2 * Copyright 2012 Nouveau Community
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
22 * Authors: Martin Peres
24 #include <subdev/bios.h>
25 #include <subdev/bios/bit.h>
26 #include <subdev/bios/volt.h>
29 nvbios_volt_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
31 struct bit_entry bit_P;
34 if (!bit_entry(bios, 'P', &bit_P)) {
35 if (bit_P.version == 2)
36 volt = nvbios_rd16(bios, bit_P.offset + 0x0c);
38 if (bit_P.version == 1)
39 volt = nvbios_rd16(bios, bit_P.offset + 0x10);
42 *ver = nvbios_rd08(bios, volt + 0);
46 *cnt = nvbios_rd08(bios, volt + 2);
47 *len = nvbios_rd08(bios, volt + 1);
50 *hdr = nvbios_rd08(bios, volt + 1);
51 *cnt = nvbios_rd08(bios, volt + 2);
52 *len = nvbios_rd08(bios, volt + 3);
57 *hdr = nvbios_rd08(bios, volt + 1);
58 *cnt = nvbios_rd08(bios, volt + 3);
59 *len = nvbios_rd08(bios, volt + 2);
69 nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
70 struct nvbios_volt *info)
72 u16 volt = nvbios_volt_table(bios, ver, hdr, cnt, len);
73 memset(info, 0x00, sizeof(*info));
74 switch (!!volt * *ver) {
76 info->type = NVBIOS_VOLT_GPIO;
77 info->vidmask = nvbios_rd08(bios, volt + 0x04);
80 info->type = NVBIOS_VOLT_GPIO;
81 info->vidmask = nvbios_rd08(bios, volt + 0x05);
84 info->type = NVBIOS_VOLT_GPIO;
85 info->vidmask = nvbios_rd08(bios, volt + 0x04);
88 info->type = NVBIOS_VOLT_GPIO;
89 info->base = nvbios_rd32(bios, volt + 0x04);
90 info->step = nvbios_rd16(bios, volt + 0x08);
91 info->vidmask = nvbios_rd08(bios, volt + 0x0b);
94 info->max = info->base;
97 info->min = nvbios_rd32(bios, volt + 0x0a);
98 info->max = nvbios_rd32(bios, volt + 0x0e);
99 info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff;
101 /* offset 4 seems to be a flag byte */
102 if (nvbios_rd32(bios, volt + 0x4) & 1) {
103 info->type = NVBIOS_VOLT_PWM;
104 info->pwm_freq = nvbios_rd32(bios, volt + 0x5) / 1000;
105 info->pwm_range = nvbios_rd32(bios, volt + 0x16);
107 info->type = NVBIOS_VOLT_GPIO;
108 info->vidmask = nvbios_rd08(bios, volt + 0x06);
109 info->step = nvbios_rd16(bios, volt + 0x16);
117 nvbios_volt_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
120 u16 volt = nvbios_volt_table(bios, ver, &hdr, &cnt, len);
121 if (volt && idx < cnt) {
122 volt = volt + hdr + (idx * *len);
129 nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
130 struct nvbios_volt_entry *info)
132 u16 volt = nvbios_volt_entry(bios, idx, ver, len);
133 memset(info, 0x00, sizeof(*info));
134 switch (!!volt * *ver) {
137 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000;
138 info->vid = nvbios_rd08(bios, volt + 0x01);
141 info->voltage = nvbios_rd08(bios, volt + 0x00) * 10000;
142 info->vid = nvbios_rd08(bios, volt + 0x01) >> 2;