11 #include <zephyr/drivers/uart.h>
20 /* Get UART instance */
24 /* UART TX buffer count max value */
27 /* UART TX/RX data registers size */
44 /* B91 UART registers structure */
59 /* B91 UART data structure */
70 /* B91 UART config structure */
109 static inline uint8_t uart_b91_get_tx_bufcnt(volatile struct uart_b91_t *uart)  in uart_b91_get_tx_bufcnt()  argument
111 	return (uart->bufcnt & FLD_UART_TX_BUF_CNT) >> FLD_UART_TX_BUF_CNT_OFFSET;  in uart_b91_get_tx_bufcnt()
115 static inline uint8_t uart_b91_get_rx_bufcnt(volatile struct uart_b91_t *uart)  in uart_b91_get_rx_bufcnt()  argument
117 	return (uart->bufcnt & FLD_UART_RX_BUF_CNT) >> FLD_UART_RX_BUF_CNT_OFFSET;  in uart_b91_get_rx_bufcnt()
200 /* Initializes the UART instance */
201 static void uart_b91_init(volatile struct uart_b91_t *uart, uint16_t divider,  in uart_b91_init()  argument
206 	uart->ctrl0 = bwpc;  in uart_b91_init()
207 	uart->clk_div = divider;  in uart_b91_init()
212 		uart->ctrl1 |= FLD_UART_PARITY_ENABLE;  in uart_b91_init()
216 			uart->ctrl1 &= (~FLD_UART_PARITY_POLARITY);  in uart_b91_init()
219 			uart->ctrl1 |= FLD_UART_PARITY_POLARITY;  in uart_b91_init()
222 		uart->ctrl1 &= (~FLD_UART_PARITY_ENABLE); /* disable parity function */  in uart_b91_init()
226 	uart->ctrl1 &= (~FLD_UART_STOP_SEL);  in uart_b91_init()
227 	uart->ctrl1 |= stop_bit;  in uart_b91_init()
255 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_configure()  local
284 	/* UART configure */  in uart_b91_configure()
286 	uart_b91_init(uart, divider, bwpc, parity, stop_bits);  in uart_b91_configure()
312 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_driver_init()  local
317 	uart->status |= UART_RX_RESET_BIT | UART_TX_RESET_BIT;  in uart_b91_driver_init()
328 	uart_b91_init(uart, divider, bwpc, UART_PARITY_NONE, UART_STOP_BIT_1);  in uart_b91_driver_init()
340 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_poll_out()  local
343 	while (uart_b91_get_tx_bufcnt(uart) >= UART_TX_BUF_CNT) {  in uart_b91_poll_out()
346 	uart->data_buf[data->tx_byte_index] = c;  in uart_b91_poll_out()
347 	data->tx_byte_index = (data->tx_byte_index + 1) % ARRAY_SIZE(uart->data_buf);  in uart_b91_poll_out()
353 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_poll_in()  local
356 	if (uart_b91_get_rx_bufcnt(uart) == 0) {  in uart_b91_poll_in()
360 	*c = uart->data_buf[data->rx_byte_index];  in uart_b91_poll_in()
361 	data->rx_byte_index = (data->rx_byte_index + 1) % ARRAY_SIZE(uart->data_buf);  in uart_b91_poll_in()
369 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_err_check()  local
371 	return ((uart->status & UART_RX_ERR_STATUS) != 0) ? 1 : 0;  in uart_b91_err_check()
382 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_fifo_fill()  local
389 		if (uart_b91_get_rx_bufcnt(uart) != 0) {  in uart_b91_fifo_fill()
405 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_fifo_read()  local
408 		if (uart_b91_get_rx_bufcnt(uart) == 0) {  in uart_b91_fifo_read()
421 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_tx_enable()  local
423 	uart->ctrl3 = (uart->ctrl3 & (~FLD_UART_TX_IRQ_TRIQ_LEV)) |  in uart_b91_irq_tx_enable()
425 	uart->ctrl0 |= UART_TX_IRQ_MASK;  in uart_b91_irq_tx_enable()
431 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_tx_disable()  local
433 	uart->ctrl0 &= ~UART_TX_IRQ_MASK;  in uart_b91_irq_tx_disable()
439 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_tx_ready()  local
441 	return ((uart_b91_get_tx_bufcnt(uart) < UART_TX_BUF_CNT) &&  in uart_b91_irq_tx_ready()
442 		((uart->ctrl0 & UART_TX_IRQ_MASK) != 0)) ? 1 : 0;  in uart_b91_irq_tx_ready()
448 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_tx_complete()  local
450 	return (uart_b91_get_tx_bufcnt(uart) == 0) ? 1 : 0;  in uart_b91_irq_tx_complete()
456 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_rx_enable()  local
458 	uart->ctrl3 = (uart->ctrl3 & (~FLD_UART_RX_IRQ_TRIQ_LEV)) |  in uart_b91_irq_rx_enable()
460 	uart->ctrl0 |= UART_RX_IRQ_MASK;  in uart_b91_irq_rx_enable()
466 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_rx_disable()  local
468 	uart->ctrl0 &= ~UART_RX_IRQ_MASK;  in uart_b91_irq_rx_disable()
474 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_rx_ready()  local
476 	return (uart_b91_get_rx_bufcnt(uart) > 0) ? 1 : 0;  in uart_b91_irq_rx_ready()
482 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_err_enable()  local
484 	uart->rxtimeout |= UART_ERR_IRQ_MASK;  in uart_b91_irq_err_enable()
490 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_err_disable()  local
492 	uart->rxtimeout &= ~UART_ERR_IRQ_MASK;  in uart_b91_irq_err_disable()
498 	volatile struct uart_b91_t *uart = GET_UART(dev);  in uart_b91_irq_is_pending()  local
500 	return ((uart->status & UART_IRQ_STATUS) != 0) ? 1 : 0;  in uart_b91_irq_is_pending()