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812 lines
20 KiB
812 lines
20 KiB
// SPDX-License-Identifier: ISC |
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/* |
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* Copyright (c) 2013 Broadcom Corporation |
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*/ |
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|
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#include <linux/efi.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/device.h> |
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#include <linux/firmware.h> |
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#include <linux/module.h> |
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#include <linux/bcm47xx_nvram.h> |
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#include <linux/ctype.h> |
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#include "debug.h" |
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#include "firmware.h" |
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#include "core.h" |
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#include "common.h" |
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#include "chip.h" |
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#define BRCMF_FW_MAX_NVRAM_SIZE 64000 |
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#define BRCMF_FW_NVRAM_DEVPATH_LEN 19 /* devpath0=pcie/1/4/ */ |
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#define BRCMF_FW_NVRAM_PCIEDEV_LEN 10 /* pcie/1/4/ + \0 */ |
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#define BRCMF_FW_DEFAULT_BOARDREV "boardrev=0xff" |
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enum nvram_parser_state { |
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IDLE, |
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KEY, |
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VALUE, |
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COMMENT, |
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END |
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}; |
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char saved_ccode[2] = {}; |
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/** |
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* struct nvram_parser - internal info for parser. |
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* |
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* @state: current parser state. |
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* @data: input buffer being parsed. |
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* @nvram: output buffer with parse result. |
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* @nvram_len: length of parse result. |
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* @line: current line. |
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* @column: current column in line. |
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* @pos: byte offset in input buffer. |
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* @entry: start position of key,value entry. |
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* @multi_dev_v1: detect pcie multi device v1 (compressed). |
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* @multi_dev_v2: detect pcie multi device v2. |
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* @boardrev_found: nvram contains boardrev information. |
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*/ |
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struct nvram_parser { |
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enum nvram_parser_state state; |
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const u8 *data; |
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u8 *nvram; |
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u32 nvram_len; |
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u32 line; |
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u32 column; |
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u32 pos; |
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u32 entry; |
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bool multi_dev_v1; |
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bool multi_dev_v2; |
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bool boardrev_found; |
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}; |
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/* |
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* is_nvram_char() - check if char is a valid one for NVRAM entry |
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* |
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* It accepts all printable ASCII chars except for '#' which opens a comment. |
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* Please note that ' ' (space) while accepted is not a valid key name char. |
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*/ |
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static bool is_nvram_char(char c) |
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{ |
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/* comment marker excluded */ |
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if (c == '#') |
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return false; |
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/* key and value may have any other readable character */ |
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return (c >= 0x20 && c < 0x7f); |
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} |
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static bool is_whitespace(char c) |
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{ |
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return (c == ' ' || c == '\r' || c == '\n' || c == '\t'); |
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} |
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static enum nvram_parser_state brcmf_nvram_handle_idle(struct nvram_parser *nvp) |
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{ |
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char c; |
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c = nvp->data[nvp->pos]; |
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if (c == '\n') |
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return COMMENT; |
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if (is_whitespace(c) || c == '\0') |
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goto proceed; |
