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
serial_in(vaddr_t addr,uint8_t io_width)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
serial_out(vaddr_t addr,uint8_t io_width,int ch)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