1 /* 2 * Copyright (c) 2013 Broadcom Corporation 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include <linux/efi.h> 18 #include <linux/kernel.h> 19 #include <linux/slab.h> 20 #include <linux/device.h> 21 #include <linux/firmware.h> 22 #include <linux/module.h> 23 #include <linux/bcm47xx_nvram.h> 24 25 #include "debug.h" 26 #include "firmware.h" 27 #include "core.h" 28 #include "common.h" 29 #include "chip.h" 30 31 #define BRCMF_FW_MAX_NVRAM_SIZE 64000 32 #define BRCMF_FW_NVRAM_DEVPATH_LEN 19 /* devpath0=pcie/1/4/ */ 33 #define BRCMF_FW_NVRAM_PCIEDEV_LEN 10 /* pcie/1/4/ + \0 */ 34 #define BRCMF_FW_DEFAULT_BOARDREV "boardrev=0xff" 35 36 enum nvram_parser_state { 37 IDLE, 38 KEY, 39 VALUE, 40 COMMENT, 41 END 42 }; 43 44 /** 45 * struct nvram_parser - internal info for parser. 46 * 47 * @state: current parser state. 48 * @data: input buffer being parsed. 49 * @nvram: output buffer with parse result. 50 * @nvram_len: length of parse result. 51 * @line: current line. 52 * @column: current column in line. 53 * @pos: byte offset in input buffer. 54 * @entry: start position of key,value entry. 55 * @multi_dev_v1: detect pcie multi device v1 (compressed). 56 * @multi_dev_v2: detect pcie multi device v2. 57 * @boardrev_found: nvram contains boardrev information. 58 */ 59 struct nvram_parser { 60 enum nvram_parser_state state; 61 const u8 *data; 62 u8 *nvram; 63 u32 nvram_len; 64 u32 line; 65 u32 column; 66 u32 pos; 67 u32 entry; 68 bool multi_dev_v1; 69 bool multi_dev_v2; 70 bool boardrev_found; 71 }; 72 73 /** 74 * is_nvram_char() - check if char is a valid one for NVRAM entry 75 * 76 * It accepts all printable ASCII chars except for '#' which opens a comment. 77 * Please note that ' ' (space) while accepted is not a valid key name char. 78 */ 79 static bool is_nvram_char(char c) 80 { 81 /* comment marker excluded */ 82 if (c == '#') 83 return false; 84 85 /* key and value may have any other readable character */ 86 return (c >= 0x20 && c < 0x7f); 87 } 88 89 static bool is_whitespace(char c) 90 { 91 return (c == ' ' || c == '\r' || c == '\n' || c == '\t'); 92 } 93 94 static enum nvram_parser_state brcmf_nvram_handle_idle(struct nvram_parser *nvp) 95 { 96 char c; 97 98 c = nvp->data[nvp->pos]; 99 if (c == '\n') 100 return COMMENT; 101 if (is_whitespace(c) || c == '\0') 102 goto proceed; 103 if (c == '#') 104 return COMMENT; 105 if (is_nvram_char(c)) { 106 nvp->entry = nvp->pos; 107 return KEY; 108 } 109 brcmf_dbg(INFO, "warning: ln=%d:col=%d: ignoring invalid character\n", 110 nvp->line, nvp->column); 111 proceed: 112 nvp->column++; 113 nvp->pos++; 114 return IDLE; 115 } 116 117 static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp) 118 { 119 enum nvram_parser_state st = nvp->state; 120 char c; 121 122 c = nvp->data[nvp->pos]; 123 if (c == '=') { 124 /* ignore RAW1 by treating as comment */ 125 if (strncmp(&nvp->data[nvp->entry], "RAW1", 4) == 0) 126 st = COMMENT; 127 else 128 st = VALUE; 129 if (strncmp(&nvp->data[nvp->entry], "devpath", 7) == 0) 130 nvp->multi_dev_v1 = true; 131 if (strncmp(&nvp->data[nvp->entry], "pcie/", 5) == 0) 132 nvp->multi_dev_v2 = true; 133 if (strncmp(&nvp->data[nvp->entry], "boardrev", 8) == 0) 134 nvp->boardrev_found = true; 135 } else if (!is_nvram_char(c) || c == ' ') { 136 brcmf_dbg(INFO, "warning: ln=%d:col=%d: '=' expected, skip invalid key entry\n", 137 