ba7a5408ab
Convert the present initialization code into initialization macros. Since both the uart and the usart peripheral is implemented, two sets of initialization macros are necessary. Signed-off-by: Christian Taedcke <christian.taedcke@lemonbeat.com>
439 lines
12 KiB
C
439 lines
12 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 <drivers/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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#define USART_PREFIX cmuClock_USART
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#define UART_PREFIX cmuClock_UART
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#define CLOCK_ID_PRFX2(prefix, suffix) prefix##suffix
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#define CLOCK_ID_PRFX(prefix, suffix) CLOCK_ID_PRFX2(prefix, suffix)
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#define CLOCK_USART(id) CLOCK_ID_PRFX(USART_PREFIX, id)
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#define CLOCK_UART(id) CLOCK_ID_PRFX(UART_PREFIX, id)
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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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uint32_t baud_rate;
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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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struct soc_gpio_pin pin_rx;
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struct soc_gpio_pin pin_tx;
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#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
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uint8_t loc_rx;
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uint8_t loc_tx;
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#else
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uint8_t loc;
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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_info;
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uint32_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 void 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_info;
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USART_Tx(config->base, 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_info;
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uint32_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 uint8_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_info;
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uint8_t num_tx = 0U;
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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 = (uint32_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, uint8_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_info;
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uint8_t num_rx = 0U;
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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++] = (uint8_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_info;
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uint32_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_info;
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uint32_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_info;
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uint32_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) != 0U;
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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_info;
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uint32_t flags = USART_IntGet(config->base);
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return (flags & USART_IF_TXBL) != 0U;
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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_info;
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uint32_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_info;
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uint32_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_info;
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uint32_t flags = USART_IntGet(config->base);
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return (flags & USART_IF_RXDATAV) != 0U;
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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_info;
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uint32_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_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_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_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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#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
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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_tx << _USART_ROUTELOC0_TXLOC_SHIFT) |
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(config->loc_rx << _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_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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#define DT_DRV_COMPAT silabs_gecko_uart
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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#define GECKO_UART_IRQ_HANDLER_DECL(idx) \
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static void uart_gecko_config_func_##idx(struct device *dev)
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#define GECKO_UART_IRQ_HANDLER_FUNC(idx) \
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.irq_config_func = uart_gecko_config_func_##idx,
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#define GECKO_UART_IRQ_HANDLER(idx) \
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static void uart_gecko_config_func_##idx(struct device *dev) \
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{ \
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IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, rx, irq), \
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DT_INST_IRQ_BY_NAME(idx, rx, priority), \
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uart_gecko_isr, DEVICE_GET(uart_##idx), 0); \
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IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, tx, irq), \
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DT_INST_IRQ_BY_NAME(idx, tx, priority), \
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uart_gecko_isr, DEVICE_GET(uart_##idx), 0); \
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\
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irq_enable(DT_INST_IRQ_BY_NAME(idx, rx, irq)); \
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irq_enable(DT_INST_IRQ_BY_NAME(idx, tx, irq)); \
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}
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#else
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#define GECKO_UART_IRQ_HANDLER_DECL(idx)
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#define GECKO_UART_IRQ_HANDLER_FUNC(idx)
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#define GECKO_UART_IRQ_HANDLER(idx)
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#endif
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#ifdef CONFIG_SOC_GECKO_HAS_INDIVIDUAL_PIN_LOCATION
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#define GECKO_UART_PIN_LOCATIONS(idx) \
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.loc_rx = DT_INST_PROP_BY_IDX(idx, location_rx, 0), \
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.loc_tx = DT_INST_PROP_BY_IDX(idx, location_tx, 0),
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#define VALIDATE_GECKO_UART_PIN_LOCATIONS(idx)
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#else
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#define GECKO_UART_PIN_LOCATIONS(idx) \
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.loc = DT_INST_PROP_BY_IDX(idx, location_rx, 0),
