1/* $NetBSD: nouveau_subdev_bios_dp.c,v 1.1.1.1 2014/08/06 12:36:28 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
28#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bios_dp.c,v 1.1.1.1 2014/08/06 12:36:28 riastradh Exp $");
30
31#include "subdev/bios.h"
32#include "subdev/bios/bit.h"
33#include "subdev/bios/dp.h"
34
35static u16
36nvbios_dp_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
37{
38 struct bit_entry d;
39
40 if (!bit_entry(bios, 'd', &d)) {
41 if (d.version == 1 && d.length >= 2) {
42 u16 data = nv_ro16(bios, d.offset);
43 if (data) {
44 *ver = nv_ro08(bios, data + 0x00);
45 switch (*ver) {
46 case 0x21:
47 case 0x30:
48 case 0x40:
49 *hdr = nv_ro08(bios, data + 0x01);
50 *len = nv_ro08(bios, data + 0x02);
51 *cnt = nv_ro08(bios, data + 0x03);
52 return data;
53 default:
54 break;
55 }
56 }
57 }
58 }
59
60 return 0x0000;
61}
62
63static u16
64nvbios_dpout_entry(struct nouveau_bios *bios, u8 idx,
65 u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
66{
67 u16 data = nvbios_dp_table(bios, ver, hdr, cnt, len);
68 if (data && idx < *cnt) {
69 u16 outp = nv_ro16(bios, data + *hdr + idx * *len);
70 switch (*ver * !!outp) {
71 case 0x21:
72 case 0x30:
73 *hdr = nv_ro08(bios, data + 0x04);
74 *len = nv_ro08(bios, data + 0x05);
75 *cnt = nv_ro08(bios, outp + 0x04);
76 break;
77 case 0x40:
78 *hdr = nv_ro08(bios, data + 0x04);
79 *cnt = 0;
80 *len = 0;
81 break;
82 default:
83 break;
84 }
85 return outp;
86 }
87 *ver = 0x00;
88 return 0x0000;
89}
90
91u16
92nvbios_dpout_parse(struct nouveau_bios *bios, u8 idx,
93 u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
94 struct nvbios_dpout *info)
95{
96 u16 data = nvbios_dpout_entry(bios, idx, ver, hdr, cnt, len);
97 memset(info, 0x00, sizeof(*info));
98 if (data && *ver) {
99 info->type = nv_ro16(bios, data + 0x00);
100 info->mask = nv_ro16(bios, data + 0x02);
101 switch (*ver) {
102 case 0x21:
103 case 0x30:
104 info->flags = nv_ro08(bios, data + 0x05);
105 info->script[0] = nv_ro16(bios, data + 0x06);
106 info->script[1] = nv_ro16(bios, data + 0x08);
107 info->lnkcmp = nv_ro16(bios, data + 0x0a);
108 if (*len >= 0x0f) {
109 info->script[2] = nv_ro16(bios, data + 0x0c);
110 info->script[3] = nv_ro16(bios, data + 0x0e);
111 }
112 if (*len >= 0x11)
113 info->script[4] = nv_ro16(bios, data + 0x10);
114 break;
115 case 0x40:
116 info->flags = nv_ro08(bios, data + 0x04);
117 info->script[0] = nv_ro16(bios, data + 0x05);
118 info->script[1] = nv_ro16(bios, data + 0x07);
119 info->lnkcmp = nv_ro16(bios, data + 0x09);
120 info->script[2] = nv_ro16(bios, data + 0x0b);
121 info->script[3] = nv_ro16(bios, data + 0x0d);
122 info->script[4] = nv_ro16(bios, data + 0x0f);
123 break;
124 default:
125 data = 0x0000;
126 break;
127 }
128 }
129 return data;
130}
131
132u16
133nvbios_dpout_match(struct nouveau_bios *bios, u16 type, u16 mask,
134 u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
135 struct nvbios_dpout *info)
136{
137 u16 data, idx = 0;
138 while ((data = nvbios_dpout_parse(bios, idx++, ver, hdr, cnt, len, info)) || *ver) {
139 if (data && info->type == type) {
140 if ((info->mask & mask) == mask)
141 break;
142 }
143 }
144 return data;
145}
146
147static u16
148nvbios_dpcfg_entry(struct nouveau_bios *bios, u16 outp, u8 idx,
149 u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
150{
151 if (*ver >= 0x40) {
152 outp = nvbios_dp_table(bios, ver, hdr, cnt, len);
153 *hdr = *hdr + (*len * * cnt);
154 *len = nv_ro08(bios, outp + 0x06);
155 *cnt = nv_ro08(bios, outp + 0x07);
156 }
157
158 if (idx < *cnt)
159 return outp + *hdr + (idx * *len);
160
161 return 0x0000;
162}
163
164u16
165nvbios_dpcfg_parse(struct nouveau_bios *bios, u16 outp, u8 idx,
166 u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
167 struct nvbios_dpcfg *info)
168{
169 u16 data = nvbios_dpcfg_entry(bios, outp, idx, ver, hdr, cnt, len);
170 if (data) {
171 switch (*ver) {
172 case 0x21:
173 info->drv = nv_ro08(bios, data + 0x02);
174 info->pre = nv_ro08(bios, data + 0x03);
175 info->unk = nv_ro08(bios, data + 0x04);
176 break;
177 case 0x30:
178 case 0x40:
179 info->drv = nv_ro08(bios, data + 0x01);
180 info->pre = nv_ro08(bios, data + 0x02);
181 info->unk = nv_ro08(bios, data + 0x03);
182 break;
183 default:
184 data = 0x0000;
185 break;
186 }
187 }
188 return data;
189}
190
191u16
192nvbios_dpcfg_match(struct nouveau_bios *bios, u16 outp, u8 un, u8 vs, u8 pe,
193 u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
194 struct nvbios_dpcfg *info)
195{
196 u8 idx = 0xff;
197 u16 data;
198
199 if (*ver >= 0x30) {
200 const u8 vsoff[] = { 0, 4, 7, 9 };
201 idx = (un * 10) + vsoff[vs] + pe;
202 } else {
203 while ((data = nvbios_dpcfg_entry(bios, outp, idx,
204 ver, hdr, cnt, len))) {
205 if (nv_ro08(bios, data + 0x00) == vs &&
206 nv_ro08(bios, data + 0x01) == pe)
207 break;
208 idx++;
209 }
210 }
211
212 return nvbios_dpcfg_parse(bios, outp, pe, ver, hdr, cnt, len, info);
213}
214