nvp->line, nvp->column); 138 return COMMENT; 139 } 140 141 nvp->column++; 142 nvp->pos++; 143 return st; 144 } 145 146 static enum nvram_parser_state 147 brcmf_nvram_handle_value(struct nvram_parser *nvp) 148 { 149 char c; 150 char *skv; 151 char *ekv; 152 u32 cplen; 153 154 c = nvp->data[nvp->pos]; 155 if (!is_nvram_char(c)) { 156 /* key,value pair complete */ 157 ekv = (u8 *)&nvp->data[nvp->pos]; 158 skv = (u8 *)&nvp->data[nvp->entry]; 159 cplen = ekv - skv; 160 if (nvp->nvram_len + cplen + 1 >= BRCMF_FW_MAX_NVRAM_SIZE) 161 return END; 162 /* copy to output buffer */ 163 memcpy(&nvp->nvram[nvp->nvram_len], skv, cplen); 164 nvp->nvram_len += cplen; 165 nvp->nvram[nvp->nvram_len] = '\0'; 166 nvp->nvram_len++; 167 return IDLE; 168 } 169 nvp->pos++; 170 nvp->column++; 171 return VALUE; 172 } 173 174 static enum nvram_parser_state 175 brcmf_nvram_handle_comment(struct nvram_parser *nvp) 176 { 177 char *eoc, *sol; 178 179 sol = (char *)&nvp->data[nvp->pos]; 180 eoc = strchr(sol, '\n'); 181 if (!eoc) { 182 eoc = strchr(sol, '\0'); 183 if (!eoc) 184 return END; 185 } 186 187 /* eat all moving to next line */ 188 nvp->line++; 189 nvp->column = 1; 190 nvp->pos += (eoc - sol) + 1; 191 return IDLE; 192 } 193 194 static enum nvram_parser_state brcmf_nvram_handle_end(struct nvram_parser *nvp) 195 { 196 /* final state */ 197 return END; 198 } 199 200 static enum nvram_parser_state 201 (*nv_parser_states[])(struct nvram_parser *nvp) = { 202 brcmf_nvram_handle_idle, 203 brcmf_nvram_handle_key, 204 brcmf_nvram_handle_value, 205 brcmf_nvram_handle_comment, 206 brcmf_nvram_handle_end 207 }; 208 209 static int brcmf_init_nvram_parser(struct nvram_parser *nvp, 210 const u8 *data, size_t data_len) 211 { 212 size_t size; 213 214 memset(nvp, 0, sizeof(*nvp)); 215 nvp->data = data; 216 /* Limit size to MAX_NVRAM_SIZE, some files contain lot of comment */ 217 if (data_len > BRCMF_FW_MAX_NVRAM_SIZE) 218 size = BRCMF_FW_MAX_NVRAM_SIZE; 219 else 220 size = data_len; 221 /* Alloc for extra 0 byte + roundup by 4 + length field */ 222 size += 1 + 3 + sizeof(u32); 223 nvp->nvram = kzalloc(size, GFP_KERNEL); 224 if (!nvp->nvram) 225 return -ENOMEM; 226 227 nvp->line = 1; 228 nvp->column = 1; 229 return 0; 230 } 231 232 /* brcmf_fw_strip_multi_v1 :Some nvram files contain settings for multiple 233 * devices. Strip it down for one device, use domain_nr/bus_nr to determine 234 * which data is to be returned. v1 is the version where nvram is stored 235 * compressed and "devpath" maps to index for valid entries. 236 */ 237 static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr, 238 u16 bus_nr) 239 { 240 /* Device path with a leading '=' key-value separator */ 241 char pci_path[] = "=pci/?/?"; 242 size_t pci_len; 243 char pcie_path[] = "=pcie/?/?"; 244 size_t pcie_len; 245 246 u32 i, j; 247 bool found; 248 u8 *nvram; 249 u8 id; 250 251 nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); 252 if (!nvram) 253 goto fail; 254 255 /* min length: devpath0=pcie/1/4/ + 0:x=y */ 256 if (nvp->nvram_len < BRCMF_FW_NVRAM_DEVPATH_LEN + 6) 257 goto fail; 258 259 /* First search for the devpathX and see if it is the configuration 260 * for domain_nr/bus_nr. Search complete nvp 261 */ 262 snprintf(pci_path, sizeof(pci_path), "=pci/%d/%d", domain_nr, 263 bus_nr); 264 pci_len = strlen(pci_path); 265 snprintf(pcie_path, sizeof(pcie_path), "=pcie/%d/%d", domain_nr, 