blob: 0dff44619031c428665f96018b5d9cdfa0e3fae5 [file] [log] [blame]
/*
* Copyright (c) 2023 Antmicro <www.antmicro.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT renesas_rzt2m_pinctrl
#include <zephyr/arch/cpu.h>
#include <zephyr/drivers/pinctrl.h>
#include <soc.h>
#define PORT_NSR DT_INST_REG_ADDR_BY_NAME(0, port_nsr)
#define PTADR DT_INST_REG_ADDR_BY_NAME(0, ptadr)
/* Port m mode control register */
#define PMC(port) (PORT_NSR + 0x400 + port)
/* Port m function control register */
#define PFC(port) (PORT_NSR + 0x600 + (0x4 * port))
/* IO Buffer m function switching register */
#define DRCTL(port, pin) (PORT_NSR + 0xa00 + (0x8 * port) + pin)
/* Port m region select register */
#define RSELP(port) (PTADR + port)
#define DRCTL_DRIVE_STRENGTH(val) (val & 0x3)
#define DRCTL_PULL_UP_DOWN(val) ((val & 0x3) << 2)
#define DRCTL_SCHMITT(val) ((val & 0x1) << 4)
#define DRCTL_SLEW_RATE(val) ((val & 0x1) << 5)
#define DRCTL_CONFIG(drive, pull, schmitt, slew) \
(DRCTL_DRIVE_STRENGTH(drive) | DRCTL_PULL_UP_DOWN(pull) | DRCTL_SCHMITT(schmitt) | \
DRCTL_SLEW_RATE(slew))
#define PFC_FUNC_MASK(pin) (0xf << (pin * 4))
static void pinctrl_configure_pin(const pinctrl_soc_pin_t *pin)
{
uint8_t rselp = sys_read8(RSELP(pin->port));
uint32_t pfc = sys_read32(PFC(pin->port)) & ~(PFC_FUNC_MASK(pin->pin));
uint8_t pmc = sys_read8(PMC(pin->port));
/* Set proper bit in the RSELP register to use as non-safety domain. */
sys_write8(rselp | BIT(pin->pin), RSELP(pin->port));
sys_write8(DRCTL_CONFIG(
pin->drive_strength, (pin->pull_up == 1 ? 1U : (pin->pull_down == 1 ? 2U : 0)),
pin->schmitt_enable, pin->slew_rate),
DRCTL(pin->port, pin->pin));
/* Select function for the pin. */
sys_write32(pfc | pin->func << (pin->pin * 4), PFC(pin->port));
/* Set proper bit in the PMC register to use the pin as a peripheral IO. */
sys_write8(pmc | BIT(pin->pin), PMC(pin->port));
}
int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintptr_t reg)
{
ARG_UNUSED(reg);
for (uint8_t i = 0U; i < pin_cnt; i++) {
pinctrl_configure_pin(pins++);
}
return 0;
}