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if (c == '#') |
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return COMMENT; |
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if (is_nvram_char(c)) { |
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nvp->entry = nvp->pos; |
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return KEY; |
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} |
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brcmf_dbg(INFO, "warning: ln=%d:col=%d: ignoring invalid character\n", |
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nvp->line, nvp->column); |
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proceed: |
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nvp->column++; |
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nvp->pos++; |
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return IDLE; |
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} |
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static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp) |
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{ |
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enum nvram_parser_state st = nvp->state; |
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char c; |
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c = nvp->data[nvp->pos]; |
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if (c == '=') { |
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/* ignore RAW1 by treating as comment */ |
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if (strncmp(&nvp->data[nvp->entry], "RAW1", 4) == 0) |
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st = COMMENT; |
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else |
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st = VALUE; |
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if (strncmp(&nvp->data[nvp->entry], "devpath", 7) == 0) |
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nvp->multi_dev_v1 = true; |
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if (strncmp(&nvp->data[nvp->entry], "pcie/", 5) == 0) |
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nvp->multi_dev_v2 = true; |
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if (strncmp(&nvp->data[nvp->entry], "boardrev", 8) == 0) |
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nvp->boardrev_found = true; |
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} else if (!is_nvram_char(c) || c == ' ') { |
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brcmf_dbg(INFO, "warning: ln=%d:col=%d: '=' expected, skip invalid key entry\n", |
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nvp->line, nvp->column); |
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return COMMENT; |
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} |
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nvp->column++; |
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nvp->pos++; |
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return st; |
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} |
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static enum nvram_parser_state |
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brcmf_nvram_handle_value(struct nvram_parser *nvp) |
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{ |
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char c; |
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char *skv; |
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char *ekv; |
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u32 cplen; |
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c = nvp->data[nvp->pos]; |
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if (!is_nvram_char(c)) { |
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/* key,value pair complete */ |
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ekv = (u8 *)&nvp->data[nvp->pos]; |
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skv = (u8 *)&nvp->data[nvp->entry]; |
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cplen = ekv - skv; |
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if (nvp->nvram_len + cplen + 1 >= BRCMF_FW_MAX_NVRAM_SIZE) |
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return END; |
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/* copy to output buffer */ |
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memcpy(&nvp->nvram[nvp->nvram_len], skv, cplen); |
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nvp->nvram_len += cplen; |
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nvp->nvram[nvp->nvram_len] = '\0'; |
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nvp->nvram_len++; |
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return IDLE; |
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} |
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nvp->pos++; |
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nvp->column++; |
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return VALUE; |
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} |
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static enum nvram_parser_state |
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brcmf_nvram_handle_comment(struct nvram_parser *nvp) |
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{ |
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char *eoc, *sol; |
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sol = (char *)&nvp->data[nvp->pos]; |
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eoc = strchr(sol, '\n'); |
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if (!eoc) { |
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eoc = strchr(sol, '\0'); |
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if (!eoc) |
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return END; |
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} |
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/* eat all moving to next line */ |
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nvp->line++; |
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nvp->column = 1; |
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nvp->pos += (eoc - sol) + 1; |
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return IDLE; |
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} |
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static enum nvram_parser_state brcmf_nvram_handle_end(struct nvram_parser *nvp) |
