static void uart_gecko_init_pins(struct device *dev)
{
const struct uart_gecko_config *config = dev->config->config_info;
soc_gpio_configure(&config->pin_rx);
soc_gpio_configure(&config->pin_tx);
#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
config->base->ROUTEPEN = USART_ROUTEPEN_RXPEN | USART_ROUTEPEN_TXPEN;
config->base->ROUTELOC0 =
(config->loc_tx << _USART_ROUTELOC0_TXLOC_SHIFT) |
(config->loc_rx << _USART_ROUTELOC0_RXLOC_SHIFT);
config->base->ROUTELOC1 = _USART_ROUTELOC1_RESETVALUE;
#else
config->base->ROUTE = USART_ROUTE_RXPEN | USART_ROUTE_TXPEN
| (config->loc << 8);
#endif
}
static int usart_sam_init(struct device *dev)
{
int retval;
const struct usart_sam_dev_cfg *const cfg = DEV_CFG(dev);
struct usart_sam_dev_data *const dev_data = DEV_DATA(dev);
Usart *const usart = cfg->regs;
/* Enable USART clock in PMC */
soc_pmc_peripheral_enable(cfg->periph_id);
/* Connect pins to the peripheral */
soc_gpio_configure(&cfg->pin_rx);
soc_gpio_configure(&cfg->pin_tx);
/* Reset and disable USART */
usart->US_CR = US_CR_RSTRX | US_CR_RSTTX
| US_CR_RXDIS | US_CR_TXDIS | US_CR_RSTSTA;
/* Disable Interrupts */
usart->US_IDR = 0xFFFFFFFF;
/* 8 bits of data, no parity, 1 stop bit in normal mode */
usart->US_MR = US_MR_NBSTOP_1_BIT
| US_MR_PAR_NO
| US_MR_CHRL_8_BIT
| US_MR_USCLKS_MCK
| US_MR_CHMODE_NORMAL;
/* Set baud rate */
retval = baudrate_set(usart, dev_data->baud_rate,
SOC_ATMEL_SAM_MCK_FREQ_HZ);
if (retval != 0) {
return retval;
};
/* Enable receiver and transmitter */
usart->US_CR = US_CR_RXEN | US_CR_TXEN;
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
cfg->irq_config_func(dev);
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
return 0;
}
