1 /*
2 * Copyright 2012 Nouveau Community
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: Martin Peres
23 */
24 #include <subdev/bios.h>
25 #include <subdev/bios/bit.h>
26 #include <subdev/bios/volt.h>
27
28 u32
nvbios_volt_table(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)29 nvbios_volt_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
30 {
31 struct bit_entry bit_P;
32 u32 volt = 0;
33
34 if (!bit_entry(bios, 'P', &bit_P)) {
35 if (bit_P.version == 2)
36 volt = nvbios_rd32(bios, bit_P.offset + 0x0c);
37 else
38 if (bit_P.version == 1)
39 volt = nvbios_rd32(bios, bit_P.offset + 0x10);
40
41 if (volt) {
42 *ver = nvbios_rd08(bios, volt + 0);
43 switch (*ver) {
44 case 0x12:
45 *hdr = 5;
46 *cnt = nvbios_rd08(bios, volt + 2);
47 *len = nvbios_rd08(bios, volt + 1);
48 return volt;
49 case 0x20:
50 *hdr = nvbios_rd08(bios, volt + 1);
51 *cnt = nvbios_rd08(bios, volt + 2);
52 *len = nvbios_rd08(bios, volt + 3);
53 return volt;
54 case 0x30:
55 case 0x40:
56 case 0x50:
57 *hdr = nvbios_rd08(bios, volt + 1);
58 *cnt = nvbios_rd08(bios, volt + 3);
59 *len = nvbios_rd08(bios, volt + 2);
60 return volt;
61 }
62 }
63 }
64
65 return 0;
66 }
67
68 u32
nvbios_volt_parse(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_volt * info)69 nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
70 struct nvbios_volt *info)
71 {
72 u32 volt = nvbios_volt_table(bios, ver, hdr, cnt, len);
73 memset(info, 0x00, sizeof(*info));
74 switch (!!volt * *ver) {
75 case 0x12:
76 info->type = NVBIOS_VOLT_GPIO;
77 info->vidmask = nvbios_rd08(bios, volt + 0x04);
78 info->ranged = false;
79 break;
80 case 0x20:
81 info->type = NVBIOS_VOLT_GPIO;
82 info->vidmask = nvbios_rd08(bios, volt + 0x05);
83 info->ranged = false;
84 break;
85 case 0x30:
86 info->type = NVBIOS_VOLT_GPIO;
87 info->vidmask = nvbios_rd08(bios, volt + 0x04);
88 info->ranged = false;
89 break;
90 case 0x40:
91 info->type = NVBIOS_VOLT_GPIO;
92 info->base = nvbios_rd32(bios, volt + 0x04);
93 info->step = nvbios_rd16(bios, volt + 0x08);
94 info->vidmask = nvbios_rd08(bios, volt + 0x0b);
95 info->ranged = true; /* XXX: find the flag byte */
96 info->min = min(info->base,
97 info->base + info->step * info->vidmask);
98 info->max = nvbios_rd32(bios, volt + 0x0e);
99 if (!info->max)
100 info->max = max(info->base, info->base + info->step * info->vidmask);
101 break;
102 case 0x50:
103 info->min = nvbios_rd32(bios, volt + 0x0a);
104 info->max = nvbios_rd32(bios, volt + 0x0e);
105 info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff;
106
107 /* offset 4 seems to be a flag byte */
108 if (nvbios_rd32(bios, volt + 0x4) & 1) {
109 info->type = NVBIOS_VOLT_PWM;
110 info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000;
111 info->pwm_range = nvbios_rd32(bios, volt + 0x16);
112 } else {
113 info->type = NVBIOS_VOLT_GPIO;
114 info->vidmask = nvbios_rd08(bios, volt + 0x06);
115 info->step = nvbios_rd16(bios, volt + 0x16);
116 info->ranged =
117 !!(nvbios_rd08(bios, volt + 0x4) & 0x2);
118 }
119 break;
120 }
121 return volt;
122 }
123
124 u32
nvbios_volt_entry(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len)125 nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
126 {
127 u8 hdr, cnt;
128 u32 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len);
129 if (volt && idx < cnt) {
130 volt = volt + hdr + (idx * *len);
131 return volt;
132 }
133 return 0;
134 }
135
136 u32
nvbios_volt_entry_parse(struct nvkm_bios * bios,int idx,u8 * ver,u8 * len,struct nvbios_volt_entry * info)137 nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
138 struct nvbios_volt_entry *info)
139 {
140 u32 volt = nvbios_volt_entry(bios, idx, ver, len);
141 memset(info, 0x00, sizeof(*info));
142 switch (!!volt * *ver) {
143 case 0x12:
144 case 0x20:
145 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000;
146 info->vid = nvbios_rd08(bios, volt + 0x01);
147 break;
148 case 0x30:
149 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000;
150 info->vid = nvbios_rd08(bios, volt + 0x01) >> 2;
151 break;
152 case 0x40:
153 break;
154 case 0x50:
155 info->voltage = nvbios_rd32(bios, volt) & 0x001fffff;
156 info->vid = (nvbios_rd32(bios, volt) >> 23) & 0xff;
157 break;
158 }
159 return volt;
160 }
161