1 /* 2 * Copyright (c) 2023 Intel Corporation 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 /** 8 * Header file for the INTEL LW UART 9 */ 10 11 #ifndef ZEPHYR_DRIVERS_SERIAL_UART_INTEL_LW_H_ 12 #define ZEPHYR_DRIVERS_SERIAL_UART_INTEL_LW_H_ 13 14 /* End of packet feature. 15 * Driver will trigger interrupt upon receiving end of package character. 16 * Please enable CONFIG_UART_INTEL_LW_EOP to use this feature. 17 * Use the api: uart_drv_cmd with CMD_ENABLE_EOP to enable the feature. 18 * This cmd will write the ip register and also set a flag to the driver. 19 * The flag will modify uart_irq_callback_user_data_set 20 * to set call back function for eop interrupt. 21 * Flag is cleared after uart_irq_callback_user_data_set is called. 22 */ 23 #define CMD_ENABLE_EOP 0x01 24 #define CMD_DISABLE_EOP 0x02 25 26 /* Transmit break feature. 27 * Use uart_drv_cmd with CMD_TRBK_EN to break ongoing transmit. 28 * After this cmd, uart is unable to transmit any data. 29 * Please use CMD_TRBK_DIS to resume normal operation. 30 * Please also call uart_intel_lw_err_check, to clear the error caused 31 * by transmit break. 32 */ 33 #define CMD_TRBK_EN 0x03 34 #define CMD_TRBK_DIS 0x04 35 36 /* This driver supports interrupt driven api. 37 * Polling for data under normal operation, might cause unexpected behaviour. 38 * If users wish to poll for data, please use the api: 39 * uart_drv_cmd with CMD_POLL_ASSERT_RTS before polling out/in. 40 * Then use CMD_POLL_DEASSERT_RTS to resume normal operation after polling. 41 */ 42 #define CMD_POLL_ASSERT_RTS 0x05 43 #define CMD_POLL_DEASSERT_RTS 0x06 44 45 #endif /* ZEPHYR_DRIVERS_SERIAL_UART_INTEL_LW_H_ */ 46