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#define VALIDATE_GECKO_UART_PIN_LOCATIONS(idx) \
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BUILD_ASSERT(DT_INST_PROP_BY_IDX(idx, location_rx, 0) == \
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DT_INST_PROP_BY_IDX(idx, location_tx, 0), \
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"DTS location-* properties must have identical value")
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#endif
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#define PIN_UART_RXD(idx) \
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{ \
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DT_INST_PROP_BY_IDX(idx, location_rx, 1), \
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DT_INST_PROP_BY_IDX(idx, location_rx, 2), \
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gpioModeInput, 1 \
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}
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#define PIN_UART_TXD(idx) \
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{ \
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DT_INST_PROP_BY_IDX(idx, location_tx, 1), \
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DT_INST_PROP_BY_IDX(idx, location_tx, 2), \
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gpioModePushPull, 1 \
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}
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#define GECKO_UART_PINS(idx) \
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.pin_rx = PIN_UART_RXD(idx), \
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.pin_tx = PIN_UART_TXD(idx),
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#define GECKO_UART_INIT(idx) \
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GECKO_UART_IRQ_HANDLER_DECL(idx); \
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\
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static const struct uart_gecko_config uart_gecko_cfg_##idx = { \
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.base = (USART_TypeDef *)DT_INST_REG_ADDR(idx), \
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.clock = CLOCK_UART(DT_INST_PROP(idx, peripheral_id)), \
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.baud_rate = DT_INST_PROP(idx, current_speed), \
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GECKO_UART_PINS(idx) \
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GECKO_UART_PIN_LOCATIONS(idx) \
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GECKO_UART_IRQ_HANDLER_FUNC(idx) \
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}; \
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\
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static struct uart_gecko_data uart_gecko_data_##idx; \
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\
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DEVICE_AND_API_INIT(uart_##idx, DT_INST_LABEL(idx), \
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&uart_gecko_init, &uart_gecko_data_##idx, \
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&uart_gecko_cfg_##idx, PRE_KERNEL_1, \
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
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&uart_gecko_driver_api); \
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\
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VALIDATE_GECKO_UART_PIN_LOCATIONS(idx); \
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\
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GECKO_UART_IRQ_HANDLER(idx)
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DT_INST_FOREACH_STATUS_OKAY(GECKO_UART_INIT)
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#undef DT_DRV_COMPAT
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#define DT_DRV_COMPAT silabs_gecko_usart
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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#define GECKO_USART_IRQ_HANDLER_DECL(idx) \
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static void usart_gecko_config_func_##idx(struct device *dev)
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#define GECKO_USART_IRQ_HANDLER_FUNC(idx) \
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.irq_config_func = usart_gecko_config_func_##idx,
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#define GECKO_USART_IRQ_HANDLER(idx) \
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static void usart_gecko_config_func_##idx(struct device *dev) \
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{ \
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IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, rx, irq), \
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DT_INST_IRQ_BY_NAME(idx, rx, priority), \
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uart_gecko_isr, DEVICE_GET(usart_##idx), 0); \
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IRQ_CONNECT(DT_INST_IRQ_BY_NAME(idx, tx, irq), \
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DT_INST_IRQ_BY_NAME(idx, tx, priority), \
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uart_gecko_isr, DEVICE_GET(usart_##idx), 0); \
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\
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irq_enable(DT_INST_IRQ_BY_NAME(idx, rx, irq)); \
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irq_enable(DT_INST_IRQ_BY_NAME(idx, tx, irq)); \
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}
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#else
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#define GECKO_USART_IRQ_HANDLER_DECL(idx)
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#define GECKO_USART_IRQ_HANDLER_FUNC(idx)
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#define GECKO_USART_IRQ_HANDLER(idx)
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#endif
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#define GECKO_USART_INIT(idx) \
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GECKO_USART_IRQ_HANDLER_DECL(idx); \
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\
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static const struct uart_gecko_config usart_gecko_cfg_##idx = { \
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.base = (USART_TypeDef *)DT_INST_REG_ADDR(idx), \
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.clock = CLOCK_USART(DT_INST_PROP(idx, peripheral_id)), \
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.baud_rate = DT_INST_PROP(idx, current_speed), \
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GECKO_UART_PINS(idx) \
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GECKO_UART_PIN_LOCATIONS(idx) \
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GECKO_USART_IRQ_HANDLER_FUNC(idx) \
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}; \
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\
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static struct uart_gecko_data usart_gecko_data_##idx; \
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\
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DEVICE_AND_API_INIT(usart_##idx, DT_INST_LABEL(idx), \
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&uart_gecko_init, &usart_gecko_data_##idx, \
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&usart_gecko_cfg_##idx, PRE_KERNEL_1, \
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
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&uart_gecko_driver_api); \
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\
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VALIDATE_GECKO_UART_PIN_LOCATIONS(idx); \
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\
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GECKO_USART_IRQ_HANDLER(idx)
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DT_INST_FOREACH_STATUS_OKAY(GECKO_USART_INIT)
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