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hekate/nyx/nyx_gui/thermal/fan.c
2019-09-12 23:08:38 +03:00

99 lines
2.8 KiB
C

/*
* Fan driver for Nintendo Switch
*
* Copyright (c) 2018 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "fan.h"
#include "../gfx/gfx.h"
#include "../soc/gpio.h"
#include "../soc/pinmux.h"
#include "../soc/t210.h"
#include "../utils/util.h"
bool fan_init = false;
void set_fan_duty(u32 duty)
{
if (!fan_init)
{
// Fan power from internal 5V regulator (battery).
PINMUX_AUX(PINMUX_AUX_SATA_LED_ACTIVE) = 3;
gpio_config(GPIO_PORT_A, GPIO_PIN_5, GPIO_MODE_GPIO);
gpio_output_enable(GPIO_PORT_A, GPIO_PIN_5, GPIO_OUTPUT_ENABLE);
gpio_write(GPIO_PORT_A, GPIO_PIN_5, GPIO_HIGH);
// Fan power from USB 5V vdd.
PINMUX_AUX(PINMUX_AUX_USB_VBUS_EN0) = 3;
gpio_config(GPIO_PORT_CC, GPIO_PIN_4, GPIO_MODE_GPIO);
gpio_output_enable(GPIO_PORT_CC, GPIO_PIN_4, GPIO_OUTPUT_ENABLE);
gpio_write(GPIO_PORT_CC, GPIO_PIN_4, GPIO_HIGH);
// Fan tachometer.
PINMUX_AUX(PINMUX_AUX_CAM1_PWDN) = PINMUX_PULL_UP | PINMUX_TRISTATE | PINMUX_INPUT_ENABLE | 3;
gpio_output_enable(GPIO_PORT_S, GPIO_PIN_7, GPIO_OUTPUT_DISABLE);
gpio_config(GPIO_PORT_S, GPIO_PIN_7, GPIO_MODE_GPIO);
gpio_write(GPIO_PORT_S, GPIO_PIN_7, GPIO_LOW);
PWM(PWM_CONTROLLER_PWM_CSR_1) = (1 << 31) | (255 << 16); // Max PWM to disable fan.
PINMUX_AUX(PINMUX_AUX_LCD_GPIO2) = 1; // Set source to PWM1.
gpio_config(GPIO_PORT_V, GPIO_PIN_4, GPIO_MODE_SPIO); // Fan power mode.
fan_init = true;
}
if (duty > 236)
duty = 236;
// Inverted polarity.
u32 inv_duty = 236 - duty;
// If disabled send a 0 duty.
if (inv_duty == 236)
PWM(PWM_CONTROLLER_PWM_CSR_1) = PWM_CSR_EN | (1 << 24);
else // Set PWM duty.
PWM(PWM_CONTROLLER_PWM_CSR_1) = PWM_CSR_EN | (inv_duty << 16);
}
void get_fan_speed(u32 *duty, u32 *rpm)
{
if (rpm)
{
u32 irq_count = 0;
bool should_read = true;
bool irq_val = 0;
// Poll irqs for 2 seconds.
int timer = get_tmr_us() + 1000000;
while (timer - get_tmr_us())
{
irq_val = gpio_read(GPIO_PORT_S, GPIO_PIN_7);
if (irq_val && should_read)
{
irq_count++;
should_read = false;
}
else if (!irq_val)
should_read = true;
}
// Calculate rpm based on triggered interrupts.
*rpm = 60000000 / ((1000000 * 2) / irq_count);
}
if (duty)
*duty = 236 - ((PWM(PWM_CONTROLLER_PWM_CSR_1) >> 16) & 0xFF);
}