#ifndef __DRIVERS_PARIDE_H__#define __DRIVERS_PARIDE_H__ /* 	paride.h	(c) 1997-8  Grant R. Guenther <grant@torque.net>   		                    Under the terms of the GPL.    This file defines the interface between the high-level parallel   IDE device drivers (pd, pf, pcd, pt) and the adapter chips. */ /* Changes: 	1.01	GRG 1998.05.05	init_proto, release_proto*/ #define PARIDE_H_VERSION 	"1.01" /* Some adapters need to know what kind of device they are in    Values for devtype:*/ #define	PI_PD	0	/* IDE disk */#define PI_PCD	1	/* ATAPI CDrom */#define PI_PF   2	/* ATAPI disk */#define PI_PT	3	/* ATAPI tape */#define PI_PG   4       /* ATAPI generic */ /* The paride module contains no state, instead the drivers allocate   a pi_adapter data structure and pass it to paride in every operation. */ struct pi_adapter  { 	struct pi_protocol *proto;   /* adapter protocol */	int	port;		     /* base address of parallel port */	int	mode;		     /* transfer mode in use */	int     delay;		     /* adapter delay setting */	int	devtype;	     /* device type: PI_PD etc. */	char    *device;	     /* name of driver */	int     unit;		     /* unit number for chained adapters */	int	saved_r0;	     /* saved port state */	int	saved_r2;	     /* saved port state */	int	reserved;	     /* number of ports reserved */	unsigned long	private;     /* for protocol module */ 	wait_queue_head_t parq;     /* semaphore for parport sharing */	void	*pardev;	     /* pointer to pardevice */	char	*parname;	     /* parport name */	int	claimed;	     /* parport has already been claimed */	void (*claim_cont)(void);    /* continuation for parport wait */}; typedef struct pi_adapter PIA; /* functions exported by paride to the high level drivers */ extern int pi_init(PIA *pi, 	int autoprobe,		/* 1 to autoprobe */	int port, 		/* base port address */	int mode, 		/* -1 for autoprobe */	int unit,		/* unit number, if supported */	int protocol, 		/* protocol to use */	int delay, 		/* -1 to use adapter specific default */	char * scratch, 	/* address of 512 byte buffer */	int devtype,		/* device type: PI_PD, PI_PCD, etc ... */	int verbose,		/* log verbose data while probing */	char *device		/* name of the driver */	);			/* returns 0 on failure, 1 on success */ extern void pi_release(PIA *pi); /* registers are addressed as (cont,regr)        	cont: 0 for command register file, 1 for control register(s)	regr: 0-7 for register number. */ extern void pi_write_regr(PIA *pi, int cont, int regr, int val); extern int pi_read_regr(PIA *pi, int cont, int regr); extern void pi_write_block(PIA *pi, char * buf, int count); extern void pi_read_block(PIA *pi, char * buf, int count); extern void pi_connect(PIA *pi); extern void pi_disconnect(PIA *pi); extern void pi_do_claimed(PIA *pi, void (*cont)(void));extern int pi_schedule_claimed(PIA *pi, void (*cont)(void)); /* macros and functions exported to the protocol modules */ #define delay_p			(pi->delay?udelay(pi->delay):(void)0)#define out_p(offs,byte)	outb(byte,pi->port+offs); delay_p;#define in_p(offs)		(delay_p,inb(pi->port+offs)) #define w0(byte)                {out_p(0,byte);}#define r0()                    (in_p(0) & 0xff)#define w1(byte)                {out_p(1,byte);}#define r1()                    (in_p(1) & 0xff)#define w2(byte)                {out_p(2,byte);}#define r2()                    (in_p(2) & 0xff)#define w3(byte)                {out_p(3,byte);}#define w4(byte)                {out_p(4,byte);}#define r4()                    (in_p(4) & 0xff)#define w4w(data)     		{outw(data,pi->port+4); delay_p;}#define w4l(data)     		{outl(data,pi->port+4); delay_p;}#define r4w()         		(delay_p,inw(pi->port+4)&0xffff)#define r4l()         		(delay_p,inl(pi->port+4)&0xffffffff) static inline u16 pi_swab16( char *b, int k) { 	union { u16 u; char t[2]; } r; 	r.t[0]=b[2*k+1]; r.t[1]=b[2*k];        return r.u;} static inline u32 pi_swab32( char *b, int k) { 	union { u32 u; char f[4]; } r; 	r.f[0]=b[4*k+1]; r.f[1]=b[4*k];	r.f[2]=b[4*k+3]; r.f[3]=b[4*k+2];        return r.u;} struct pi_protocol { 	char	name[8];	/* name for this protocol */	int	index;		/* index into protocol table */ 	int	max_mode;	/* max mode number */	int	epp_first;	/* modes >= this use 8 ports */		int	default_delay;  /* delay parameter if not specified */	int	max_units;	/* max chained units probed for */ 	void (*write_regr)(PIA *,int,int,int);	int  (*read_regr)(PIA *,int,int);	void (*write_block)(PIA *,char *,int);	void (*read_block)(PIA *,char *,int); 	void (*connect)(PIA *);	void (*disconnect)(PIA *);		int  (*test_port)(PIA *);	int  (*probe_unit)(PIA *);	int  (*test_proto)(PIA *,char *,int);	void (*log_adapter)(PIA *,char *,int);		int (*init_proto)(PIA *);	void (*release_proto)(PIA *);	struct module *owner;}; typedef struct pi_protocol PIP; extern int paride_register( PIP * );extern void paride_unregister ( PIP * );void *pi_register_driver(char *);void pi_unregister_driver(void *); #endif /* __DRIVERS_PARIDE_H__ *//* end of paride.h */