1 /* $NetBSD: nouveau_subdev_bios_conn.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_conn.c,v 1.1.1.1 2014/08/06 12:36:28 riastradh Exp $");
29
30 #include <core/device.h>
31
32 #include <subdev/bios.h>
33 #include <subdev/bios/dcb.h>
34 #include <subdev/bios/conn.h>
35
36 u16
dcb_conntab(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)37 dcb_conntab(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
38 {
39 u16 dcb = dcb_table(bios, ver, hdr, cnt, len);
40 if (dcb && *ver >= 0x30 && *hdr >= 0x16) {
41 u16 data = nv_ro16(bios, dcb + 0x14);
42 if (data) {
43 *ver = nv_ro08(bios, data + 0);
44 *hdr = nv_ro08(bios, data + 1);
45 *cnt = nv_ro08(bios, data + 2);
46 *len = nv_ro08(bios, data + 3);
47 return data;
48 }
49 }
50 return 0x0000;
51 }
52
53 u16
dcb_conn(struct nouveau_bios * bios,u8 idx,u8 * ver,u8 * len)54 dcb_conn(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len)
55 {
56 u8 hdr, cnt;
57 u16 data = dcb_conntab(bios, ver, &hdr, &cnt, len);
58 if (data && idx < cnt)
59 return data + hdr + (idx * *len);
60 return 0x0000;
61 }
62