linux-vybrid_public/include/asm-avr32/arch-at32ap/smc.h

/*
 * Static Memory Controller for AT32 chips
 *
 * Copyright (C) 2006 Atmel Corporation
 *
 * Inspired by the OMAP2 General-Purpose Memory Controller interface
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ARCH_AT32AP_SMC_H
#define __ARCH_AT32AP_SMC_H

/*
 * All timing parameters are in nanoseconds.
 */
struct smc_config {
	/* Delay from address valid to assertion of given strobe */
	u16		ncs_read_setup;
	u16		nrd_setup;
	u16		ncs_write_setup;
	u16		nwe_setup;

	/* Pulse length of given strobe */
	u16		ncs_read_pulse;
	u16		nrd_pulse;
	u16		ncs_write_pulse;
	u16		nwe_pulse;

	/* Total cycle length of given operation */
	u16		read_cycle;
	u16		write_cycle;

	/* Bus width in bytes */
	u8		bus_width;

	/*
	 * 0: Data is sampled on rising edge of NCS
	 * 1: Data is sampled on rising edge of NRD
	 */
	unsigned int	nrd_controlled:1;

	/*
	 * 0: Data is driven on falling edge of NCS
	 * 1: Data is driven on falling edge of NWR
	 */
	unsigned int	nwe_controlled:1;

	/*
	 * 0: Byte select access type
	 * 1: Byte write access type
	 */
	unsigned int	byte_write:1;
};

extern int smc_set_configuration(int cs, const struct smc_config *config);
extern struct smc_config *smc_get_configuration(int cs);

#endif /* __ARCH_AT32AP_SMC_H */