55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
|
/*
|
||
|
* skl-sst-utils.c - SKL sst utils functions
|
||
|
*
|
||
|
* Copyright (C) 2016 Intel Corp
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify
|
||
|
* it under the terms of the GNU General Public License as version 2, as
|
||
|
* published by the Free Software Foundation.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful, but
|
||
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
* General Public License for more details.
|
||
|
*/
|
||
|
|
||
|
#include <linux/firmware.h>
|
||
|
#include "skl-sst-dsp.h"
|
||
|
|
||
|
/* FW Extended Manifest Header id = $AE1 */
|
||
|
#define SKL_EXT_MANIFEST_HEADER_MAGIC 0x31454124
|
||
|
|
||
|
struct skl_ext_manifest_hdr {
|
||
|
u32 id;
|
||
|
u32 len;
|
||
|
u16 version_major;
|
||
|
u16 version_minor;
|
||
|
u32 entries;
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* some firmware binary contains some extended manifest. This needs
|
||
|
* to be stripped in that case before we load and use that image.
|
||
|
*
|
||
|
* So check for magic header, if found strip the header
|
||
|
*/
|
||
|
int skl_dsp_strip_extended_manifest(struct firmware *fw)
|
||
|
{
|
||
|
struct skl_ext_manifest_hdr *hdr;
|
||
|
|
||
|
/* check if fw file is greater than header we are looking */
|
||
|
if (fw->size < sizeof(hdr)) {
|
||
|
pr_err("%s: Firmware file small, no hdr\n", __func__);
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
hdr = (struct skl_ext_manifest_hdr *)fw->data;
|
||
|
|
||
|
if (hdr->id == SKL_EXT_MANIFEST_HEADER_MAGIC) {
|
||
|
fw->size -= hdr->len;
|
||
|
fw->data += hdr->len;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|