include/linux/adb.h

   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, struct pt_regs *, int));
  94 int adb_unregister(int index);
  95 void adb_poll(void);
  96 void adb_input(unsigned char *, int, struct pt_regs *, 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 */