Current File : //usr/src/linux-headers-5.15.0-125-generic/include/linux/via.h
/* SPDX-License-Identifier: GPL-2.0 */
/* Miscellaneous definitions for VIA chipsets
Currently used only by drivers/parport/parport_pc.c */
/* Values for SuperIO function select configuration register */
#define VIA_FUNCTION_PARPORT_SPP 0x00
#define VIA_FUNCTION_PARPORT_ECP 0x01
#define VIA_FUNCTION_PARPORT_EPP 0x02
#define VIA_FUNCTION_PARPORT_DISABLE 0x03
#define VIA_FUNCTION_PROBE 0xFF /* Special magic value to be used in code, not to be written into chip */
/* Bits for parallel port mode configuration register */
#define VIA_PARPORT_ECPEPP 0X20
#define VIA_PARPORT_BIDIR 0x80
/* VIA configuration registers */
#define VIA_CONFIG_INDEX 0x3F0
#define VIA_CONFIG_DATA 0x3F1
/* Mask for parallel port IRQ bits (in ISA PnP IRQ routing register 1) */
#define VIA_IRQCONTROL_PARALLEL 0xF0
/* Mask for parallel port DMA bits (in ISA PnP DMA routing register) */
#define VIA_DMACONTROL_PARALLEL 0x0C
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