/*
* Copyright 2012 Red Hat Inc .
*
* Permission is hereby granted , free of charge , to any person obtaining a
* copy of this software and associated documentation files ( the " Software " ) ,
* to deal in the Software without restriction , including without limitation
* the rights to use , copy , modify , merge , publish , distribute , sublicense ,
* and / or sell copies of the Software , and to permit persons to whom the
* Software is furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL
* THE COPYRIGHT HOLDER ( S ) OR AUTHOR ( S ) BE LIABLE FOR ANY CLAIM , DAMAGES OR
* OTHER LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE ,
* ARISING FROM , OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE .
*
* Authors : Ben Skeggs
* Martin Peres
*/
#include "priv.h"
#include <core/option.h>
#include <subdev/bios.h>
#include <subdev/bios/fan.h>
#include <subdev/gpio.h>
struct nvkm_fanpwm {
struct nvkm_fan base;
struct dcb_gpio_func func;
};
static int
nvkm_fanpwm_get(struct nvkm_therm *therm)
{
struct nvkm_fanpwm *fan = (void *)therm->fan;
struct nvkm_device *device = therm->subdev.device;
struct nvkm_gpio *gpio = device->gpio;
int card_type = device->card_type;
u32 divs, duty;
int ret;
ret = therm->func->pwm_get(therm, fan->func.line, &divs, &duty);
if (ret == 0 && divs) {
divs = max(divs, duty);
if (card_type <= NV_40 || (fan->func.log[0 ] & 1 ))
duty = divs - duty;
return (duty * 100 ) / divs;
}
return nvkm_gpio_get(gpio, 0 , fan->func.func, fan->func.line) * 100 ;
}
static int
nvkm_fanpwm_set(struct nvkm_therm *therm, int percent)
{
struct nvkm_fanpwm *fan = (void *)therm->fan;
int card_type = therm->subdev.device->card_type;
u32 divs, duty;
int ret;
divs = fan->base.perf.pwm_divisor;
if (fan->base.bios.pwm_freq) {
divs = 1 ;
if (therm->func->pwm_clock)
divs = therm->func->pwm_clock(therm, fan->func.line);
divs /= fan->base.bios.pwm_freq;
}
duty = ((divs * percent) + 99 ) / 100 ;
if (card_type <= NV_40 || (fan->func.log[0 ] & 1 ))
duty = divs - duty;
ret = therm->func->pwm_set(therm, fan->func.line, divs, duty);
if (ret == 0 )
ret = therm->func->pwm_ctrl(therm, fan->func.line, true );
return ret;
}
int
nvkm_fanpwm_create(struct nvkm_therm *therm, struct dcb_gpio_func *func)
{
struct nvkm_device *device = therm->subdev.device;
struct nvkm_bios *bios = device->bios;
struct nvkm_fanpwm *fan;
struct nvbios_therm_fan info = {};
u32 divs, duty;
nvbios_fan_parse(bios, &info);
if (!nvkm_boolopt(device->cfgopt, "NvFanPWM" , func->param) ||
!therm->func->pwm_ctrl || info.type == NVBIOS_THERM_FAN_TOGGLE ||
therm->func->pwm_get(therm, func->line, &divs, &duty) == -ENODEV)
return -ENODEV;
fan = kzalloc(sizeof (*fan), GFP_KERNEL);
if (!fan)
return -ENOMEM;
therm->fan = &fan->base;
fan->base.type = "PWM" ;
fan->base.get = nvkm_fanpwm_get;
fan->base.set = nvkm_fanpwm_set;
fan->func = *func;
return 0 ;
}
Messung V0.5 in Prozent C=100 H=100 G=100
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-10-06)
¤
*© Formatika GbR, Deutschland