1 /*
2 * Copyright 2014 Martin Peres
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
25 #include <subdev/bios.h>
26 #include <subdev/bios/bit.h>
27 #include <subdev/bios/fan.h>
28
29 u16
nvbios_fan_table(struct nouveau_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)30 nvbios_fan_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
31 {
32 struct bit_entry bit_P;
33 u16 fan = 0x0000;
34
35 if (!bit_entry(bios, 'P', &bit_P)) {
36 if (bit_P.version == 2 && bit_P.length >= 0x5a)
37 fan = nv_ro16(bios, bit_P.offset + 0x58);
38
39 if (fan) {
40 *ver = nv_ro08(bios, fan + 0);
41 switch (*ver) {
42 case 0x10:
43 *hdr = nv_ro08(bios, fan + 1);
44 *len = nv_ro08(bios, fan + 2);
45 *cnt = nv_ro08(bios, fan + 3);
46 return fan;
47 default:
48 break;
49 }
50 }
51 }
52
53 return 0x0000;
54 }
55
56 u16
nvbios_fan_entry(struct nouveau_bios * bios,int idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)57 nvbios_fan_entry(struct nouveau_bios *bios, int idx, u8 *ver, u8 *hdr,
58 u8 *cnt, u8 *len)
59 {
60 u16 data = nvbios_fan_table(bios, ver, hdr, cnt, len);
61 if (data && idx < *cnt)
62 return data + *hdr + (idx * (*len));
63 return 0x0000;
64 }
65
66 u16
nvbios_fan_parse(struct nouveau_bios * bios,struct nvbios_therm_fan * fan)67 nvbios_fan_parse(struct nouveau_bios *bios, struct nvbios_therm_fan *fan)
68 {
69 u8 ver, hdr, cnt, len;
70
71 u16 data = nvbios_fan_entry(bios, 0, &ver, &hdr, &cnt, &len);
72 if (data) {
73 u8 type = nv_ro08(bios, data + 0x00);
74 switch (type) {
75 case 0:
76 fan->type = NVBIOS_THERM_FAN_TOGGLE;
77 break;
78 case 1:
79 case 2:
80 /* TODO: Understand the difference between the two! */
81 fan->type = NVBIOS_THERM_FAN_PWM;
82 break;
83 default:
84 fan->type = NVBIOS_THERM_FAN_UNK;
85 }
86
87 fan->min_duty = nv_ro08(bios, data + 0x02);
88 fan->max_duty = nv_ro08(bios, data + 0x03);
89
90 fan->pwm_freq = nv_ro32(bios, data + 0x0b) & 0xffffff;
91 }
92 return data;
93 }
94