1  /* SPDX-License-Identifier: GPL-2.0 */
2  /* Miscellaneous definitions for VIA chipsets
3     Currently used only by drivers/parport/parport_pc.c */
4  
5  /* Values for SuperIO function select configuration register */
6  #define VIA_FUNCTION_PARPORT_SPP     0x00
7  #define VIA_FUNCTION_PARPORT_ECP     0x01
8  #define VIA_FUNCTION_PARPORT_EPP     0x02
9  #define VIA_FUNCTION_PARPORT_DISABLE 0x03
10  #define VIA_FUNCTION_PROBE           0xFF /* Special magic value to be used in code, not to be written into chip */
11  
12  /* Bits for parallel port mode configuration register */
13  #define VIA_PARPORT_ECPEPP 0X20
14  #define VIA_PARPORT_BIDIR  0x80
15  
16  /* VIA configuration registers */
17  #define VIA_CONFIG_INDEX 0x3F0
18  #define VIA_CONFIG_DATA  0x3F1
19  
20  /* Mask for parallel port IRQ bits (in ISA PnP IRQ routing register 1) */
21  #define VIA_IRQCONTROL_PARALLEL 0xF0
22  /* Mask for parallel port DMA bits (in ISA PnP DMA routing register) */
23  #define VIA_DMACONTROL_PARALLEL 0x0C
24