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