1 /* $NetBSD: nouveau_nvkm_subdev_therm_gp100.c,v 1.2 2021/12/18 23:45:41 riastradh Exp $ */
2
3 /*
4 * Copyright 2017 Rhys Kidd
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: Rhys Kidd
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_therm_gp100.c,v 1.2 2021/12/18 23:45:41 riastradh Exp $");
28
29 #include "priv.h"
30
31 static int
gp100_temp_get(struct nvkm_therm * therm)32 gp100_temp_get(struct nvkm_therm *therm)
33 {
34 struct nvkm_device *device = therm->subdev.device;
35 struct nvkm_subdev *subdev = &therm->subdev;
36 u32 tsensor = nvkm_rd32(device, 0x020460);
37 u32 inttemp = (tsensor & 0x0001fff8);
38
39 /* device SHADOWed */
40 if (tsensor & 0x40000000)
41 nvkm_trace(subdev, "reading temperature from SHADOWed sensor\n");
42
43 /* device valid */
44 if (tsensor & 0x20000000)
45 return (inttemp >> 8);
46 else
47 return -ENODEV;
48 }
49
50 static const struct nvkm_therm_func
51 gp100_therm = {
52 .temp_get = gp100_temp_get,
53 .program_alarms = nvkm_therm_program_alarms_polling,
54 };
55
56 int
gp100_therm_new(struct nvkm_device * device,int index,struct nvkm_therm ** ptherm)57 gp100_therm_new(struct nvkm_device *device, int index,
58 struct nvkm_therm **ptherm)
59 {
60 return nvkm_therm_new_(&gp100_therm, device, index, ptherm);
61 }
62