linux/include/linux/adb.h
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   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 blocking_notifier_head adb_client_list;
  88
  89int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
  90                int flags, int nbytes, ...);
  91int adb_register(int default_id,int handler_id,struct adb_ids *ids,
  92                 void (*handler)(unsigned char *, int, int));
  93int adb_unregister(int index);
  94void adb_poll(void);
  95void adb_input(unsigned char *, int, int);
  96int adb_reset_bus(void);
  97
  98int adb_try_handler_change(int address, int new_id);
  99int adb_get_infos(int address, int *original_address, int *handler_id);
 100
 101#endif /* __KERNEL__ */
 102
 103#endif /* __ADB_H */
 104
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