nodeoffset < 0) 333 printf("WARNING: could not create /memory: %s.\n", 334 fdt_strerror(nodeoffset)); 335 return nodeoffset; 336 } 337 err = fdt_setprop(blob, nodeoffset, "device_type", "memory", 338 sizeof("memory")); 339 if (err < 0) { 340 printf("WARNING: could not set %s %s.\n", "device_type", 341 fdt_strerror(err)); 342 return err; 343 } 344 345 addrcell = fdt_getprop(blob, 0, "#address-cells", NULL); 346 /* use shifts and mask to ensure endianness */ 347 if ((addrcell) && (*addrcell == 2)) { 348 tmp[0] = (start >> 56) & 0xff; 349 tmp[1] = (start >> 48) & 0xff; 350 tmp[2] = (start >> 40) & 0xff; 351 tmp[3] = (start >> 32) & 0xff; 352 tmp[4] = (start >> 24) & 0xff; 353 tmp[5] = (start >> 16) & 0xff; 354 tmp[6] = (start >> 8) & 0xff; 355 tmp[7] = (start ) & 0xff; 356 len = 8; 357 } else { 358 tmp[0] = (start >> 24) & 0xff; 359 tmp[1] = (start >> 16) & 0xff; 360 tmp[2] = (start >> 8) & 0xff; 361 tmp[3] = (start ) & 0xff; 362 len = 4; 363 } 364 365 sizecell = fdt_getprop(blob, 0, "#size-cells", NULL); 366 /* use shifts and mask to ensure endianness */ 367 if ((sizecell) && (*sizecell == 2)) { 368 tmp[0+len] = (size >> 56) & 0xff; 369 tmp[1+len] = (size >> 48) & 0xff; 370 tmp[2+len] = (size >> 40) & 0xff; 371 tmp[3+len] = (size >> 32) & 0xff; 372 tmp[4+len] = (size >> 24) & 0xff; 373 tmp[5+len] = (size >> 16) & 0xff; 374 tmp[6+len] = (size >> 8) & 0xff; 375 tmp[7+len] = (size ) & 0xff; 376 len += 8; 377 } else { 378 tmp[0+len] = (size >> 24) & 0xff; 379 tmp[1+len] = (size >> 16) & 0xff; 380 tmp[2+len] = (size >> 8) & 0xff; 381 tmp[3+len] = (size ) & 0xff; 382 len += 4; 383 } 384 385 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len); 386 if (err < 0) { 387 printf("WARNING: could not set %s %s.\n", 388 "reg", fdt_strerror(err)); 389 return err; 390 } 391 return 0; 392 } 393 394 void fdt_fixup_ethernet(void *fdt) 395 { 396 int node, i, j; 397 char enet[16], *tmp, *end; 398 char mac[16] = "ethaddr"; 399 const char *path; 400 unsigned char mac_addr[6]; 401 402 node = fdt_path_offset(fdt, "/aliases"); 403 if (node < 0) 404 return; 405 406 i = 0; 407 while ((tmp = getenv(mac)) != NULL) { 408 sprintf(enet, "ethernet%d", i); 409 path = fdt_getprop(fdt, node, enet, NULL); 410 if (!path) { 411 debug("No alias for %s\n", enet); 412 sprintf(mac, "eth%daddr", ++i); 413 continue; 414 } 415 416 for (j = 0; j < 6; j++) { 417 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0; 418 if (tmp) 419 tmp = (*end) ? end+1 : end; 420 } 421 422 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0); 423 do_fixup_by_path(fdt, path, "local-mac-address", 424 &mac_addr, 6, 1); 425 426 sprintf(mac, "eth%daddr", ++i); 427 } 428 } 429 430 #ifdef CONFIG_HAS_FSL_DR_USB 431 void fdt_fixup_dr_usb(void *blob, bd_t *bd) 432 { 433 char *mode; 434 char *type; 435 const char *compat = "fsl-usb2-dr"; 436 const char *prop_mode = "dr_mode"; 437 const char *prop_type = "phy_type"; 438 int node_offset; 439 int err; 440 441 mode = getenv("usb_dr_mode"); 442 type = getenv("usb_phy_type"); 443 if (!mode && !type) 444 return; 445 446 node_offset = fdt_node_offset_by_compatible(blob, 0, compat); 447 if (node_offset < 0) { 448 printf("WARNING: could not find compatible node %s: %s.\n", 449 compat, fdt_strerror(node_offset)); 450 return; 451 } 452 453 if (mode) { 454 err = fdt_setprop(blob, node_offset, prop_mode, mode, 455 strlen(mode) + 1); 456 if (err < 0) 457 printf("WARNING: could not set %s for %s: %s.\n", 458 prop_mode, compat, fdt_strerror(err)); 459 } 460 461 if (type) { 462 err = fdt_setprop(blob, node_offset, prop_type, type, 463 strlen(type) + 1); 464 if (err < 0) 465 printf("WARNING: could not set %s for %s: %s.