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Diffstat (limited to 'drivers/block/paride/paride.h')
| -rw-r--r-- | drivers/block/paride/paride.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/drivers/block/paride/paride.h b/drivers/block/paride/paride.h new file mode 100644 index 000000000..ddb9e589d --- /dev/null +++ b/drivers/block/paride/paride.h @@ -0,0 +1,172 @@ +#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 */ |