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[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [devs/] [flash/] [powerpc/] [moab/] [current/] [src/] [moab_nand_flash.c] - Rev 786
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//========================================================================== // // moab_nand_flash.c // // Flash programming for Toshiba NAND FLASH device on MOAB board // //========================================================================== // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. // // eCos 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 or (at your option) any later // version. // // eCos 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 eCos; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // As a special exception, if other files instantiate templates or use // macros or inline functions from this file, or you compile this file // and link it with other works to produce a work based on this file, // this file does not by itself cause the resulting work to be covered by // the GNU General Public License. However the source code for this file // must still be made available in accordance with section (3) of the GNU // General Public License v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): Gary Thomas <gary@mlbassoc.com> // Contributors: // Date: 2003-09-02 // Purpose: // Description: // //####DESCRIPTIONEND#### // //========================================================================== #include <cyg/infra/cyg_type.h> #define CYGARC_HAL_COMMON_EXPORT_CPU_MACROS #include <cyg/hal/ppc_regs.h> // Platform registers #include <cyg/hal/hal_io.h> // I/O macros #include <cyg/hal/hal_if.h> // Virtual vector interfaces // There's a single TC58256 or TC58DVG02 on the MOAB board. #define CYGHWR_DEVS_FLASH_TOSHIBA_TC58256 #define CYGHWR_DEVS_FLASH_TOSHIBA_TC58DVG02 #define CYGNUM_FLASH_BLANK (1) #define CYGNUM_FLASH_INTERLEAVE (1) #define CYGNUM_FLASH_WIDTH (8) #define CYGNUM_FLASH_SERIES (1) #define CYGNUM_FLASH_BASE (_MOAB_NAND) #define CYGHWR_FLASH_TC58XXX_CE moab_CE #define CYGHWR_FLASH_TC58XXX_CLE moab_CLE #define CYGHWR_FLASH_TC58XXX_ALE moab_ALE #define CYGHWR_FLASH_TC58XXX_RDY moab_RDY // // Select the NAND device - this will be held until the // entire command/data sequence has completed (which is // necessary for read sequential) // static void __inline__ moab_CE(int state) { cyg_uint32 gpio_or; HAL_READ_UINT32(GPIO_OR, gpio_or); if (state) { // Assert CE gpio_or &= ~_MOAB_CE; } else { // De-assert CE gpio_or |= _MOAB_CE; } HAL_WRITE_UINT32(GPIO_OR, gpio_or); } // // Prepare to send a command byte to the NAND interface // static void __inline__ moab_CLE(int state) { cyg_uint32 gpio_or; HAL_READ_UINT32(GPIO_OR, gpio_or); if (state) { // Assert CLE gpio_or |= _MOAB_CLE; } else { // De-assert CLE gpio_or &= ~_MOAB_CLE; } HAL_WRITE_UINT32(GPIO_OR, gpio_or); } // // Prepare to send address byte(s) to the NAND interface // static void __inline__ moab_ALE(int state) { cyg_uint32 gpio_or; HAL_READ_UINT32(GPIO_OR, gpio_or); if (state) { // Assert ALE gpio_or |= _MOAB_ALE; } else { // De-assert ALE gpio_or &= ~_MOAB_ALE; } HAL_WRITE_UINT32(GPIO_OR, gpio_or); } // // Wait until the NAND device is ready (after a long operation) // static bool __inline__ moab_RDY(void) { cyg_uint32 gpio_ir; HAL_READ_UINT32(GPIO_IR, gpio_ir); return ((gpio_ir & _MOAB_RDY) != 0); } #include <cyg/io/flash_tc58xxx.inl> // ------------------------------------------------------------------------ // EOF moab_nand_flash.c