105491d2cSKalle Valo /* 205491d2cSKalle Valo * Copyright (c) 2013 Broadcom Corporation 305491d2cSKalle Valo * 405491d2cSKalle Valo * Permission to use, copy, modify, and/or distribute this software for any 505491d2cSKalle Valo * purpose with or without fee is hereby granted, provided that the above 605491d2cSKalle Valo * copyright notice and this permission notice appear in all copies. 705491d2cSKalle Valo * 805491d2cSKalle Valo * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 905491d2cSKalle Valo * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 1005491d2cSKalle Valo * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 1105491d2cSKalle Valo * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 1205491d2cSKalle Valo * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 1305491d2cSKalle Valo * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 1405491d2cSKalle Valo * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 1505491d2cSKalle Valo */ 1605491d2cSKalle Valo 1705491d2cSKalle Valo #include <linux/kernel.h> 1805491d2cSKalle Valo #include <linux/slab.h> 1905491d2cSKalle Valo #include <linux/device.h> 2005491d2cSKalle Valo #include <linux/firmware.h> 2105491d2cSKalle Valo #include <linux/module.h> 2205491d2cSKalle Valo #include <linux/bcm47xx_nvram.h> 2305491d2cSKalle Valo 2405491d2cSKalle Valo #include "debug.h" 2505491d2cSKalle Valo #include "firmware.h" 2605491d2cSKalle Valo 2705491d2cSKalle Valo #define BRCMF_FW_MAX_NVRAM_SIZE 64000 2805491d2cSKalle Valo #define BRCMF_FW_NVRAM_DEVPATH_LEN 19 /* devpath0=pcie/1/4/ */ 2905491d2cSKalle Valo #define BRCMF_FW_NVRAM_PCIEDEV_LEN 10 /* pcie/1/4/ + \0 */ 3005491d2cSKalle Valo 3105491d2cSKalle Valo char brcmf_firmware_path[BRCMF_FW_PATH_LEN]; 3205491d2cSKalle Valo module_param_string(alternative_fw_path, brcmf_firmware_path, 3305491d2cSKalle Valo BRCMF_FW_PATH_LEN, 0440); 3405491d2cSKalle Valo 3505491d2cSKalle Valo enum nvram_parser_state { 3605491d2cSKalle Valo IDLE, 3705491d2cSKalle Valo KEY, 3805491d2cSKalle Valo VALUE, 3905491d2cSKalle Valo COMMENT, 4005491d2cSKalle Valo END 4105491d2cSKalle Valo }; 4205491d2cSKalle Valo 4305491d2cSKalle Valo /** 4405491d2cSKalle Valo * struct nvram_parser - internal info for parser. 4505491d2cSKalle Valo * 4605491d2cSKalle Valo * @state: current parser state. 4705491d2cSKalle Valo * @data: input buffer being parsed. 4805491d2cSKalle Valo * @nvram: output buffer with parse result. 4905491d2cSKalle Valo * @nvram_len: lenght of parse result. 5005491d2cSKalle Valo * @line: current line. 5105491d2cSKalle Valo * @column: current column in line. 5205491d2cSKalle Valo * @pos: byte offset in input buffer. 5305491d2cSKalle Valo * @entry: start position of key,value entry. 5405491d2cSKalle Valo * @multi_dev_v1: detect pcie multi device v1 (compressed). 5505491d2cSKalle Valo * @multi_dev_v2: detect pcie multi device v2. 