mirror of
https://github.com/CTCaer/hekate.git
synced 2024-11-14 14:26:57 +00:00
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/*
|
|
* Fan driver for Nintendo Switch
|
|
*
|
|
* Copyright (c) 2018-2020 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 <thermal/fan.h>
|
|
#include <power/regulator_5v.h>
|
|
#include <soc/gpio.h>
|
|
#include <soc/pinmux.h>
|
|
#include <soc/t210.h>
|
|
#include <utils/util.h>
|
|
|
|
void set_fan_duty(u32 duty)
|
|
{
|
|
static bool fan_init = false;
|
|
static u16 curr_duty = -1;
|
|
|
|
if (curr_duty == duty)
|
|
return;
|
|
|
|
if (!fan_init)
|
|
{
|
|
// Fan tachometer.
|
|
PINMUX_AUX(PINMUX_AUX_CAM1_PWDN) = PINMUX_TRISTATE | PINMUX_INPUT_ENABLE | PINMUX_PULL_UP | 1;
|
|
gpio_config(GPIO_PORT_S, GPIO_PIN_7, GPIO_MODE_GPIO);
|
|
gpio_output_enable(GPIO_PORT_S, GPIO_PIN_7, GPIO_OUTPUT_DISABLE);
|
|
|
|
PWM(PWM_CONTROLLER_PWM_CSR_1) = PWM_CSR_EN | (0x100 << 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 | (0x100 << 16); // Bit 24 is absolute 0%.
|
|
regulator_disable_5v(REGULATOR_5V_FAN);
|
|
|
|
// Disable fan.
|
|
PINMUX_AUX(PINMUX_AUX_LCD_GPIO2) =
|
|
PINMUX_INPUT_ENABLE | PINMUX_PARKED | PINMUX_TRISTATE | PINMUX_PULL_DOWN; // Set source to PWM1.
|
|
}
|
|
else // Set PWM duty.
|
|
{
|
|
// Fan power supply.
|
|
regulator_enable_5v(REGULATOR_5V_FAN);
|
|
PWM(PWM_CONTROLLER_PWM_CSR_1) = PWM_CSR_EN | (inv_duty << 16);
|
|
|
|
// Enable fan.
|
|
PINMUX_AUX(PINMUX_AUX_LCD_GPIO2) = 1; // Set source to PWM1.
|
|
}
|
|
|
|
curr_duty = duty;
|
|
}
|
|
|
|
void get_fan_speed(u32 *duty, u32 *rpm)
|
|
{
|
|
if (rpm)
|
|
{
|
|
u32 irq_count = 1;
|
|
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);
|
|
}
|