39 	struct serial_device* uart = (struct serial_device*) dev->user_data;  in rt_serial_init()  local
46 			rt_memset(uart->int_rx->rx_buffer, 0,  in rt_serial_init()
47 				sizeof(uart->int_rx->rx_buffer));  in rt_serial_init()
48 			uart->int_rx->read_index = uart->int_rx->save_index = 0;  in rt_serial_init()
53 			rt_memset(uart->int_tx->tx_buffer, 0,  in rt_serial_init()
54 				sizeof(uart->int_tx->tx_buffer));  in rt_serial_init()
55 			uart->int_tx->write_index = uart->int_tx->save_index = 0;  in rt_serial_init()
65 static void rt_serial_savechar(struct serial_device* uart, char ch)  in rt_serial_savechar()  argument
72 	uart->int_rx->rx_buffer[uart->int_rx->save_index] = ch;  in rt_serial_savechar()
73 	uart->int_rx->save_index ++;  in rt_serial_savechar()
74 	if (uart->int_rx->save_index >= UART_RX_BUFFER_SIZE)  in rt_serial_savechar()
75 		uart->int_rx->save_index = 0;  in rt_serial_savechar()
78 	if (uart->int_rx->save_index == uart->int_rx->read_index)  in rt_serial_savechar()
80 		uart->int_rx->read_index ++;  in rt_serial_savechar()
81 		if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)  in rt_serial_savechar()
82 			uart->int_rx->read_index = 0;  in rt_serial_savechar()
105 	struct serial_device* uart;  in rt_serial_read()  local
109 	uart = (struct serial_device*)dev->user_data;  in rt_serial_read()
118 			if (uart->int_rx->read_index != uart->int_rx->save_index)  in rt_serial_read()
120 				*ptr++ = uart->int_rx->rx_buffer[uart->int_rx->read_index];  in rt_serial_read()
126 				uart->int_rx->read_index ++;  in rt_serial_read()
127 				if (uart->int_rx->read_index >= UART_RX_BUFFER_SIZE)  in rt_serial_read()
128 					uart->int_rx->read_index = 0;  in rt_serial_read()
146 			while (uart->uart_device->lsr & USTAT_RCV_READY)  in rt_serial_read()
148 				*ptr = uart->uart_device->dlbl_fifo.txfifo & 0xff;  in rt_serial_read()
163 	struct serial_device* uart;  in rt_serial_write()  local
167 	uart = (struct serial_device*)dev->user_data;  in rt_serial_write()
172 		while (uart->int_tx->save_index != uart->int_tx->write_index)  in rt_serial_write()
175 			uart->int_tx->tx_buffer[uart->int_tx->save_index] = *ptr++;  in rt_serial_write()
180 			uart->int_tx->save_index ++;  in rt_serial_write()
183 			if (uart->int_tx->save_index >= UART_TX_BUFFER_SIZE)  in rt_serial_write()
184 				uart->int_tx->save_index = 0;  in rt_serial_write()
202 				while (!(uart->uart_device->lsr & USTAT_TXB_EMPTY));  in rt_serial_write()
203 				uart->uart_device->dlbl_fifo.txfifo = '\r';  in rt_serial_write()
206 			while (!(uart->uart_device->lsr & USTAT_TXB_EMPTY));  in rt_serial_write()
207 			uart->uart_device->dlbl_fifo.txfifo = (*ptr & 0x1FF);  in rt_serial_write()
264 	struct serial_device* uart = (struct serial_device*) device->user_data;  in rt_hw_serial_isr()  local
270 	while (uart->uart_device->lsr & USTAT_RCV_READY)  in rt_hw_serial_isr()
272 		rt_serial_savechar(uart, uart->uart_device->dlbl_fifo.rxfifo & 0xff);  in rt_hw_serial_isr()
281 		rx_length = uart->int_rx->read_index > uart->int_rx->save_index ?  in rt_hw_serial_isr()
282 			UART_RX_BUFFER_SIZE - uart->int_rx->read_index + uart->int_rx->save_index :  in rt_hw_serial_isr()
283 			uart->int_rx->save_index - uart->int_rx->read_index;  in rt_hw_serial_isr()