summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/nouveau/nvkm/subdev/therm/nv40.c
blob: 2c92ffb5f9d0623dd850d42c202110173ac2647e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 * 	    Martin Peres
 */
#include "priv.h"

enum nv40_sensor_style { INVALID_STYLE = -1, OLD_STYLE = 0, NEW_STYLE = 1 };

static enum nv40_sensor_style
nv40_sensor_style(struct nvkm_therm *therm)
{
	switch (therm->subdev.device->chipset) {
	case 0x43:
	case 0x44:
	case 0x4a:
	case 0x47:
		return OLD_STYLE;
	case 0x46:
	case 0x49:
	case 0x4b:
	case 0x4e:
	case 0x4c:
	case 0x67:
	case 0x68:
	case 0x63:
		return NEW_STYLE;
	default:
		return INVALID_STYLE;
	}
}

static int
nv40_sensor_setup(struct nvkm_therm *therm)
{
	struct nvkm_device *device = therm->subdev.device;
	enum nv40_sensor_style style = nv40_sensor_style(therm);

	/* enable ADC readout and disable the ALARM threshold */
	if (style == NEW_STYLE) {
		nvkm_mask(device, 0x15b8, 0x80000000, 0);
		nvkm_wr32(device, 0x15b0, 0x80003fff);
		mdelay(20); /* wait for the temperature to stabilize */
		return nvkm_rd32(device, 0x15b4) & 0x3fff;
	} else if (style == OLD_STYLE) {
		nvkm_wr32(device, 0x15b0, 0xff);
		mdelay(20); /* wait for the temperature to stabilize */
		return nvkm_rd32(device, 0x15b4) & 0xff;
	} else
		return -ENODEV;
}

static int
nv40_temp_get(struct nvkm_therm *therm)
{
	struct nvkm_device *device = therm->subdev.device;
	struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
	enum nv40_sensor_style style = nv40_sensor_style(therm);
	int core_temp;

	if (style == NEW_STYLE) {
		nvkm_wr32(device, 0x15b0, 0x80003fff);
		core_temp = nvkm_rd32(device, 0x15b4) & 0x3fff;
	} else if (style == OLD_STYLE) {
		nvkm_wr32(device, 0x15b0, 0xff);
		core_temp = nvkm_rd32(device, 0x15b4) & 0xff;
	} else
		return -ENODEV;

	/* if the slope or the offset is unset, do no use the sensor */
	if (!sensor->slope_div || !sensor->slope_mult ||
	    !sensor->offset_num || !sensor->offset_den)
	    return -ENODEV;

	core_temp = core_temp * sensor->slope_mult / sensor->slope_div;
	core_temp = core_temp + sensor->offset_num / sensor->offset_den;
	core_temp = core_temp + sensor->offset_constant - 8;

	/* reserve negative temperatures for errors */
	if (core_temp < 0)
		core_temp = 0;

	return core_temp;
}

static int
nv40_fan_pwm_ctrl(struct nvkm_therm *therm, int line, bool enable)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	struct nvkm_device *device = subdev->device;
	u32 mask = enable ? 0x80000000 : 0x00000000;
	if      (line == 2) nvkm_mask(device, 0x0010f0, 0x80000000, mask);
	else if (line == 9) nvkm_mask(device, 0x0015f4, 0x80000000, mask);
	else {
		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
		return -ENODEV;
	}
	return 0;
}

static int
nv40_fan_pwm_get(struct nvkm_therm *therm, int line, u32 *divs, u32 *duty)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	struct nvkm_device *device = subdev->device;
	if (line == 2) {
		u32 reg = nvkm_rd32(device, 0x0010f0);
		if (reg & 0x80000000) {
			*duty = (reg & 0x7fff0000) >> 16;
			*divs = (reg & 0x00007fff);
			return 0;
		}
	} else
	if (line == 9) {
		u32 reg = nvkm_rd32(device, 0x0015f4);
		if (reg & 0x80000000) {
			*divs = nvkm_rd32(device, 0x0015f8);
			*duty = (reg & 0x7fffffff);
			return 0;
		}
	} else {
		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
		return -ENODEV;
	}

	return -EINVAL;
}

static int
nv40_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	struct nvkm_device *device = subdev->device;
	if (line == 2) {
		nvkm_mask(device, 0x0010f0, 0x7fff7fff, (duty << 16) | divs);
	} else
	if (line == 9) {
		nvkm_wr32(device, 0x0015f8, divs);
		nvkm_mask(device, 0x0015f4, 0x7fffffff, duty);
	} else {
		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
		return -ENODEV;
	}

	return 0;
}

void
nv40_therm_intr(struct nvkm_therm *therm)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	struct nvkm_device *device = subdev->device;
	uint32_t stat = nvkm_rd32(device, 0x1100);

	/* traitement */

	/* ack all IRQs */
	nvkm_wr32(device, 0x1100, 0x70000);

	nvkm_error(subdev, "THERM received an IRQ: stat = %x\n", stat);
}

static void
nv40_therm_init(struct nvkm_therm *therm)
{
	nv40_sensor_setup(therm);
}

static const struct nvkm_therm_func
nv40_therm = {
	.init = nv40_therm_init,
	.intr = nv40_therm_intr,
	.pwm_ctrl = nv40_fan_pwm_ctrl,
	.pwm_get = nv40_fan_pwm_get,
	.pwm_set = nv40_fan_pwm_set,
	.temp_get = nv40_temp_get,
	.program_alarms = nvkm_therm_program_alarms_polling,
};

int
nv40_therm_new(struct nvkm_device *device, int index,
	       struct nvkm_therm **ptherm)
{
	return nvkm_therm_new_(&nv40_therm, device, index, ptherm);
}