xref: /openbmc/linux/include/linux/via.h (revision b2441318)
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