drivers/gpib/include/amcc5920.h

/* SPDX-License-Identifier: GPL-2.0 */

/***************************************************************************
 *  Header for amcc5920 pci chip
 *
 *   copyright		  : (C) 2002 by Frank Mori Hess
 ***************************************************************************/

// plx pci chip registers and bits
enum amcc_registers {
	AMCC_INTCS_REG = 0x38,
	AMCC_PASS_THRU_REG	= 0x60,
};

enum amcc_incsr_bits {
	AMCC_ADDON_INTR_ENABLE_BIT = 0x2000,
	AMCC_ADDON_INTR_ACTIVE_BIT = 0x400000,
	AMCC_INTR_ACTIVE_BIT = 0x800000,
};

static const int bits_per_region = 8;

static inline uint32_t amcc_wait_state_bits(unsigned int region, unsigned int num_wait_states)
{
	return (num_wait_states & 0x7) << (--region * bits_per_region);
};

enum amcc_prefetch_bits {
	PREFETCH_DISABLED = 0x0,
	PREFETCH_SMALL = 0x8,
	PREFETCH_MEDIUM = 0x10,
	PREFETCH_LARGE = 0x18,
};

static inline uint32_t amcc_prefetch_bits(unsigned int region, enum amcc_prefetch_bits prefetch)
{
	return prefetch << (--region * bits_per_region);
};

static inline uint32_t amcc_PTADR_mode_bit(unsigned int region)
{
	return 0x80 << (--region * bits_per_region);
};

static inline uint32_t amcc_disable_write_fifo_bit(unsigned int region)
{
	return 0x20 << (--region * bits_per_region);
};