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{ |
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/* final state */ |
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return END; |
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} |
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static enum nvram_parser_state |
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(*nv_parser_states[])(struct nvram_parser *nvp) = { |
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brcmf_nvram_handle_idle, |
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brcmf_nvram_handle_key, |
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brcmf_nvram_handle_value, |
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brcmf_nvram_handle_comment, |
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brcmf_nvram_handle_end |
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}; |
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static int brcmf_init_nvram_parser(struct nvram_parser *nvp, |
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const u8 *data, size_t data_len) |
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{ |
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size_t size; |
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memset(nvp, 0, sizeof(*nvp)); |
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nvp->data = data; |
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/* Limit size to MAX_NVRAM_SIZE, some files contain lot of comment */ |
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if (data_len > BRCMF_FW_MAX_NVRAM_SIZE) |
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size = BRCMF_FW_MAX_NVRAM_SIZE; |
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else |
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size = data_len; |
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/* Alloc for extra 0 byte + roundup by 4 + length field */ |
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size += 1 + 3 + sizeof(u32); |
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nvp->nvram = kzalloc(size, GFP_KERNEL); |
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if (!nvp->nvram) |
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return -ENOMEM; |
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nvp->line = 1; |
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nvp->column = 1; |
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return 0; |
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} |
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/* brcmf_fw_strip_multi_v1 :Some nvram files contain settings for multiple |
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* devices. Strip it down for one device, use domain_nr/bus_nr to determine |
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* which data is to be returned. v1 is the version where nvram is stored |
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* compressed and "devpath" maps to index for valid entries. |
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*/ |
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static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr, |
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u16 bus_nr) |
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{ |
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/* Device path with a leading '=' key-value separator */ |
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char pci_path[] = "=pci/?/?"; |
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size_t pci_len; |
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char pcie_path[] = "=pcie/?/?"; |
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size_t pcie_len; |
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u32 i, j; |
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bool found; |
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u8 *nvram; |
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u8 id; |
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nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); |
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if (!nvram) |
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goto fail; |
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/* min length: devpath0=pcie/1/4/ + 0:x=y */ |
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if (nvp->nvram_len < BRCMF_FW_NVRAM_DEVPATH_LEN + 6) |
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goto fail; |
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/* First search for the devpathX and see if it is the configuration |
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* for domain_nr/bus_nr. Search complete nvp |
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*/ |
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snprintf(pci_path, sizeof(pci_path), "=pci/%d/%d", domain_nr, |
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bus_nr); |
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pci_len = strlen(pci_path); |
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snprintf(pcie_path, sizeof(pcie_path), "=pcie/%d/%d", domain_nr, |
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bus_nr); |
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pcie_len = strlen(pcie_path); |
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found = false; |
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i = 0; |
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while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) { |
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/* Format: devpathX=pcie/Y/Z/ |
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* Y = domain_nr, Z = bus_nr, X = virtual ID |
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*/ |
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if (strncmp(&nvp->nvram[i], "devpath", 7) == 0 && |
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(!strncmp(&nvp->nvram[i + 8], pci_path, pci_len) || |
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!strncmp(&nvp->nvram[i + 8], pcie_path, pcie_len))) { |
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id = nvp->nvram[i + 7] - '0'; |
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found = true; |
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break; |
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} |
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while (nvp->nvram[i] != 0) |
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i++; |
