2  * @brief UART Driver for interacting with host serial ports
4  * @note  Driver can open and send characters to the host serial ports (such as /dev/ttyUSB0 or
14  * SPDX-License-Identifier: Apache-2.0
40 	/* Serial port set from the command line. If NULL, it was not set. */
77 	bottom_cfg->baudrate = cfg->baudrate;  in native_tty_conv_to_bottom_cfg()
79 	switch (cfg->parity) {  in native_tty_conv_to_bottom_cfg()
81 		bottom_cfg->parity = NTB_PARITY_NONE;  in native_tty_conv_to_bottom_cfg()
84 		bottom_cfg->parity = NTB_PARITY_ODD;  in native_tty_conv_to_bottom_cfg()
87 		bottom_cfg->parity = NTB_PARITY_EVEN;  in native_tty_conv_to_bottom_cfg()
90 		return -ENOTSUP;  in native_tty_conv_to_bottom_cfg()
93 	switch (cfg->stop_bits) {  in native_tty_conv_to_bottom_cfg()
95 		bottom_cfg->stop_bits = NTB_STOP_BITS_1;  in native_tty_conv_to_bottom_cfg()
98 		bottom_cfg->stop_bits = NTB_STOP_BITS_2;  in native_tty_conv_to_bottom_cfg()
101 		return -ENOTSUP;  in native_tty_conv_to_bottom_cfg()
104 	switch (cfg->data_bits) {  in native_tty_conv_to_bottom_cfg()
106 		bottom_cfg->data_bits = NTB_DATA_BITS_5;  in native_tty_conv_to_bottom_cfg()
109 		bottom_cfg->data_bits = NTB_DATA_BITS_6;  in native_tty_conv_to_bottom_cfg()
112 		bottom_cfg->data_bits = NTB_DATA_BITS_7;  in native_tty_conv_to_bottom_cfg()
115 		bottom_cfg->data_bits = NTB_DATA_BITS_8;  in native_tty_conv_to_bottom_cfg()
118 		return -ENOTSUP;  in native_tty_conv_to_bottom_cfg()
121 	if (cfg->flow_ctrl != UART_CFG_FLOW_CTRL_NONE) {  in native_tty_conv_to_bottom_cfg()
123 		return -ENOTSUP;  in native_tty_conv_to_bottom_cfg()
126 	bottom_cfg->flow_ctrl = NTB_FLOW_CTRL_NONE;  in native_tty_conv_to_bottom_cfg()
132  * @brief Output a character towards the serial port
139 	struct native_tty_data *data = dev->data;  in native_tty_uart_poll_out()
141 	int ret = nsi_host_write(data->fd, &out_char, 1);  in native_tty_uart_poll_out()
143 	if (ret == -1) {  in native_tty_uart_poll_out()
144 		ERROR("Could not write to %s\n", data->serial_port);  in native_tty_uart_poll_out()
155  * @retval -1	If no character was available to read.
159 	struct native_tty_data *data = dev->data;  in native_tty_uart_poll_in()
161 	return nsi_host_read(data->fd, p_char, 1) > 0 ? 0 : -1;  in native_tty_uart_poll_in()
166 	int fd = ((struct native_tty_data *)dev->data)->fd;  in native_tty_configure()
183 	struct native_tty_data *data = dev->data;  in native_tty_uart_fifo_fill()
185 	return nsi_host_write(data->fd, (void *)tx_data, size);  in native_tty_uart_fifo_fill()
192 	struct native_tty_data *data = dev->data;  in native_tty_uart_fifo_read()
194 	return nsi_host_read(data->fd, rx_data, size);  in native_tty_uart_fifo_read()
199 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_tx_ready()
201 	return data->tx_irq_enabled ? 1 : 0;  in native_tty_uart_irq_tx_ready()
212 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_tx_enable()
214 	data->tx_irq_enabled = true;  in native_tty_uart_irq_tx_enable()
219 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_tx_disable()
221 	data->tx_irq_enabled = false;  in native_tty_uart_irq_tx_disable()
226 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_rx_enable()
228 	data->rx_irq_enabled = true;  in native_tty_uart_irq_rx_enable()
233 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_rx_disable()
235 	data->rx_irq_enabled = false;  in native_tty_uart_irq_rx_disable()
240 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_rx_ready()
242 	if (data->rx_irq_enabled && native_tty_poll_bottom(data->fd) == 1) {  in native_tty_uart_irq_rx_ready()
262 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_handler()
264 	if (data->callback) {  in native_tty_uart_irq_handler()
265 		data->callback(dev, data->cb_data);  in native_tty_uart_irq_handler()
279 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_function()
282 		if (data->rx_irq_enabled) {  in native_tty_uart_irq_function()
283 			int ret = native_tty_poll_bottom(data->fd);  in native_tty_uart_irq_function()
293 		if (data->tx_irq_enabled) {  in native_tty_uart_irq_function()
296 		if (data->tx_irq_enabled == false && data->rx_irq_enabled == false) {  in native_tty_uart_irq_function()
306 	struct native_tty_data *data = dev->data;  in native_tty_uart_irq_callback_set()
308 	data->callback = cb;  in native_tty_uart_irq_callback_set()
309 	data->cb_data = cb_data;  in native_tty_uart_irq_callback_set()
314 	/* Create a thread which will wait for data - replacement for IRQ */  in native_tty_irq_init()
324 	struct native_tty_data *data = dev->data;  in native_tty_serial_init()
325 	struct uart_config uart_config = ((struct native_tty_config *)dev->config)->uart_config;  in native_tty_serial_init()
331 	if (data->cmd_serial_port) {  in native_tty_serial_init()
332 		data->serial_port = data->cmd_serial_port;  in native_tty_serial_init()
339 	if (data->cmd_baudrate != UINT32_MAX) {  in native_tty_serial_init()
340 		uart_config.baudrate = data->cmd_baudrate;  in native_tty_serial_init()
343 	/* Serial port needs to be set either in the devicetree or provided via command line  in native_tty_serial_init()
346 	if (!data->serial_port) {  in native_tty_serial_init()
347 		ERROR("%s: path to the serial port was not set.\n", dev->name);  in native_tty_serial_init()
350 	/* Try to open a serial port as with read/write access, also prevent serial port  in native_tty_serial_init()
354 	data->fd = native_tty_open_tty_bottom(data->serial_port);  in native_tty_serial_init()
357 		ERROR("%s: could not configure serial port %s\n", dev->name, data->serial_port);  in native_tty_serial_init()
360 	posix_print_trace("%s connected to the serial port: %s\n", dev->name, data->serial_port);  in native_tty_serial_init()
421 		.descript = "Set a serial port for " INST_NAME(inst) " uart device, "		   \
435  * @brief Adds command line options for setting serial port and baud rate for each uart
452  * @brief Cleans up any open serial ports on the exit.