539 lines
14 KiB
C
539 lines
14 KiB
C
/*
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* Copyright (c) 2017, Christian Taedcke
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <errno.h>
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#include <uart.h>
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#include <em_usart.h>
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#include <em_gpio.h>
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#include <em_cmu.h>
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#include <soc.h>
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struct uart_gecko_config {
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USART_TypeDef *base;
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CMU_Clock_TypeDef clock;
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u32_t baud_rate;
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struct soc_gpio_pin pin_rx;
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struct soc_gpio_pin pin_tx;
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unsigned int loc;
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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void (*irq_config_func)(struct device *dev);
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#endif
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};
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struct uart_gecko_data {
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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uart_irq_callback_user_data_t callback;
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void *cb_data;
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#endif
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};
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static int uart_gecko_poll_in(struct device *dev, unsigned char *c)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t flags = USART_StatusGet(config->base);
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if (flags & USART_STATUS_RXDATAV) {
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*c = USART_Rx(config->base);
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return 0;
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}
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return -1;
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}
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static unsigned char uart_gecko_poll_out(struct device *dev, unsigned char c)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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USART_Tx(config->base, c);
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return c;
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}
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static int uart_gecko_err_check(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t flags = USART_IntGet(config->base);
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int err = 0;
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if (flags & USART_IF_RXOF) {
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err |= UART_ERROR_OVERRUN;
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}
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if (flags & USART_IF_PERR) {
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err |= UART_ERROR_PARITY;
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}
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if (flags & USART_IF_FERR) {
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err |= UART_ERROR_FRAMING;
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}
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USART_IntClear(config->base, USART_IF_RXOF |
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USART_IF_PERR |
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USART_IF_FERR);
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return err;
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}
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static int uart_gecko_fifo_fill(struct device *dev, const u8_t *tx_data,
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int len)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u8_t num_tx = 0;
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while ((len - num_tx > 0) &&
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(config->base->STATUS & USART_STATUS_TXBL)) {
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config->base->TXDATA = (u32_t)tx_data[num_tx++];
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}
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return num_tx;
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}
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static int uart_gecko_fifo_read(struct device *dev, u8_t *rx_data,
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const int len)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u8_t num_rx = 0;
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while ((len - num_rx > 0) &&
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(config->base->STATUS & USART_STATUS_RXDATAV)) {
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rx_data[num_rx++] = (u8_t)config->base->RXDATA;
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}
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return num_rx;
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}
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static void uart_gecko_irq_tx_enable(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t mask = USART_IEN_TXBL | USART_IEN_TXC;
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USART_IntEnable(config->base, mask);
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}
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static void uart_gecko_irq_tx_disable(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t mask = USART_IEN_TXBL | USART_IEN_TXC;
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USART_IntDisable(config->base, mask);
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}
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static int uart_gecko_irq_tx_complete(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t flags = USART_IntGet(config->base);
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USART_IntClear(config->base, USART_IF_TXC);
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return (flags & USART_IF_TXC) != 0;
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}
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static int uart_gecko_irq_tx_ready(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t flags = USART_IntGet(config->base);
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return (flags & USART_IF_TXBL) != 0;
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}
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static void uart_gecko_irq_rx_enable(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t mask = USART_IEN_RXDATAV;
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USART_IntEnable(config->base, mask);
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}
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static void uart_gecko_irq_rx_disable(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t mask = USART_IEN_RXDATAV;
