diff options
Diffstat (limited to 'target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_nand.h')
| -rw-r--r-- | target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_nand.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_nand.h b/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_nand.h new file mode 100644 index 0000000..8d86fc6 --- /dev/null +++ b/target/linux/adm5120/files/include/asm-mips/mach-adm5120/adm5120_nand.h @@ -0,0 +1,102 @@ +/* + * 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 + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#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(BW_CNTL1, BW_CNTL1_NAND_ENABLE); + SW_WRITE_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_ */ |