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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 | #ifndef __CHARDEV_H__ |
29 | #ifndef __CHARDEV_H__ |
| 30 | #define __CHARDEV_H__ |
30 | #define __CHARDEV_H__ |
| 31 | 31 | ||
| 32 | #include <typedefs.h> |
32 | #include <typedefs.h> |
| 33 | #include <arch/types.h> |
33 | #include <arch/types.h> |
| 34 | #include <synch/waitq.h> |
34 | #include <synch/waitq.h> |
| 35 | #include <synch/spinlock.h> |
35 | #include <synch/spinlock.h> |
| 36 | 36 | ||
| 37 | #define CHARDEV_BUFLEN 512 |
37 | #define CHARDEV_BUFLEN 512 |
| 38 | 38 | ||
| 39 | struct chardev; |
- | |
| 40 | - | ||
| 41 | /* Character device operations interface. */ |
39 | /* Character device operations interface. */ |
| 42 | struct chardev_operations { |
40 | struct chardev_operations { |
| 43 | void (* suspend)(struct chardev *);/**< Suspend pushing characters. */ |
41 | void (* suspend)(chardev_t *); /**< Suspend pushing characters. */ |
| 44 | void (* resume)(struct chardev *); /**< Resume pushing characters. */ |
42 | void (* resume)(chardev_t *); /**< Resume pushing characters. */ |
| 45 | /** Write character to stream */ |
- | |
| 46 | void (* write)(struct chardev *, char c); |
43 | void (* write)(chardev_t *, char c); /**< Write character to stream. */ |
| 47 | }; |
44 | }; |
| 48 | 45 | ||
| 49 | typedef struct chardev_operations chardev_operations_t; |
46 | typedef struct chardev_operations chardev_operations_t; |
| 50 | 47 | ||
| 51 | /** Character input device. */ |
48 | /** Character input device. */ |
| 52 | struct chardev { |
49 | struct chardev { |
| 53 | char *name; |
50 | char *name; |
| 54 | 51 | ||
| 55 | waitq_t wq; |
52 | waitq_t wq; |
| 56 | spinlock_t lock; /**< Protects everything below. */ |
53 | spinlock_t lock; /**< Protects everything below. */ |
| 57 | __u8 buffer[CHARDEV_BUFLEN]; |
54 | __u8 buffer[CHARDEV_BUFLEN]; |
| 58 | count_t counter; |
55 | count_t counter; |
| 59 | chardev_operations_t *op; /**< Implementation of chardev operations. */ |
56 | chardev_operations_t *op; /**< Implementation of chardev operations. */ |
| 60 | index_t index; |
57 | index_t index; |
| 61 | void *data; |
58 | void *data; |
| 62 | }; |
59 | }; |
| 63 | 60 | ||
| 64 | extern void chardev_initialize(char *name, |
61 | extern void chardev_initialize(char *name, |
| 65 | chardev_t *chardev, |
62 | chardev_t *chardev, |
| 66 | chardev_operations_t *op); |
63 | chardev_operations_t *op); |
| 67 | void chardev_push_character(chardev_t *chardev, __u8 ch); |
64 | void chardev_push_character(chardev_t *chardev, __u8 ch); |
| 68 | 65 | ||
| 69 | #endif /* __CHARDEV_H__ */ |
66 | #endif /* __CHARDEV_H__ */ |
| 70 | 67 | ||