5605491d2cSKalle Valo */ 5705491d2cSKalle Valo struct nvram_parser { 5805491d2cSKalle Valo enum nvram_parser_state state; 5905491d2cSKalle Valo const u8 *data; 6005491d2cSKalle Valo u8 *nvram; 6105491d2cSKalle Valo u32 nvram_len; 6205491d2cSKalle Valo u32 line; 6305491d2cSKalle Valo u32 column; 6405491d2cSKalle Valo u32 pos; 6505491d2cSKalle Valo u32 entry; 6605491d2cSKalle Valo bool multi_dev_v1; 6705491d2cSKalle Valo bool multi_dev_v2; 6805491d2cSKalle Valo }; 6905491d2cSKalle Valo 7005491d2cSKalle Valo /** 7105491d2cSKalle Valo * is_nvram_char() - check if char is a valid one for NVRAM entry 7205491d2cSKalle Valo * 7305491d2cSKalle Valo * It accepts all printable ASCII chars except for '#' which opens a comment. 7405491d2cSKalle Valo * Please note that ' ' (space) while accepted is not a valid key name char. 7505491d2cSKalle Valo */ 7605491d2cSKalle Valo static bool is_nvram_char(char c) 7705491d2cSKalle Valo { 7805491d2cSKalle Valo /* comment marker excluded */ 7905491d2cSKalle Valo if (c == '#') 8005491d2cSKalle Valo return false; 8105491d2cSKalle Valo 8205491d2cSKalle Valo /* key and value may have any other readable character */ 8305491d2cSKalle Valo return (c >= 0x20 && c < 0x7f); 8405491d2cSKalle Valo } 8505491d2cSKalle Valo 8605491d2cSKalle Valo static bool is_whitespace(char c) 8705491d2cSKalle Valo { 8805491d2cSKalle Valo return (c == ' ' || c == '\r' || c == '\n' || c == '\t'); 8905491d2cSKalle Valo } 9005491d2cSKalle Valo 9105491d2cSKalle Valo static enum nvram_parser_state brcmf_nvram_handle_idle(struct nvram_parser *nvp) 9205491d2cSKalle Valo { 9305491d2cSKalle Valo char c; 9405491d2cSKalle Valo 9505491d2cSKalle Valo c = nvp->data[nvp->pos]; 9605491d2cSKalle Valo if (c == '\n') 9705491d2cSKalle Valo return COMMENT; 9805491d2cSKalle Valo if (is_whitespace(c)) 9905491d2cSKalle Valo goto proceed; 10005491d2cSKalle Valo if (c == '#') 10105491d2cSKalle Valo return COMMENT; 10205491d2cSKalle Valo if (is_nvram_char(c)) { 10305491d2cSKalle Valo nvp->entry = nvp->pos; 10405491d2cSKalle Valo return KEY; 10505491d2cSKalle Valo } 10605491d2cSKalle Valo brcmf_dbg(INFO, "warning: ln=%d:col=%d: ignoring invalid character\n", 10705491d2cSKalle Valo nvp->line, nvp->column); 10805491d2cSKalle Valo proceed: 10905491d2cSKalle Valo nvp->column++; 11005491d2cSKalle Valo nvp->pos++; 11105491d2cSKalle Valo return IDLE; 11205491d2cSKalle Valo } 11305491d2cSKalle Valo 11405491d2cSKalle Valo static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp) 11505491d2cSKalle Valo { 11605491d2cSKalle Valo enum nvram_parser_state st = nvp->state; 11705491d2cSKalle Valo char c; 11805491d2cSKalle Valo 11905491d2cSKalle Valo c = nvp->data[nvp->pos]; 12005491d2cSKalle Valo if (c == '=') { 12105491d2cSKalle Valo /* ignore RAW1 by treating as comment */ 12205491d2cSKalle Valo if (strncmp(&nvp->data[nvp->entry], "RAW1", 4) == 0) 12305491d2cSKalle Valo st = COMMENT; 12405491d2cSKalle Valo else 12505491d2cSKalle Valo st = VALUE; 12605491d2cSKalle Valo if (strncmp(&nvp->data[nvp->entry], "devpath", 7) == 0) 12705491d2cSKalle Valo nvp->multi_dev_v1 = true; 12805491d2cSKalle Valo if (strncmp(&nvp->data[nvp->entry], "pcie/", 5) == 0) 12905491d2cSKalle Valo nvp->multi_dev_v2 = true; 13005491d2cSKalle Valo } else if (!is_nvram_char(c) || c == ' ') { 13105491d2cSKalle Valo brcmf_dbg(INFO, "warning: ln=%d:col=%d: '=' expected, skip invalid key entry\n", 13205491d2cSKalle Valo nvp->line, nvp->column); 13305491d2cSKalle Valo return COMMENT; 13405491d2cSKalle Valo } 13505491d2cSKalle Valo 13605491d2cSKalle Valo nvp->column++; 13705491d2cSKalle Valo nvp->pos++; 13805491d2cSKalle Valo return st; 13905491d2cSKalle Valo } 14005491d2cSKalle Valo 14105491d2cSKalle Valo static enum nvram_parser_state 14205491d2cSKalle Valo brcmf_nvram_handle_value(struct nvram_parser *nvp) 14305491d2cSKalle Valo { 14405491d2cSKalle Valo char c; 14505491d2cSKalle Valo char *skv; 14605491d2cSKalle Valo char *ekv; 14705491d2cSKalle Valo u32 cplen; 14805491d2cSKalle Valo 14905491d2cSKalle Valo c = nvp->data[nvp->pos]; 15005491d2cSKalle Valo if (!is_nvram_char(c)) { 15105491d2cSKalle Valo /* key,value pair complete */ 15205491d2cSKalle Valo ekv = (u8 *)&nvp->data[nvp->pos]; 15305491d2cSKalle Valo skv = (u8 *)&nvp->data[nvp->entry]; 15405491d2cSKalle Valo cplen = ekv - skv; 15505491d2cSKalle Valo if (nvp->nvram_len + cplen + 1 >= BRCMF_FW_MAX_NVRAM_SIZE) 15605491d2cSKalle Valo return END; 15705491d2cSKalle Valo /* copy to output buffer */ 15805491d2cSKalle Valo memcpy(&nvp->nvram[nvp->nvram_len], skv, cplen); 15905491d2cSKalle Valo nvp->nvram_len += cplen; 16005491d2cSKalle Valo nvp->nvram[nvp->nvram_len] = '\0'; 16105491d2cSKalle Valo nvp->nvram_len++; 16205491d2cSKalle Valo return IDLE; 16305491d2cSKalle Valo } 16405491d2cSKalle Valo nvp->pos++; 16505491d2cSKalle Valo nvp->column++; 16605491d2cSKalle Valo return VALUE; 16705491d2cSKalle Valo } 16805491d2cSKalle Valo 16905491d2cSKalle Valo static enum nvram_parser_state 17005491d2cSKalle Valo brcmf_nvram_handle_comment(struct nvram_parser *nvp) 17105491d2cSKalle Valo { 17205491d2cSKalle Valo char *eoc, *sol; 17305491d2cSKalle Valo 17405491d2cSKalle Valo sol = (char *)&nvp->data[nvp->pos]; 17505491d2cSKalle Valo eoc = strchr(sol, '\n'); 17605491d2cSKalle Valo if (!eoc) { 17705491d2cSKalle Valo eoc = strchr(sol, '\0'); 17805491d2cSKalle Valo if (!eoc) 17905491d2cSKalle Valo return END; 18005491d2cSKalle Valo } 18105491d2cSKalle Valo 18205491d2cSKalle Valo /* eat all moving to next line */ 18305491d2cSKalle Valo nvp->line++; 18405491d2cSKalle Valo nvp->column = 1; 18505491d2cSKalle Valo nvp->pos += (eoc - sol) + 1; 18605491d2cSKalle Valo return IDLE; 18705491d2cSKalle Valo } 18805491d2cSKalle Valo 18905491d2cSKalle Valo static enum nvram_parser_state brcmf_nvram_handle_end(struct nvram_parser *nvp) 19005491d2cSKalle Valo { 19105491d2cSKalle Valo /* final state */ 19205491d2cSKalle Valo return END; 19305491d2cSKalle Valo } 19405491d2cSKalle Valo 19505491d2cSKalle Valo static enum nvram_parser_state 19605491d2cSKalle Valo (*nv_parser_states[])(struct nvram_parser *nvp) = { 19705491d2cSKalle Valo brcmf_nvram_handle_idle, 19805491d2cSKalle Valo brcmf_nvram_handle_key, 19905491d2cSKalle Valo brcmf_nvram_handle_value, 20005491d2cSKalle Valo brcmf_nvram_handle_comment, 20105491d2cSKalle Valo brcmf_nvram_handle_end 20205491d2cSKalle Valo }; 20305491d2cSKalle Valo 20405491d2cSKalle Valo static int brcmf_init_nvram_parser(struct