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USART_IntDisable(config->base, mask);
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}
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static int uart_gecko_irq_rx_full(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t flags = USART_IntGet(config->base);
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return (flags & USART_IF_RXDATAV) != 0;
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}
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static int uart_gecko_irq_rx_ready(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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u32_t mask = USART_IEN_RXDATAV;
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return (config->base->IEN & mask)
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&& uart_gecko_irq_rx_full(dev);
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}
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static void uart_gecko_irq_err_enable(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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USART_IntEnable(config->base, USART_IF_RXOF |
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USART_IF_PERR |
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USART_IF_FERR);
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}
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static void uart_gecko_irq_err_disable(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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USART_IntDisable(config->base, USART_IF_RXOF |
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USART_IF_PERR |
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USART_IF_FERR);
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}
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static int uart_gecko_irq_is_pending(struct device *dev)
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{
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return uart_gecko_irq_tx_ready(dev) || uart_gecko_irq_rx_ready(dev);
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}
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static int uart_gecko_irq_update(struct device *dev)
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{
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return 1;
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}
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static void uart_gecko_irq_callback_set(struct device *dev,
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uart_irq_callback_user_data_t cb,
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void *cb_data)
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{
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struct uart_gecko_data *data = dev->driver_data;
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data->callback = cb;
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data->cb_data = cb_data;
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}
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static void uart_gecko_isr(void *arg)
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{
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struct device *dev = arg;
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struct uart_gecko_data *data = dev->driver_data;
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if (data->callback) {
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data->callback(data->cb_data);
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}
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}
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
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static void uart_gecko_init_pins(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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soc_gpio_configure(&config->pin_rx);
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soc_gpio_configure(&config->pin_tx);
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#if defined(_USART_ROUTEPEN_MASK) || defined(_UART_ROUTEPEN_MASK)
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config->base->ROUTEPEN = USART_ROUTEPEN_RXPEN | USART_ROUTEPEN_TXPEN;
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config->base->ROUTELOC0 =
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(config->loc << _USART_ROUTELOC0_TXLOC_SHIFT) |
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(config->loc << _USART_ROUTELOC0_RXLOC_SHIFT);
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config->base->ROUTELOC1 = _USART_ROUTELOC1_RESETVALUE;
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#else
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config->base->ROUTE = USART_ROUTE_RXPEN | USART_ROUTE_TXPEN
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| (config->loc << 8);
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#endif
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}
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static int uart_gecko_init(struct device *dev)
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{
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const struct uart_gecko_config *config = dev->config->config_info;
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USART_InitAsync_TypeDef usartInit = USART_INITASYNC_DEFAULT;
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/* The peripheral and gpio clock are already enabled from soc and gpio
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* driver
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*/
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usartInit.baudrate = config->baud_rate;
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/* Enable USART clock */
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CMU_ClockEnable(config->clock, true);
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/* Init USART */
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USART_InitAsync(config->base, &usartInit);
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/* Initialize USART pins */
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uart_gecko_init_pins(dev);
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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config->irq_config_func(dev);
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#endif
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return 0;
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}
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static const struct uart_driver_api uart_gecko_driver_api = {
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.poll_in = uart_gecko_poll_in,
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.poll_out = uart_gecko_poll_out,
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.err_check = uart_gecko_err_check,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.fifo_fill = uart_gecko_fifo_fill,
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.fifo_read = uart_gecko_fifo_read,
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.irq_tx_enable = uart_gecko_irq_tx_enable,
