URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [devs/] [flash/] [arm/] [at91/] [v2_0/] [src/] [flash_query.c] - Rev 365
Go to most recent revision | Compare with Previous | Blame | View Log
//========================================================================== // // flash_query.c // // Flash programming - query device // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 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. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): gthomas // Contributors: gthomas // Date: 2001-07-17 // Purpose: // Description: // //####DESCRIPTIONEND#### // //========================================================================== #include "flash.h" #include <pkgconf/hal.h> #include <cyg/hal/hal_arch.h> #include <cyg/hal/hal_cache.h> #include CYGHWR_MEMORY_LAYOUT_H // // CAUTION! This code must be copied to RAM before execution. Therefore, // it must not contain any code which might be position dependent! // #define CNT 2000*1000*10 // At least 20ms int flash_query(unsigned short *data) { volatile unsigned short *ROM; int cnt, cache_on; HAL_DCACHE_IS_ENABLED(cache_on); if (cache_on) { HAL_DCACHE_SYNC(); HAL_DCACHE_DISABLE(); } ROM = (volatile unsigned short *)0x01010000; // Send lead-in sequence ROM[FLASH_Key_Addr0] = FLASH_Key0; ROM[FLASH_Key_Addr1] = FLASH_Key1; // Send 'identify' command ROM[FLASH_Key_Addr0] = FLASH_Read_ID; // Need a delay of 20ms! for (cnt = 0; cnt < 50000; cnt++) ; data[0] = ROM[0]; // Manufacturer code data[1] = ROM[1]; // Device identifier // Send lead-in sequence ROM[FLASH_Key_Addr0] = FLASH_Key0; ROM[FLASH_Key_Addr1] = FLASH_Key1; // Send 'reset' command ROM[FLASH_Key_Addr0] = FLASH_Reset; // Need a delay of 20ms! for (cnt = 0; cnt < 50000; cnt++) ; if (cache_on) { HAL_DCACHE_ENABLE(); } return 0; }
Go to most recent revision | Compare with Previous | Blame | View Log