uart_cpu.h revision 127215 
1/*
2 * Copyright (c) 2003, 2004 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/uart/uart_cpu.h 127215 2004-03-20 02:14:02Z marcel $
27 */
28
29#ifndef _DEV_UART_CPU_H_
30#define _DEV_UART_CPU_H_
31
32/*
33 * Low-level operations for use by console and/or debug port support.
34 */
35struct uart_ops {
36	int (*probe)(struct uart_bas *);
37	void (*init)(struct uart_bas *, int, int, int, int);
38	void (*term)(struct uart_bas *);
39	void (*putc)(struct uart_bas *, int);
40	int (*poll)(struct uart_bas *);
41	int (*getc)(struct uart_bas *);
42};
43
44extern struct uart_ops uart_i8251_ops;
45extern struct uart_ops uart_ns8250_ops;
46extern struct uart_ops uart_sab82532_ops;
47extern struct uart_ops uart_z8530_ops;
48
49extern bus_space_tag_t uart_bus_space_io;
50extern bus_space_tag_t uart_bus_space_mem;
51
52/*
53 * Console and debug port device info.
54 */
55struct uart_softc;
56struct uart_devinfo {
57	SLIST_ENTRY(uart_devinfo) next;
58	struct uart_ops ops;
59	struct uart_bas bas;
60	int	baudrate;
61	int	databits;
62	int	stopbits;
63	int	parity;
64	int	type;
65#define	UART_DEV_CONSOLE	0
66#define	UART_DEV_DBGPORT	1
67#define	UART_DEV_KEYBOARD	2
68	int	(*attach)(struct uart_softc*);
69	int	(*detach)(struct uart_softc*);
70	void	*cookie;		/* Type dependent use. */
71};
72
73int uart_cpu_eqres(struct uart_bas *, struct uart_bas *);
74int uart_cpu_getdev(int, struct uart_devinfo *);
75int uart_getenv(int, struct uart_devinfo *);
76
77void uart_add_sysdev(struct uart_devinfo *);
78
79/*
80 * Operations for low-level access to the UART. Primarily for use
81 * by console and debug port logic.
82 */
83static __inline int
84uart_probe(struct uart_devinfo *di)
85{
86	return (di->ops.probe(&di->bas));
87}
88
89static __inline void
90uart_init(struct uart_devinfo *di)
91{
92	di->ops.init(&di->bas, di->baudrate, di->databits, di->stopbits,
93	    di->parity);
94}
95
96static __inline void
97uart_term(struct uart_devinfo *di)
98{
99	di->ops.term(&di->bas);
100}
101
102static __inline void
103uart_putc(struct uart_devinfo *di, int c)
104{
105	di->ops.putc(&di->bas, c);
106}
107
108static __inline int
109uart_poll(struct uart_devinfo *di)
110{
111	return (di->ops.poll(&di->bas));
112}
113
114static __inline int
115uart_getc(struct uart_devinfo *di)
116{
117	return (di->ops.getc(&di->bas));
118}
119
120#endif /* _DEV_UART_CPU_H_ */
121