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hekate/bdk/soc/gpio.c
CTCaer 107fbd1d24 bdk: gpio: add debounce set function
The debounce time is not per pin but per bank. So software should manage proper time for sibling pins
2023-03-31 07:43:16 +03:00

206 lines
5.3 KiB
C

/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2019-2023 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 <soc/gpio.h>
#include <soc/t210.h>
#define GPIO_BANK_IDX(port) ((port) >> 2)
#define GPIO_PORT_OFFSET(port) ((GPIO_BANK_IDX(port) << 8) + (((port) % 4) << 2))
#define GPIO_CNF_OFFSET(port) (0x00 + GPIO_PORT_OFFSET(port))
#define GPIO_OE_OFFSET(port) (0x10 + GPIO_PORT_OFFSET(port))
#define GPIO_OUT_OFFSET(port) (0x20 + GPIO_PORT_OFFSET(port))
#define GPIO_IN_OFFSET(port) (0x30 + GPIO_PORT_OFFSET(port))
#define GPIO_INT_STA_OFFSET(port) (0x40 + GPIO_PORT_OFFSET(port))
#define GPIO_INT_ENB_OFFSET(port) (0x50 + GPIO_PORT_OFFSET(port))
#define GPIO_INT_LVL_OFFSET(port) (0x60 + GPIO_PORT_OFFSET(port))
#define GPIO_INT_CLR_OFFSET(port) (0x70 + GPIO_PORT_OFFSET(port))
#define GPIO_CNF_MASKED_OFFSET(port) (0x80 + GPIO_PORT_OFFSET(port))
#define GPIO_OE_MASKED_OFFSET(port) (0x90 + GPIO_PORT_OFFSET(port))
#define GPIO_OUT_MASKED_OFFSET(port) (0xA0 + GPIO_PORT_OFFSET(port))
#define GPIO_INT_STA_MASKED_OFFSET(port) (0xC0 + GPIO_PORT_OFFSET(port))
#define GPIO_INT_ENB_MASKED_OFFSET(port) (0xD0 + GPIO_PORT_OFFSET(port))
#define GPIO_INT_LVL_MASKED_OFFSET(port) (0xE0 + GPIO_PORT_OFFSET(port))
#define GPIO_DB_CTRL_OFFSET(port) (0xB0 + GPIO_PORT_OFFSET(port))
#define GPIO_DB_CNT_OFFSET(port) (0xF0 + GPIO_PORT_OFFSET(port))
#define GPIO_IRQ_BANK1 32
#define GPIO_IRQ_BANK2 33
#define GPIO_IRQ_BANK3 34
#define GPIO_IRQ_BANK4 35
#define GPIO_IRQ_BANK5 55
#define GPIO_IRQ_BANK6 87
#define GPIO_IRQ_BANK7 89
#define GPIO_IRQ_BANK8 125
static u8 gpio_bank_irq_ids[8] = {
GPIO_IRQ_BANK1, GPIO_IRQ_BANK2, GPIO_IRQ_BANK3, GPIO_IRQ_BANK4,
GPIO_IRQ_BANK5, GPIO_IRQ_BANK6, GPIO_IRQ_BANK7, GPIO_IRQ_BANK8
};
void gpio_config(u32 port, u32 pins, int mode)
{
const u32 offset = GPIO_CNF_OFFSET(port);
if (mode)
GPIO(offset) |= pins;
else
GPIO(offset) &= ~pins;
(void)GPIO(offset); // Commit the write.
}
void gpio_output_enable(u32 port, u32 pins, int enable)
{
const u32 port_offset = GPIO_OE_OFFSET(port);
if (enable)
GPIO(port_offset) |= pins;
else
GPIO(port_offset) &= ~pins;
(void)GPIO(port_offset); // Commit the write.
}
void gpio_write(u32 port, u32 pins, int high)
{
const u32 port_offset = GPIO_OUT_OFFSET(port);
if (high)
GPIO(port_offset) |= pins;
else
GPIO(port_offset) &= ~pins;
(void)GPIO(port_offset); // Commit the write.
}
void gpio_direction_input(u32 port, u32 pins)
{
gpio_config(port, pins, GPIO_MODE_GPIO);
gpio_output_enable(port, pins, GPIO_OUTPUT_DISABLE);
}
void gpio_direction_output(u32 port, u32 pins, int high)
{
gpio_config(port, pins, GPIO_MODE_GPIO);
gpio_write(port, pins, high);
gpio_output_enable(port, pins, GPIO_OUTPUT_ENABLE);
}
int gpio_read(u32 port, u32 pins)
{
const u32 port_offset = GPIO_IN_OFFSET(port);
return (GPIO(port_offset) & pins) ? 1 : 0;
}
void gpio_set_debounce(u32 port, u32 pins, u32 ms)
{
const u32 db_ctrl_offset = GPIO_DB_CTRL_OFFSET(port);
const u32 db_cnt_offset = GPIO_DB_CNT_OFFSET(port);
if (ms)
{
if (ms > 255)
ms = 255;
// Debounce time affects all pins of the same port.
GPIO(db_cnt_offset) = ms;
GPIO(db_ctrl_offset) = (pins << 8) | pins;
}
else
GPIO(db_ctrl_offset) = (pins << 8) | 0;
(void)GPIO(db_ctrl_offset); // Commit the write.
}
static void _gpio_interrupt_clear(u32 port, u32 pins)
{
const u32 port_offset = GPIO_INT_CLR_OFFSET(port);
GPIO(port_offset) |= pins;
(void)GPIO(port_offset); // Commit the write.
}
int gpio_interrupt_status(u32 port, u32 pins)
{
const u32 port_offset = GPIO_INT_STA_OFFSET(port);
const u32 enabled_mask = GPIO(GPIO_INT_ENB_OFFSET(port)) & pins;
int status = ((GPIO(port_offset) & pins) && enabled_mask) ? 1 : 0;
// Clear the interrupt status.
if (status)
_gpio_interrupt_clear(port, pins);
return status;
}
void gpio_interrupt_enable(u32 port, u32 pins, int enable)
{
const u32 port_offset = GPIO_INT_ENB_OFFSET(port);
// Clear any possible stray interrupt.
_gpio_interrupt_clear(port, pins);
if (enable)
GPIO(port_offset) |= pins;
else
GPIO(port_offset) &= ~pins;
(void)GPIO(port_offset); // Commit the write.
}
void gpio_interrupt_level(u32 port, u32 pins, int high, int edge, int delta)
{
const u32 port_offset = GPIO_INT_LVL_OFFSET(port);
u32 val = GPIO(port_offset);
if (high)
val |= pins;
else
val &= ~pins;
if (edge)
val |= pins << 8;
else
val &= ~(pins << 8);
if (delta)
val |= pins << 16;
else
val &= ~(pins << 16);
GPIO(port_offset) = val;
(void)GPIO(port_offset); // Commit the write.
// Clear any possible stray interrupt.
_gpio_interrupt_clear(port, pins);
}
u32 gpio_get_bank_irq_id(u32 port)
{
const u32 bank_idx = GPIO_BANK_IDX(port);
return gpio_bank_irq_ids[bank_idx];
}