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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008
* Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de.
*/
#include <common.h>
#include <console.h>
#include <serial.h>
#include <malloc.h>
#if CONFIG_IS_ENABLED(CONSOLE_MUX)
void iomux_printdevs(const int console)
{
int i;
struct stdio_dev *dev;
for (i = 0; i < cd_count[console]; i++) {
dev = console_devices[console][i];
printf("%s ", dev->name);
}
printf("\n");
}
int iomux_match_device(struct stdio_dev **set, const int n, struct stdio_dev *sdev)
{
int i;
for (i = 0; i < n; i++)
if (sdev == set[i])
return i;
return -ENOENT;
}
/* This tries to preserve the old list if an error occurs. */
int iomux_doenv(const int console, const char *arg)
{
char *console_args, *temp, **start;
int i, j, io_flag, cs_idx, repeat;
struct stdio_dev **cons_set, **old_set;
struct stdio_dev *dev;
console_args = strdup(arg);
if (console_args == NULL)
return 1;
/*
* Check whether a comma separated list of devices was
* entered and count how many devices were entered.
* The array start[] has pointers to the beginning of
* each device name (up to MAX_CONSARGS devices).
*
* Have to do this twice - once to count the number of
* commas and then again to populate start.
*/
i = 0;
temp = console_args;
for (;;) {
/* There's always one entry more than the number of commas. */
i++;
temp = strchr(temp, ',');
if (temp == NULL)
break;
temp++;
}
start = (char **)malloc(i * sizeof(char *));
if (start == NULL) {
free(console_args);
return 1;
}
i = 0;
start[0] = console_args;
for (;;) {
temp = strchr(start[i++], ',');
if (temp == NULL)
break;
*temp = '\0';
start[i] = temp + 1;
}
cons_set = (struct stdio_dev **)calloc(i, sizeof(struct stdio_dev *));
if (cons_set == NULL) {
free(start);
free(console_args);
return 1;
}
io_flag = stdio_file_to_flags(console);
if (io_flag < 0) {
free(start);
free(console_args);
free(cons_set);
return 1;
}
cs_idx = 0;
for (j = 0; j < i; j++) {
/*
* Check whether the device exists and is valid.
* console_assign() also calls console_search_dev(),
* but I need the pointer to the device.
*/
dev = console_search_dev(io_flag, start[j]);
if (dev == NULL)
continue;
/*
* Prevent multiple entries for a device.
*/
repeat = iomux_match_device(cons_set, cs_idx, dev);
if (repeat >= 0)
continue;
/*
* Try assigning the specified device.
* This could screw up the console settings for apps.
*/
if (console_assign(console, start[j]) < 0)
continue;
cons_set[cs_idx++] = dev;
}
free(console_args);
free(start);
/* failed to set any console */
if (cs_idx == 0) {
free(cons_set);
return 1;
}
old_set = console_devices[console];
repeat = cd_count[console];
console_devices[console] = cons_set;
cd_count[console] = cs_idx;
/* Stop dropped consoles */
for (i = 0; i < repeat; i++) {
j = iomux_match_device(cons_set, cs_idx, old_set[i]);
if (j == cs_idx)
console_stop(console, old_set[i]);
}
free(old_set);
return 0;
}
#endif /* CONSOLE_MUX */
|
