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 NS16550_H
30 #define NS16550_H
31
32 #include <drivers/serial.h>
33 #include <io.h>
34 #include <types_ext.h>
35
36 #define IO_WIDTH_U8 0
37 #define IO_WIDTH_U32 1
38
39 struct ns16550_data {
40 struct io_pa_va base;
41 struct serial_chip chip;
42 uint8_t io_width;
43 uint8_t reg_shift;
44 };
45
serial_in(vaddr_t addr,uint8_t io_width)46 static inline unsigned int serial_in(vaddr_t addr, uint8_t io_width)
47 {
48 if (io_width == IO_WIDTH_U32)
49 return io_read32(addr);
50 else
51 return io_read8(addr);
52 }
53
serial_out(vaddr_t addr,uint8_t io_width,int ch)54 static inline void serial_out(vaddr_t addr, uint8_t io_width, int ch)
55 {
56 if (io_width == IO_WIDTH_U32)
57 io_write32(addr, ch);
58 else
59 io_write8(addr, ch);
60 }
61
62 void ns16550_init(struct ns16550_data *pd, paddr_t base, uint8_t io_width,
63 uint8_t reg_shift);
64
65 #endif /* NS16550_H */
66