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1 | /* |
1 | /* |
2 | * Copyright (C) 2003 Josef Cejka |
2 | * Copyright (C) 2003 Josef Cejka |
3 | * Copyright (C) 2005 Jakub Jermar |
3 | * Copyright (C) 2005 Jakub Jermar |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | #include <arch/drivers/keyboard.h> |
30 | #include <arch/drivers/keyboard.h> |
31 | #include <console/chardev.h> |
31 | #include <console/chardev.h> |
32 | #include <console/console.h> |
32 | #include <console/console.h> |
33 | #include <arch/cp0.h> |
33 | #include <arch/cp0.h> |
34 | #include <putchar.h> |
34 | #include <putchar.h> |
35 | #include <synch/spinlock.h> |
35 | #include <synch/spinlock.h> |
36 | #include <synch/waitq.h> |
36 | #include <synch/waitq.h> |
37 | #include <typedefs.h> |
37 | #include <typedefs.h> |
38 | 38 | ||
39 | static chardev_t kbrd; |
- | |
40 | - | ||
41 | static void keyboard_enable(void); |
39 | static void keyboard_enable(void); |
- | 40 | static void keyboard_disable(void); |
|
- | 41 | ||
- | 42 | static chardev_t kbrd; |
|
- | 43 | static chardev_operations_t ops = { |
|
- | 44 | .resume = keyboard_enable, |
|
- | 45 | .suspend = keyboard_disable |
|
- | 46 | }; |
|
42 | 47 | ||
43 | /** Initialize keyboard subsystem. */ |
48 | /** Initialize keyboard subsystem. */ |
44 | void keyboard_init(void) |
49 | void keyboard_init(void) |
45 | { |
50 | { |
46 | cp0_unmask_int(KEYBOARD_IRQ); |
51 | cp0_unmask_int(KEYBOARD_IRQ); |
47 | chardev_initialize(&kbrd, keyboard_enable); |
52 | chardev_initialize(&kbrd, &ops); |
48 | stdin = &kbrd; |
53 | stdin = &kbrd; |
49 | } |
54 | } |
50 | 55 | ||
51 | /** Process keyboard interrupt. |
56 | /** Process keyboard interrupt. */ |
52 | * |
- | |
53 | * This function is called directly from the interrupt handler. |
- | |
54 | * It feeds the keyboard buffer with characters read. When the buffer |
- | |
55 | * is full, it simply masks the keyboard interrupt signal. |
- | |
56 | */ |
- | |
57 | void keyboard(void) |
57 | void keyboard(void) |
58 | { |
58 | { |
59 | char ch; |
59 | char ch; |
60 | 60 | ||
61 | spinlock_lock(&kbrd.lock); |
- | |
62 | kbrd.counter++; |
- | |
63 | if (kbrd.counter == CHARDEV_BUFLEN - 1) { |
- | |
64 | /* buffer full => disable keyboard interrupt */ |
- | |
65 | cp0_mask_int(KEYBOARD_IRQ); |
- | |
66 | } |
- | |
67 | - | ||
68 | ch = *((char *) KEYBOARD_ADDRESS); |
61 | ch = *((char *) KEYBOARD_ADDRESS); |
69 | putchar(ch); |
- | |
70 | kbrd.buffer[kbrd.index++] = ch; |
- | |
71 | kbrd.index = kbrd.index % CHARDEV_BUFLEN; /* index modulo size of buffer */ |
- | |
72 | waitq_wakeup(&kbrd.wq, WAKEUP_FIRST); |
- | |
73 | spinlock_unlock(&kbrd.lock); |
62 | chardev_push_character(&kbrd, ch); |
74 | } |
63 | } |
75 | 64 | ||
76 | /* Called from getc(). */ |
65 | /* Called from getc(). */ |
77 | void keyboard_enable(void) |
66 | void keyboard_enable(void) |
78 | { |
67 | { |
79 | cp0_unmask_int(KEYBOARD_IRQ); |
68 | cp0_unmask_int(KEYBOARD_IRQ); |
80 | } |
69 | } |
- | 70 | ||
- | 71 | /* Called from getc(). */ |
|
- | 72 | void keyboard_disable(void) |
|
- | 73 | { |
|
- | 74 | cp0_mask_int(KEYBOARD_IRQ); |
|
- | 75 | } |
|
81 | 76 |