1 /*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24
25 #include <core/device.h>
26
27 #include <subdev/bios.h>
28 #include <subdev/bios/dcb.h>
29 #include <subdev/bios/conn.h>
30
31 u16
dcb_conntab(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)32 dcb_conntab(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
33 {
34 u16 dcb = dcb_table(bios, ver, hdr, cnt, len);
35 if (dcb && *ver >= 0x30 && *hdr >= 0x16) {
36 u16 data = nv_ro16(bios, dcb + 0x14);
37 if (data) {
38 *ver = nv_ro08(bios, data + 0);
39 *hdr = nv_ro08(bios, data + 1);
40 *cnt = nv_ro08(bios, data + 2);
41 *len = nv_ro08(bios, data + 3);
42 return data;
43 }
44 }
45 return 0x0000;
46 }
47
48 u16
dcb_conn(struct nouveau_bios * bios,u8 idx,u8 * ver,u8 * len)49 dcb_conn(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len)
50 {
51 u8 hdr, cnt;
52 u16 data = dcb_conntab(bios, ver, &hdr, &cnt, len);
53 if (data && idx < cnt)
54 return data + hdr + (idx * *len);
55 return 0x0000;
56 }
57