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/*
 * Definitions for ADB (Apple Desktop Bus) support.
 */
#ifndef __ADB_H
#define __ADB_H

/* ADB commands */
#define ADB_BUSRESET            0
#define ADB_FLUSH(id)           (0x01 | ((id) << 4))
#define ADB_WRITEREG(id, reg)   (0x08 | (reg) | ((id) << 4))
#define ADB_READREG(id, reg)    (0x0C | (reg) | ((id) << 4))

/* ADB default device IDs (upper 4 bits of ADB command byte) */
#define ADB_DONGLE      1       /* "software execution control" devices */
#define ADB_KEYBOARD    2
#define ADB_MOUSE       3
#define ADB_TABLET      4
#define ADB_MODEM       5
#define ADB_MISC        7       /* maybe a monitor */

#define ADB_RET_OK      0
#define ADB_RET_TIMEOUT 3

/* The kind of ADB request. The controller may emulate some
   or all of those CUDA/PMU packet kinds */
#define ADB_PACKET      0
#define CUDA_PACKET     1
#define ERROR_PACKET    2
#define TIMER_PACKET    3
#define POWER_PACKET    4
#define MACIIC_PACKET   5
#define PMU_PACKET      6
#define ADB_QUERY       7

/* ADB queries */

/* ADB_QUERY_GETDEVINFO
 * Query ADB slot for device presence
 * data[2] = id, rep[0] = orig addr, rep[1] = handler_id
 */
#define ADB_QUERY_GETDEVINFO    1

#ifdef __KERNEL__

struct adb_request {
        unsigned char data[32];
        int nbytes;
        unsigned char reply[32];
        int reply_len;
        unsigned char reply_expected;
        unsigned char sent;
        unsigned char complete;
        void (*done)(struct adb_request *);
        void *arg;
        struct adb_request *next;
};

struct adb_ids {
        int nids;
        unsigned char id[16];
};

/* Structure which encapsulates a low-level ADB driver */

struct adb_driver {
        char name[16];
        int (*probe)(void);
        int (*init)(void);
        int (*send_request)(struct adb_request *req, int sync);
        int (*autopoll)(int devs);
        void (*poll)(void);
        int (*reset_bus)(void);
};

/* Values for adb_request flags */
#define ADBREQ_REPLY    1       /* expect reply */
#define ADBREQ_SYNC     2       /* poll until done */
#define ADBREQ_NOSEND   4       /* build the request, but don't send it */

/* Messages sent thru the client_list notifier. You should NOT stop
   the operation, at least not with this version */
enum adb_message {
    ADB_MSG_POWERDOWN,  /* Currently called before sleep only */
    ADB_MSG_PRE_RESET,  /* Called before resetting the bus */
    ADB_MSG_POST_RESET  /* Called after resetting the bus (re-do init & register) */
};
extern struct adb_driver *adb_controller;
extern struct notifier_block *adb_client_list;

int adb_request(struct adb_request *req, void (*done)(struct adb_request *),
                int flags, int nbytes, ...);
int adb_register(int default_id,int handler_id,struct adb_ids *ids,
                 void (*handler)(unsigned char *, int, struct pt_regs *, int));
int adb_unregister(int index);
void adb_poll(void);
void adb_input(unsigned char *, int, struct pt_regs *, int);
int adb_reset_bus(void);

int adb_try_handler_change(int address, int new_id);
int adb_get_infos(int address, int *original_address, int *handler_id);

#endif /* __KERNEL__ */

#endif /* __ADB_H */