paride.h
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上传日期:2013-04-10
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- #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
- 1.01ac AGC 2002.04.03 added privptr
- */
- #define PARIDE_H_VERSION "1.01ac"
- /* 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 */
- int private; /* for protocol module */
- void *privptr; /* private pointer for protocol module */
- /* For 2.5 just make private a ulong but
- for 2.4 fixups thats a bit risky.. */
- 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));
- /* macros and functions exported to the protocol modules */
- #define delay_p (pi->delay?udelay(pi->delay):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);
-
- void (*init_proto)(PIA *);
- void (*release_proto)(PIA *);
- };
- typedef struct pi_protocol PIP;
- extern int pi_register( PIP * );
- extern void pi_unregister ( PIP * );
- #endif /* __DRIVERS_PARIDE_H__ */
- /* end of paride.h */