1 /* $NetBSD: nouveau_subdev_bios_therm.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_therm.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/therm.h>
33
34 static u16
therm_table(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * len,u8 * cnt)35 therm_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt)
36 {
37 struct bit_entry bit_P;
38 u16 therm = 0;
39
40 if (!bit_entry(bios, 'P', &bit_P)) {
41 if (bit_P.version == 1)
42 therm = nv_ro16(bios, bit_P.offset + 12);
43 else if (bit_P.version == 2)
44 therm = nv_ro16(bios, bit_P.offset + 16);
45 else
46 nv_error(bios,
47 "unknown offset for thermal in BIT P %d\n",
48 bit_P.version);
49 }
50
51 /* exit now if we haven't found the thermal table */
52 if (!therm)
53 return 0x0000;
54
55 *ver = nv_ro08(bios, therm + 0);
56 *hdr = nv_ro08(bios, therm + 1);
57 *len = nv_ro08(bios, therm + 2);
58 *cnt = nv_ro08(bios, therm + 3);
59
60 return therm + nv_ro08(bios, therm + 1);
61 }
62
63 static u16
nvbios_therm_entry(struct nouveau_bios * bios,int idx,u8 * ver,u8 * len)64 nvbios_therm_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *len)
65 {
66 u8 hdr, cnt;
67 u16 therm = therm_table(bios, ver, &hdr, len, &cnt);
68 if (therm && idx < cnt)
69 return therm + idx * *len;
70 return 0x0000;
71 }
72
73 int
nvbios_therm_sensor_parse(struct nouveau_bios * bios,enum nvbios_therm_domain domain,struct nvbios_therm_sensor * sensor)74 nvbios_therm_sensor_parse(struct nouveau_bios *bios,
75 enum nvbios_therm_domain domain,
76 struct nvbios_therm_sensor *sensor)
77 {
78 s8 thrs_section, sensor_section, offset;
79 u8 ver, len, i;
80 u16 entry;
81
82 /* we only support the core domain for now */
83 if (domain != NVBIOS_THERM_DOMAIN_CORE)
84 return -EINVAL;
85
86 /* Read the entries from the table */
87 thrs_section = 0;
88 sensor_section = -1;
89 i = 0;
90 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
91 s16 value = nv_ro16(bios, entry + 1);
92
93 switch (nv_ro08(bios, entry + 0)) {
94 case 0x0:
95 thrs_section = value;
96 if (value > 0)
97 return 0; /* we do not try to support ambient */
98 break;
99 case 0x01:
100 sensor_section++;
101 if (sensor_section == 0) {
102 offset = ((s8) nv_ro08(bios, entry + 2)) / 2;
103 sensor->offset_constant = offset;
104 }
105 break;
106
107 case 0x04:
108 if (thrs_section == 0) {
109 sensor->thrs_critical.temp = (value & 0xff0) >> 4;
110 sensor->thrs_critical.hysteresis = value & 0xf;
111 }
112 break;
113
114 case 0x07:
115 if (thrs_section == 0) {
116 sensor->thrs_down_clock.temp = (value & 0xff0) >> 4;
117 sensor->thrs_down_clock.hysteresis = value & 0xf;
118 }
119 break;
120
121 case 0x08:
122 if (thrs_section == 0) {
123 sensor->thrs_fan_boost.temp = (value & 0xff0) >> 4;
124 sensor->thrs_fan_boost.hysteresis = value & 0xf;
125 }
126 break;
127
128 case 0x10:
129 if (sensor_section == 0)
130 sensor->offset_num = value;
131 break;
132
133 case 0x11:
134 if (sensor_section == 0)
135 sensor->offset_den = value;
136 break;
137
138 case 0x12:
139 if (sensor_section == 0)
140 sensor->slope_mult = value;
141 break;
142
143 case 0x13:
144 if (sensor_section == 0)
145 sensor->slope_div = value;
146 break;
147 case 0x32:
148 if (thrs_section == 0) {
149 sensor->thrs_shutdown.temp = (value & 0xff0) >> 4;
150 sensor->thrs_shutdown.hysteresis = value & 0xf;
151 }
152 break;
153 }
154 }
155
156 return 0;
157 }
158
159 int
nvbios_therm_fan_parse(struct nouveau_bios * bios,struct nvbios_therm_fan * fan)160 nvbios_therm_fan_parse(struct nouveau_bios *bios,
161 struct nvbios_therm_fan *fan)
162 {
163 struct nouveau_therm_trip_point *cur_trip = NULL;
164 u8 ver, len, i;
165 u16 entry;
166
167 uint8_t duty_lut[] = { 0, 0, 25, 0, 40, 0, 50, 0,
168 75, 0, 85, 0, 100, 0, 100, 0 };
169
170 i = 0;
171 fan->nr_fan_trip = 0;
172 fan->fan_mode = NVBIOS_THERM_FAN_OTHER;
173 while ((entry = nvbios_therm_entry(bios, i++, &ver, &len))) {
174 s16 value = nv_ro16(bios, entry + 1);
175
176 switch (nv_ro08(bios, entry + 0)) {
177 case 0x22:
178 fan->min_duty = value & 0xff;
179 fan->max_duty = (value & 0xff00) >> 8;
180 break;
181 case 0x24:
182 fan->nr_fan_trip++;
183 if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP)
184 fan->fan_mode = NVBIOS_THERM_FAN_TRIP;
185 cur_trip = &fan->trip[fan->nr_fan_trip - 1];
186 cur_trip->hysteresis = value & 0xf;
187 cur_trip->temp = (value & 0xff0) >> 4;
188 cur_trip->fan_duty = duty_lut[(value & 0xf000) >> 12];
189 break;
190 case 0x25:
191 cur_trip = &fan->trip[fan->nr_fan_trip - 1];
192 cur_trip->fan_duty = value;
193 break;
194 case 0x26:
195 if (!fan->pwm_freq)
196 fan->pwm_freq = value;
197 break;
198 case 0x3b:
199 fan->bump_period = value;
200 break;
201 case 0x3c:
202 fan->slow_down_period = value;
203 break;
204 case 0x46:
205 if (fan->fan_mode > NVBIOS_THERM_FAN_LINEAR)
206 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
207 fan->linear_min_temp = nv_ro08(bios, entry + 1);
208 fan->linear_max_temp = nv_ro08(bios, entry + 2);
209 break;
210 }
211 }
212
213 /* starting from fermi, fan management is always linear */
214 if (nv_device(bios)->card_type >= NV_C0 &&
215 fan->fan_mode == NVBIOS_THERM_FAN_OTHER) {
216 fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
217 }
218
219 return 0;
220 }
221