include/linux/adb.h

   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 */