// SPDX-License-Identifier: ISC /* * Copyright (c) 2013 Broadcom Corporation */ #include <linux/efi.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/device.h> #include <linux/firmware.h> #include <linux/module.h> #include <linux/bcm47xx_nvram.h> #include "debug.h" #include "firmware.h" #include "core.h" #include "common.h" #include "chip.h" #define BRCMF_FW_MAX_NVRAM_SIZE … #define BRCMF_FW_NVRAM_DEVPATH_LEN … #define BRCMF_FW_NVRAM_PCIEDEV_LEN … #define BRCMF_FW_DEFAULT_BOARDREV … #define BRCMF_FW_MACADDR_FMT … #define BRCMF_FW_MACADDR_LEN … enum nvram_parser_state { … }; /** * struct nvram_parser - internal info for parser. * * @state: current parser state. * @data: input buffer being parsed. * @nvram: output buffer with parse result. * @nvram_len: length of parse result. * @line: current line. * @column: current column in line. * @pos: byte offset in input buffer. * @entry: start position of key,value entry. * @multi_dev_v1: detect pcie multi device v1 (compressed). * @multi_dev_v2: detect pcie multi device v2. * @boardrev_found: nvram contains boardrev information. * @strip_mac: strip the MAC address. */ struct nvram_parser { … }; /* * is_nvram_char() - check if char is a valid one for NVRAM entry * * It accepts all printable ASCII chars except for '#' which opens a comment. * Please note that ' ' (space) while accepted is not a valid key name char. */ static bool is_nvram_char(char c) { … } static bool is_whitespace(char c) { … } static enum nvram_parser_state brcmf_nvram_handle_idle(struct nvram_parser *nvp) { … } static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp) { … } static enum nvram_parser_state brcmf_nvram_handle_value(struct nvram_parser *nvp) { … } static enum nvram_parser_state brcmf_nvram_handle_comment(struct nvram_parser *nvp) { … } static enum nvram_parser_state brcmf_nvram_handle_end(struct nvram_parser *nvp) { … } static enum nvram_parser_state (*nv_parser_states[])(struct nvram_parser *nvp) = …; static int brcmf_init_nvram_parser(struct nvram_parser *nvp, const u8 *data, size_t data_len) { … } /* brcmf_fw_strip_multi_v1 :Some nvram files contain settings for multiple * devices. Strip it down for one device, use domain_nr/bus_nr to determine * which data is to be returned. v1 is the version where nvram is stored * compressed and "devpath" maps to index for valid entries. */ static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr, u16 bus_nr) { … } /* brcmf_fw_strip_multi_v2 :Some nvram files contain settings for multiple * devices. Strip it down for one device, use domain_nr/bus_nr to determine * which data is to be returned. v2 is the version where nvram is stored * uncompressed, all relevant valid entries are identified by * pcie/domain_nr/bus_nr: */ static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr, u16 bus_nr) { … } static void brcmf_fw_add_defaults(struct nvram_parser *nvp) { … } static void brcmf_fw_add_macaddr(struct nvram_parser *nvp, u8 *mac) { … } /* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a fil * and ending in a NUL. Removes carriage returns, empty lines, comment lines, * and converts newlines to NULs. Shortens buffer as needed and pads with NULs. * End of buffer is completed with token identifying length of buffer. */ static void *brcmf_fw_nvram_strip(const u8 *data, size_t data_len, u32 *new_length, u16 domain_nr, u16 bus_nr, struct device *dev) { … } void brcmf_fw_nvram_free(void *nvram) { … } struct brcmf_fw { … }; #ifdef CONFIG_EFI /* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV" * to specify "worldwide" compatible settings, but these 2 ccode-s do not work * properly. "ccode=ALL" causes channels 12 and 13 to not be available, * "ccode=XV" causes all 5GHz channels to not be available. So we replace both * with "ccode=X2" which allows channels 12+13 and 5Ghz channels in * no-Initiate-Radiation mode. This means that we will never send on these * channels without first having received valid wifi traffic on the channel. */ static void brcmf_fw_fix_efi_nvram_ccode(char *data, unsigned long data_len) { … } static u8 *brcmf_fw_nvram_from_efi(size_t *data_len_ret) { … } #else static inline u8 *brcmf_fw_nvram_from_efi(size_t *data_len) { return NULL; } #endif static void brcmf_fw_free_request(struct brcmf_fw_request *req) { … } static int brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx) { … } static int brcmf_fw_complete_request(const struct firmware *fw, struct brcmf_fw *fwctx) { … } static char *brcm_alt_fw_path(const char *path, const char *board_type) { … } static int brcmf_fw_request_firmware(const struct firmware **fw, struct brcmf_fw *fwctx) { … } static void brcmf_fw_request_done(const struct firmware *fw, void *ctx) { … } static void brcmf_fw_request_done_alt_path(const struct firmware *fw, void *ctx) { … } static bool brcmf_fw_request_is_valid(struct brcmf_fw_request *req) { … } int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req, void (*fw_cb)(struct device *dev, int err, struct brcmf_fw_request *req)) { … } struct brcmf_fw_request * brcmf_fw_alloc_request(u32 chip, u32 chiprev, const struct brcmf_firmware_mapping mapping_table[], u32 table_size, struct brcmf_fw_name *fwnames, u32 n_fwnames) { … }
Codebase Browser
linux