nvram_parser *nvp, 20505491d2cSKalle Valo const u8 *data, size_t data_len) 20605491d2cSKalle Valo { 20705491d2cSKalle Valo size_t size; 20805491d2cSKalle Valo 20905491d2cSKalle Valo memset(nvp, 0, sizeof(*nvp)); 21005491d2cSKalle Valo nvp->data = data; 21105491d2cSKalle Valo /* Limit size to MAX_NVRAM_SIZE, some files contain lot of comment */ 21205491d2cSKalle Valo if (data_len > BRCMF_FW_MAX_NVRAM_SIZE) 21305491d2cSKalle Valo size = BRCMF_FW_MAX_NVRAM_SIZE; 21405491d2cSKalle Valo else 21505491d2cSKalle Valo size = data_len; 21605491d2cSKalle Valo /* Alloc for extra 0 byte + roundup by 4 + length field */ 21705491d2cSKalle Valo size += 1 + 3 + sizeof(u32); 21805491d2cSKalle Valo nvp->nvram = kzalloc(size, GFP_KERNEL); 21905491d2cSKalle Valo if (!nvp->nvram) 22005491d2cSKalle Valo return -ENOMEM; 22105491d2cSKalle Valo 22205491d2cSKalle Valo nvp->line = 1; 22305491d2cSKalle Valo nvp->column = 1; 22405491d2cSKalle Valo return 0; 22505491d2cSKalle Valo } 22605491d2cSKalle Valo 22705491d2cSKalle Valo /* brcmf_fw_strip_multi_v1 :Some nvram files contain settings for multiple 22805491d2cSKalle Valo * devices. Strip it down for one device, use domain_nr/bus_nr to determine 22905491d2cSKalle Valo * which data is to be returned. v1 is the version where nvram is stored 23005491d2cSKalle Valo * compressed and "devpath" maps to index for valid entries. 23105491d2cSKalle Valo */ 23205491d2cSKalle Valo static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr, 23305491d2cSKalle Valo u16 bus_nr) 23405491d2cSKalle Valo { 23505491d2cSKalle Valo /* Device path with a leading '=' key-value separator */ 23605491d2cSKalle Valo char pci_path[] = "=pci/?/?"; 23705491d2cSKalle Valo size_t pci_len; 23805491d2cSKalle Valo char pcie_path[] = "=pcie/?/?"; 23905491d2cSKalle Valo size_t pcie_len; 24005491d2cSKalle Valo 24105491d2cSKalle Valo u32 i, j; 24205491d2cSKalle Valo bool found; 24305491d2cSKalle Valo u8 *nvram; 24405491d2cSKalle Valo u8 id; 24505491d2cSKalle Valo 24605491d2cSKalle Valo nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); 24705491d2cSKalle Valo if (!nvram) 24805491d2cSKalle Valo goto fail; 24905491d2cSKalle Valo 25005491d2cSKalle Valo /* min length: devpath0=pcie/1/4/ + 0:x=y */ 25105491d2cSKalle Valo if (nvp->nvram_len < BRCMF_FW_NVRAM_DEVPATH_LEN + 6) 25205491d2cSKalle Valo goto fail; 25305491d2cSKalle Valo 25405491d2cSKalle Valo /* First search for the devpathX and see if it is the configuration 25505491d2cSKalle Valo * for domain_nr/bus_nr. Search complete nvp 25605491d2cSKalle Valo */ 25705491d2cSKalle Valo snprintf(pci_path, sizeof(pci_path), "=pci/%d/%d", domain_nr, 25805491d2cSKalle Valo bus_nr); 25905491d2cSKalle Valo pci_len = strlen(pci_path); 26005491d2cSKalle Valo snprintf(pcie_path, sizeof(pcie_path), "=pcie/%d/%d", domain_nr, 26105491d2cSKalle Valo bus_nr); 26205491d2cSKalle Valo pcie_len = strlen(pcie_path); 26305491d2cSKalle Valo found = false; 26405491d2cSKalle Valo i = 0; 26505491d2cSKalle Valo while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) { 26605491d2cSKalle Valo /* Format: devpathX=pcie/Y/Z/ 26705491d2cSKalle