1 /* $NetBSD: nouveau_nvkm_subdev_bios_conn.c,v 1.3 2021/12/18 23:45:38 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 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_conn.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
28
29 #include <subdev/bios.h>
30 #include <subdev/bios/dcb.h>
31 #include <subdev/bios/conn.h>
32
33 u32
nvbios_connTe(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)34 nvbios_connTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
35 {
36 u32 dcb = dcb_table(bios, ver, hdr, cnt, len);
37 if (dcb && *ver >= 0x30 && *hdr >= 0x16) {
38 u32 data = nvbios_rd16(bios, dcb + 0x14);
39 if (data) {
40 *ver = nvbios_rd08(bios, data + 0);
41 *hdr = nvbios_rd08(bios, data + 1);
42 *cnt = nvbios_rd08(bios, data + 2);
43 *len = nvbios_rd08(bios, data + 3);
44 return data;
45 }
46 }
47 return 0x00000000;
48 }
49
50 u32
nvbios_connTp(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_connT * info)51 nvbios_connTp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
52 struct nvbios_connT *info)
53 {
54 u32 data = nvbios_connTe(bios, ver, hdr, cnt, len);
55 memset(info, 0x00, sizeof(*info));
56 switch (!!data * *ver) {
57 case 0x30:
58 case 0x40:
59 return data;
60 default:
61 break;
62 }
63 return 0x00000000;
64 }
65
66 u32
nvbios_connEe(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * len)67 nvbios_connEe(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len)
68 {
69 u8 hdr, cnt;
70 u32 data = nvbios_connTe(bios, ver, &hdr, &cnt, len);
71 if (data && idx < cnt)
72 return data + hdr + (idx * *len);
73 return 0x00000000;
74 }
75
76 u32
nvbios_connEp(struct nvkm_bios * bios,u8 idx,u8 * ver,u8 * len,struct nvbios_connE * info)77 nvbios_connEp(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
78 struct nvbios_connE *info)
79 {
80 u32 data = nvbios_connEe(bios, idx, ver, len);
81 memset(info, 0x00, sizeof(*info));
82 switch (!!data * *ver) {
83 case 0x30:
84 case 0x40:
85 info->type = nvbios_rd08(bios, data + 0x00);
86 info->location = nvbios_rd08(bios, data + 0x01) & 0x0f;
87 info->hpd = (nvbios_rd08(bios, data + 0x01) & 0x30) >> 4;
88 info->dp = (nvbios_rd08(bios, data + 0x01) & 0xc0) >> 6;
89 if (*len < 4)
90 return data;
91 info->hpd |= (nvbios_rd08(bios, data + 0x02) & 0x03) << 2;
92 info->dp |= nvbios_rd08(bios, data + 0x02) & 0x0c;
93 info->di = (nvbios_rd08(bios, data + 0x02) & 0xf0) >> 4;
94 info->hpd |= (nvbios_rd08(bios, data + 0x03) & 0x07) << 4;
95 info->sr = (nvbios_rd08(bios, data + 0x03) & 0x08) >> 3;
96 info->lcdid = (nvbios_rd08(bios, data + 0x03) & 0x70) >> 4;
97 return data;
98 default:
99 break;
100 }
101 return 0x00000000;
102 }
103