/* $NetBSD: ppbus_var.h,v 1.5 2005/12/11 12:23:28 christos Exp $ */

#ifndef __PPBUS_VAR_H
#define __PPBUS_VAR_H

/* PPBUS mode masks. */
#define PPBUS_COMPATIBLE        0x01    /* Centronics compatible mode */
#define PPBUS_NIBBLE            0x02    /* reverse 4 bit mode */
#define PPBUS_PS2               0x04    /* PS/2 byte mode */
#define PPBUS_EPP               0x08    /* EPP mode, 32 bit */
#define PPBUS_ECP               0x10    /* ECP mode */
#define PPBUS_FAST              0x20    /* Fast Centronics mode */
/* mode aliases */
#define PPBUS_SPP               PPBUS_NIBBLE | PPBUS_PS2 /* Won't work! */
#define PPBUS_BYTE              PPBUS_PS2
#define PPBUS_MASK              0x3f
#define PPBUS_OPTIONS_MASK      0xc0
/* Useful macros for this field */
#define PPBUS_IS_EPP(mode) ((mode) & PPBUS_EPP)
#define PPBUS_IN_EPP_MODE(bus) (PPBUS_IS_EPP(ppbus_get_mode(bus)))
#define PPBUS_IN_NIBBLE_MODE(bus) (ppbus_get_mode(bus) & PPBUS_NIBBLE)
#define PPBUS_IN_PS2_MODE(bus) (ppbus_get_mode(bus) & PPBUS_PS2)

/* PPBUS capabilities */
#define PPBUS_HAS_INTR          0x01    /* Interrupt available */
#define PPBUS_HAS_DMA           0x02    /* DMA available */
#define PPBUS_HAS_FIFO          0x04    /* FIFO available */
#define PPBUS_HAS_PS2           0x08    /* PS2 mode capable */
#define PPBUS_HAS_ECP           0x10    /* ECP mode available */
#define PPBUS_HAS_EPP           0x20    /* EPP mode available */

/* IEEE flag in soft config */
#define PPBUS_DISABLE_IEEE      0x00
#define PPBUS_ENABLE_IEEE       0x01

/* List of IVARS available to ppbus device drivers */
/* #define PPBUS_IVAR_MODE 0 */
#define PPBUS_IVAR_DMA          1
#define PPBUS_IVAR_INTR         2
#define PPBUS_IVAR_EPP_PROTO    3
#define PPBUS_IVAR_IEEE         4
/* Needed by callback's implemented using callout */
#define PPBUS_IVAR_IRQSTAT      5
#define PPBUS_IVAR_DMASTAT      6
/* other fields are reserved to the ppbus internals */

/* EPP protocol versions */
#define PPBUS_EPP_1_9           0x0                     /* default */
#define PPBUS_EPP_1_7           0x1

/* Parallel Port Bus sleep/wakeup queue. */
#define PPBUSPRI                (PZERO+8)

#endif /* __PPBUS_VAR_H */