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i++; |
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} |
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if (!found) |
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goto fail; |
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/* Now copy all valid entries, release old nvram and assign new one */ |
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i = 0; |
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j = 0; |
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while (i < nvp->nvram_len) { |
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if ((nvp->nvram[i] - '0' == id) && (nvp->nvram[i + 1] == ':')) { |
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i += 2; |
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if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0) |
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nvp->boardrev_found = true; |
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while (nvp->nvram[i] != 0) { |
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nvram[j] = nvp->nvram[i]; |
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i++; |
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j++; |
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} |
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nvram[j] = 0; |
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j++; |
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} |
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while (nvp->nvram[i] != 0) |
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i++; |
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i++; |
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} |
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kfree(nvp->nvram); |
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nvp->nvram = nvram; |
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nvp->nvram_len = j; |
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return; |
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fail: |
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kfree(nvram); |
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nvp->nvram_len = 0; |
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} |
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/* brcmf_fw_strip_multi_v2 :Some nvram files contain settings for multiple |
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* devices. Strip it down for one device, use domain_nr/bus_nr to determine |
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* which data is to be returned. v2 is the version where nvram is stored |
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* uncompressed, all relevant valid entries are identified by |
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* pcie/domain_nr/bus_nr: |
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*/ |
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static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr, |
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u16 bus_nr) |
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{ |
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char prefix[BRCMF_FW_NVRAM_PCIEDEV_LEN]; |
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size_t len; |
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u32 i, j; |
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u8 *nvram; |
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nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); |
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if (!nvram) { |
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nvp->nvram_len = 0; |
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return; |
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} |
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/* Copy all valid entries, release old nvram and assign new one. |
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* Valid entries are of type pcie/X/Y/ where X = domain_nr and |
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* Y = bus_nr. |
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*/ |
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snprintf(prefix, sizeof(prefix), "pcie/%d/%d/", domain_nr, bus_nr); |
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len = strlen(prefix); |
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i = 0; |
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j = 0; |
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while (i < nvp->nvram_len - len) { |
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if (strncmp(&nvp->nvram[i], prefix, len) == 0) { |
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i += len; |
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if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0) |
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nvp->boardrev_found = true; |
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while (nvp->nvram[i] != 0) { |
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nvram[j] = nvp->nvram[i]; |
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i++; |
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j++; |
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} |
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nvram[j] = 0; |
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j++; |
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} |
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while (nvp->nvram[i] != 0) |
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i++; |
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i++; |
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} |
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kfree(nvp->nvram); |
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nvp->nvram = nvram; |
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nvp->nvram_len = j; |
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} |
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static void brcmf_fw_add_defaults(struct nvram_parser *nvp) |
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{ |
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if (nvp->boardrev_found) |
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return; |
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memcpy(&nvp->nvram[nvp->nvram_len], &BRCMF_FW_DEFAULT_BOARDREV, |
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strlen(BRCMF_FW_DEFAULT_BOARDREV)); |
