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      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
     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
     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