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/*
* Copyright (c) 2022 Silicon Labs
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/drivers/pinctrl.h>
#include <soc_gpio.h>
int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintptr_t reg)
{
USART_TypeDef *base = (USART_TypeDef *)reg;
int usart_num = USART_NUM(base);
uint8_t loc;
#ifdef CONFIG_SPI_GECKO
struct soc_gpio_pin spi_pin_cfg = {0, 0, 0, 0};
#endif /* CONFIG_SPI_GECKO */
#ifdef CONFIG_UART_GECKO
struct soc_gpio_pin rxpin = {0, 0, 0, 0};
struct soc_gpio_pin txpin = {0, 0, 0, 0};
#endif /* CONFIG_UART_GECKO */
for (uint8_t i = 0U; i < pin_cnt; i++) {
switch (GECKO_GET_FUN(pins[i])) {
#ifdef CONFIG_UART_GECKO
case GECKO_FUN_UART_RX:
rxpin.port = GECKO_GET_PORT(pins[i]);
rxpin.pin = GECKO_GET_PIN(pins[i]);
rxpin.mode = gpioModeInput;
rxpin.out = 1;
GPIO_PinModeSet(rxpin.port, rxpin.pin, rxpin.mode,
rxpin.out);
break;
case GECKO_FUN_UART_TX:
txpin.port = GECKO_GET_PORT(pins[i]);
txpin.pin = GECKO_GET_PIN(pins[i]);
txpin.mode = gpioModePushPull;
txpin.out = 1;
GPIO_PinModeSet(txpin.port, txpin.pin, txpin.mode,
txpin.out);
break;
case GECKO_FUN_UART_LOC:
loc = GECKO_GET_LOC(pins[i]);
#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
/* For SOCs with configurable pin_cfg locations (set in SOC Kconfig) */
base->ROUTEPEN = USART_ROUTEPEN_RXPEN | USART_ROUTEPEN_TXPEN;
base->ROUTELOC0 = (loc << _USART_ROUTELOC0_TXLOC_SHIFT) |
(loc << _USART_ROUTELOC0_RXLOC_SHIFT);
base->ROUTELOC1 = _USART_ROUTELOC1_RESETVALUE;
#elif defined(USART_ROUTE_RXPEN) && defined(USART_ROUTE_TXPEN)
/* For olders SOCs with only one pin location */
base->ROUTE = USART_ROUTE_RXPEN | USART_ROUTE_TXPEN | (loc << 8);
#elif defined(GPIO_USART_ROUTEEN_RXPEN) && defined(GPIO_USART_ROUTEEN_TXPEN)
GPIO->USARTROUTE[usart_num].ROUTEEN =
GPIO_USART_ROUTEEN_TXPEN | GPIO_USART_ROUTEEN_RXPEN;
GPIO->USARTROUTE[usart_num].TXROUTE =
(txpin.pin << _GPIO_USART_TXROUTE_PIN_SHIFT) |
(txpin.port << _GPIO_USART_TXROUTE_PORT_SHIFT);
GPIO->USARTROUTE[usart_num].RXROUTE =
(rxpin.pin << _GPIO_USART_RXROUTE_PIN_SHIFT) |
(rxpin.port << _GPIO_USART_RXROUTE_PORT_SHIFT);
#endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */
#ifdef UART_GECKO_HW_FLOW_CONTROL
/* Configure HW flow control (RTS, CTS) */
if (config->hw_flowcontrol) {
GPIO_PinModeSet(config->pin_rts.port,
config->pin_rts.pin,
config->pin_rts.mode,
config->pin_rts.out);
GPIO_PinModeSet(config->pin_cts.port,
config->pin_cts.pin,
