50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
|
|
* Copyright 2012 Red Hat Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Authors: Ben Skeggs
|
|
*/
|
|
#include <subdev/bios.h>
|
|
#include <subdev/bios/bit.h>
|
|
|
|
int
|
|
bit_entry(struct nvkm_bios *bios, u8 id, struct bit_entry *bit)
|
|
{
|
|
if (likely(bios->bit_offset)) {
|
|
u8 entries = nvbios_rd08(bios, bios->bit_offset + 10);
|
|
u32 entry = bios->bit_offset + 12;
|
|
while (entries--) {
|
|
if (nvbios_rd08(bios, entry + 0) == id) {
|
|
bit->id = nvbios_rd08(bios, entry + 0);
|
|
bit->version = nvbios_rd08(bios, entry + 1);
|
|
bit->length = nvbios_rd16(bios, entry + 2);
|
|
bit->offset = nvbios_rd16(bios, entry + 4);
|
|
return 0;
|
|
}
|
|
|
|
entry += nvbios_rd08(bios, bios->bit_offset + 9);
|
|
}
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|