266 bus_nr); 267 pcie_len = strlen(pcie_path); 268 found = false; 269 i = 0; 270 while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) { 271 /* Format: devpathX=pcie/Y/Z/ 272 * Y = domain_nr, Z = bus_nr, X = virtual ID 273 */ 274 if (strncmp(&nvp->nvram[i], "devpath", 7) == 0 && 275 (!strncmp(&nvp->nvram[i + 8], pci_path, pci_len) || 276 !strncmp(&nvp->nvram[i + 8], pcie_path, pcie_len))) { 277 id = nvp->nvram[i + 7] - '0'; 278 found = true; 279 break; 280 } 281 while (nvp->nvram[i] != 0) 282 i++; 283 i++; 284 } 285 if (!found) 286 goto fail; 287 288 /* Now copy all valid entries, release old nvram and assign new one */ 289 i = 0; 290 j = 0; 291 while (i < nvp->nvram_len) { 292 if ((nvp->nvram[i] - '0' == id) && (nvp->nvram[i + 1] == ':')) { 293 i += 2; 294 if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0) 295 nvp->boardrev_found = true; 296 while (nvp->nvram[i] != 0) { 297 nvram[j] = nvp->nvram[i]; 298 i++; 299 j++; 300 } 301 nvram[j] = 0; 302 j++; 303 } 304 while (nvp->nvram[i] != 0) 305 i++; 306 i++; 307 } 308 kfree(nvp->nvram); 309 nvp->nvram = nvram; 310 nvp->nvram_len = j; 311 return; 312 313 fail: 314 kfree(nvram); 315 nvp->nvram_len = 0; 316 } 317 318 /* brcmf_fw_strip_multi_v2 :Some nvram files contain settings for multiple 319 * devices. Strip it down for one device, use domain_nr/bus_nr to determine 320 * which data is to be returned. v2 is the version where nvram is stored 321 * uncompressed, all relevant valid entries are identified by 322 * pcie/domain_nr/bus_nr: 323 */ 324 static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr, 325 u16 bus_nr) 326 { 327 char prefix[BRCMF_FW_NVRAM_PCIEDEV_LEN]; 328 size_t len; 329 u32 i, j; 330 u8 *nvram; 331 332 nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); 333 if (!nvram) 334 goto fail; 335 336 /* Copy all valid entries, release old nvram and assign new one. 337 * Valid entries are of type pcie/X/Y/ where X = domain_nr and 338 * Y = bus_nr. 339 */ 340 snprintf(prefix, sizeof(prefix), "pcie/%d/%d/", domain_nr, bus_nr); 341 len = strlen(prefix); 342 i = 0; 343 j = 0; 344 while (i < nvp->nvram_len - len) { 345 if (strncmp(&nvp->nvram[i], prefix, len) == 0) { 346 i += len; 347 if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0) 348 nvp->boardrev_found = true; 349 while (nvp->nvram[i] != 0) { 350 nvram[j] = nvp->nvram[i]; 351 i++; 352 j++; 353 } 354 nvram[j] = 0; 355 j++; 356 } 357 while (nvp->nvram[i] != 0) 358 i++; 359 i++; 360 } 361 kfree(nvp->nvram); 362 nvp->nvram = nvram; 363 nvp->nvram_len = j; 364 return; 365 fail: 366 kfree(nvram); 367 nvp->nvram_len = 0; 368 } 369 370 static void brcmf_fw_add_defaults(struct nvram_parser *nvp) 371 { 372 if (nvp->boardrev_found) 373 return; 374 375 memcpy(&nvp->nvram[nvp->nvram_len], &BRCMF_FW_DEFAULT_BOARDREV, 376 strlen(BRCMF_FW_DEFAULT_BOARDREV)); 377 nvp->nvram_len += strlen(BRCMF_FW_DEFAULT_BOARDREV); 378 nvp->nvram[nvp->nvram_len] = '\0'; 379 nvp->nvram_len++; 380 } 381 382 /* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a fil 383 * and ending in a NUL. Removes carriage returns, empty lines, comment lines, 384 * and converts newlines to NULs. Shortens buffer as needed and pads with NULs. 385 * End of buffer is completed with token identifying length of buffer. 