1 /* $NetBSD: nouveau_subdev_bios_xpio.c,v 1.1.1.1 2014/08/06 12:36:29 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_xpio.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $");
29
30 #include <subdev/bios.h>
31 #include <subdev/bios/gpio.h>
32 #include <subdev/bios/xpio.h>
33
34 static u16
dcb_xpiod_table(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)35 dcb_xpiod_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
36 {
37 u16 data = dcb_gpio_table(bios, ver, hdr, cnt, len);
38 if (data && *ver >= 0x40 && *hdr >= 0x06) {
39 u16 xpio = nv_ro16(bios, data + 0x04);
40 if (xpio) {
41 *ver = nv_ro08(bios, data + 0x00);
42 *hdr = nv_ro08(bios, data + 0x01);
43 *cnt = nv_ro08(bios, data + 0x02);
44 *len = nv_ro08(bios, data + 0x03);
45 return xpio;
46 }
47 }
48 return 0x0000;
49 }
50
51 u16
dcb_xpio_table(struct nouveau_bios * bios,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)52 dcb_xpio_table(struct nouveau_bios *bios, u8 idx,
53 u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
54 {
55 u16 data = dcb_xpiod_table(bios, ver, hdr, cnt, len);
56 if (data && idx < *cnt) {
57 u16 xpio = nv_ro16(bios, data + *hdr + (idx * *len));
58 if (xpio) {
59 *ver = nv_ro08(bios, data + 0x00);
60 *hdr = nv_ro08(bios, data + 0x01);
61 *cnt = nv_ro08(bios, data + 0x02);
62 *len = nv_ro08(bios, data + 0x03);
63 return xpio;
64 }
65 }
66 return 0x0000;
67 }
68
69 u16
dcb_xpio_parse(struct nouveau_bios * bios,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_xpio * info)70 dcb_xpio_parse(struct nouveau_bios *bios, u8 idx,
71 u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
72 struct nvbios_xpio *info)
73 {
74 u16 data = dcb_xpio_table(bios, idx, ver, hdr, cnt, len);
75 if (data && *len >= 6) {
76 info->type = nv_ro08(bios, data + 0x04);
77 info->addr = nv_ro08(bios, data + 0x05);
78 info->flags = nv_ro08(bios, data + 0x06);
79 }
80 return 0x0000;
81 }
82