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105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/*
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* $Id$
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*
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* Copyright (C) 2003 ETC s.r.o.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Written by Bradley D. LaRonde <brad@ltc.com>, 2003.
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*
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*/
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#include "sysdep.h"
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <flash/cfi.h>
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#include <brux/cfi.h>
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#include <brux/bus.h>
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int
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jedec_detect( bus_t *bus, uint32_t adr, cfi_array_t **cfi_array )
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{
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unsigned int bw; /* bus width */
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int ba; /* bus width address multiplier */
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bus_area_t area;
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int mid;
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int did;
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cfi_query_structure_t *cfi;
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if (!cfi_array || !bus)
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return -1; /* invalid parameters */
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*cfi_array = calloc( 1, sizeof (cfi_array_t) );
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if (!*cfi_array)
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return -2; /* out of memory */
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(*cfi_array)->bus = bus;
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(*cfi_array)->address = adr;
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if (bus_area( bus, adr, &area ) != 0)
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return -8; /* bus width detection failed */
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bw = area.width;
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if (bw != 8 && bw != 16 && bw != 32)
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return -3; /* invalid bus width */
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(*cfi_array)->bus_width = ba = bw / 8;
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(*cfi_array)->cfi_chips = calloc( ba, sizeof (cfi_chip_t *) );
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if (!(*cfi_array)->cfi_chips)
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return -2; /* out of memory */
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/* Query flash. */
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bus_write( bus, 0x0, 0xf0 );
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bus_write( bus, 0xaaa, 0xaa );
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bus_write( bus, 0x555, 0x55 );
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bus_write( bus, 0xaaa, 0x90 );
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mid = bus_read( bus, 0x0);
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did = bus_read( bus, 0x2);
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bus_write( bus, 0x0, 0xf0 );
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printf( "%s: mid %x, did %x\n", __FUNCTION__, mid, did );
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if (mid != 0x01)
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return -1;
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(*cfi_array)->cfi_chips[0] = calloc( 1, sizeof (cfi_chip_t) );
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if (!(*cfi_array)->cfi_chips[0])
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return -2; /* out of memory */
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cfi = &(*cfi_array)->cfi_chips[0]->cfi;
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cfi->identification_string.pri_id_code = CFI_VENDOR_AMD_SCS;
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cfi->identification_string.pri_vendor_tbl = NULL;
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cfi->identification_string.alt_id_code = 0;
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cfi->identification_string.alt_vendor_tbl = NULL;
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cfi->device_geometry.number_of_erase_regions = 4;
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cfi->device_geometry.erase_block_regions =
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malloc( cfi->device_geometry.number_of_erase_regions * sizeof (cfi_erase_block_region_t) );
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if (!cfi->device_geometry.erase_block_regions)
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return -2; /* out of memory */
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cfi->device_geometry.erase_block_regions[0].erase_block_size = 16 * 1024;
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cfi->device_geometry.erase_block_regions[0].number_of_erase_blocks = 1;
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cfi->device_geometry.erase_block_regions[1].erase_block_size = 8 * 1024;
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cfi->device_geometry.erase_block_regions[1].number_of_erase_blocks = 2;
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cfi->device_geometry.erase_block_regions[2].erase_block_size = 32 * 1024;
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cfi->device_geometry.erase_block_regions[2].number_of_erase_blocks = 1;
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cfi->device_geometry.erase_block_regions[3].erase_block_size = 64 * 1024;
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cfi->device_geometry.erase_block_regions[3].number_of_erase_blocks = 15;
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return 0;
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}
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