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
|
/*
* Generic serial console support
*
* Author: Mark A. Greer <mgreer@mvista.com>
*
* Code in serial_edit_cmdline() copied from <file:arch/ppc/boot/simple/misc.c>
* and was written by Matt Porter <mporter@kernel.crashing.org>.
*
* 2001,2006 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "string.h"
#include "stdio.h"
#include "io.h"
#include "ops.h"
static int serial_open(void)
{
struct serial_console_data *scdp = console_ops.data;
return scdp->open();
}
static void serial_write(const char *buf, int len)
{
struct serial_console_data *scdp = console_ops.data;
while (*buf != '\0')
scdp->putc(*buf++);
}
static void serial_edit_cmdline(char *buf, int len)
{
int timer = 0, count;
char ch, *cp;
struct serial_console_data *scdp = console_ops.data;
cp = buf;
count = strlen(buf);
cp = &buf[count];
count++;
while (timer++ < 5*1000) {
if (scdp->tstc()) {
while (((ch = scdp->getc()) != '\n') && (ch != '\r')) {
/* Test for backspace/delete */
if ((ch == '\b') || (ch == '\177')) {
if (cp != buf) {
cp--;
count--;
printf("\b \b");
}
/* Test for ^x/^u (and wipe the line) */
} else if ((ch == '\030') || (ch == '\025')) {
while (cp != buf) {
cp--;
count--;
printf("\b \b");
}
} else if (count < len) {
*cp++ = ch;
count++;
scdp->putc(ch);
}
}
break; /* Exit 'timer' loop */
}
udelay(1000); /* 1 msec */
}
*cp = 0;
}
static void serial_close(void)
{
struct serial_console_data *scdp = console_ops.data;
if (scdp->close)
scdp->close();
}
static void *serial_get_stdout_devp(void)
{
void *devp;
char devtype[MAX_PROP_LEN];
char path[MAX_PATH_LEN];
devp = finddevice("/chosen");
if (devp == NULL)
goto err_out;
if (getprop(devp, "linux,stdout-path", path, MAX_PATH_LEN) > 0) {
devp = finddevice(path);
if (devp == NULL)
goto err_out;
if ((getprop(devp, "device_type", devtype, sizeof(devtype)) > 0)
&& !strcmp(devtype, "serial"))
return devp;
}
err_out:
return NULL;
}
static struct serial_console_data serial_cd;
/* Node's "compatible" property determines which serial driver to use */
int serial_console_init(void)
{
void *devp;
int rc = -1;
devp = serial_get_stdout_devp();
if (devp == NULL)
goto err_out;
if (dt_is_compatible(devp, "ns16550"))
rc = ns16550_console_init(devp, &serial_cd);
else if (dt_is_compatible(devp, "marvell,mpsc"))
rc = mpsc_console_init(devp, &serial_cd);
else if (dt_is_compatible(devp, "fsl,cpm1-scc-uart") ||
dt_is_compatible(devp, "fsl,cpm1-smc-uart") ||
dt_is_compatible(devp, "fsl,cpm2-scc-uart") ||
dt_is_compatible(devp, "fsl,cpm2-smc-uart"))
rc = cpm_console_init(devp, &serial_cd);
else if (dt_is_compatible(devp, "mpc5200-psc-uart"))
rc = mpc5200_psc_console_init(devp, &serial_cd);
else if (dt_is_compatible(devp, "xlnx,opb-uartlite-1.00.b") ||
dt_is_compatible(devp, "xlnx,xps-uartlite-1.00.a"))
rc = uartlite_console_init(devp, &serial_cd);
/* Add other serial console driver calls here */
if (!rc) {
console_ops.open = serial_open;
console_ops.write = serial_write;
console_ops.close = serial_close;
console_ops.data = &serial_cd;
if (serial_cd.getc)
console_ops.edit_cmdline = serial_edit_cmdline;
return 0;
}
err_out:
return -1;
}
|