\n", 466 prop_type, compat, fdt_strerror(err)); 467 } 468 } 469 #endif /* CONFIG_HAS_FSL_DR_USB */ 470 471 #if defined(CONFIG_MPC83XX) || defined(CONFIG_MPC85xx) 472 /* 473 * update crypto node properties to a specified revision of the SEC 474 * called with sec_rev == 0 if not on an mpc8xxxE processor 475 */ 476 void fdt_fixup_crypto_node(void *blob, int sec_rev) 477 { 478 const struct sec_rev_prop { 479 u32 sec_rev; 480 u32 num_channels; 481 u32 channel_fifo_len; 482 u32 exec_units_mask; 483 u32 descriptor_types_mask; 484 } sec_rev_prop_list [] = { 485 { 0x0200, 4, 24, 0x07e, 0x01010ebf }, /* SEC 2.0 */ 486 { 0x0201, 4, 24, 0x0fe, 0x012b0ebf }, /* SEC 2.1 */ 487 { 0x0202, 1, 24, 0x04c, 0x0122003f }, /* SEC 2.2 */ 488 { 0x0204, 4, 24, 0x07e, 0x012b0ebf }, /* SEC 2.4 */ 489 { 0x0300, 4, 24, 0x9fe, 0x03ab0ebf }, /* SEC 3.0 */ 490 { 0x0303, 4, 24, 0x97c, 0x03ab0abf }, /* SEC 3.3 */ 491 }; 492 char compat_strlist[ARRAY_SIZE(sec_rev_prop_list) * 493 sizeof("fsl,secX.Y")]; 494 int crypto_node, sec_idx, err; 495 char *p; 496 u32 val; 497 498 /* locate crypto node based on lowest common compatible */ 499 crypto_node = fdt_node_offset_by_compatible(blob, -1, "fsl,sec2.0"); 500 if (crypto_node == -FDT_ERR_NOTFOUND) 501 return; 502 503 /* delete it if not on an E-processor */ 504 if (crypto_node > 0 && !sec_rev) { 505 fdt_del_node(blob, crypto_node); 506 return; 507 } 508 509 /* else we got called for possible uprev */ 510 for (sec_idx = 0; sec_idx < ARRAY_SIZE(sec_rev_prop_list); sec_idx++) 511 if (sec_rev_prop_list[sec_idx].sec_rev == sec_rev) 512 break; 513 514 if (sec_idx == ARRAY_SIZE(sec_rev_prop_list)) { 515 puts("warning: unknown SEC revision number\n"); 516 return; 517 } 518 519 val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].num_channels); 520 err = fdt_setprop(blob, crypto_node, "fsl,num-channels", &val, 4); 521 if (err < 0) 522 printf("WARNING: could not set crypto property: %s\n", 523 fdt_strerror(err)); 524 525 val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].descriptor_types_mask); 526 err = fdt_setprop(blob, crypto_node, "fsl,descriptor-types-mask", &val, 4); 527 if (err < 0) 528 printf("WARNING: could not set crypto property: %s\n", 529 fdt_strerror(err)); 530 531 val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].exec_units_mask); 532 err = fdt_setprop(blob, crypto_node, "fsl,exec-units-mask", &val, 4); 533 if (err < 0) 534 printf("WARNING: could not set crypto property: %s\n", 535 fdt_strerror(err)); 536 537 val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].channel_fifo_len); 538 err = fdt_setprop(blob, crypto_node, "fsl,channel-fifo-len", &val, 4); 539 if (err < 0) 540 printf("WARNING: could not set crypto property: %s\n", 541 fdt_strerror(err)); 542 543 val = 0; 544 while (sec_idx >= 0) { 545 p = compat_strlist + val; 546 val += sprintf(p, "fsl,sec%d.%d", 547 (sec_rev_prop_list[sec_idx].sec_rev & 0xff00) >> 8, 548 sec_rev_prop_list[sec_idx].sec_rev & 0x00ff) + 1; 549 sec_idx--; 550 } 551 err = fdt_setprop(blob, crypto_node, "compatible", &compat_strlist, val); 552 if (err < 0) 553 printf("WARNING: could not set crypto property: %s\n", 554 fdt_strerror(err)); 555 } 556 #endif /* defined(CONFIG_MPC83XX) || defined(CONFIG_MPC85xx) */ 557 558 /* Resize the fdt to its actual size + a bit of padding */ 559 int fdt_resize(void *blob) 560 { 561 int i; 562 uint64_t addr, size; 563 int total, ret; 564 uint actualsize; 565 566 if (!blob) 567 return 0; 568 569 total = fdt_num_mem_rsv(blob); 570 for (i = 0; i < total; i++) { 571 fdt_get_mem_rsv(blob, i, &addr, &size); 572 if (addr == (uint64_t)(u32)blob) { 573 fdt_del_mem_rsv(blob, i); 574 break; 575 } 576 } 577 578 /* Calculate the actual size of the fdt */ 579 actualsize = fdt_off_dt_strings(blob) + 580 fdt_size_dt_strings(blob); 581 582 /* Make it so the fdt ends on a page boundary */ 583 actualsize = ALIGN(actualsize, 0x1000); 584 actualsize = actualsize - ((uint)blob & 0xfff); 585 586 /* Change the fdt header to reflect the correct size */ 587 fdt_set_totalsize(blob, actualsize); 588 589 /* Add the new reservation */ 590 ret = fdt_add_mem_rsv(blob, (uint)blob, actualsize); 591 if (ret < 0) 592 return ret; 593 594 return actualsize; 595 } 596