xref: /openbmc/linux/include/linux/adb.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Definitions for ADB (Apple Desktop Bus) support.
4  */
5 #ifndef __ADB_H
6 #define __ADB_H
7 
8 #include <uapi/linux/adb.h>
9 
10 
11 struct adb_request {
12 	unsigned char data[32];
13 	int nbytes;
14 	unsigned char reply[32];
15 	int reply_len;
16 	unsigned char reply_expected;
17 	unsigned char sent;
18 	unsigned char complete;
19 	void (*done)(struct adb_request *);
20 	void *arg;
21 	struct adb_request *next;
22 };
23 
24 struct adb_ids {
25 	int nids;
26 	unsigned char id[16];
27 };
28 
29 /* Structure which encapsulates a low-level ADB driver */
30 
31 struct adb_driver {
32 	char name[16];
33 	int (*probe)(void);
34 	int (*init)(void);
35 	int (*send_request)(struct adb_request *req, int sync);
36 	int (*autopoll)(int devs);
37 	void (*poll)(void);
38 	int (*reset_bus)(void);
39 };
40 
41 /* Values for adb_request flags */
42 #define ADBREQ_REPLY	1	/* expect reply */
43 #define ADBREQ_SYNC	2	/* poll until done */
44 #define ADBREQ_NOSEND	4	/* build the request, but don't send it */
45 
46 /* Messages sent thru the client_list notifier. You should NOT stop
47    the operation, at least not with this version */
48 enum adb_message {
49     ADB_MSG_POWERDOWN,	/* Currently called before sleep only */
50     ADB_MSG_PRE_RESET,	/* Called before resetting the bus */
51     ADB_MSG_POST_RESET	/* Called after resetting the bus (re-do init & register) */
52 };
53 extern struct blocking_notifier_head adb_client_list;
54 
55 int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
56 		int flags, int nbytes, ...);
57 int adb_register(int default_id,int handler_id,struct adb_ids *ids,
58 		 void (*handler)(unsigned char *, int, int));
59 int adb_unregister(int index);
60 void adb_poll(void);
61 void adb_input(unsigned char *, int, int);
62 int adb_reset_bus(void);
63 
64 int adb_try_handler_change(int address, int new_id);
65 int adb_get_infos(int address, int *original_address, int *handler_id);
66 
67 #endif /* __ADB_H */
68