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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
/*
* (C) Copyright 2008-2011 Michal Simek <monstr@monstr.eu>
* Clean driver and add xilinx constant from header file
*
* (C) Copyright 2004 Atmark Techno, Inc.
* Yasushi SHOJI <yashi@atmark-techno.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <common.h>
#include <asm/io.h>
#include <linux/compiler.h>
#include <serial.h>
#define SR_TX_FIFO_FULL 0x08 /* transmit FIFO full */
#define SR_RX_FIFO_VALID_DATA 0x01 /* data in receive FIFO */
#define SR_RX_FIFO_FULL 0x02 /* receive FIFO full */
struct uartlite {
unsigned int rx_fifo;
unsigned int tx_fifo;
unsigned int status;
};
static struct uartlite *userial_ports[4] = {
#ifdef XILINX_UARTLITE_BASEADDR
[0] = (struct uartlite *)XILINX_UARTLITE_BASEADDR,
#endif
#ifdef XILINX_UARTLITE_BASEADDR1
[1] = (struct uartlite *)XILINX_UARTLITE_BASEADDR1,
#endif
#ifdef XILINX_UARTLITE_BASEADDR2
[2] = (struct uartlite *)XILINX_UARTLITE_BASEADDR2,
#endif
#ifdef XILINX_UARTLITE_BASEADDR3
[3] = (struct uartlite *)XILINX_UARTLITE_BASEADDR3
#endif
};
void uartlite_serial_putc(const char c, const int port)
{
struct uartlite *regs = userial_ports[port];
if (c == '\n')
uartlite_serial_putc('\r', port);
while (in_be32(®s->status) & SR_TX_FIFO_FULL)
;
out_be32(®s->tx_fifo, c & 0xff);
}
void uartlite_serial_puts(const char *s, const int port)
{
while (*s)
uartlite_serial_putc(*s++, port);
}
int uartlite_serial_getc(const int port)
{
struct uartlite *regs = userial_ports[port];
while (!(in_be32(®s->status) & SR_RX_FIFO_VALID_DATA))
;
return in_be32(®s->rx_fifo) & 0xff;
}
int uartlite_serial_tstc(const int port)
{
struct uartlite *regs = userial_ports[port];
return in_be32(®s->status) & SR_RX_FIFO_VALID_DATA;
}
static int uartlite_serial_init(const int port)
{
if (userial_ports[port])
return 0;
return -1;
}
#if !defined(CONFIG_SERIAL_MULTI)
int serial_init(void)
{
return uartlite_serial_init(0);
}
void serial_setbrg(void)
{
/* FIXME: what's this for? */
}
void serial_putc(const char c)
{
uartlite_serial_putc(c, 0);
}
void serial_puts(const char *s)
{
uartlite_serial_puts(s, 0);
}
int serial_getc(void)
{
return uartlite_serial_getc(0);
}
int serial_tstc(void)
{
return uartlite_serial_tstc(0);
}
#endif
#if defined(CONFIG_SERIAL_MULTI)
/* Multi serial device functions */
#define DECLARE_ESERIAL_FUNCTIONS(port) \
int userial##port##_init(void) \
{ return uartlite_serial_init(port); } \
void userial##port##_setbrg(void) {} \
int userial##port##_getc(void) \
{ return uartlite_serial_getc(port); } \
int userial##port##_tstc(void) \
{ return uartlite_serial_tstc(port); } \
void userial##port##_putc(const char c) \
{ uartlite_serial_putc(c, port); } \
void userial##port##_puts(const char *s) \
{ uartlite_serial_puts(s, port); }
/* Serial device descriptor */
#define INIT_ESERIAL_STRUCTURE(port, __name) { \
.name = __name, \
.start = userial##port##_init, \
.stop = NULL, \
.setbrg = userial##port##_setbrg, \
.getc = userial##port##_getc, \
.tstc = userial##port##_tstc, \
.putc = userial##port##_putc, \
.puts = userial##port##_puts, \
}
DECLARE_ESERIAL_FUNCTIONS(0);
struct serial_device uartlite_serial0_device =
INIT_ESERIAL_STRUCTURE(0, "ttyUL0");
DECLARE_ESERIAL_FUNCTIONS(1);
struct serial_device uartlite_serial1_device =
INIT_ESERIAL_STRUCTURE(1, "ttyUL1");
DECLARE_ESERIAL_FUNCTIONS(2);
struct serial_device uartlite_serial2_device =
INIT_ESERIAL_STRUCTURE(2, "ttyUL2");
DECLARE_ESERIAL_FUNCTIONS(3);
struct serial_device uartlite_serial3_device =
INIT_ESERIAL_STRUCTURE(3, "ttyUL3");
__weak struct serial_device *default_serial_console(void)
{
if (userial_ports[0])
return &uartlite_serial0_device;
if (userial_ports[1])
return &uartlite_serial1_device;
if (userial_ports[2])
return &uartlite_serial2_device;
if (userial_ports[3])
return &uartlite_serial3_device;
return NULL;
}
#endif /* CONFIG_SERIAL_MULTI */
|
