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33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef KERN_CHARDEV_H_ |
35 | #ifndef KERN_CHARDEV_H_ |
36 | #define KERN_CHARDEV_H_ |
36 | #define KERN_CHARDEV_H_ |
37 | 37 | ||
38 | #include <typedefs.h> |
- | |
39 | #include <arch/types.h> |
38 | #include <arch/types.h> |
40 | #include <synch/waitq.h> |
39 | #include <synch/waitq.h> |
41 | #include <synch/spinlock.h> |
40 | #include <synch/spinlock.h> |
42 | 41 | ||
43 | #define CHARDEV_BUFLEN 512 |
42 | #define CHARDEV_BUFLEN 512 |
44 | 43 | ||
- | 44 | struct chardev; |
|
- | 45 | ||
45 | /* Character device operations interface. */ |
46 | /* Character device operations interface. */ |
46 | struct chardev_operations { |
47 | typedef struct { |
47 | void (* suspend)(chardev_t *); /**< Suspend pushing characters. */ |
48 | void (* suspend)(struct chardev *); /**< Suspend pushing characters. */ |
48 | void (* resume)(chardev_t *); /**< Resume pushing characters. */ |
49 | void (* resume)(struct chardev *); /**< Resume pushing characters. */ |
49 | void (* write)(chardev_t *, char c); /**< Write character to stream. */ |
50 | void (* write)(struct chardev *, char c); /**< Write character to stream. */ |
50 | /** Read character directly from device, assume interrupts disabled */ |
51 | /** Read character directly from device, assume interrupts disabled */ |
51 | char (* read)(chardev_t *); |
52 | char (* read)(struct chardev *); |
52 | }; |
- | |
53 | - | ||
54 | typedef struct chardev_operations chardev_operations_t; |
53 | } chardev_operations_t; |
55 | 54 | ||
56 | /** Character input device. */ |
55 | /** Character input device. */ |
57 | struct chardev { |
56 | typedef struct chardev { |
58 | char *name; |
57 | char *name; |
59 | 58 | ||
60 | waitq_t wq; |
59 | waitq_t wq; |
61 | SPINLOCK_DECLARE(lock); /**< Protects everything below. */ |
60 | SPINLOCK_DECLARE(lock); /**< Protects everything below. */ |
62 | uint8_t buffer[CHARDEV_BUFLEN]; |
61 | uint8_t buffer[CHARDEV_BUFLEN]; |
63 | count_t counter; |
62 | count_t counter; |
64 | chardev_operations_t *op; /**< Implementation of chardev operations. */ |
63 | chardev_operations_t *op; /**< Implementation of chardev operations. */ |
65 | index_t index; |
64 | index_t index; |
66 | void *data; |
65 | void *data; |
67 | }; |
66 | } chardev_t; |
68 | 67 | ||
69 | extern void chardev_initialize(char *name, |
68 | extern void chardev_initialize(char *name, |
70 | chardev_t *chardev, |
69 | chardev_t *chardev, |
71 | chardev_operations_t *op); |
70 | chardev_operations_t *op); |
72 | extern void chardev_push_character(chardev_t *chardev, uint8_t ch); |
71 | extern void chardev_push_character(chardev_t *chardev, uint8_t ch); |