Valo * Y = domain_nr, Z = bus_nr, X = virtual ID 26805491d2cSKalle Valo */ 26905491d2cSKalle Valo if (strncmp(&nvp->nvram[i], "devpath", 7) == 0 && 27005491d2cSKalle Valo (!strncmp(&nvp->nvram[i + 8], pci_path, pci_len) || 27105491d2cSKalle Valo !strncmp(&nvp->nvram[i + 8], pcie_path, pcie_len))) { 27205491d2cSKalle Valo id = nvp->nvram[i + 7] - '0'; 27305491d2cSKalle Valo found = true; 27405491d2cSKalle Valo break; 27505491d2cSKalle Valo } 27605491d2cSKalle Valo while (nvp->nvram[i] != 0) 27705491d2cSKalle Valo i++; 27805491d2cSKalle Valo i++; 27905491d2cSKalle Valo } 28005491d2cSKalle Valo if (!found) 28105491d2cSKalle Valo goto fail; 28205491d2cSKalle Valo 28305491d2cSKalle Valo /* Now copy all valid entries, release old nvram and assign new one */ 28405491d2cSKalle Valo i = 0; 28505491d2cSKalle Valo j = 0; 28605491d2cSKalle Valo while (i < nvp->nvram_len) { 28705491d2cSKalle Valo if ((nvp->nvram[i] - '0' == id) && (nvp->nvram[i + 1] == ':')) { 28805491d2cSKalle Valo i += 2; 28905491d2cSKalle Valo while (nvp->nvram[i] != 0) { 29005491d2cSKalle Valo nvram[j] = nvp->nvram[i]; 29105491d2cSKalle Valo i++; 29205491d2cSKalle Valo j++; 29305491d2cSKalle Valo } 29405491d2cSKalle Valo nvram[j] = 0; 29505491d2cSKalle Valo j++; 29605491d2cSKalle Valo } 29705491d2cSKalle Valo while (nvp->nvram[i] != 0) 29805491d2cSKalle Valo i++; 29905491d2cSKalle Valo i++; 30005491d2cSKalle Valo } 30105491d2cSKalle Valo kfree(nvp->nvram); 30205491d2cSKalle Valo nvp->nvram = nvram; 30305491d2cSKalle Valo nvp->nvram_len = j; 30405491d2cSKalle Valo return; 30505491d2cSKalle Valo 30605491d2cSKalle Valo fail: 30705491d2cSKalle Valo kfree(nvram); 30805491d2cSKalle Valo nvp->nvram_len = 0; 30905491d2cSKalle Valo } 31005491d2cSKalle Valo 31105491d2cSKalle Valo /* brcmf_fw_strip_multi_v2 :Some nvram files contain settings for multiple 31205491d2cSKalle Valo * devices. Strip it down for one device, use domain_nr/bus_nr to determine 31305491d2cSKalle Valo * which data is to be returned. v2 is the version where nvram is stored 31405491d2cSKalle Valo * uncompressed, all relevant valid entries are identified by 31505491d2cSKalle Valo * pcie/domain_nr/bus_nr: 31605491d2cSKalle Valo */ 31705491d2cSKalle Valo static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr, 31805491d2cSKalle Valo u16 bus_nr) 31905491d2cSKalle Valo { 32005491d2cSKalle Valo char prefix[BRCMF_FW_NVRAM_PCIEDEV_LEN]; 32105491d2cSKalle Valo size_t len; 32205491d2cSKalle Valo u32 i, j; 32305491d2cSKalle Valo u8 *nvram; 32405491d2cSKalle Valo 32505491d2cSKalle Valo nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); 32605491d2cSKalle Valo if (!nvram) 32705491d2cSKalle Valo goto fail; 32805491d2cSKalle Valo 32905491d2cSKalle Valo /* Copy all valid entries, release old nvram and assign new one. 33005491d2cSKalle Valo * Valid entries are of type pcie/X/Y/ where X = domain_nr and 33105491d2cSKalle Valo * Y = bus_nr. 33205491d2cSKalle Valo */ 33305491d2cSKalle Valo snprintf(prefix, sizeof(prefix), "pcie/%d/%d/", domain_nr, bus_nr); 33405491d2cSKalle Valo len = strlen(prefix); 33505491d2cSKalle Valo i = 0; 33605491d2cSKalle Valo j = 0; 33705491d2cSKalle Valo while (i < nvp->nvram_len - len) { 33805491d2cSKalle Valo if (strncmp(&nvp->nvram[i], prefix, len) == 0) { 33905491d2cSKalle Valo i += len; 34005491d2cSKalle Valo while (nvp->nvram[i] != 0) { 34105491d2cSKalle Valo nvram[j] = nvp->nvram[i]; 34205491d2cSKalle Valo i++; 34305491d2cSKalle Valo j++; 34405491d2cSKalle Valo } 34505491d2cSKalle Valo nvram[j] = 0; 34605491d2cSKalle Valo j++; 34705491d2cSKalle Valo } 34805491d2cSKalle Valo while (nvp->nvram[i] != 0) 34905491d2cSKalle Valo i++; 35005491d2cSKalle Valo i++; 35105491d2cSKalle Valo } 35205491d2cSKalle Valo kfree(nvp->nvram); 35305491d2cSKalle Valo nvp->nvram = nvram; 35405491d2cSKalle Valo nvp->nvram_len = j; 35505491d2cSKalle Valo return; 35605491d2cSKalle Valo fail: 35705491d2cSKalle Valo kfree(nvram); 35805491d2cSKalle Valo nvp->nvram_len = 0; 35905491d2cSKalle Valo } 36005491d2cSKalle Valo 36105491d2cSKalle Valo /* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a fil 36205491d2cSKalle Valo * and ending in a NUL. Removes carriage returns, empty lines, comment lines, 36305491d2cSKalle Valo * and converts newlines to NULs. Shortens buffer as needed and pads with NULs. 36405491d2cSKalle Valo * End of buffer is completed with token identifying length of buffer. 36505491d2cSKalle Valo */ 36605491d2cSKalle Valo static void *brcmf_fw_nvram_strip(const u8 *data, size_t data_len, 36705491d2cSKalle Valo u32 *new_length, u16 domain_nr, u16 bus_nr) 36805491d2cSKalle Valo { 36905491d2cSKalle Valo struct nvram_parser nvp; 37005491d2cSKalle Valo u32 pad; 37105491d2cSKalle Valo u32 token; 37205491d2cSKalle Valo __le32 token_le; 37305491d2cSKalle Valo 37405491d2cSKalle Valo if (brcmf_init_nvram_parser(&nvp, data, data_len) < 0) 37505491d2cSKalle Valo return NULL; 37605491d2cSKalle Valo 37705491d2cSKalle Valo while (nvp.pos < data_len) { 37805491d2cSKalle Valo nvp.state = nv_parser_states[nvp.state](&nvp); 37905491d2cSKalle Valo if (nvp.state == END) 38005491d2cSKalle Valo break; 38105491d2cSKalle Valo } 38205491d2cSKalle Valo if (nvp.multi_dev_v1) 38305491d2cSKalle Valo brcmf_fw_strip_multi_v1(&nvp, domain_nr, bus_nr); 38405491d2cSKalle Valo else if (nvp.multi_dev_v2) 38505491d2cSKalle Valo brcmf_fw_strip_multi_v2(&nvp, domain_nr, bus_nr); 38605491d2cSKalle Valo 38705491d2cSKalle Valo if (nvp.nvram_len == 0) { 38805491d2cSKalle Valo kfree(nvp.nvram); 38905491d2cSKalle Valo return NULL; 39005491d2cSKalle Valo } 39105491d2cSKalle Valo 39205491d2cSKalle Valo pad = nvp.nvram_len; 39305491d2cSKalle Valo *new_length = roundup(nvp.nvram_len + 1, 4); 39405491d2cSKalle Valo while (pad != *new_length) { 39505491d2cSKalle Valo nvp.nvram[pad] = 0; 39605491d2cSKalle Valo pad++; 39705491d2cSKalle Valo } 39805491d2cSKalle Valo 39905491d2cSKalle Valo token = *new_length / 4; 40005491d2cSKalle Valo token = (~token << 16) | (token & 0x0000FFFF); 40105491d2cSKalle Valo token_le = cpu_to_le32(token); 40205491d2cSKalle Valo 40305491d2cSKalle Valo memcpy(&nvp.nvram[*new_length], &token_le, sizeof(token_le)); 40405491d2cSKalle Valo *new_length += sizeof(token_le); 