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#define ADB_QUERY	7
34
35/* ADB queries */
36
37/* ADB_QUERY_GETDEVINFO
38 * Query ADB slot for device presence
39 * data[2] = id, rep[0] = orig addr, rep[1] = handler_id
40 */
41#define ADB_QUERY_GETDEVINFO	1
42
43#ifdef __KERNEL__
44
45struct adb_request {
46	unsigned char data[32];
47	int nbytes;
48	unsigned char reply[32];
49	int reply_len;
50	unsigned char reply_expected;
51	unsigned char sent;
52	unsigned char complete;
53	void (*done)(struct adb_request *);
54	void *arg;
55	struct adb_request *next;
56};
57
58struct adb_ids {
59	int nids;
60	unsigned char id[16];
61};
62
63/* Structure which encapsulates a low-level ADB driver */
64
65struct adb_driver {
66	char name[16];
67	int (*probe)(void);
68	int (*init)(void);
69	int (*send_request)(struct adb_request *req, int sync);
70	int (*autopoll)(int devs);
71	void (*poll)(void);
72	int (*reset_bus)(void);
73};
74
75/* Values for adb_request flags */
76#define ADBREQ_REPLY	1	/* expect reply */
77#define ADBREQ_SYNC	2	/* poll until done */
78#define ADBREQ_NOSEND	4	/* build the request, but don't send it */
79
80/* Messages sent thru the client_list notifier. You should NOT stop
81   the operation, at least not with this version */
82enum adb_message {
83    ADB_MSG_POWERDOWN,	/* Currently called before sleep only */
84    ADB_MSG_PRE_RESET,	/* Called before resetting the bus */
85    ADB_MSG_POST_RESET	/* Called after resetting the bus (re-do init & register) */
86};
87extern struct adb_driver *adb_controller;
88extern struct blocking_notifier_head adb_client_list;
89
90int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
91		int flags, int nbytes, ...);
92int adb_register(int default_id,int handler_id,struct adb_ids *ids,
93		 void (*handler)(unsigned char *, int, int));
94int adb_unregister(int index);
95void adb_poll(void);
96void adb_input(unsigned char *, int, int);
97int adb_reset_bus(void);
98
99int adb_try_handler_change(int address, int new_id);
100int adb_get_infos(int address, int *original_address, int *handler_id);
101
102#endif /* __KERNEL__ */
103
104#endif /* __ADB_H */
105