1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*-
* Copyright (c) 2003, 2004 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _DEV_UART_CPU_H_
#define _DEV_UART_CPU_H_
#include <sys/kdb.h>
#include <sys/lock.h>
#include <sys/mutex.h>
/*
* Low-level operations for use by console and/or debug port support.
*/
struct uart_ops {
int (*probe)(struct uart_bas *);
void (*init)(struct uart_bas *, int, int, int, int);
void (*term)(struct uart_bas *);
void (*putc)(struct uart_bas *, int);
int (*rxready)(struct uart_bas *);
int (*getc)(struct uart_bas *, struct mtx *);
};
extern bus_space_tag_t uart_bus_space_io;
extern bus_space_tag_t uart_bus_space_mem;
/*
* Console and debug port device info.
*/
struct uart_softc;
struct uart_devinfo {
SLIST_ENTRY(uart_devinfo) next;
struct uart_ops *ops;
struct uart_bas bas;
int baudrate;
int databits;
int stopbits;
int parity;
int type;
#define UART_DEV_CONSOLE 0
#define UART_DEV_DBGPORT 1
#define UART_DEV_KEYBOARD 2
int (*attach)(struct uart_softc*);
int (*detach)(struct uart_softc*);
void *cookie; /* Type dependent use. */
struct mtx *hwmtx;
};
int uart_cpu_eqres(struct uart_bas *, struct uart_bas *);
int uart_cpu_getdev(int, struct uart_devinfo *);
int uart_getenv(int, struct uart_devinfo *, struct uart_class *);
const char *uart_getname(struct uart_class *);
struct uart_ops *uart_getops(struct uart_class *);
int uart_getrange(struct uart_class *);
void uart_add_sysdev(struct uart_devinfo *);
/*
* Operations for low-level access to the UART. Primarily for use
* by console and debug port logic.
*/
static __inline void
uart_lock(struct mtx *hwmtx)
{
if (!kdb_active && hwmtx != NULL)
mtx_lock_spin(hwmtx);
}
static __inline void
uart_unlock(struct mtx *hwmtx)
{
if (!kdb_active && hwmtx != NULL)
mtx_unlock_spin(hwmtx);
}
static __inline int
uart_probe(struct uart_devinfo *di)
{
int res;
uart_lock(di->hwmtx);
res = di->ops->probe(&di->bas);
uart_unlock(di->hwmtx);
return (res);
}
static __inline void
uart_init(struct uart_devinfo *di)
{
uart_lock(di->hwmtx);
di->ops->init(&di->bas, di->baudrate, di->databits, di->stopbits,
di->parity);
uart_unlock(di->hwmtx);
}
static __inline void
uart_term(struct uart_devinfo *di)
{
uart_lock(di->hwmtx);
di->ops->term(&di->bas);
uart_unlock(di->hwmtx);
}
static __inline void
uart_putc(struct uart_devinfo *di, int c)
{
uart_lock(di->hwmtx);
di->ops->putc(&di->bas, c);
uart_unlock(di->hwmtx);
}
static __inline int
uart_rxready(struct uart_devinfo *di)
{
int res;
uart_lock(di->hwmtx);
res = di->ops->rxready(&di->bas);
uart_unlock(di->hwmtx);
return (res);
}
static __inline int
uart_poll(struct uart_devinfo *di)
{
int res;
uart_lock(di->hwmtx);
if (di->ops->rxready(&di->bas))
res = di->ops->getc(&di->bas, NULL);
else
res = -1;
uart_unlock(di->hwmtx);
return (res);
}
static __inline int
uart_getc(struct uart_devinfo *di)
{
return (di->ops->getc(&di->bas, di->hwmtx));
}
#endif /* _DEV_UART_CPU_H_ */
|
