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  */
24 #include "priv.h"
25 
26 #include <subdev/gpio.h>
27 
28 int
29 gt215_therm_fan_sense(struct nvkm_therm *therm)
30 {
31 	struct nvkm_device *device = therm->subdev.device;
32 	u32 tach = nvkm_rd32(device, 0x00e728) & 0x0000ffff;
33 	u32 ctrl = nvkm_rd32(device, 0x00e720);
34 	if (ctrl & 0x00000001)
35 		return tach * 60 / 2;
36 	return -ENODEV;
37 }
38 
39 static void
40 gt215_therm_init(struct nvkm_therm *therm)
41 {
42 	struct nvkm_device *device = therm->subdev.device;
43 	struct dcb_gpio_func *tach = &therm->fan->tach;
44 
45 	g84_sensor_setup(therm);
46 
47 	/* enable fan tach, count revolutions per-second */
48 	nvkm_mask(device, 0x00e720, 0x00000003, 0x00000002);
49 	if (tach->func != DCB_GPIO_UNUSED) {
50 		nvkm_wr32(device, 0x00e724, device->crystal * 1000);
51 		nvkm_mask(device, 0x00e720, 0x001f0000, tach->line << 16);
52 		nvkm_mask(device, 0x00e720, 0x00000001, 0x00000001);
53 	}
54 	nvkm_mask(device, 0x00e720, 0x00000002, 0x00000000);
55 }
56 
57 static const struct nvkm_therm_func
58 gt215_therm = {
59 	.init = gt215_therm_init,
60 	.fini = g84_therm_fini,
61 	.pwm_ctrl = nv50_fan_pwm_ctrl,
62 	.pwm_get = nv50_fan_pwm_get,
63 	.pwm_set = nv50_fan_pwm_set,
64 	.pwm_clock = nv50_fan_pwm_clock,
65 	.temp_get = g84_temp_get,
66 	.fan_sense = gt215_therm_fan_sense,
67 	.program_alarms = nvkm_therm_program_alarms_polling,
68 };
69 
70 int
71 gt215_therm_new(struct nvkm_device *device, int index,
72 	       struct nvkm_therm **ptherm)
73 {
74 	return nvkm_therm_new_(&gt215_therm, device, index, ptherm);
75 }
76