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nvp->nvram_len += strlen(BRCMF_FW_DEFAULT_BOARDREV); |
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nvp->nvram[nvp->nvram_len] = '\0'; |
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nvp->nvram_len++; |
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} |
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/* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a fil |
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* and ending in a NUL. Removes carriage returns, empty lines, comment lines, |
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* and converts newlines to NULs. Shortens buffer as needed and pads with NULs. |
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* End of buffer is completed with token identifying length of buffer. |
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*/ |
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static void *brcmf_fw_nvram_strip(const u8 *data, size_t data_len, |
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u32 *new_length, u16 domain_nr, u16 bus_nr) |
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{ |
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struct nvram_parser nvp; |
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u32 pad; |
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u32 token; |
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__le32 token_le; |
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if (brcmf_init_nvram_parser(&nvp, data, data_len) < 0) |
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return NULL; |
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while (nvp.pos < data_len) { |
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nvp.state = nv_parser_states[nvp.state](&nvp); |
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if (nvp.state == END) |
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break; |
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} |
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if (nvp.multi_dev_v1) { |
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nvp.boardrev_found = false; |
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brcmf_fw_strip_multi_v1(&nvp, domain_nr, bus_nr); |
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} else if (nvp.multi_dev_v2) { |
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nvp.boardrev_found = false; |
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brcmf_fw_strip_multi_v2(&nvp, domain_nr, bus_nr); |
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} |
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if (nvp.nvram_len == 0) { |
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kfree(nvp.nvram); |
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return NULL; |
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} |
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brcmf_fw_add_defaults(&nvp); |
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pad = nvp.nvram_len; |
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*new_length = roundup(nvp.nvram_len + 1, 4); |
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while (pad != *new_length) { |
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nvp.nvram[pad] = 0; |
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pad++; |
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} |
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token = *new_length / 4; |
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token = (~token << 16) | (token & 0x0000FFFF); |
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token_le = cpu_to_le32(token); |
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memcpy(&nvp.nvram[*new_length], &token_le, sizeof(token_le)); |
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*new_length += sizeof(token_le); |
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return nvp.nvram; |
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} |
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void brcmf_fw_nvram_free(void *nvram) |
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{ |
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kfree(nvram); |
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} |
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struct brcmf_fw { |
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struct device *dev; |
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struct brcmf_fw_request *req; |
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u32 curpos; |
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void (*done)(struct device *dev, int err, struct brcmf_fw_request *req); |
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}; |
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#ifdef CONFIG_EFI |
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/* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV" |
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* to specify "worldwide" compatible settings, but these 2 ccode-s do not work |
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* properly. "ccode=ALL" causes channels 12 and 13 to not be available, |
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* "ccode=XV" causes all 5GHz channels to not be available. So we replace both |
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* with "ccode=X2" which allows channels 12+13 and 5Ghz channels in |
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* no-Initiate-Radiation mode. This means that we will never send on these |
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* channels without first having received valid wifi traffic on the channel. |
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*/ |
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static void brcmf_fw_fix_efi_nvram_ccode(char *data, unsigned long data_len) |
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{ |
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char *ccode; |
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ccode = strnstr((char *)data, "ccode=ALL", data_len); |
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if (!ccode) |
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ccode = strnstr((char *)data, "ccode=XV\r", data_len); |
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if (!ccode) |
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return; |
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ccode[6] = 'X'; |
