1 //==========================================================================
5 // Flash programming - query device
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
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30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
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34 // this file might be covered by the GNU General Public License.
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37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
44 // Contributors: gthomas
49 //####DESCRIPTIONEND####
51 //==========================================================================
55 #include <pkgconf/hal.h>
56 #include <cyg/hal/hal_arch.h>
57 #include <cyg/hal/hal_cache.h>
58 #include CYGHWR_MEMORY_LAYOUT_H
61 // CAUTION! This code must be copied to RAM before execution. Therefore,
62 // it must not contain any code which might be position dependent!
65 #define CNT 2000*1000*10 // At least 20ms
68 flash_query(unsigned short *data)
70 volatile unsigned short *ROM;
73 HAL_DCACHE_IS_ENABLED(cache_on);
79 ROM = (volatile unsigned short *)0x01010000;
81 // Send lead-in sequence
82 ROM[FLASH_Key_Addr0] = FLASH_Key0;
83 ROM[FLASH_Key_Addr1] = FLASH_Key1;
85 // Send 'identify' command
86 ROM[FLASH_Key_Addr0] = FLASH_Read_ID;
88 // Need a delay of 20ms!
89 for (cnt = 0; cnt < 50000; cnt++) ;
91 data[0] = ROM[0]; // Manufacturer code
92 data[1] = ROM[1]; // Device identifier
94 // Send lead-in sequence
95 ROM[FLASH_Key_Addr0] = FLASH_Key0;
96 ROM[FLASH_Key_Addr1] = FLASH_Key1;
98 // Send 'reset' command
99 ROM[FLASH_Key_Addr0] = FLASH_Reset;
101 // Need a delay of 20ms!
102 for (cnt = 0; cnt < 50000; cnt++) ;