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https://github.com/torvalds/linux
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a74d036f98
New bus layers like pcie require nvram parsing routines which are the same routines as being used by sdio. Make these routines common in the new file nvram.c. Update sdio to use these routines and simplify the nvram upload process. Also add memory validation check for downloaded firmware and nvram in debug mode. Reviewed-by: Arend Van Spriel <arend@broadcom.com> Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> Signed-off-by: Hante Meuleman <meuleman@broadcom.com> Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
95 lines
2.3 KiB
C
95 lines
2.3 KiB
C
/*
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* Copyright (c) 2013 Broadcom Corporation
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/firmware.h>
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#include "nvram.h"
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/* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a file
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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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void *brcmf_nvram_strip(const struct firmware *nv, u32 *new_length)
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{
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u8 *nvram;
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u32 i;
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u32 len;
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u32 column;
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u8 val;
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bool comment;
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u32 token;
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__le32 token_le;
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/* Alloc for extra 0 byte + roundup by 4 + length field */
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nvram = kmalloc(nv->size + 1 + 3 + sizeof(token_le), GFP_KERNEL);
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if (!nvram)
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return NULL;
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len = 0;
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column = 0;
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comment = false;
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for (i = 0; i < nv->size; i++) {
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val = nv->data[i];
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if (val == 0)
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break;
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if (val == '\r')
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continue;
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if (comment && (val != '\n'))
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continue;
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comment = false;
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if (val == '#') {
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comment = true;
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continue;
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}
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if (val == '\n') {
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if (column == 0)
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continue;
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nvram[len] = 0;
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len++;
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column = 0;
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continue;
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}
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nvram[len] = val;
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len++;
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column++;
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}
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column = len;
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*new_length = roundup(len + 1, 4);
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while (column != *new_length) {
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nvram[column] = 0;
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column++;
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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(&nvram[*new_length], &token_le, sizeof(token_le));
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*new_length += sizeof(token_le);
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return nvram;
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}
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void brcmf_nvram_free(void *nvram)
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{
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kfree(nvram);
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}
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