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ccode[7] = '2'; |
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ccode[8] = '\r'; |
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} |
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static u8 *brcmf_fw_nvram_from_efi(size_t *data_len_ret) |
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{ |
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const u16 name[] = { 'n', 'v', 'r', 'a', 'm', 0 }; |
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struct efivar_entry *nvram_efivar; |
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unsigned long data_len = 0; |
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u8 *data = NULL; |
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int err; |
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nvram_efivar = kzalloc(sizeof(*nvram_efivar), GFP_KERNEL); |
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if (!nvram_efivar) |
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return NULL; |
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memcpy(&nvram_efivar->var.VariableName, name, sizeof(name)); |
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nvram_efivar->var.VendorGuid = EFI_GUID(0x74b00bd9, 0x805a, 0x4d61, |
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0xb5, 0x1f, 0x43, 0x26, |
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0x81, 0x23, 0xd1, 0x13); |
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err = efivar_entry_size(nvram_efivar, &data_len); |
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if (err) |
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goto fail; |
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data = kmalloc(data_len, GFP_KERNEL); |
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if (!data) |
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goto fail; |
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err = efivar_entry_get(nvram_efivar, NULL, &data_len, data); |
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if (err) |
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goto fail; |
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brcmf_fw_fix_efi_nvram_ccode(data, data_len); |
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brcmf_info("Using nvram EFI variable\n"); |
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kfree(nvram_efivar); |
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*data_len_ret = data_len; |
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return data; |
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fail: |
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kfree(data); |
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kfree(nvram_efivar); |
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return NULL; |
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} |
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#else |
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static inline u8 *brcmf_fw_nvram_from_efi(size_t *data_len) { return NULL; } |
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#endif |
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static void brcmf_fw_free_request(struct brcmf_fw_request *req) |
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{ |
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struct brcmf_fw_item *item; |
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int i; |
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for (i = 0, item = &req->items[0]; i < req->n_items; i++, item++) { |
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if (item->type == BRCMF_FW_TYPE_BINARY) |
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release_firmware(item->binary); |
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else if (item->type == BRCMF_FW_TYPE_NVRAM) |
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brcmf_fw_nvram_free(item->nv_data.data); |
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} |
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kfree(req); |
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} |
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static int brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx) |
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{ |
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struct brcmf_fw *fwctx = ctx; |
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struct brcmf_fw_item *cur; |
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bool free_bcm47xx_nvram = false; |
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bool kfree_nvram = false; |
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u32 nvram_length = 0; |
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void *nvram = NULL; |
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u8 *data = NULL; |
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size_t data_len; |
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brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev)); |
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cur = &fwctx->req->items[fwctx->curpos]; |
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|
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if (fw && fw->data) { |
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data = (u8 *)fw->data; |
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data_len = fw->size; |
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} else { |
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if ((data = bcm47xx_nvram_get_contents(&data_len))) |
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free_bcm47xx_nvram = true; |
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else if ((data = brcmf_fw_nvram_from_efi(&data_len))) |
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kfree_nvram = true; |
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else if (!(cur->flags & BRCMF_FW_REQF_OPTIONAL)) |
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goto fail; |
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} |
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if (data) { |
|
char *ccode = strnstr((char *)data, "ccode=", data_len); |
|
/* Ensure this is a whole token */ |
|
if (ccode && ((void *)ccode == (void *)data || isspace(ccode[-1]))) { |
|
/* Comment out the line */ |
|
ccode[0] = '#'; |
|
ccode += 6; |
|
if (isupper(ccode[0]) && isupper(ccode[1]) && |
|
isspace(ccode[2])) { |
|
pr_debug("brcmfmac: intercepting ccode=%c%c\n", |