386 */ 387 static void *brcmf_fw_nvram_strip(const u8 *data, size_t data_len, 388 u32 *new_length, u16 domain_nr, u16 bus_nr) 389 { 390 struct nvram_parser nvp; 391 u32 pad; 392 u32 token; 393 __le32 token_le; 394 395 if (brcmf_init_nvram_parser(&nvp, data, data_len) < 0) 396 return NULL; 397 398 while (nvp.pos < data_len) { 399 nvp.state = nv_parser_states[nvp.state](&nvp); 400 if (nvp.state == END) 401 break; 402 } 403 if (nvp.multi_dev_v1) { 404 nvp.boardrev_found = false; 405 brcmf_fw_strip_multi_v1(&nvp, domain_nr, bus_nr); 406 } else if (nvp.multi_dev_v2) { 407 nvp.boardrev_found = false; 408 brcmf_fw_strip_multi_v2(&nvp, domain_nr, bus_nr); 409 } 410 411 if (nvp.nvram_len == 0) { 412 kfree(nvp.nvram); 413 return NULL; 414 } 415 416 brcmf_fw_add_defaults(&nvp); 417 418 pad = nvp.nvram_len; 419 *new_length = roundup(nvp.nvram_len + 1, 4); 420 while (pad != *new_length) { 421 nvp.nvram[pad] = 0; 422 pad++; 423 } 424 425 token = *new_length / 4; 426 token = (~token << 16) | (token & 0x0000FFFF); 427 token_le = cpu_to_le32(token); 428 429 memcpy(&nvp.nvram[*new_length], &token_le, sizeof(token_le)); 430 *new_length += sizeof(token_le); 431 432 return nvp.nvram; 433 } 434 435 void brcmf_fw_nvram_free(void *nvram) 436 { 437 kfree(nvram); 438 } 439 440 struct brcmf_fw { 441 struct device *dev; 442 struct brcmf_fw_request *req; 443 u32 curpos; 444 void (*done)(struct device *dev, int err, struct brcmf_fw_request *req); 445 }; 446 447 static void brcmf_fw_request_done(const struct firmware *fw, void *ctx); 448 449 #ifdef CONFIG_EFI 450 /* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV" 451 * to specify "worldwide" compatible settings, but these 2 ccode-s do not work 452 * properly. "ccode=ALL" causes channels 12 and 13 to not be available, 453 * "ccode=XV" causes all 5GHz channels to not be available. So we replace both 454 * with "ccode=X2" which allows channels 12+13 and 5Ghz channels in 455 * no-Initiate-Radiation mode. This means that we will never send on these 456 * channels without first having received valid wifi traffic on the channel. 457 */ 458 static void brcmf_fw_fix_efi_nvram_ccode(char *data, unsigned long data_len) 459 { 460 char *ccode; 461 462 ccode = strnstr((char *)data, "ccode=ALL", data_len); 463 if (!ccode) 464 ccode = strnstr((char *)data, "ccode=XV\r", data_len); 465 if (!ccode) 466 return; 467 468 ccode[6] = 'X'; 469 ccode[7] = '2'; 470 ccode[8] = '\r'; 471 } 472 473 static u8 *brcmf_fw_nvram_from_efi(size_t *data_len_ret) 474 { 475 const u16 name[] = { 'n', 'v', 'r', 'a', 'm', 0 }; 476 struct efivar_entry *nvram_efivar; 477 unsigned long data_len = 0; 478 u8 *data = NULL; 479 int err; 480 481 nvram_efivar = kzalloc(sizeof(*nvram_efivar), GFP_KERNEL); 482 if (!nvram_efivar) 483 return NULL; 484 485 memcpy(&nvram_efivar->var.VariableName, name, sizeof(name)); 486 nvram_efivar->var.VendorGuid = EFI_GUID(0x74b00bd9, 0x805a, 0x4d61, 487 0xb5, 0x1f, 0x43, 0x26, 488 0x81, 0x23, 0xd1, 0x13); 489 490 err = efivar_entry_size(nvram_efivar, &data_len); 491 if (err) 492 goto fail; 493 494 data = kmalloc(data_len, GFP_KERNEL); 495 if (!data) 496 goto fail; 497 498 err = efivar_entry_get(nvram_efivar, NULL, &data_len, data); 499 if (err) 500 goto fail; 501 502 brcmf_fw_fix_efi_nvram_ccode(data, data_len); 503 brcmf_info("Using nvram EFI variable\n"); 504 505 kfree(nvram_efivar); 506 *data_len_ret = data_len; 507 return data; 508 509 fail: 510 kfree(data); 511 