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.irq_tx_disable = uart_gecko_irq_tx_disable,
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.irq_tx_complete = uart_gecko_irq_tx_complete,
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.irq_tx_ready = uart_gecko_irq_tx_ready,
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.irq_rx_enable = uart_gecko_irq_rx_enable,
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.irq_rx_disable = uart_gecko_irq_rx_disable,
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.irq_rx_ready = uart_gecko_irq_rx_ready,
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.irq_err_enable = uart_gecko_irq_err_enable,
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.irq_err_disable = uart_gecko_irq_err_disable,
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.irq_is_pending = uart_gecko_irq_is_pending,
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.irq_update = uart_gecko_irq_update,
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.irq_callback_set = uart_gecko_irq_callback_set,
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#endif
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};
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#ifdef CONFIG_UART_GECKO_0
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void uart_gecko_config_func_0(struct device *dev);
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#endif
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static const struct uart_gecko_config uart_gecko_0_config = {
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.base = (USART_TypeDef *)DT_UART_GECKO_0_BASE_ADDRESS,
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.clock = cmuClock_UART0,
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.baud_rate = DT_UART_GECKO_0_CURRENT_SPEED,
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.pin_rx = PIN_UART0_RXD,
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.pin_tx = PIN_UART0_TXD,
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.loc = DT_UART_GECKO_0_LOCATION,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.irq_config_func = uart_gecko_config_func_0,
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#endif
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};
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static struct uart_gecko_data uart_gecko_0_data;
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DEVICE_AND_API_INIT(uart_0, DT_UART_GECKO_0_LABEL, &uart_gecko_init, &uart_gecko_0_data,
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&uart_gecko_0_config, PRE_KERNEL_1,
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &uart_gecko_driver_api);
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void uart_gecko_config_func_0(struct device *dev)
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{
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IRQ_CONNECT(DT_UART_GECKO_0_IRQ_RX,
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DT_UART_GECKO_0_IRQ_RX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(uart_0), 0);
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IRQ_CONNECT(DT_UART_GECKO_0_IRQ_TX,
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DT_UART_GECKO_0_IRQ_TX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(uart_0), 0);
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irq_enable(DT_UART_GECKO_0_IRQ_RX);
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irq_enable(DT_UART_GECKO_0_IRQ_TX);
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}
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#endif
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#endif /* CONFIG_UART_GECKO_0 */
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#ifdef CONFIG_UART_GECKO_1
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void uart_gecko_config_func_1(struct device *dev);
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#endif
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static const struct uart_gecko_config uart_gecko_1_config = {
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.base = (USART_TypeDef *)DT_UART_GECKO_1_BASE_ADDRESS,
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.clock = cmuClock_UART1,
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.baud_rate = DT_UART_GECKO_1_CURRENT_SPEED,
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.pin_rx = PIN_UART1_RXD,
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.pin_tx = PIN_UART1_TXD,
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.loc = DT_UART_GECKO_1_LOCATION,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.irq_config_func = uart_gecko_config_func_1,
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#endif
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};
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static struct uart_gecko_data uart_gecko_1_data;
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DEVICE_AND_API_INIT(uart_1, DT_UART_GECKO_1_LABEL, &uart_gecko_init, &uart_gecko_1_data,
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&uart_gecko_1_config, PRE_KERNEL_1,
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &uart_gecko_driver_api);
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void uart_gecko_config_func_1(struct device *dev)
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{
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IRQ_CONNECT(DT_UART_GECKO_1_IRQ_RX,
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DT_UART_GECKO_1_IRQ_RX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(uart_1), 0);
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IRQ_CONNECT(DT_UART_GECKO_1_IRQ_TX,
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DT_UART_GECKO_1_IRQ_TX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(uart_1), 0);
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irq_enable(DT_UART_GECKO_1_IRQ_RX);
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irq_enable(DT_UART_GECKO_1_IRQ_TX);
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}
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#endif
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#endif /* CONFIG_UART_GECKO_1 */
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#ifdef CONFIG_USART_GECKO_0
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void usart_gecko_config_func_0(struct device *dev);
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#endif
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static const struct uart_gecko_config usart_gecko_0_config = {
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.base = (USART_TypeDef *)DT_USART_GECKO_0_BASE_ADDRESS,
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.clock = cmuClock_USART0,
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.baud_rate = DT_USART_GECKO_0_CURRENT_SPEED,
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.pin_rx = PIN_USART0_RXD,
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.pin_tx = PIN_USART0_TXD,
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.loc = DT_USART_GECKO_0_LOCATION,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.irq_config_func = usart_gecko_config_func_0,
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#endif
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};
