mirror of
https://github.com/CTCaer/hekate
synced 2024-07-03 15:03:29 +00:00
185526d134
BDK will allow developers to use the full collection of drivers, with limited editing, if any, for making payloads for Nintendo Switch. Using a single source for everything will also help decoupling Switch specific code and easily port it to other Tegra X1/X1+ platforms. And maybe even to lower targets. Everything is now centrilized into bdk folder. Every module or project can utilize it by simply including it. This is just the start and it will continue to improve.
107 lines
2.7 KiB
C
107 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 "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 | (1 << 24); // 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); // 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);
|
|
}
|