config->pin_cts.mode,
config->pin_cts.out);
#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
config->base->ROUTEPEN =
USART_ROUTEPEN_RXPEN | USART_ROUTEPEN_TXPEN |
USART_ROUTEPEN_RTSPEN | USART_ROUTEPEN_CTSPEN;
config->base->ROUTELOC1 =
(config->loc_rts << _USART_ROUTELOC1_RTSLOC_SHIFT) |
(config->loc_cts << _USART_ROUTELOC1_CTSLOC_SHIFT);
#elif defined(GPIO_USART_ROUTEEN_RTSPEN) && defined(GPIO_USART_ROUTEEN_CTSPEN)
GPIO->USARTROUTE[usart_num].ROUTEEN =
GPIO_USART_ROUTEEN_TXPEN | GPIO_USART_ROUTEEN_RXPEN |
GPIO_USART_ROUTEPEN_RTSPEN | GPIO_USART_ROUTEPEN_CTSPEN;
GPIO->USARTROUTE[usart_num].RTSROUTE =
(config->pin_rts.pin << _GPIO_USART_RTSROUTE_PIN_SHIFT) |
(config->pin_rts.port << _GPIO_USART_RTSROUTE_PORT_SHIFT);
GPIO->USARTROUTE[usart_num].CTSROUTE =
(config->pin_cts.pin << _GPIO_USART_CTSROUTE_PIN_SHIFT) |
(config->pin_cts.port << _GPIO_USART_CTSROUTE_PORT_SHIFT);
#endif /* CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION */
}
#endif /* UART_GECKO_HW_FLOW_CONTROL */
break;
#endif /* CONFIG_UART_GECKO */
#ifdef CONFIG_SPI_GECKO
case GECKO_FUN_SPI_SCK:
spi_pin_cfg.port = GECKO_GET_PORT(pins[i]);
spi_pin_cfg.pin = GECKO_GET_PIN(pins[i]);
spi_pin_cfg.mode = gpioModePushPull;
spi_pin_cfg.out = 1;
GPIO->USARTROUTE[usart_num].ROUTEEN |= GPIO_USART_ROUTEEN_CLKPEN;
GPIO->USARTROUTE[usart_num].CLKROUTE =
(spi_pin_cfg.pin << _GPIO_USART_CLKROUTE_PIN_SHIFT) |
(spi_pin_cfg.port << _GPIO_USART_CLKROUTE_PORT_SHIFT);
break;
case GECKO_FUN_SPI_MOSI:
spi_pin_cfg.port = GECKO_GET_PORT(pins[i]);
spi_pin_cfg.pin = GECKO_GET_PIN(pins[i]);
spi_pin_cfg.mode = gpioModePushPull;
spi_pin_cfg.out = 1;
GPIO->USARTROUTE[usart_num].ROUTEEN |= GPIO_USART_ROUTEEN_TXPEN;
GPIO->USARTROUTE[usart_num].TXROUTE =
(spi_pin_cfg.pin << _GPIO_USART_TXROUTE_PIN_SHIFT) |
(spi_pin_cfg.port << _GPIO_USART_TXROUTE_PORT_SHIFT);
break;
case GECKO_FUN_SPI_MISO:
spi_pin_cfg.port = GECKO_GET_PORT(pins[i]);
spi_pin_cfg.pin = GECKO_GET_PIN(pins[i]);
spi_pin_cfg.mode = gpioModeInput;
spi_pin_cfg.out = 1;
GPIO->USARTROUTE[usart_num].ROUTEEN |= GPIO_USART_ROUTEEN_RXPEN;
GPIO->USARTROUTE[usart_num].RXROUTE =
(spi_pin_cfg.pin << _GPIO_USART_RXROUTE_PIN_SHIFT) |
(spi_pin_cfg.port << _GPIO_USART_RXROUTE_PORT_SHIFT);
break;
#endif /* CONFIG_SPI_GECKO */
default:
return -ENOTSUP;
}
#ifdef CONFIG_SPI_GECKO
GPIO_PinModeSet(spi_pin_cfg.port, spi_pin_cfg.pin,
spi_pin_cfg.mode, spi_pin_cfg.out);
#endif /* CONFIG_SPI_GECKO */
}
return 0;
}