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
25 #include <subdev/bios.h>
26 #include <subdev/bios/bit.h>
27 #include <subdev/bios/therm.h>
30 therm_table(struct nouveau_bios
*bios
, u8
*ver
, u8
*hdr
, u8
*len
, u8
*cnt
)
32 struct bit_entry bit_P
;
35 if (!bit_entry(bios
, 'P', &bit_P
)) {
36 if (bit_P
.version
== 1)
37 therm
= nv_ro16(bios
, bit_P
.offset
+ 12);
38 else if (bit_P
.version
== 2)
39 therm
= nv_ro16(bios
, bit_P
.offset
+ 16);
42 "unknown offset for thermal in BIT P %d\n",
46 /* exit now if we haven't found the thermal table */
50 *ver
= nv_ro08(bios
, therm
+ 0);
51 *hdr
= nv_ro08(bios
, therm
+ 1);
52 *len
= nv_ro08(bios
, therm
+ 2);
53 *cnt
= nv_ro08(bios
, therm
+ 3);
55 return therm
+ nv_ro08(bios
, therm
+ 1);
59 nvbios_therm_entry(struct nouveau_bios
*bios
, int idx
, u8
*ver
, u8
*len
)
62 u16 therm
= therm_table(bios
, ver
, &hdr
, len
, &cnt
);
63 if (therm
&& idx
< cnt
)
64 return therm
+ idx
* *len
;
69 nvbios_therm_sensor_parse(struct nouveau_bios
*bios
,
70 enum nvbios_therm_domain domain
,
71 struct nvbios_therm_sensor
*sensor
)
73 s8 thrs_section
, sensor_section
, offset
;
77 /* we only support the core domain for now */
78 if (domain
!= NVBIOS_THERM_DOMAIN_CORE
)
81 /* Read the entries from the table */
85 while ((entry
= nvbios_therm_entry(bios
, i
++, &ver
, &len
))) {
86 s16 value
= nv_ro16(bios
, entry
+ 1);
88 switch (nv_ro08(bios
, entry
+ 0)) {
92 return 0; /* we do not try to support ambient */
96 if (sensor_section
== 0) {
97 offset
= ((s8
) nv_ro08(bios
, entry
+ 2)) / 2;
98 sensor
->offset_constant
= offset
;
103 if (thrs_section
== 0) {
104 sensor
->thrs_critical
.temp
= (value
& 0xff0) >> 4;
105 sensor
->thrs_critical
.hysteresis
= value
& 0xf;
110 if (thrs_section
== 0) {
111 sensor
->thrs_down_clock
.temp
= (value
& 0xff0) >> 4;
112 sensor
->thrs_down_clock
.hysteresis
= value
& 0xf;
117 if (thrs_section
== 0) {
118 sensor
->thrs_fan_boost
.temp
= (value
& 0xff0) >> 4;
119 sensor
->thrs_fan_boost
.hysteresis
= value
& 0xf;
124 if (sensor_section
== 0)
125 sensor
->offset_num
= value
;
129 if (sensor_section
== 0)
130 sensor
->offset_den
= value
;
134 if (sensor_section
== 0)
135 sensor
->slope_mult
= value
;
139 if (sensor_section
== 0)
140 sensor
->slope_div
= value
;
143 if (thrs_section
== 0) {
144 sensor
->thrs_shutdown
.temp
= (value
& 0xff0) >> 4;
145 sensor
->thrs_shutdown
.hysteresis
= value
& 0xf;
155 nvbios_therm_fan_parse(struct nouveau_bios
*bios
,
156 struct nvbios_therm_fan
*fan
)
158 struct nouveau_therm_trip_point
*cur_trip
= NULL
;
162 uint8_t duty_lut
[] = { 0, 0, 25, 0, 40, 0, 50, 0,
163 75, 0, 85, 0, 100, 0, 100, 0 };
166 fan
->nr_fan_trip
= 0;
167 while ((entry
= nvbios_therm_entry(bios
, i
++, &ver
, &len
))) {
168 s16 value
= nv_ro16(bios
, entry
+ 1);
170 switch (nv_ro08(bios
, entry
+ 0)) {
172 fan
->min_duty
= value
& 0xff;
173 fan
->max_duty
= (value
& 0xff00) >> 8;
177 cur_trip
= &fan
->trip
[fan
->nr_fan_trip
- 1];
178 cur_trip
->hysteresis
= value
& 0xf;
179 cur_trip
->temp
= (value
& 0xff0) >> 4;
180 cur_trip
->fan_duty
= duty_lut
[(value
& 0xf000) >> 12];
183 cur_trip
= &fan
->trip
[fan
->nr_fan_trip
- 1];
184 cur_trip
->fan_duty
= value
;
188 fan
->pwm_freq
= value
;
191 fan
->bump_period
= value
;
194 fan
->slow_down_period
= value
;
197 fan
->linear_min_temp
= nv_ro08(bios
, entry
+ 1);
198 fan
->linear_max_temp
= nv_ro08(bios
, entry
+ 2);