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