1 /* $NetBSD: nouveau_nvkm_subdev_therm_nv50.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
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: Ben Skeggs
25 * Martin Peres
26 */
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_therm_nv50.c,v 1.3 2021/12/18 23:45:41 riastradh Exp $");
29
30 #include "priv.h"
31
32 static int
pwm_info(struct nvkm_therm * therm,int * line,int * ctrl,int * indx)33 pwm_info(struct nvkm_therm *therm, int *line, int *ctrl, int *indx)
34 {
35 struct nvkm_subdev *subdev = &therm->subdev;
36
37 if (*line == 0x04) {
38 *ctrl = 0x00e100;
39 *line = 4;
40 *indx = 0;
41 } else
42 if (*line == 0x09) {
43 *ctrl = 0x00e100;
44 *line = 9;
45 *indx = 1;
46 } else
47 if (*line == 0x10) {
48 *ctrl = 0x00e28c;
49 *line = 0;
50 *indx = 0;
51 } else {
52 nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", *line);
53 return -ENODEV;
54 }
55
56 return 0;
57 }
58
59 int
nv50_fan_pwm_ctrl(struct nvkm_therm * therm,int line,bool enable)60 nv50_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
61 {
62 struct nvkm_device *device = therm->subdev.device;
63 u32 data = enable ? 0x00000001 : 0x00000000;
64 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
65 if (ret == 0)
66 nvkm_mask(device, ctrl, 0x00010001 << line, data << line);
67 return ret;
68 }
69
70 int
nv50_fan_pwm_get(struct nvkm_therm * therm,int line,u32 * divs,u32 * duty)71 nv50_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
72 {
73 struct nvkm_device *device = therm->subdev.device;
74 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
75 if (ret)
76 return ret;
77
78 if (nvkm_rd32(device, ctrl) & (1 << line)) {
79 *divs = nvkm_rd32(device, 0x00e114 + (id * 8));
80 *duty = nvkm_rd32(device, 0x00e118 + (id * 8));
81 return 0;
82 }
83
84 return -EINVAL;
85 }
86
87 int
nv50_fan_pwm_set(struct nvkm_therm * therm,int line,u32 divs,u32 duty)88 nv50_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
89 {
90 struct nvkm_device *device = therm->subdev.device;
91 int ctrl, id, ret = pwm_info(therm, &line, &ctrl, &id);
92 if (ret)
93 return ret;
94
95 nvkm_wr32(device, 0x00e114 + (id * 8), divs);
96 nvkm_wr32(device, 0x00e118 + (id * 8), duty | 0x80000000);
97 return 0;
98 }
99
100 int
nv50_fan_pwm_clock(struct nvkm_therm * therm,int line)101 nv50_fan_pwm_clock(struct nvkm_therm *therm, int line)
102 {
103 struct nvkm_device *device = therm->subdev.device;
104 int pwm_clock;
105
106 /* determine the PWM source clock */
107 if (device->chipset > 0x50 && device->chipset < 0x94) {
108 u8 pwm_div = nvkm_rd32(device, 0x410c);
109 if (nvkm_rd32(device, 0xc040) & 0x800000) {
110 /* Use the HOST clock (100 MHz)
111 * Where does this constant(2.4) comes from? */
112 pwm_clock = (100000000 >> pwm_div) * 10 / 24;
113 } else {
114 /* Where does this constant(20) comes from? */
115 pwm_clock = (device->crystal * 1000) >> pwm_div;
116 pwm_clock /= 20;
117 }
118 } else {
119 pwm_clock = (device->crystal * 1000) / 20;
120 }
121
122 return pwm_clock;
123 }
124
125 static void
nv50_sensor_setup(struct nvkm_therm * therm)126 nv50_sensor_setup(struct nvkm_therm *therm)
127 {
128 struct nvkm_device *device = therm->subdev.device;
129 nvkm_mask(device, 0x20010, 0x40000000, 0x0);
130 mdelay(20); /* wait for the temperature to stabilize */
131 }
132
133 static int
nv50_temp_get(struct nvkm_therm * therm)134 nv50_temp_get(struct nvkm_therm *therm)
135 {
136 struct nvkm_device *device = therm->subdev.device;
137 struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
138 int core_temp;
139
140 core_temp = nvkm_rd32(device, 0x20014) & 0x3fff;
141
142 /* if the slope or the offset is unset, do no use the sensor */
143 if (!sensor->slope_div || !sensor->slope_mult ||
144 !sensor->offset_num || !sensor->offset_den)
145 return -ENODEV;
146
147 core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
148 core_temp = core_temp + sensor->offset_num / sensor->offset_den;
149 core_temp = core_temp + sensor->offset_constant - 8;
150
151 /* reserve negative temperatures for errors */
152 if (core_temp < 0)
153 core_temp = 0;
154
155 return core_temp;
156 }
157
158 static void
nv50_therm_init(struct nvkm_therm * therm)159 nv50_therm_init(struct nvkm_therm *therm)
160 {
161 nv50_sensor_setup(therm);
162 }
163
164 static const struct nvkm_therm_func
165 nv50_therm = {
166 .init = nv50_therm_init,
167 .intr = nv40_therm_intr,
168 .pwm_ctrl = nv50_fan_pwm_ctrl,
169 .pwm_get = nv50_fan_pwm_get,
170 .pwm_set = nv50_fan_pwm_set,
171 .pwm_clock = nv50_fan_pwm_clock,
172 .temp_get = nv50_temp_get,
173 .program_alarms = nvkm_therm_program_alarms_polling,
174 };
175
176 int
nv50_therm_new(struct nvkm_device * device,int index,struct nvkm_therm ** ptherm)177 nv50_therm_new(struct nvkm_device *device, int index,
178 struct nvkm_therm **ptherm)
179 {
180 return nvkm_therm_new_(&nv50_therm, device, index, ptherm);
181 }
182