24 lines
932 B
C
24 lines
932 B
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Miscellaneous definitions for VIA chipsets
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Currently used only by drivers/parport/parport_pc.c */
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/* Values for SuperIO function select configuration register */
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#define VIA_FUNCTION_PARPORT_SPP 0x00
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#define VIA_FUNCTION_PARPORT_ECP 0x01
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#define VIA_FUNCTION_PARPORT_EPP 0x02
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#define VIA_FUNCTION_PARPORT_DISABLE 0x03
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#define VIA_FUNCTION_PROBE 0xFF /* Special magic value to be used in code, not to be written into chip */
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/* Bits for parallel port mode configuration register */
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#define VIA_PARPORT_ECPEPP 0X20
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#define VIA_PARPORT_BIDIR 0x80
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/* VIA configuration registers */
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#define VIA_CONFIG_INDEX 0x3F0
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#define VIA_CONFIG_DATA 0x3F1
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/* Mask for parallel port IRQ bits (in ISA PnP IRQ routing register 1) */
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#define VIA_IRQCONTROL_PARALLEL 0xF0
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/* Mask for parallel port DMA bits (in ISA PnP DMA routing register) */
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#define VIA_DMACONTROL_PARALLEL 0x0C
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