1 /* stellarisUartDrv.c - Stellaris UART driver */
12  * @brief Driver for Stellaris UART
14  * Driver for Stellaris UART found namely on TI LM3S6965 board. It is similar to
16  * It is also register-compatible with the UART found on TI CC2650 SoC,
28 #include <zephyr/drivers/uart.h>
34 /* Stellaris UART module */
72 	volatile struct _uart *uart;  member
120  * This routine set the given baud rate for the UART.
122  * @param dev UART device struct
150 	config->uart->ibrd = (uint16_t)(brdi & 0xffff); /* 16 bits */  in baudrate_set()
151 	config->uart->fbrd = (uint8_t)(brdf & 0x3f);    /* 6 bits */  in baudrate_set()
155  * @brief Enable the UART
157  * This routine enables the given UART.
159  * @param dev UART device struct
165 	config->uart->ctl |= UARTCTL_UARTEN;  in enable()
169  * @brief Disable the UART
171  * This routine disables the given UART.
173  * @param dev UART device struct
179 	config->uart->ctl &= ~UARTCTL_UARTEN;  in disable()
182 	while (config->uart->fr & UARTFR_BUSY) {  in disable()
186 	config->uart->lcrh &= ~UARTLCRH_FEN;  in disable()
200  * @brief Set the default UART line controls
202  * This routine sets the given UART's line controls to their default settings.
204  * @param dev UART device struct
210 	config->uart->lcrh = LINE_CONTROL_DEFAULTS;  in line_control_defaults_set()
214  * @brief Initialize UART channel
217  * It is assumed that this function is called only once per UART.
219  * @param dev UART device struct
241  * @brief Get the UART transmit ready status
243  * This routine returns the given UART's transmit ready status.
245  * @param dev UART device struct
253 	return (config->uart->fr & UARTFR_TXFE);  in poll_tx_ready()
259  * @param dev UART device struct
269 	if (config->uart->fr & UARTFR_RXFE) {  in uart_stellaris_poll_in()
274 	*c = (unsigned char)config->uart->dr;  in uart_stellaris_poll_in()
285  * @param dev UART device struct
297 	config->uart->dr = (uint32_t)c;  in uart_stellaris_poll_out()
305  * @param dev UART device struct
318 	while ((len - num_tx > 0) && ((config->uart->fr & UARTFR_TXFF) == 0U)) {  in uart_stellaris_fifo_fill()
319 		config->uart->dr = (uint32_t)tx_data[num_tx++];  in uart_stellaris_fifo_fill()
328  * @param dev UART device struct
341 	while ((size - num_rx > 0) && ((config->uart->fr & UARTFR_RXFE) == 0U)) {  in uart_stellaris_fifo_read()
342 		rx_data[num_rx++] = (uint8_t)config->uart->dr;  in uart_stellaris_fifo_read()
351  * @param dev UART device struct
374 		saved_ctl = config->uart->ctl;  in uart_stellaris_irq_tx_enable()
375 		saved_ibrd = config->uart->ibrd;  in uart_stellaris_irq_tx_enable()
376 		saved_fbrd = config->uart->fbrd;  in uart_stellaris_irq_tx_enable()
380 		config->uart->fbrd = 0U;  in uart_stellaris_irq_tx_enable()
381 		config->uart->ibrd = 1U;  in uart_stellaris_irq_tx_enable()
382 		config->uart->lcrh = 0U;  in uart_stellaris_irq_tx_enable()
383 		config->uart->ctl = (UARTCTL_UARTEN | UARTCTL_TXEN | UARTCTL_LBE);  in uart_stellaris_irq_tx_enable()
384 		config->uart->dr = 0U;  in uart_stellaris_irq_tx_enable()
386 		while (config->uart->fr & UARTFR_BUSY) {  in uart_stellaris_irq_tx_enable()
391 		config->uart->ibrd = saved_ibrd;  in uart_stellaris_irq_tx_enable()
392 		config->uart->fbrd = saved_fbrd;  in uart_stellaris_irq_tx_enable()
394 		config->uart->ctl = saved_ctl;  in uart_stellaris_irq_tx_enable()
397 	config->uart->im |= UARTTIM_TXIM;  in uart_stellaris_irq_tx_enable()
403  * @param dev UART device struct
409 	config->uart->im &= ~UARTTIM_TXIM;  in uart_stellaris_irq_tx_disable()
415  * @param dev UART device struct
423 	return ((config->uart->mis & UARTMIS_TXMIS) == UARTMIS_TXMIS);  in uart_stellaris_irq_tx_ready()
429  * @param dev UART device struct
435 	config->uart->im |= UARTTIM_RXIM;  in uart_stellaris_irq_rx_enable()
441  * @param dev UART device struct
447 	config->uart->im &= ~UARTTIM_RXIM;  in uart_stellaris_irq_rx_disable()
453  * @param dev UART device struct
461 	return ((config->uart->mis & UARTMIS_RXMIS) == UARTMIS_RXMIS);  in uart_stellaris_irq_rx_ready()
467  * @param dev UART device struct
473 	config->uart->im |= (UARTTIM_RTIM | UARTTIM_FEIM | UARTTIM_PEIM |  in uart_stellaris_irq_err_enable()
480  * @param dev UART device struct
486 	config->uart->im &= ~(UARTTIM_RTIM | UARTTIM_FEIM | UARTTIM_PEIM |  in uart_stellaris_irq_err_disable()
493  * @param dev UART device struct
502 	return ((config->uart->mis & (UARTMIS_RXMIS | UARTMIS_TXMIS)) ? 1 : 0);  in uart_stellaris_irq_is_pending()
508  * @param dev UART device struct
520  * @param dev UART device struct
583 	.uart = (volatile struct _uart *)DT_INST_REG_ADDR(0),
622 	.uart = (volatile struct _uart *)DT_INST_REG_ADDR(1),
661 	.uart = (volatile struct _uart *)DT_INST_REG_ADDR(2),