/*
 * Definitions for talking to the CUDA.  The CUDA is a microcontroller
 * which controls the ADB, system power, RTC, and various other things.
 *
 * Copyright (C) 1996 Paul Mackerras.
 */

/* First byte sent to or received from CUDA */
#define ADB_PACKET	0
#define CUDA_PACKET	1
#define ERROR_PACKET	2
#define TIMER_PACKET	3
#define POWER_PACKET	4
#define MACIIC_PACKET	5

/* ADB commands (2nd byte) */
#define ADB_BUSRESET		0
#define ADB_FLUSH(id)		(1 + ((id) << 4))
#define ADB_WRITEREG(id, reg)	(8 + (reg) + ((id) << 4))
#define ADB_READREG(id, reg)	(0xc + (reg) + ((id) << 4))

/* ADB default device IDs (upper 4 bits of 2nd 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 */

/* CUDA commands (2nd byte) */
#define CUDA_WARM_START		0
#define CUDA_AUTOPOLL		1
#define CUDA_GET_6805_ADDR	2
#define CUDA_GET_TIME		3
#define CUDA_GET_PRAM		7
#define CUDA_SET_6805_ADDR	8
#define CUDA_SET_TIME		9
#define CUDA_POWERDOWN		0xa
#define CUDA_POWERUP_TIME	0xb
#define CUDA_SET_PRAM		0xc
#define CUDA_MS_RESET		0xd
#define CUDA_SEND_DFAC		0xe
#define CUDA_RESET_SYSTEM	0x11
#define CUDA_SET_IPL		0x12
#define CUDA_SET_AUTO_RATE	0x14
#define CUDA_GET_AUTO_RATE	0x16
#define CUDA_SET_DEVICE_LIST	0x19
#define CUDA_GET_DEVICE_LIST	0x1a
#define CUDA_GET_SET_IIC	0x22

#ifdef __KERNEL__

struct cuda_request {
    unsigned char data[16];
    int nbytes;
    unsigned char reply[16];
    int reply_len;
    unsigned char reply_expected;
    unsigned char sent;
    unsigned char got_reply;
    void (*done)(struct cuda_request *);
    void *arg;
    struct cuda_request *next;
};

void via_cuda_init(void);
int cuda_request(struct cuda_request *req,
		 void (*done)(struct cuda_request *), int nbytes, ...);
int cuda_send_request(struct cuda_request *req);
void cuda_poll(void);
int adb_register(int default_id,
		 void (*handler)(unsigned char *, int, struct pt_regs *));

#endif	/* __KERNEL */