/*
* 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;
}
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