4  * SPDX-License-Identifier: Apache-2.0
11 #include <zephyr/drivers/uart.h>
20  * UART driver for POSIX ARCH based boards.
23  * For the first UART:
31  * more like a real UART.
37 static int np_uart_stdin_poll_in(const struct device *dev,
39 static int np_uart_tty_poll_in(const struct device *dev,
41 static void np_uart_poll_out(const struct device *dev,
55 static DEVICE_API(uart, np_uart_driver_api_0) = {
67 static DEVICE_API(uart, np_uart_driver_api_1) = {
81  * @param dev UART_0 device struct
85 static int np_uart_0_init(const struct device *dev)  in np_uart_0_init()  argument
89 	d = (struct native_uart_status *)dev->data;  in np_uart_0_init()
92 		int tty_fn = np_uart_open_ptty(dev->name, auto_attach_cmd, auto_attach, wait_pts);  in np_uart_0_init()
94 		d->in_fd = tty_fn;  in np_uart_0_init()
95 		d->out_fd = tty_fn;  in np_uart_0_init()
97 		d->in_fd  = np_uart_ptty_get_stdin_fileno();  in np_uart_0_init()
98 		d->out_fd = np_uart_ptty_get_stdout_fileno();  in np_uart_0_init()
106  * Initialize the 2nd UART port.
109 static int np_uart_1_init(const struct device *dev)  in np_uart_1_init()  argument
114 	d = (struct native_uart_status *)dev->data;  in np_uart_1_init()
116 	tty_fn = np_uart_open_ptty(dev->name, NULL, false, wait_pts);  in np_uart_1_init()
118 	d->in_fd = tty_fn;  in np_uart_1_init()
119 	d->out_fd = tty_fn;  in np_uart_1_init()
128  * @param dev UART device struct
131 static void np_uart_poll_out(const struct device *dev,  in np_uart_poll_out()  argument
135 	struct native_uart_status *d = (struct native_uart_status *)dev->data;  in np_uart_poll_out()
140 			int rc = np_uart_slave_connected(d->out_fd);  in np_uart_poll_out()
152 	ret = nsi_host_write(d->out_fd, &out_char, 1);  in np_uart_poll_out()
159  * @param dev UART device structure.
163  * @retval -1 If no character was available to read
165 static int __maybe_unused np_uart_stdin_poll_in(const struct device *dev, unsigned char *p_char)  in np_uart_stdin_poll_in()  argument
167 	int in_f = ((struct native_uart_status *)dev->data)->in_fd;  in np_uart_stdin_poll_in()
172 		return -1;  in np_uart_stdin_poll_in()
176 	if (rc == -2) {  in np_uart_stdin_poll_in()
178 		return -1;  in np_uart_stdin_poll_in()
187  * @param dev UART device structure.
191  * @retval -1 If no character was available to read
193 static int __maybe_unused np_uart_tty_poll_in(const struct device *dev, unsigned char *p_char)  in np_uart_tty_poll_in()  argument
195 	int n = -1;  in np_uart_tty_poll_in()
196 	int in_f = ((struct native_uart_status *)dev->data)->in_fd;  in np_uart_tty_poll_in()
199 	if (n == -1) {  in np_uart_tty_poll_in()
200 		return -1;  in np_uart_tty_poll_in()
237 		.descript = "Automatically attach to the UART terminal"  in np_add_uart_options()
254 		.descript = "Hold writes to the uart/pts until a client is connected/ready"  in np_add_uart_options()