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
45 struct 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
58 struct adb_ids {
59 int nids;
60 unsigned char id[16];
61 };
62
63 /* Structure which encapsulates a low-level ADB driver */
64
65 struct 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 */
82 enum 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 };
87 extern struct adb_driver *adb_controller;
88 extern struct blocking_notifier_head adb_client_list;
89
90 int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
91 int flags, int nbytes, ...);
92 int adb_register(int default_id,int handler_id,struct adb_ids *ids,
93 void (*handler)(unsigned char *, int, int));
94 int adb_unregister(int index);
95 void adb_poll(void);
96 void adb_input(unsigned char *, int, int);
97 int adb_reset_bus(void);
98
99 int adb_try_handler_change(int address, int new_id);
100 int adb_get_infos(int address, int *original_address, int *handler_id);
101
102 #endif /* __KERNEL__ */
103
104 #endif /* __ADB_H */
105
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