include/linux/via.h

   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