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/*
* ADM5120 NAND interface definitions
*
* This header file defines the hardware registers of the ADM5120 SoC
* built-in NAND interface.
*
* Copyright (C) 2007 OpenWrt.org
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
*
* NAND interface routines was based on a driver for Linux 2.6.19+ which
* was derived from the driver for Linux 2.4.xx published by Mikrotik for
* their RouterBoard 1xx and 5xx series boards.
* Copyright (C) 2007 David Goodenough <david.goodenough@linkchoose.co.uk>
* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
* The original Mikrotik code seems not to have a license.
*
* 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 _ADM5120_NAND_H_
#define _ADM5120_NAND_H_
#include <linux/types.h>
#include <linux/io.h>
#include <adm5120_defs.h>
#include <adm5120_switch.h>
/* NAND control registers */
#define NAND_REG_DATA 0x0 /* data register */
#define NAND_REG_SET_CEn 0x1 /* CE# low */
#define NAND_REG_CLR_CEn 0x2 /* CE# high */
#define NAND_REG_CLR_CLE 0x3 /* CLE low */
#define NAND_REG_SET_CLE 0x4 /* CLE high */
#define NAND_REG_CLR_ALE 0x5 /* ALE low */
#define NAND_REG_SET_ALE 0x6 /* ALE high */
#define NAND_REG_SET_SPn 0x7 /* SP# low (use spare area) */
#define NAND_REG_CLR_SPn 0x8 /* SP# high (do not use spare area) */
#define NAND_REG_SET_WPn 0x9 /* WP# low */
#define NAND_REG_CLR_WPn 0xA /* WP# high */
#define NAND_REG_STATUS 0xB /* Status register */
#define ADM5120_NAND_STATUS_READY 0x80
#define NAND_READ_REG(r) \
readb((void __iomem *)KSEG1ADDR(ADM5120_NAND_BASE) + (r))
#define NAND_WRITE_REG(r, v) \
writeb((v),(void __iomem *)KSEG1ADDR(ADM5120_NAND_BASE) + (r))
/*-------------------------------------------------------------------------*/
static inline void adm5120_nand_enable(void)
{
SW_WRITE_REG(SWITCH_REG_BW_CNTL1, BW_CNTL1_NAND_ENABLE);
SW_WRITE_REG(SWITCH_REG_BOOT_DONE, 1);
}
static inline void adm5120_nand_set_wpn(unsigned int set)
{
NAND_WRITE_REG((set) ? NAND_REG_SET_WPn : NAND_REG_CLR_WPn, 1);
}
static inline void adm5120_nand_set_spn(unsigned int set)
{
NAND_WRITE_REG((set) ? NAND_REG_SET_SPn : NAND_REG_CLR_SPn, 1);
}
static inline void adm5120_nand_set_cle(unsigned int set)
{
NAND_WRITE_REG((set) ? NAND_REG_SET_CLE : NAND_REG_CLR_CLE, 1);
}
static inline void adm5120_nand_set_ale(unsigned int set)
{
NAND_WRITE_REG((set) ? NAND_REG_SET_ALE : NAND_REG_CLR_ALE, 1);
}
static inline void adm5120_nand_set_cen(unsigned int set)
{
NAND_WRITE_REG((set) ? NAND_REG_SET_CEn : NAND_REG_CLR_CEn, 1);
}
static inline u8 adm5120_nand_get_status(void)
{
return NAND_READ_REG(NAND_REG_STATUS);
}
#endif /* _ADM5120_NAND_H_ */
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