40505491d2cSKalle Valo 40605491d2cSKalle Valo return nvp.nvram; 40705491d2cSKalle Valo } 40805491d2cSKalle Valo 40905491d2cSKalle Valo void brcmf_fw_nvram_free(void *nvram) 41005491d2cSKalle Valo { 41105491d2cSKalle Valo kfree(nvram); 41205491d2cSKalle Valo } 41305491d2cSKalle Valo 41405491d2cSKalle Valo struct brcmf_fw { 41505491d2cSKalle Valo struct device *dev; 41605491d2cSKalle Valo u16 flags; 41705491d2cSKalle Valo const struct firmware *code; 41805491d2cSKalle Valo const char *nvram_name; 41905491d2cSKalle Valo u16 domain_nr; 42005491d2cSKalle Valo u16 bus_nr; 42105491d2cSKalle Valo void (*done)(struct device *dev, const struct firmware *fw, 42205491d2cSKalle Valo void *nvram_image, u32 nvram_len); 42305491d2cSKalle Valo }; 42405491d2cSKalle Valo 42505491d2cSKalle Valo static void brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx) 42605491d2cSKalle Valo { 42705491d2cSKalle Valo struct brcmf_fw *fwctx = ctx; 42805491d2cSKalle Valo u32 nvram_length = 0; 42905491d2cSKalle Valo void *nvram = NULL; 43005491d2cSKalle Valo u8 *data = NULL; 43105491d2cSKalle Valo size_t data_len; 43205491d2cSKalle Valo bool raw_nvram; 43305491d2cSKalle Valo 43405491d2cSKalle Valo brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev)); 43505491d2cSKalle Valo if (fw && fw->data) { 43605491d2cSKalle Valo data = (u8 *)fw->data; 43705491d2cSKalle Valo data_len = fw->size; 43805491d2cSKalle Valo raw_nvram = false; 43905491d2cSKalle Valo } else { 44005491d2cSKalle Valo data = bcm47xx_nvram_get_contents(&data_len); 44105491d2cSKalle Valo if (!data && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL)) 44205491d2cSKalle Valo goto fail; 44305491d2cSKalle Valo raw_nvram = true; 44405491d2cSKalle Valo } 44505491d2cSKalle Valo 44605491d2cSKalle Valo if (data) 44705491d2cSKalle Valo nvram = brcmf_fw_nvram_strip(data, data_len, &nvram_length, 44805491d2cSKalle Valo fwctx->domain_nr, fwctx->bus_nr); 44905491d2cSKalle Valo 45005491d2cSKalle Valo if (raw_nvram) 45105491d2cSKalle Valo bcm47xx_nvram_release_contents(data); 45205491d2cSKalle Valo if (fw) 45305491d2cSKalle Valo release_firmware(fw); 45405491d2cSKalle Valo if (!nvram && !(fwctx->flags & BRCMF_FW_REQ_NV_OPTIONAL)) 45505491d2cSKalle Valo goto fail; 45605491d2cSKalle Valo 45705491d2cSKalle Valo fwctx->done(fwctx->dev, fwctx->code, nvram, nvram_length); 45805491d2cSKalle Valo kfree(fwctx); 45905491d2cSKalle Valo return; 46005491d2cSKalle Valo 46105491d2cSKalle Valo fail: 46205491d2cSKalle Valo brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev)); 46305491d2cSKalle Valo release_firmware(fwctx->code); 46405491d2cSKalle Valo device_release_driver(fwctx->dev); 46505491d2cSKalle Valo kfree(fwctx); 46605491d2cSKalle Valo } 46705491d2cSKalle Valo 46805491d2cSKalle Valo static void brcmf_fw_request_code_done(const struct firmware *fw, void *ctx) 46905491d2cSKalle Valo { 47005491d2cSKalle Valo struct brcmf_fw *fwctx = ctx; 47105491d2cSKalle Valo int ret; 47205491d2cSKalle Valo 47305491d2cSKalle Valo brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev)); 47405491d2cSKalle Valo if (!fw) 47505491d2cSKalle Valo goto fail; 47605491d2cSKalle Valo 47705491d2cSKalle Valo /* only requested code so done here */ 47805491d2cSKalle Valo if (!