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