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 | |