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
36struct 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
49struct adb_ids {
50	int nids;
51	unsigned char id[16];
52};
53
54/* Structure which encapsulates a low-level ADB driver */
55
56struct 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 */
73enum 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};
78extern struct adb_driver *adb_controller;
79extern struct notifier_block *adb_client_list;
80
81int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
82		int flags, int nbytes, ...);
83int adb_register(int default_id,int handler_id,struct adb_ids *ids,
84		 void (*handler)(unsigned char *, int, struct pt_regs *, int));
85int adb_unregister(int index);
86void adb_poll(void);
87void adb_input(unsigned char *, int, struct pt_regs *, int);
88int adb_reset_bus(void);
89
90int adb_try_handler_change(int address, int new_id);
91int adb_get_infos(int address, int *original_address, int *handler_id);
92
93#endif /* __KERNEL__ */
94
95#endif /* __ADB_H */
96