1/* $NetBSD: nouveau_subdev_bios_volt.c,v 1.1.1.1 2014/08/06 12:36:29 riastradh Exp $ */
2
3/*
4 * Copyright 2012 Nouveau Community
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: Martin Peres
25 */
26
27#include <sys/cdefs.h>
28__KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_bios_volt.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/volt.h>
33
34u16
35nvbios_volt_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
36{
37 struct bit_entry bit_P;
38 u16 volt = 0x0000;
39
40 if (!bit_entry(bios, 'P', &bit_P)) {
41 if (bit_P.version == 2)
42 volt = nv_ro16(bios, bit_P.offset + 0x0c);
43 else
44 if (bit_P.version == 1)
45 volt = nv_ro16(bios, bit_P.offset + 0x10);
46
47 if (volt) {
48 *ver = nv_ro08(bios, volt + 0);
49 switch (*ver) {
50 case 0x12:
51 *hdr = 5;
52 *cnt = nv_ro08(bios, volt + 2);
53 *len = nv_ro08(bios, volt + 1);
54 return volt;
55 case 0x20:
56 *hdr = nv_ro08(bios, volt + 1);
57 *cnt = nv_ro08(bios, volt + 2);
58 *len = nv_ro08(bios, volt + 3);
59 return volt;
60 case 0x30:
61 case 0x40:
62 case 0x50:
63 *hdr = nv_ro08(bios, volt + 1);
64 *cnt = nv_ro08(bios, volt + 3);
65 *len = nv_ro08(bios, volt + 2);
66 return volt;
67 }
68 }
69 }
70
71 return 0x0000;
72}
73
74u16
75nvbios_volt_parse(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
76 struct nvbios_volt *info)
77{
78 u16 volt = nvbios_volt_table(bios, ver, hdr, cnt, len);
79 memset(info, 0x00, sizeof(*info));
80 switch (!!volt * *ver) {
81 case 0x12:
82 info->vidmask = nv_ro08(bios, volt + 0x04);
83 break;
84 case 0x20:
85 info->vidmask = nv_ro08(bios, volt + 0x05);
86 break;
87 case 0x30:
88 info->vidmask = nv_ro08(bios, volt + 0x04);
89 break;
90 case 0x40:
91 info->base = nv_ro32(bios, volt + 0x04);
92 info->step = nv_ro16(bios, volt + 0x08);
93 info->vidmask = nv_ro08(bios, volt + 0x0b);
94 /*XXX*/
95 info->min = 0;
96 info->max = info->base;
97 break;
98 case 0x50:
99 info->vidmask = nv_ro08(bios, volt + 0x06);
100 info->min = nv_ro32(bios, volt + 0x0a);
101 info->max = nv_ro32(bios, volt + 0x0e);
102 info->base = nv_ro32(bios, volt + 0x12) & 0x00ffffff;
103 info->step = nv_ro16(bios, volt + 0x16);
104 break;
105 }
106 return volt;
107}
108
109u16
110nvbios_volt_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len)
111{
112 u8 hdr, cnt;
113 u16 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len);
114 if (volt && idx < cnt) {
115 volt = volt + hdr + (idx * *len);
116 return volt;
117 }
118 return 0x0000;
119}
120
121u16
122nvbios_volt_entry_parse(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len,
123 struct nvbios_volt_entry *info)
124{
125 u16 volt = nvbios_volt_entry(bios, idx, ver, len);
126 memset(info, 0x00, sizeof(*info));
127 switch (!!volt * *ver) {
128 case 0x12:
129 case 0x20:
130 info->voltage = nv_ro08(bios, volt + 0x00) * 10000;
131 info->vid = nv_ro08(bios, volt + 0x01);
132 break;
133 case 0x30:
134 info->voltage = nv_ro08(bios, volt + 0x00) * 10000;
135 info->vid = nv_ro08(bios, volt + 0x01) >> 2;
136 break;
137 case 0x40:
138 case 0x50:
139 break;
140 }
141 return volt;
142}
143