1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (C) 2015 Freescale Semiconductor, Inc. 4 * Copyright (c) 2020, Linaro Limited 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 #ifndef __DRIVERS_NS16550_H 30 #define __DRIVERS_NS16550_H 31 32 #include <drivers/serial.h> 33 #include <io.h> 34 #include <types_ext.h> 35 36 #define NS16550_UART_REG_SIZE 0x1000 37 38 #define IO_WIDTH_U8 0 39 #define IO_WIDTH_U32 1 40 41 struct ns16550_data { 42 struct io_pa_va base; 43 struct serial_chip chip; 44 uint8_t io_width; 45 uint8_t reg_shift; 46 }; 47 48 static inline unsigned int serial_in(vaddr_t addr, uint8_t io_width) 49 { 50 if (io_width == IO_WIDTH_U32) 51 return io_read32(addr); 52 else 53 return io_read8(addr); 54 } 55 56 static inline void serial_out(vaddr_t addr, uint8_t io_width, int ch) 57 { 58 if (io_width == IO_WIDTH_U32) 59 io_write32(addr, ch); 60 else 61 io_write8(addr, ch); 62 } 63 64 void ns16550_init(struct ns16550_data *pd, paddr_t base, uint8_t io_width, 65 uint8_t reg_shift); 66 67 #endif /* __DRIVERS_NS16550_H */ 68