drivers/staging/gpib/include/amcc5920.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 /***************************************************************************
   4  *  Header for amcc5920 pci chip
   5  *
   6  *   copyright            : (C) 2002 by Frank Mori Hess
   7  ***************************************************************************/
   8
   9 // plx pci chip registers and bits
  10 enum amcc_registers {
  11         AMCC_INTCS_REG = 0x38,
  12         AMCC_PASS_THRU_REG      = 0x60,
  13 };
  14
  15 enum amcc_incsr_bits {
  16         AMCC_ADDON_INTR_ENABLE_BIT = 0x2000,
  17         AMCC_ADDON_INTR_ACTIVE_BIT = 0x400000,
  18         AMCC_INTR_ACTIVE_BIT = 0x800000,
  19 };
  20
  21 static const int bits_per_region = 8;
  22
  23 static inline uint32_t amcc_wait_state_bits(unsigned int region, unsigned int num_wait_states)
  24 {
  25         return (num_wait_states & 0x7) << (-region * bits_per_region);
  26 };
  27
  28 enum amcc_prefetch_bits {
  29         PREFETCH_DISABLED = 0x0,
  30         PREFETCH_SMALL = 0x8,
  31         PREFETCH_MEDIUM = 0x10,
  32         PREFETCH_LARGE = 0x18,
  33 };
  34
  35 static inline uint32_t amcc_prefetch_bits(unsigned int region, enum amcc_prefetch_bits prefetch)
  36 {
  37         return prefetch << (--region * bits_per_region);
  38 };
  39
  40 static inline uint32_t amcc_PTADR_mode_bit(unsigned int region)
  41 {
  42         return 0x80 << (--region * bits_per_region);
  43 };
  44
  45 static inline uint32_t amcc_disable_write_fifo_bit(unsigned int region)
  46 {
  47         return 0x20 << (--region * bits_per_region);
  48 };
  49