5  * SPDX-License-Identifier: Apache-2.0
19 #include <zephyr/drivers/uart.h>
34 	const struct device *dev;  member
47 static void eswifi_iface_uart_flush(struct eswifi_uart_data *uart)  in eswifi_iface_uart_flush()  argument
51 	while (uart_fifo_read(uart->dev, &c, 1) > 0) {  in eswifi_iface_uart_flush()
59 	struct eswifi_uart_data *uart = &eswifi_uart0; /* Static instance */  in eswifi_iface_uart_isr()  local
67 	while (uart_irq_update(uart->dev) &&  in eswifi_iface_uart_isr()
68 	       uart_irq_rx_ready(uart->dev)) {  in eswifi_iface_uart_isr()
70 			partial_size = ring_buf_put_claim(&uart->rx_rb, &dst,  in eswifi_iface_uart_isr()
75 			eswifi_iface_uart_flush(uart);  in eswifi_iface_uart_isr()
79 		rx = uart_fifo_read(uart->dev, dst, partial_size);  in eswifi_iface_uart_isr()
86 		partial_size -= rx;  in eswifi_iface_uart_isr()
89 	ring_buf_put_finish(&uart->rx_rb, total_size);  in eswifi_iface_uart_isr()
110 static int eswifi_uart_get_resp(struct eswifi_uart_data *uart)  in eswifi_uart_get_resp()  argument
114 	while (ring_buf_get(&uart->rx_rb, &c, 1) > 0) {  in eswifi_uart_get_resp()
116 			get_fsm_char(uart->fsm), c, c);  in eswifi_uart_get_resp()
118 		if (uart->rx_buf_size > 0) {  in eswifi_uart_get_resp()
119 			uart->rx_buf[uart->rx_count++] = c;  in eswifi_uart_get_resp()
121 			if (uart->rx_count == uart->rx_buf_size) {  in eswifi_uart_get_resp()
122 				return -ENOMEM;  in eswifi_uart_get_resp()
126 		switch (uart->fsm) {  in eswifi_uart_get_resp()
129 				uart->fsm = ESWIFI_UART_FSM_WAIT_LF;  in eswifi_uart_get_resp()
134 				uart->fsm = ESWIFI_UART_FSM_WAIT_MARK;  in eswifi_uart_get_resp()
136 				uart->fsm = ESWIFI_UART_FSM_WAIT_CR;  in eswifi_uart_get_resp()
141 				uart->fsm = ESWIFI_UART_FSM_WAIT_SPACE;  in eswifi_uart_get_resp()
143 				uart->fsm = ESWIFI_UART_FSM_WAIT_LF;  in eswifi_uart_get_resp()
145 				uart->fsm = ESWIFI_UART_FSM_WAIT_CR;  in eswifi_uart_get_resp()
150 				uart->fsm = ESWIFI_UART_FSM_END;  in eswifi_uart_get_resp()
152 				uart->fsm = ESWIFI_UART_FSM_WAIT_LF;  in eswifi_uart_get_resp()
154 				uart->fsm = ESWIFI_UART_FSM_WAIT_CR;  in eswifi_uart_get_resp()
165 static int eswifi_uart_wait_prompt(struct eswifi_uart_data *uart)  in eswifi_uart_wait_prompt()  argument
170 	while (--max_retries) {  in eswifi_uart_wait_prompt()
171 		err = eswifi_uart_get_resp(uart);  in eswifi_uart_wait_prompt()
173 			LOG_DBG("Err: 0x%08x - %d", err, err);  in eswifi_uart_wait_prompt()
177 		if (uart->fsm == ESWIFI_UART_FSM_END) {  in eswifi_uart_wait_prompt()
179 			return uart->rx_count;  in eswifi_uart_wait_prompt()
187 	return -ETIMEDOUT;  in eswifi_uart_wait_prompt()
193 	struct eswifi_uart_data *uart = eswifi->bus_data;  in eswifi_uart_request()  local
201 		uart_poll_out(uart->dev, cmd[count]);  in eswifi_uart_request()
204 	uart->fsm = ESWIFI_UART_FSM_WAIT_CR;  in eswifi_uart_request()
205 	uart->rx_count = 0;  in eswifi_uart_request()
206 	uart->rx_buf = rsp;  in eswifi_uart_request()
207 	uart->rx_buf_size = rlen;  in eswifi_uart_request()
209 	err = eswifi_uart_wait_prompt(uart);  in eswifi_uart_request()
212 		LOG_HEXDUMP_DBG(uart->rx_buf, uart->rx_count, "Stream");  in eswifi_uart_request()
220 	struct eswifi_uart_data *uart = &eswifi_uart0; /* Static instance */  in eswifi_uart_init()  local
222 	uart->dev = DEVICE_DT_GET(DT_INST_BUS(0));  in eswifi_uart_init()
223 	if (!device_is_ready(uart->dev)) {  in eswifi_uart_init()
225 		return -ENODEV;  in eswifi_uart_init()
228 	eswifi->bus_data = uart;  in eswifi_uart_init()
230 	uart_irq_rx_disable(uart->dev);  in eswifi_uart_init()
231 	uart_irq_tx_disable(uart->dev);  in eswifi_uart_init()
232 	eswifi_iface_uart_flush(uart);  in eswifi_uart_init()
233 	uart_irq_callback_set(uart->dev, eswifi_iface_uart_isr);  in eswifi_uart_init()
234 	uart_irq_rx_enable(uart->dev);  in eswifi_uart_init()
236 	ring_buf_init(&uart->rx_rb, sizeof(uart->iface_rb_buf),  in eswifi_uart_init()
237 		      uart->iface_rb_buf);  in eswifi_uart_init()