(fwctx->flags & BRCMF_FW_REQUEST_NVRAM)) { 47905491d2cSKalle Valo fwctx->done(fwctx->dev, fw, NULL, 0); 48005491d2cSKalle Valo kfree(fwctx); 48105491d2cSKalle Valo return; 48205491d2cSKalle Valo } 48305491d2cSKalle Valo fwctx->code = fw; 48405491d2cSKalle Valo ret = request_firmware_nowait(THIS_MODULE, true, fwctx->nvram_name, 48505491d2cSKalle Valo fwctx->dev, GFP_KERNEL, fwctx, 48605491d2cSKalle Valo brcmf_fw_request_nvram_done); 48705491d2cSKalle Valo 48805491d2cSKalle Valo if (!ret) 48905491d2cSKalle Valo return; 49005491d2cSKalle Valo 49105491d2cSKalle Valo brcmf_fw_request_nvram_done(NULL, fwctx); 49205491d2cSKalle Valo return; 49305491d2cSKalle Valo 49405491d2cSKalle Valo fail: 49505491d2cSKalle Valo brcmf_dbg(TRACE, "failed: dev=%s\n", dev_name(fwctx->dev)); 49605491d2cSKalle Valo device_release_driver(fwctx->dev); 49705491d2cSKalle Valo kfree(fwctx); 49805491d2cSKalle Valo } 49905491d2cSKalle Valo 50005491d2cSKalle Valo int brcmf_fw_get_firmwares_pcie(struct device *dev, u16 flags, 50105491d2cSKalle Valo const char *code, const char *nvram, 50205491d2cSKalle Valo void (*fw_cb)(struct device *dev, 50305491d2cSKalle Valo const struct firmware *fw, 50405491d2cSKalle Valo void *nvram_image, u32 nvram_len), 50505491d2cSKalle Valo u16 domain_nr, u16 bus_nr) 50605491d2cSKalle Valo { 50705491d2cSKalle Valo struct brcmf_fw *fwctx; 50805491d2cSKalle Valo 50905491d2cSKalle Valo brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev)); 51005491d2cSKalle Valo if (!fw_cb || !code) 51105491d2cSKalle Valo return -EINVAL; 51205491d2cSKalle Valo 51305491d2cSKalle Valo if ((flags & BRCMF_FW_REQUEST_NVRAM) && !nvram) 51405491d2cSKalle Valo return -EINVAL; 51505491d2cSKalle Valo 51605491d2cSKalle Valo fwctx = kzalloc(sizeof(*fwctx), GFP_KERNEL); 51705491d2cSKalle Valo if (!fwctx) 51805491d2cSKalle Valo return -ENOMEM; 51905491d2cSKalle Valo 52005491d2cSKalle Valo fwctx->dev = dev; 52105491d2cSKalle Valo fwctx->flags = flags; 52205491d2cSKalle Valo fwctx->done = fw_cb; 52305491d2cSKalle Valo if (flags & BRCMF_FW_REQUEST_NVRAM) 52405491d2cSKalle Valo fwctx->nvram_name = nvram; 52505491d2cSKalle Valo fwctx->domain_nr = domain_nr; 52605491d2cSKalle Valo fwctx->bus_nr = bus_nr; 52705491d2cSKalle Valo 52805491d2cSKalle Valo return request_firmware_nowait(THIS_MODULE, true, code, dev, 52905491d2cSKalle Valo GFP_KERNEL, fwctx, 53005491d2cSKalle Valo brcmf_fw_request_code_done); 53105491d2cSKalle Valo } 53205491d2cSKalle Valo 53305491d2cSKalle Valo int brcmf_fw_get_firmwares(struct device *dev, u16 flags, 53405491d2cSKalle Valo const char *code, const char *nvram, 53505491d2cSKalle Valo void (*fw_cb)(struct device *dev, 53605491d2cSKalle Valo const struct firmware *fw, 53705491d2cSKalle Valo void *nvram_image, u32 nvram_len)) 53805491d2cSKalle Valo { 53905491d2cSKalle Valo return brcmf_fw_get_firmwares_pcie(dev, flags, code, nvram, fw_cb, 0, 54005491d2cSKalle Valo 0); 54105491d2cSKalle Valo } 54205491d2cSKalle Valo 543