1/* $NetBSD: nouveau_subdev_bios_bit.c,v 1.1.1.1 2014/08/06 12:36:28 riastradh Exp $ */
2
3/*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26
27#include <sys/cdefs.h>
28__KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bios_bit.c,v 1.1.1.1 2014/08/06 12:36:28 riastradh Exp $");
29
30#include "core/object.h"
31
32#include "subdev/bios.h"
33#include "subdev/bios/bit.h"
34
35int
36bit_entry(struct nouveau_bios *bios, u8 id, struct bit_entry *bit)
37{
38 if (likely(bios->bit_offset)) {
39 u8 entries = nv_ro08(bios, bios->bit_offset + 10);
40 u32 entry = bios->bit_offset + 12;
41 while (entries--) {
42 if (nv_ro08(bios, entry + 0) == id) {
43 bit->id = nv_ro08(bios, entry + 0);
44 bit->version = nv_ro08(bios, entry + 1);
45 bit->length = nv_ro16(bios, entry + 2);
46 bit->offset = nv_ro16(bios, entry + 4);
47 return 0;
48 }
49
50 entry += nv_ro08(bios, bios->bit_offset + 9);
51 }
52
53 return -ENOENT;
54 }
55
56 return -EINVAL;
57}
58