|
ccode[0], ccode[1]); |
|
saved_ccode[0] = ccode[0]; |
|
saved_ccode[1] = ccode[1]; |
|
} |
|
}; |
|
|
|
nvram = brcmf_fw_nvram_strip(data, data_len, &nvram_length, |
|
fwctx->req->domain_nr, |
|
fwctx->req->bus_nr); |
|
} |
|
|
|
if (free_bcm47xx_nvram) |
|
bcm47xx_nvram_release_contents(data); |
|
if (kfree_nvram) |
|
kfree(data); |
|
|
|
release_firmware(fw); |
|
if (!nvram && !(cur->flags & BRCMF_FW_REQF_OPTIONAL)) |
|
goto fail; |
|
|
|
brcmf_dbg(TRACE, "nvram %p len %d\n", nvram, nvram_length); |
|
cur->nv_data.data = nvram; |
|
cur->nv_data.len = nvram_length; |
|
return 0; |
|
|
|
fail: |
|
return -ENOENT; |
|
} |
|
|
|
static int brcmf_fw_complete_request(const struct firmware *fw, |
|
struct brcmf_fw *fwctx) |
|
{ |
|
struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos]; |
|
int ret = 0; |
|
|
|
brcmf_dbg(TRACE, "firmware %s %sfound\n", cur->path, fw ? "" : "not "); |
|
|
|
switch (cur->type) { |
|
case BRCMF_FW_TYPE_NVRAM: |
|
ret = brcmf_fw_request_nvram_done(fw, fwctx); |
|
break; |
|
case BRCMF_FW_TYPE_BINARY: |
|
if (fw) |
|
cur->binary = fw; |
|
else |
|
ret = -ENOENT; |
|
break; |
|
default: |
|
/* something fishy here so bail out early */ |
|
brcmf_err("unknown fw type: %d\n", cur->type); |
|
release_firmware(fw); |
|
ret = -EINVAL; |
|
} |
|
|
|
return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret; |
|
} |
|
|
|
static char *brcm_alt_fw_path(const char *path, const char *board_type) |
|
{ |
|
char alt_path[BRCMF_FW_NAME_LEN]; |
|
char suffix[5]; |
|
|
|
strscpy(alt_path, path, BRCMF_FW_NAME_LEN); |
|
/* At least one character + suffix */ |
|
if (strlen(alt_path) < 5) |
|
return NULL; |
|
|
|
/* strip .txt or .bin at the end */ |
|
strscpy(suffix, alt_path + strlen(alt_path) - 4, 5); |
|
alt_path[strlen(alt_path) - 4] = 0; |
|
strlcat(alt_path, ".", BRCMF_FW_NAME_LEN); |
|
strlcat(alt_path, board_type, BRCMF_FW_NAME_LEN); |
|
strlcat(alt_path, suffix, BRCMF_FW_NAME_LEN); |
|
|
|
return kstrdup(alt_path, GFP_KERNEL); |
|
} |
|
|
|
static int brcmf_fw_request_firmware(const struct firmware **fw, |
|
struct brcmf_fw *fwctx) |
|
{ |
|
struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos]; |
|
int ret; |
|
|
|
/* Files can be board-specific, first try a board-specific path */ |
|
if (cur->type == BRCMF_FW_TYPE_NVRAM && fwctx->req->board_type) { |
|
char *alt_path; |
|
|
|
alt_path = brcm_alt_fw_path(cur->path, fwctx->req->board_type); |
|
if (!alt_path) |
|
goto fallback; |
|
|
|
ret = firmware_request_nowarn(fw, alt_path, fwctx->dev); |
|
kfree(alt_path); |
|
if (ret == 0) |
|
return ret; |
|
} |
|
|
|
fallback: |
|
return request_firmware(fw, cur->path, fwctx->dev); |
|
} |
|
|
|
static void brcmf_fw_request_done(const struct firmware *fw, void *ctx) |
|
{ |
|
struct brcmf_fw *fwctx = ctx; |
|
int ret; |
|
|
|
ret = brcmf_fw_complete_request(fw, fwctx); |
|
|
|
while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) { |
|
brcmf_fw_request_firmware(&fw, fwctx); |
|
ret = brcmf_fw_complete_request(fw, ctx); |
|
} |
|
|
|
if (ret) { |
|
brcmf_fw_free_request(fwctx->req); |
|
fwctx->req = NULL; |
|
} |
|
fwctx->done(fwctx->dev, ret, fwctx->req); |
|
kfree(fwctx); |
|
} |
|
|
|
static void brcmf_fw_request_done_alt_path(const struct firmware *fw, void *ctx) |
|
{ |
|
struct brcmf_fw *fwctx = ctx; |
|
struct brcmf_fw_item *first = &fwctx->req->items[0]; |
|
int ret = 0; |
|
|
|
/* Fall back to canonical path if board firmware not found */ |
|
if (!fw) |
|
ret = request_firmware_nowait(THIS_MODULE, true, first->path, |
|
fwctx->dev, GFP_KERNEL, fwctx, |
|
brcmf_fw_request_done); |
|
|
|
if (fw || ret < 0) |
|
brcmf_fw_request_done(fw, ctx); |
|
} |
|
|
|
static bool brcmf_fw_request_is_valid(struct brcmf_fw_request *req) |
|
{ |
|
struct brcmf_fw_item *item; |
|
int i; |
|
|
|
if (!req->n_items) |
|
return false; |
|
|
|
for (i = 0, item = &req->items[0]; i < req->n_items; i++, item++) { |
|
if (!item->path) |
|
return false; |
|
} |
|
return true; |
|
} |
|
|
|
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_item *first = &req->items[0]; |
|
struct brcmf_fw *fwctx; |
|
char *alt_path; |
|
int ret; |
|
|
|
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev)); |
|
if (!fw_cb) |
|
return -EINVAL; |
|
|
|
if (!brcmf_fw_request_is_valid(req)) |
|
return -EINVAL; |
|
|
|
fwctx = kzalloc(sizeof(*fwctx), GFP_KERNEL); |
|
if (!fwctx) |
|
return -ENOMEM; |
|
|
|
fwctx->dev = dev; |
|
fwctx->req = req; |
|
fwctx->done = fw_cb; |
|
|
|
/* First try alternative board-specific path if any */ |
|
alt_path = brcm_alt_fw_path(first->path, fwctx->req->board_type); |
|
if (alt_path) { |
|
ret = request_firmware_nowait(THIS_MODULE, true, alt_path, |
|
fwctx->dev, GFP_KERNEL, fwctx, |
|
brcmf_fw_request_done_alt_path); |
|
kfree(alt_path); |
|
} else { |
|
ret = request_firmware_nowait(THIS_MODULE, true, first->path, |
|
fwctx->dev, GFP_KERNEL, fwctx, |
|
brcmf_fw_request_done); |
|
} |
|
if (ret < 0) |
|
brcmf_fw_request_done(NULL, fwctx); |
|
|
|
return 0; |
|
} |
|
|
|
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) |
|
{ |
|
struct brcmf_fw_request *fwreq; |
|
char chipname[12]; |
|
const char *mp_path; |
|
size_t mp_path_len; |
|
u32 i, j; |
|
char end = '\0'; |
|
|
|
for (i = 0; i < table_size; i++) { |
|
if (mapping_table[i].chipid == chip && |
|
mapping_table[i].revmask & BIT(chiprev)) |
|
break; |
|
} |
|
|
|
brcmf_chip_name(chip, chiprev, chipname, sizeof(chipname)); |
|
|
|
if (i == table_size) { |
|
brcmf_err("Unknown chip %s\n", chipname); |
|
return NULL; |
|
} |
|
|
|
fwreq = kzalloc(struct_size(fwreq, items, n_fwnames), GFP_KERNEL); |
|
if (!fwreq) |
|
return NULL; |
|
|
|
brcmf_info("using %s for chip %s\n", |
|
mapping_table[i].fw_base, chipname); |
|
|
|
mp_path = brcmf_mp_global.firmware_path; |
|
mp_path_len = strnlen(mp_path, BRCMF_FW_ALTPATH_LEN); |
|
if (mp_path_len) |
|
end = mp_path[mp_path_len - 1]; |
|
|
|
fwreq->n_items = n_fwnames; |
|
|
|
for (j = 0; j < n_fwnames; j++) { |
|
fwreq->items[j].path = fwnames[j].path; |
|
fwnames[j].path[0] = '\0'; |
|
/* check if firmware path is provided by module parameter */ |
|
if (brcmf_mp_global.firmware_path[0] != '\0') { |
|
strlcpy(fwnames[j].path, mp_path, |
|
BRCMF_FW_NAME_LEN); |
|
|
|
if (end != '/') { |
|
strlcat(fwnames[j].path, "/", |
|
BRCMF_FW_NAME_LEN); |
|
} |
|
} |
|
strlcat(fwnames[j].path, mapping_table[i].fw_base, |
|
BRCMF_FW_NAME_LEN); |
|
strlcat(fwnames[j].path, fwnames[j].extension, |
|
BRCMF_FW_NAME_LEN); |
|
fwreq->items[j].path = fwnames[j].path; |
|
} |
|
|
|
return fwreq; |
|
}
|
|
|