53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
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#ifndef __PPBUS_VAR_H
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#define __PPBUS_VAR_H
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/* PPBUS mode masks. */
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#define PPBUS_COMPATIBLE 0x01 /* Centronics compatible mode */
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#define PPBUS_NIBBLE 0x02 /* reverse 4 bit mode */
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#define PPBUS_PS2 0x04 /* PS/2 byte mode */
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#define PPBUS_EPP 0x08 /* EPP mode, 32 bit */
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#define PPBUS_ECP 0x10 /* ECP mode */
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#define PPBUS_FAST 0x20 /* Fast Centronics mode */
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/* mode aliases */
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#define PPBUS_SPP PPBUS_NIBBLE | PPBUS_PS2 /* Won't work! */
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#define PPBUS_BYTE PPBUS_PS2
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#define PPBUS_MASK 0x3f
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#define PPBUS_OPTIONS_MASK 0xc0
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/* Useful macros for this field */
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#define PPBUS_IS_EPP(mode) ((mode) & PPBUS_EPP)
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#define PPBUS_IN_EPP_MODE(bus) (PPBUS_IS_EPP(ppbus_get_mode(bus)))
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#define PPBUS_IN_NIBBLE_MODE(bus) (ppbus_get_mode(bus) & PPBUS_NIBBLE)
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#define PPBUS_IN_PS2_MODE(bus) (ppbus_get_mode(bus) & PPBUS_PS2)
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/* PPBUS capabilities */
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#define PPBUS_HAS_INTR 0x01 /* Interrupt available */
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#define PPBUS_HAS_DMA 0x02 /* DMA available */
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#define PPBUS_HAS_FIFO 0x04 /* FIFO available */
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#define PPBUS_HAS_PS2 0x08 /* PS2 mode capable */
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#define PPBUS_HAS_ECP 0x10 /* ECP mode available */
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#define PPBUS_HAS_EPP 0x20 /* EPP mode available */
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/* IEEE flag in soft config */
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#define PPBUS_DISABLE_IEEE 0x00
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#define PPBUS_ENABLE_IEEE 0x01
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/* List of IVARS available to ppbus device drivers */
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/* #define PPBUS_IVAR_MODE 0 */
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#define PPBUS_IVAR_DMA 1
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#define PPBUS_IVAR_INTR 2
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#define PPBUS_IVAR_EPP_PROTO 3
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#define PPBUS_IVAR_IEEE 4
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/* Needed by callback's implemented using callout */
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#define PPBUS_IVAR_IRQSTAT 5
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#define PPBUS_IVAR_DMASTAT 6
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/* other fields are reserved to the ppbus internals */
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/* EPP protocol versions */
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#define PPBUS_EPP_1_9 0x0 /* default */
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#define PPBUS_EPP_1_7 0x1
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/* Parallel Port Bus sleep/wakeup queue. */
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#define PPBUSPRI (PZERO+8)
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#endif
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