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 |
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 |
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 |
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 |
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 | |