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static struct uart_gecko_data usart_gecko_0_data;
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DEVICE_AND_API_INIT(usart_0, DT_USART_GECKO_0_LABEL, &uart_gecko_init,
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&usart_gecko_0_data, &usart_gecko_0_config, PRE_KERNEL_1,
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &uart_gecko_driver_api);
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void usart_gecko_config_func_0(struct device *dev)
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{
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IRQ_CONNECT(DT_USART_GECKO_0_IRQ_RX,
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DT_USART_GECKO_0_IRQ_RX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(usart_0), 0);
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IRQ_CONNECT(DT_USART_GECKO_0_IRQ_TX,
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DT_USART_GECKO_0_IRQ_TX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(usart_0), 0);
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irq_enable(DT_USART_GECKO_0_IRQ_RX);
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irq_enable(DT_USART_GECKO_0_IRQ_TX);
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}
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#endif
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#endif /* CONFIG_USART_GECKO_0 */
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#ifdef CONFIG_USART_GECKO_1
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void usart_gecko_config_func_1(struct device *dev);
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#endif
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static const struct uart_gecko_config usart_gecko_1_config = {
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.base = (USART_TypeDef *)DT_USART_GECKO_1_BASE_ADDRESS,
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.clock = cmuClock_USART1,
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.baud_rate = DT_USART_GECKO_1_CURRENT_SPEED,
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.pin_rx = PIN_USART1_RXD,
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.pin_tx = PIN_USART1_TXD,
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.loc = DT_USART_GECKO_1_LOCATION,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.irq_config_func = usart_gecko_config_func_1,
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#endif
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};
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static struct uart_gecko_data usart_gecko_1_data;
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DEVICE_AND_API_INIT(usart_1, DT_USART_GECKO_1_LABEL, &uart_gecko_init,
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&usart_gecko_1_data, &usart_gecko_1_config, PRE_KERNEL_1,
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &uart_gecko_driver_api);
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void usart_gecko_config_func_1(struct device *dev)
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{
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IRQ_CONNECT(DT_USART_GECKO_1_IRQ_RX,
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DT_USART_GECKO_1_IRQ_RX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(usart_1), 0);
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IRQ_CONNECT(DT_USART_GECKO_1_IRQ_TX,
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DT_USART_GECKO_1_IRQ_TX_PRIORITY, uart_gecko_isr,
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DEVICE_GET(usart_1), 0);
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irq_enable(DT_USART_GECKO_1_IRQ_RX);
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irq_enable(DT_USART_GECKO_1_IRQ_TX);
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}
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#endif
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#endif /* CONFIG_USART_GECKO_1 */
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#ifdef CONFIG_USART_GECKO_2
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static void usart_gecko_config_func_2(struct device *dev);
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#endif
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static const struct uart_gecko_config usart_gecko_2_config = {
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.base = (USART_TypeDef *)DT_USART_GECKO_2_BASE_ADDRESS,
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.clock = cmuClock_USART2,
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.baud_rate = DT_USART_GECKO_2_CURRENT_SPEED,
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.pin_rx = PIN_USART2_RXD,
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|
.pin_tx = PIN_USART2_TXD,
|
|
.loc = DT_USART_GECKO_2_LOCATION,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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|
.irq_config_func = usart_gecko_config_func_2,
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#endif
|
|
};
|
|
|
|
static struct uart_gecko_data usart_gecko_2_data;
|
|
|
|
DEVICE_AND_API_INIT(usart_2, DT_USART_GECKO_2_LABEL, &uart_gecko_init,
|
|
&usart_gecko_2_data, &usart_gecko_2_config, PRE_KERNEL_1,
|
|
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &uart_gecko_driver_api);
|
|
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
static void usart_gecko_config_func_2(struct device *dev)
|
|
{
|
|
IRQ_CONNECT(DT_USART_GECKO_2_IRQ_RX,
|
|
DT_USART_GECKO_2_IRQ_RX_PRIORITY, uart_gecko_isr,
|
|
DEVICE_GET(usart_2), 0);
|
|
IRQ_CONNECT(DT_USART_GECKO_2_IRQ_TX,
|
|
DT_USART_GECKO_2_IRQ_TX_PRIORITY, uart_gecko_isr,
|
|
DEVICE_GET(usart_2), 0);
|
|
|
|
irq_enable(DT_USART_GECKO_2_IRQ_RX);
|
|
irq_enable(DT_USART_GECKO_2_IRQ_TX);
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_USART_GECKO_2 */
|
|
|
|
#ifdef CONFIG_USART_GECKO_3
|
|
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
static void usart_gecko_config_func_3(struct device *dev);
|
|
#endif
|
|
|
|
static const struct uart_gecko_config usart_gecko_3_config = {
|
|
.base = (USART_TypeDef *)DT_USART_GECKO_3_BASE_ADDRESS,
|
|
.clock = cmuClock_USART3,
|
|
.baud_rate = DT_USART_GECKO_3_CURRENT_SPEED,
|
|
.pin_rx = PIN_USART3_RXD,
|
|
.pin_tx = PIN_USART3_TXD,
|
|
.loc = DT_USART_GECKO_3_LOCATION,
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
.irq_config_func = usart_gecko_config_func_3,
|
|
#endif
|
|
};
|
|
|
|
static struct uart_gecko_data usart_gecko_3_data;
|
|
|
|
DEVICE_AND_API_INIT(usart_3, DT_USART_GECKO_3_LABEL, &uart_gecko_init,
|
|
&usart_gecko_3_data, &usart_gecko_3_config, PRE_KERNEL_1,
|
|
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &uart_gecko_driver_api);
|
|
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
static void usart_gecko_config_func_3(struct device *dev)
|
|
{
|
|
IRQ_CONNECT(DT_USART_GECKO_3_IRQ_RX,
|
|
DT_USART_GECKO_3_IRQ_RX_PRIORITY, uart_gecko_isr,
|
|
DEVICE_GET(usart_3), 0);
|
|
IRQ_CONNECT(DT_USART_GECKO_3_IRQ_TX,
|
|
DT_USART_GECKO_3_IRQ_TX_PRIORITY, uart_gecko_isr,
|
|
DEVICE_GET(usart_3), 0);
|
|
|
|
irq_enable(DT_USART_GECKO_3_IRQ_RX);
|
|
irq_enable(DT_USART_GECKO_3_IRQ_TX);
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_USART_GECKO_3 */
|