kfree(nvram_efivar); 512 return NULL; 513 } 514 #else 515 static inline u8 *brcmf_fw_nvram_from_efi(size_t *data_len) { return NULL; } 516 #endif 517 518 static void brcmf_fw_free_request(struct brcmf_fw_request *req) 519 { 520 struct brcmf_fw_item *item; 521 int i; 522 523 for (i = 0, item = &req->items[0]; i < req->n_items; i++, item++) { 524 if (item->type == BRCMF_FW_TYPE_BINARY) 525 release_firmware(item->binary); 526 else if (item->type == BRCMF_FW_TYPE_NVRAM) 527 brcmf_fw_nvram_free(item->nv_data.data); 528 } 529 kfree(req); 530 } 531 532 static int brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx) 533 { 534 struct brcmf_fw *fwctx = ctx; 535 struct brcmf_fw_item *cur; 536 bool free_bcm47xx_nvram = false; 537 bool kfree_nvram = false; 538 u32 nvram_length = 0; 539 void *nvram = NULL; 540 u8 *data = NULL; 541 size_t data_len; 542 543 brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev)); 544 545 cur = &fwctx->req->items[fwctx->curpos]; 546 547 if (fw && fw->data) { 548 data = (u8 *)fw->data; 549 data_len = fw->size; 550 } else { 551 if ((data = bcm47xx_nvram_get_contents(&data_len))) 552 free_bcm47xx_nvram = true; 553 else if ((data = brcmf_fw_nvram_from_efi(&data_len))) 554 kfree_nvram = true; 555 else if (!(cur->flags & BRCMF_FW_REQF_OPTIONAL)) 556 goto fail; 557 } 558 559 if (data) 560 nvram = brcmf_fw_nvram_strip(data, data_len, &nvram_length, 561 fwctx->req->domain_nr, 562 fwctx->req->bus_nr); 563 564 if (free_bcm47xx_nvram) 565 bcm47xx_nvram_release_contents(data); 566 if (kfree_nvram) 567 kfree(data); 568 569 release_firmware(fw); 570 if (!nvram && !(cur->flags & BRCMF_FW_REQF_OPTIONAL)) 571 goto fail; 572 573 brcmf_dbg(TRACE, "nvram %p len %d\n", nvram, nvram_length); 574 cur->nv_data.data = nvram; 575 cur->nv_data.len = nvram_length; 576 return 0; 577 578 fail: 579 return -ENOENT; 580 } 581 582 static int brcmf_fw_complete_request(const struct firmware *fw, 583 struct brcmf_fw *fwctx) 584 { 585 struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos]; 586 int ret = 0; 587 588 brcmf_dbg(TRACE, "firmware %s %sfound\n", cur->path, fw ? "" : "not "); 589 590 switch (cur->type) { 591 case BRCMF_FW_TYPE_NVRAM: 592 ret = brcmf_fw_request_nvram_done(fw, fwctx); 593 break; 594 case BRCMF_FW_TYPE_BINARY: 595 if (fw) 596 cur->binary = fw; 597 else 598 ret = -ENOENT; 599 break; 600 default: 601 /* something fishy here so bail out early */ 602 brcmf_err("unknown fw type: %d\n", cur->type); 603 release_firmware(fw); 604 ret = -EINVAL; 605 } 606 607 return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret; 608 } 609 610 static int brcmf_fw_request_firmware(const struct firmware **fw, 611 struct brcmf_fw *fwctx) 612 { 613 struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos]; 614 int ret; 615 616 /* nvram files are board-specific, first try a board-specific path */ 617 if (cur->type == BRCMF_FW_TYPE_NVRAM && fwctx->req->board_type) { 618 char alt_path[BRCMF_FW_NAME_LEN]; 619 620 strlcpy(alt_path, cur->path, BRCMF_FW_NAME_LEN); 621 /* strip .txt at the end */ 622 alt_path[strlen(alt_path) - 4] = 0; 623 strlcat(alt_path, ".", BRCMF_FW_NAME_LEN); 624 strlcat(alt_path, fwctx->req->board_type, BRCMF_FW_NAME_LEN); 625 strlcat(alt_path, ".txt", BRCMF_FW_NAME_LEN); 626 627 ret = request_firmware(fw, alt_path, fwctx->dev); 628 if (ret == 0) 629 return ret; 630 } 631 632 return