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
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <libpayload-config.h>
#include <libpayload.h>
#include <usb/usb.h>
struct console_output_driver *console_out;
struct console_input_driver *console_in;
static console_input_type last_getchar_input_type;
static int output_driver_exists(struct console_output_driver *out)
{
struct console_output_driver *head = console_out;
while (head) {
if (head == out)
return 1;
head = head->next;
}
return 0;
}
static int input_driver_exists(struct console_input_driver *in)
{
struct console_input_driver *head = console_in;
while (head) {
if (head == in)
return 1;
head = head->next;
}
return 0;
}
void console_add_output_driver(struct console_output_driver *out)
{
die_if(!out->putchar && !out->write, "Need at least one output func\n");
/* Check if this driver was already added to the console list */
if (output_driver_exists(out))
return;
out->next = console_out;
console_out = out;
}
void console_add_input_driver(struct console_input_driver *in)
{
/* Check if this driver was already added to the console list */
if (input_driver_exists(in))
return;
/* Flush out the driver input buffer. */
while (in->havekey())
in->getchar();
in->next = console_in;
console_in = in;
}
/*
* For when you really need to silence an output driver (e.g. to avoid ugly
* recursions). Takes the pointer of either of the two output functions, since
* the struct console_output_driver itself is often static and inaccessible.
*/
int console_remove_output_driver(void *function)
{
struct console_output_driver **out;
for (out = &console_out; *out; out = &(*out)->next)
if ((*out)->putchar == function || (*out)->write == function) {
*out = (*out)->next;
return 1;
}
return 0;
}
void console_init(void)
{
#if CONFIG(LP_VIDEO_CONSOLE)
video_console_init();
#endif
#if CONFIG(LP_SERIAL_CONSOLE)
serial_console_init();
#endif
#if CONFIG(LP_PC_KEYBOARD)
keyboard_init();
#endif
#if CONFIG(LP_CBMEM_CONSOLE)
cbmem_console_init();
#endif
}
void console_write(const void *buffer, size_t count)
{
const char *ptr;
struct console_output_driver *out;
for (out = console_out; out != 0; out = out->next)
if (out->write)
out->write(buffer, count);
else
for (ptr = buffer; (void *)ptr < buffer + count; ptr++)
out->putchar(*ptr);
}
int putchar(unsigned int i)
{
unsigned char c = (unsigned char)i;
console_write(&c, 1);
return (int)c;
}
int puts(const char *s)
{
size_t size = strlen(s);
console_write(s, size);
putchar('\n');
return size + 1;
}
int havekey(void)
{
#if CONFIG(LP_USB)
usb_poll();
#endif
struct console_input_driver *in;
for (in = console_in; in != 0; in = in->next)
if (in->havekey())
return 1;
return 0;
}
/**
* This returns an ASCII value - the two getchar functions
* cook the respective input from the device.
*/
int getchar(void)
{
while (1) {
#if CONFIG(LP_USB)
usb_poll();
#endif
struct console_input_driver *in;
for (in = console_in; in != 0; in = in->next)
if (in->havechar()) {
last_getchar_input_type = in->input_type;
return in->getchar();
}
}
}
int getchar_timeout(int *ms)
{
while (*ms > 0) {
if (havekey())
return getchar();
mdelay(100);
*ms -= 100;
}
if (*ms < 0)
*ms = 0;
return 0;
}
console_input_type last_key_input_type(void)
{
return last_getchar_input_type;
}
|
