--- /dev/null
+#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 * );
+
+#endif /* __DRIVERS_PARIDE_H__ */
+/* end of paride.h */
Code Review / kvmfornfv.git / blobdiff