request_firmware(fw, cur->path, fwctx->dev); 633 } 634 635 static void brcmf_fw_request_done(const struct firmware *fw, void *ctx) 636 { 637 struct brcmf_fw *fwctx = ctx; 638 int ret; 639 640 ret = brcmf_fw_complete_request(fw, fwctx); 641 642 while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) { 643 brcmf_fw_request_firmware(&fw, fwctx); 644 ret = brcmf_fw_complete_request(fw, ctx); 645 } 646 647 if (ret) { 648 brcmf_fw_free_request(fwctx->req); 649 fwctx->req = NULL; 650 } 651 fwctx->done(fwctx->dev, ret, fwctx->req); 652 kfree(fwctx); 653 } 654 655 static bool brcmf_fw_request_is_valid(struct brcmf_fw_request *req) 656 { 657 struct brcmf_fw_item *item; 658 int i; 659 660 if (!req->n_items) 661 return false; 662 663 for (i = 0, item = &req->items[0]; i < req->n_items; i++, item++) { 664 if (!item->path) 665 return false; 666 } 667 return true; 668 } 669 670 int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req, 671 void (*fw_cb)(struct device *dev, int err, 672 struct brcmf_fw_request *req)) 673 { 674 struct brcmf_fw_item *first = &req->items[0]; 675 struct brcmf_fw *fwctx; 676 int ret; 677 678 brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev)); 679 if (!fw_cb) 680 return -EINVAL; 681 682 if (!brcmf_fw_request_is_valid(req)) 683 return -EINVAL; 684 685 fwctx = kzalloc(sizeof(*fwctx), GFP_KERNEL); 686 if (!fwctx) 687 return -ENOMEM; 688 689 fwctx->dev = dev; 690 fwctx->req = req; 691 fwctx->done = fw_cb; 692 693 ret = request_firmware_nowait(THIS_MODULE, true, first->path, 694 fwctx->dev, GFP_KERNEL, fwctx, 695 brcmf_fw_request_done); 696 if (ret < 0) 697 brcmf_fw_request_done(NULL, fwctx); 698 699 return 0; 700 } 701 702 struct brcmf_fw_request * 703 brcmf_fw_alloc_request(u32 chip, u32 chiprev, 704 const struct brcmf_firmware_mapping mapping_table[], 705 u32 table_size, struct brcmf_fw_name *fwnames, 706 u32 n_fwnames) 707 { 708 struct brcmf_fw_request *fwreq; 709 char chipname[12]; 710 const char *mp_path; 711 size_t mp_path_len; 712 u32 i, j; 713 char end = '\0'; 714 715 for (i = 0; i < table_size; i++) { 716 if (mapping_table[i].chipid == chip && 717 mapping_table[i].revmask & BIT(chiprev)) 718 break; 719 } 720 721 brcmf_chip_name(chip, chiprev, chipname, sizeof(chipname)); 722 723 if (i == table_size) { 724 brcmf_err("Unknown chip %s\n", chipname); 725 return NULL; 726 } 727 728 fwreq = kzalloc(struct_size(fwreq, items, n_fwnames), GFP_KERNEL); 729 if (!fwreq) 730 return NULL; 731 732 brcmf_info("using %s for chip %s\n", 733 mapping_table[i].fw_base, chipname); 734 735 mp_path = brcmf_mp_global.firmware_path; 736 mp_path_len = strnlen(mp_path, BRCMF_FW_ALTPATH_LEN); 737 if (mp_path_len) 738 end = mp_path[mp_path_len - 1]; 739 740 fwreq->n_items = n_fwnames; 741 742 for (j = 0; j < n_fwnames; j++) { 743 fwreq->items[j].path = fwnames[j].path; 744 fwnames[j].path[0] = '\0'; 745 /* check if firmware path is provided by module parameter */ 746 if (brcmf_mp_global.firmware_path[0] != '\0') { 747 strlcpy(fwnames[j].path, mp_path, 748 BRCMF_FW_NAME_LEN); 749 750 if (end != '/') { 751 strlcat(fwnames[j].path, "/", 752 BRCMF_FW_NAME_LEN); 753 } 754 } 755 strlcat(fwnames[j].path, mapping_table[i].fw_base, 756 BRCMF_FW_NAME_LEN); 757 strlcat(fwnames[j].path, fwnames[j].extension, 758 BRCMF_FW_NAME_LEN); 759 fwreq->items[j].path = fwnames[j].path; 760 } 761 762 return fwreq; 763 } 764