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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
2 | * Copyright (C) 2005 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genericconsole Console |
29 | /** @addtogroup genericconsole |
30 | * @ingroup kernel |
- | |
31 | * @{ |
30 | * @{ |
32 | */ |
31 | */ |
33 | /** @file |
32 | /** @file |
34 | */ |
33 | */ |
35 | 34 | ||
36 | #include <console/chardev.h> |
35 | #include <console/chardev.h> |
37 | #include <putchar.h> |
36 | #include <putchar.h> |
38 | #include <synch/waitq.h> |
37 | #include <synch/waitq.h> |
39 | #include <synch/spinlock.h> |
38 | #include <synch/spinlock.h> |
40 | 39 | ||
41 | /** Initialize character device. |
40 | /** Initialize character device. |
42 | * |
41 | * |
43 | * @param chardev Character device. |
42 | * @param chardev Character device. |
44 | * @param op Implementation of character device operations. |
43 | * @param op Implementation of character device operations. |
45 | */ |
44 | */ |
46 | void chardev_initialize(char *name,chardev_t *chardev, |
45 | void chardev_initialize(char *name,chardev_t *chardev, |
47 | chardev_operations_t *op) |
46 | chardev_operations_t *op) |
48 | { |
47 | { |
49 | chardev->name = name; |
48 | chardev->name = name; |
50 | 49 | ||
51 | waitq_initialize(&chardev->wq); |
50 | waitq_initialize(&chardev->wq); |
52 | spinlock_initialize(&chardev->lock, "chardev"); |
51 | spinlock_initialize(&chardev->lock, "chardev"); |
53 | chardev->counter = 0; |
52 | chardev->counter = 0; |
54 | chardev->index = 0; |
53 | chardev->index = 0; |
55 | chardev->op = op; |
54 | chardev->op = op; |
56 | } |
55 | } |
57 | 56 | ||
58 | /** Push character read from input character device. |
57 | /** Push character read from input character device. |
59 | * |
58 | * |
60 | * @param chardev Character device. |
59 | * @param chardev Character device. |
61 | * @param ch Character being pushed. |
60 | * @param ch Character being pushed. |
62 | */ |
61 | */ |
63 | void chardev_push_character(chardev_t *chardev, __u8 ch) |
62 | void chardev_push_character(chardev_t *chardev, __u8 ch) |
64 | { |
63 | { |
65 | spinlock_lock(&chardev->lock); |
64 | spinlock_lock(&chardev->lock); |
66 | chardev->counter++; |
65 | chardev->counter++; |
67 | if (chardev->counter == CHARDEV_BUFLEN - 1) { |
66 | if (chardev->counter == CHARDEV_BUFLEN - 1) { |
68 | /* buffer full => disable device interrupt */ |
67 | /* buffer full => disable device interrupt */ |
69 | chardev->op->suspend(chardev); |
68 | chardev->op->suspend(chardev); |
70 | } |
69 | } |
71 | 70 | ||
72 | chardev->buffer[chardev->index++] = ch; |
71 | chardev->buffer[chardev->index++] = ch; |
73 | chardev->index = chardev->index % CHARDEV_BUFLEN; /* index modulo size of buffer */ |
72 | chardev->index = chardev->index % CHARDEV_BUFLEN; /* index modulo size of buffer */ |
74 | waitq_wakeup(&chardev->wq, WAKEUP_FIRST); |
73 | waitq_wakeup(&chardev->wq, WAKEUP_FIRST); |
75 | spinlock_unlock(&chardev->lock); |
74 | spinlock_unlock(&chardev->lock); |
76 | } |
75 | } |
77 | 76 | ||
78 | /** @} |
77 | /** @} |
79 | */ |
78 | */ |
80 | 79 | ||
81 | 80 |