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 
28 u32
nvbios_connTe(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)29 nvbios_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 
45 u32
nvbios_connTp(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_connT * info)46 nvbios_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 
61 u32
nvbios_connEe(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * len)62 nvbios_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 
71 u32
nvbios_connEp(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * len,struct nvbios_connE * info)72 nvbios_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