cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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gt215.c (2559B)

      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, enum nvkm_subdev_type type, int inst,
     72		struct nvkm_therm **ptherm)
     73{
     74	return nvkm_therm_new_(&gt215_therm, device, type, inst, ptherm);
     75}