File: /usr/src/linux/include/linux/adb.h

1     /*
2      * Definitions for ADB (Apple Desktop Bus) support.
3      */
4     #ifndef __ADB_H
5     #define __ADB_H
6     
7     /* ADB commands */
8     #define ADB_BUSRESET		0
9     #define ADB_FLUSH(id)		(0x01 | ((id) << 4))
10     #define ADB_WRITEREG(id, reg)	(0x08 | (reg) | ((id) << 4))
11     #define ADB_READREG(id, reg)	(0x0C | (reg) | ((id) << 4))
12     
13     /* ADB default device IDs (upper 4 bits of ADB command byte) */
14     #define ADB_DONGLE	1	/* "software execution control" devices */
15     #define ADB_KEYBOARD	2
16     #define ADB_MOUSE	3
17     #define ADB_TABLET	4
18     #define ADB_MODEM	5
19     #define ADB_MISC	7	/* maybe a monitor */
20     
21     #define ADB_RET_OK	0
22     #define ADB_RET_TIMEOUT	3
23     
24     /* The kind of ADB request. The controller may emulate some
25        or all of those CUDA/PMU packet kinds */
26     #define ADB_PACKET	0
27     #define CUDA_PACKET	1
28     #define ERROR_PACKET	2
29     #define TIMER_PACKET	3
30     #define POWER_PACKET	4
31     #define MACIIC_PACKET	5
32     #define PMU_PACKET	6
33     
34     #ifdef __KERNEL__
35     
36     struct adb_request {
37     	unsigned char data[32];
38     	int nbytes;
39     	unsigned char reply[32];
40     	int reply_len;
41     	unsigned char reply_expected;
42     	unsigned char sent;
43     	unsigned char complete;
44     	void (*done)(struct adb_request *);
45     	void *arg;
46     	struct adb_request *next;
47     };
48     
49     struct adb_ids {
50     	int nids;
51     	unsigned char id[16];
52     };
53     
54     /* Structure which encapsulates a low-level ADB driver */
55     
56     struct adb_driver {
57     	char name[16];
58     	int (*probe)(void);
59     	int (*init)(void);
60     	int (*send_request)(struct adb_request *req, int sync);
61     	int (*autopoll)(int devs);
62     	void (*poll)(void);
63     	int (*reset_bus)(void);
64     };
65     
66     /* Values for adb_request flags */
67     #define ADBREQ_REPLY	1	/* expect reply */
68     #define ADBREQ_SYNC	2	/* poll until done */
69     #define ADBREQ_NOSEND	4	/* build the request, but don't send it */
70     
71     /* Messages sent thru the client_list notifier. You should NOT stop
72        the operation, at least not with this version */
73     enum adb_message {
74         ADB_MSG_POWERDOWN,	/* Currently called before sleep only */
75         ADB_MSG_PRE_RESET,	/* Called before resetting the bus */
76         ADB_MSG_POST_RESET	/* Called after resetting the bus (re-do init & register) */
77     };
78     extern struct adb_driver *adb_controller;
79     extern struct notifier_block *adb_client_list;
80     
81     int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
82     		int flags, int nbytes, ...);
83     int adb_register(int default_id,int handler_id,struct adb_ids *ids,
84     		 void (*handler)(unsigned char *, int, struct pt_regs *, int));
85     int adb_unregister(int index);
86     void adb_poll(void);
87     void adb_input(unsigned char *, int, struct pt_regs *, int);
88     int adb_reset_bus(void);
89     
90     int adb_try_handler_change(int address, int new_id);
91     int adb_get_infos(int address, int *original_address, int *handler_id);
92     
93     #endif /* __KERNEL__ */
94     
95     #endif /* __ADB_H */
96