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#include <subdev/bios.h>
25#include <subdev/bios/dcb.h>
26#include <subdev/bios/conn.h>
27
28u32
29nvbios_connTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
30{
31	u32 dcb = dcb_table(bios, ver, hdr, cnt, len);
32	if (dcb && *ver >= 0x30 && *hdr >= 0x16) {
33		u32 data = nvbios_rd16(bios, dcb + 0x14);
34		if (data) {
35			*ver = nvbios_rd08(bios, data + 0);
36			*hdr = nvbios_rd08(bios, data + 1);
37			*cnt = nvbios_rd08(bios, data + 2);
38			*len = nvbios_rd08(bios, data + 3);
39			return data;
40		}
41	}
42	return 0x00000000;
43}
44
45u32
46nvbios_connTp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
47	      struct nvbios_connT *info)
48{
49	u32 data = nvbios_connTe(bios, ver, hdr, cnt, len);
50	memset(info, 0x00, sizeof(*info));
51	switch (!!data * *ver) {
52	case 0x30:
53	case 0x40:
54		return data;
55	default:
56		break;
57	}
58	return 0x00000000;
59}
60
61u32
62nvbios_connEe(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len)
63{
64	u8  hdr, cnt;
65	u32 data = nvbios_connTe(bios, ver, &hdr, &cnt, len);
66	if (data && idx < cnt)
67		return data + hdr + (idx * *len);
68	return 0x00000000;
69}
70
71u32
72nvbios_connEp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
73	      struct nvbios_connE *info)
74{
75	u32 data = nvbios_connEe(bios, idx, ver, len);
76	memset(info, 0x00, sizeof(*info));
77	switch (!!data * *ver) {
78	case 0x30:
79	case 0x40:
80		info->type     =  nvbios_rd08(bios, data + 0x00);
81		info->location =  nvbios_rd08(bios, data + 0x01) & 0x0f;
82		info->hpd      = (nvbios_rd08(bios, data + 0x01) & 0x30) >> 4;
83		info->dp       = (nvbios_rd08(bios, data + 0x01) & 0xc0) >> 6;
84		if (*len < 4)
85			return data;
86		info->hpd     |= (nvbios_rd08(bios, data + 0x02) & 0x03) << 2;
87		info->dp      |=  nvbios_rd08(bios, data + 0x02) & 0x0c;
88		info->di       = (nvbios_rd08(bios, data + 0x02) & 0xf0) >> 4;
89		info->hpd     |= (nvbios_rd08(bios, data + 0x03) & 0x07) << 4;
90		info->sr       = (nvbios_rd08(bios, data + 0x03) & 0x08) >> 3;
91		info->lcdid    = (nvbios_rd08(bios, data + 0x03) & 0x70) >> 4;
92		return data;
93	default:
94		break;
95	}
96	return 0x00000000;
97}
98