10  * @brief Driver for UART on NXP IMX family processor.
21 #include <zephyr/drivers/uart.h>
47  * @brief Initialize UART channel
50  * It is assumed that this function is called only once per UART.
52  * @param dev UART device struct
58 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_init()  local
66 	/* Setup UART init structure */  in uart_imx_init()
81 	initConfig.clockRate  = get_uart_clock_freq(uart);  in uart_imx_init()
83 	UART_Init(uart, &initConfig);  in uart_imx_init()
85 	/* Set UART built-in hardware FIFO Watermark. */  in uart_imx_init()
86 	UART_SetTxFifoWatermark(uart, 2);  in uart_imx_init()
87 	UART_SetRxFifoWatermark(uart, 1);  in uart_imx_init()
96 	/* Set UART modem mode */  in uart_imx_init()
97 	UART_SetModemMode(uart, config->modem_mode);  in uart_imx_init()
99 	/* Finally, enable the UART module */  in uart_imx_init()
100 	UART_Enable(uart);  in uart_imx_init()
107 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_poll_out()  local
109 	while (!UART_GetStatusFlag(uart, uartStatusTxReady)) {  in uart_imx_poll_out()
111 	UART_Putchar(uart, c);  in uart_imx_poll_out()
116 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_poll_in()  local
119 	if (UART_GetStatusFlag(uart, uartStatusRxDataReady)) {  in uart_imx_poll_in()
120 		*c = UART_Getchar(uart);  in uart_imx_poll_in()
122 		if (UART_GetStatusFlag(uart, uartStatusRxOverrun)) {  in uart_imx_poll_in()
123 			UART_ClearStatusFlag(uart, uartStatusRxOverrun);  in uart_imx_poll_in()
137 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_fifo_fill()  local
141 		   UART_GetStatusFlag(uart, uartStatusTxReady)) {  in uart_imx_fifo_fill()
143 		UART_Putchar(uart, tx_data[num_tx]);  in uart_imx_fifo_fill()
153 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_fifo_read()  local
157 		   UART_GetStatusFlag(uart, uartStatusRxReady)) {  in uart_imx_fifo_read()
159 		rx_data[num_rx++] = UART_Getchar(uart);  in uart_imx_fifo_read()
162 	if (UART_GetStatusFlag(uart, uartStatusRxOverrun)) {  in uart_imx_fifo_read()
163 		UART_ClearStatusFlag(uart, uartStatusRxOverrun);  in uart_imx_fifo_read()
171 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_tx_enable()  local
173 	UART_SetIntCmd(uart, uartIntTxReady, true);  in uart_imx_irq_tx_enable()
178 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_tx_disable()  local
180 	UART_SetIntCmd(uart, uartIntTxReady, false);  in uart_imx_irq_tx_disable()
185 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_tx_ready()  local
187 	return UART_GetStatusFlag(uart, uartStatusTxReady);  in uart_imx_irq_tx_ready()
192 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_rx_enable()  local
194 	UART_SetIntCmd(uart, uartIntRxReady, true);  in uart_imx_irq_rx_enable()
199 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_rx_disable()  local
201 	UART_SetIntCmd(uart, uartIntRxReady, false);  in uart_imx_irq_rx_disable()
206 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_rx_ready()  local
208 	return UART_GetStatusFlag(uart, uartStatusRxReady);  in uart_imx_irq_rx_ready()
213 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_err_enable()  local
215 	UART_SetIntCmd(uart, uartIntParityError, true);  in uart_imx_irq_err_enable()
216 	UART_SetIntCmd(uart, uartIntFrameError, true);  in uart_imx_irq_err_enable()
221 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_err_disable()  local
223 	UART_SetIntCmd(uart, uartIntParityError, false);  in uart_imx_irq_err_disable()
224 	UART_SetIntCmd(uart, uartIntFrameError, false);  in uart_imx_irq_err_disable()
229 	UART_Type *uart = UART_STRUCT(dev);  in uart_imx_irq_is_pending()  local
231 	return UART_GetStatusFlag(uart, uartStatusRxReady) ||  in uart_imx_irq_is_pending()
232 		UART_GetStatusFlag(uart, uartStatusTxReady);  in uart_imx_irq_is_pending()
255  * Note: imx UART Tx interrupts when ready to send; Rx interrupts when char