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 <subdev/bios.h>
26 #include <subdev/bios/gpio.h>
27 #include <subdev/bios/xpio.h>
28
29 static u16
dcb_xpiod_table(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)30 dcb_xpiod_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
31 {
32 u16 data = dcb_gpio_table(bios, ver, hdr, cnt, len);
33 if (data && *ver >= 0x40 && *hdr >= 0x06) {
34 u16 xpio = nv_ro16(bios, data + 0x04);
35 if (xpio) {
36 *ver = nv_ro08(bios, data + 0x00);
37 *hdr = nv_ro08(bios, data + 0x01);
38 *cnt = nv_ro08(bios, data + 0x02);
39 *len = nv_ro08(bios, data + 0x03);
40 return xpio;
41 }
42 }
43 return 0x0000;
44 }
45
46 u16
dcb_xpio_table(struct nouveau_bios * bios,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)47 dcb_xpio_table(struct nouveau_bios *bios, u8 idx,
48 u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
49 {
50 u16 data = dcb_xpiod_table(bios, ver, hdr, cnt, len);
51 if (data && idx < *cnt) {
52 u16 xpio = nv_ro16(bios, data + *hdr + (idx * *len));
53 if (xpio) {
54 *ver = nv_ro08(bios, data + 0x00);
55 *hdr = nv_ro08(bios, data + 0x01);
56 *cnt = nv_ro08(bios, data + 0x02);
57 *len = nv_ro08(bios, data + 0x03);
58 return xpio;
59 }
60 }
61 return 0x0000;
62 }
63
64 u16
dcb_xpio_parse(struct nouveau_bios * bios,u8 idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_xpio * info)65 dcb_xpio_parse(struct nouveau_bios *bios, u8 idx,
66 u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
67 struct nvbios_xpio *info)
68 {
69 u16 data = dcb_xpio_table(bios, idx, ver, hdr, cnt, len);
70 if (data && *len >= 6) {
71 info->type = nv_ro08(bios, data + 0x04);
72 info->addr = nv_ro08(bios, data + 0x05);
73 info->flags = nv_ro08(bios, data + 0x06);
74 }
75 return 0x0000;
76 }
77