1 | /* $NetBSD: nouveau_subdev_bios_mxm.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_mxm.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $" ); |
29 | |
30 | #include <subdev/bios.h> |
31 | #include <subdev/bios/bit.h> |
32 | #include <subdev/bios/mxm.h> |
33 | |
34 | u16 |
35 | mxm_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr) |
36 | { |
37 | struct bit_entry x; |
38 | |
39 | if (bit_entry(bios, 'x', &x)) { |
40 | nv_debug(bios, "BIT 'x' table not present\n" ); |
41 | return 0x0000; |
42 | } |
43 | |
44 | *ver = x.version; |
45 | *hdr = x.length; |
46 | if (*ver != 1 || *hdr < 3) { |
47 | nv_warn(bios, "BIT 'x' table %d/%d unknown\n" , *ver, *hdr); |
48 | return 0x0000; |
49 | } |
50 | |
51 | return x.offset; |
52 | } |
53 | |
54 | /* These map MXM v2.x digital connection values to the appropriate SOR/link, |
55 | * hopefully they're correct for all boards within the same chipset... |
56 | * |
57 | * MXM v3.x VBIOS are nicer and provide pointers to these tables. |
58 | */ |
59 | static u8 nv84_sor_map[16] = { |
60 | 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, |
61 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
62 | }; |
63 | |
64 | static u8 nv92_sor_map[16] = { |
65 | 0x00, 0x12, 0x22, 0x11, 0x32, 0x31, 0x11, 0x31, |
66 | 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
67 | }; |
68 | |
69 | static u8 nv94_sor_map[16] = { |
70 | 0x00, 0x14, 0x24, 0x11, 0x34, 0x31, 0x11, 0x31, |
71 | 0x11, 0x31, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00 |
72 | }; |
73 | |
74 | static u8 nv98_sor_map[16] = { |
75 | 0x00, 0x14, 0x12, 0x11, 0x00, 0x31, 0x11, 0x31, |
76 | 0x11, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
77 | }; |
78 | |
79 | u8 |
80 | mxm_sor_map(struct nouveau_bios *bios, u8 conn) |
81 | { |
82 | u8 ver, hdr; |
83 | u16 mxm = mxm_table(bios, &ver, &hdr); |
84 | if (mxm && hdr >= 6) { |
85 | u16 map = nv_ro16(bios, mxm + 4); |
86 | if (map) { |
87 | ver = nv_ro08(bios, map); |
88 | if (ver == 0x10) { |
89 | if (conn < nv_ro08(bios, map + 3)) { |
90 | map += nv_ro08(bios, map + 1); |
91 | map += conn; |
92 | return nv_ro08(bios, map); |
93 | } |
94 | |
95 | return 0x00; |
96 | } |
97 | |
98 | nv_warn(bios, "unknown sor map v%02x\n" , ver); |
99 | } |
100 | } |
101 | |
102 | if (bios->version.chip == 0x84 || bios->version.chip == 0x86) |
103 | return nv84_sor_map[conn]; |
104 | if (bios->version.chip == 0x92) |
105 | return nv92_sor_map[conn]; |
106 | if (bios->version.chip == 0x94 || bios->version.chip == 0x96) |
107 | return nv94_sor_map[conn]; |
108 | if (bios->version.chip == 0x98) |
109 | return nv98_sor_map[conn]; |
110 | |
111 | nv_warn(bios, "missing sor map\n" ); |
112 | return 0x00; |
113 | } |
114 | |
115 | u8 |
116 | mxm_ddc_map(struct nouveau_bios *bios, u8 port) |
117 | { |
118 | u8 ver, hdr; |
119 | u16 mxm = mxm_table(bios, &ver, &hdr); |
120 | if (mxm && hdr >= 8) { |
121 | u16 map = nv_ro16(bios, mxm + 6); |
122 | if (map) { |
123 | ver = nv_ro08(bios, map); |
124 | if (ver == 0x10) { |
125 | if (port < nv_ro08(bios, map + 3)) { |
126 | map += nv_ro08(bios, map + 1); |
127 | map += port; |
128 | return nv_ro08(bios, map); |
129 | } |
130 | |
131 | return 0x00; |
132 | } |
133 | |
134 | nv_warn(bios, "unknown ddc map v%02x\n" , ver); |
135 | } |
136 | } |
137 | |
138 | /* v2.x: directly write port as dcb i2cidx */ |
139 | return (port << 4) | port; |
140 | } |
141 | |