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
28int
29gt215_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
39static void
40gt215_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
57static const struct nvkm_therm_func
58gt215_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
70int
71gt215_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