90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*
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* ADM5120 NAND interface definitions
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*
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* This header file defines the hardware registers of the ADM5120 SoC
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* built-in NAND interface.
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*
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* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* NAND interface routines was based on a driver for Linux 2.6.19+ which
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* was derived from the driver for Linux 2.4.xx published by Mikrotik for
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* their RouterBoard 1xx and 5xx series boards.
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* Copyright (C) 2007 David Goodenough <david.goodenough@linkchoose.co.uk>
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* Copyright (C) 2007 Florian Fainelli <florian@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#ifndef _MACH_ADM5120_NAND_H
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#define _MACH_ADM5120_NAND_H
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#include <linux/types.h>
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#include <linux/io.h>
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#include <asm/mach-adm5120/adm5120_defs.h>
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#include <asm/mach-adm5120/adm5120_switch.h>
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/* NAND control registers */
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#define NAND_REG_DATA 0x0 /* data register */
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#define NAND_REG_SET_CEn 0x1 /* CE# low */
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#define NAND_REG_CLR_CEn 0x2 /* CE# high */
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#define NAND_REG_CLR_CLE 0x3 /* CLE low */
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#define NAND_REG_SET_CLE 0x4 /* CLE high */
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#define NAND_REG_CLR_ALE 0x5 /* ALE low */
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#define NAND_REG_SET_ALE 0x6 /* ALE high */
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#define NAND_REG_SET_SPn 0x7 /* SP# low (use spare area) */
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#define NAND_REG_CLR_SPn 0x8 /* SP# high (do not use spare area) */
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#define NAND_REG_SET_WPn 0x9 /* WP# low */
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#define NAND_REG_CLR_WPn 0xA /* WP# high */
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#define NAND_REG_STATUS 0xB /* Status register */
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#define ADM5120_NAND_STATUS_READY 0x80
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#define NAND_READ_REG(r) \
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readb((void __iomem *)KSEG1ADDR(ADM5120_NAND_BASE) + (r))
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#define NAND_WRITE_REG(r, v) \
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writeb((v), (void __iomem *)KSEG1ADDR(ADM5120_NAND_BASE) + (r))
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/*-------------------------------------------------------------------------*/
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static inline void adm5120_nand_enable(void)
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{
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SW_WRITE_REG(SWITCH_REG_BW_CNTL1, BW_CNTL1_NAND_ENABLE);
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SW_WRITE_REG(SWITCH_REG_BOOT_DONE, 1);
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}
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static inline void adm5120_nand_set_wpn(unsigned int set)
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{
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NAND_WRITE_REG((set) ? NAND_REG_SET_WPn : NAND_REG_CLR_WPn, 1);
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}
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static inline void adm5120_nand_set_spn(unsigned int set)
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{
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NAND_WRITE_REG((set) ? NAND_REG_SET_SPn : NAND_REG_CLR_SPn, 1);
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}
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static inline void adm5120_nand_set_cle(unsigned int set)
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{
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NAND_WRITE_REG((set) ? NAND_REG_SET_CLE : NAND_REG_CLR_CLE, 1);
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}
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static inline void adm5120_nand_set_ale(unsigned int set)
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{
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NAND_WRITE_REG((set) ? NAND_REG_SET_ALE : NAND_REG_CLR_ALE, 1);
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}
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static inline void adm5120_nand_set_cen(unsigned int set)
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{
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NAND_WRITE_REG((set) ? NAND_REG_SET_CEn : NAND_REG_CLR_CEn, 1);
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}
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static inline u8 adm5120_nand_get_status(void)
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{
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return NAND_READ_REG(NAND_REG_STATUS);
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}
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#endif /* _MACH_ADM5120_NAND_H */
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