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254 lines
6.4 KiB
C
254 lines
6.4 KiB
C
/*
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* $Id$
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*
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* Flash driver for AMD Am29LV640D, Am29LV641D, Am29LV642D
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* Copyright (C) 2003 AH
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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 August Hörandl <august.hoerandl@gmx.at>
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*
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* Documentation:
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* [1] Advanced Micro Devices, "Am29LV640D/Am29LV641D",
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* September 20, 2002 Rev B, 22366b8.pdf
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* [2] Advanced Micro Devices, "Am29LV642D",
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* August 14, 2001 Rev A, 25022.pdf
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*
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*/
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#include <config.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <flash/cfi.h>
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#include <flash/intel.h>
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#include <unistd.h>
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#include "flash.h"
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#include "bus.h"
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static int dbg = 0;
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static int amd_flash_erase_block( bus_t *bus, uint32_t adr );
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static int amd_flash_unlock_block( bus_t *bus, uint32_t adr );
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static int amd_flash_program( bus_t *bus, uint32_t adr, uint32_t data );
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static void amd_flash_read_array( bus_t *bus );
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/* autodetect, we can handle this chip */
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static int
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amd_flash_autodetect( bus_t *bus, cfi_query_structure_t *cfi )
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{
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return (cfi->identification_string.pri_id_code == CFI_VENDOR_AMD_SCS);
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}
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/*
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* check device status
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* 1/true PASS
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* 0/false FAIL
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*/
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/*
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* first implementation: see [1], page 29
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*/
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#if 0
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static int
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amdstatus29( parts *ps, uint32_t adr, uint32_t data )
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{
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int o = 2;
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int timeout;
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uint32_t dq7mask = ((1 << 7) << 16) + (1 << 7);
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uint32_t dq5mask = ((1 << 5) << 16) + (1 << 5);
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uint32_t bit7 = (data & (1 << 7)) != 0;
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uint32_t data1;
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for (timeout = 0; timeout < 100; timeout++) {
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data1 = bus_read( ps, adr << o );
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data1 = bus_read( ps, adr << o );
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if (dbg)
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printf( "amdstatus %d: %04X (%04X) = %04X\n", timeout, data1, (data1 & dq7mask), bit7 );
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if (((data1 & dq7mask) == dq7mask) == bit7) /* FIXME: This looks non-portable */
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return 1;
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if ((data1 & dq5mask) == dq5mask)
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break;
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usleep( 100 );
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}
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data1 = bus_read( ps, adr << o );
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if (((data1 & dq7mask) == dq7mask) == bit7) /* FIXME: This looks non-portable */
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return 1;
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return 0;
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}
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#endif /* 0 */
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/*
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* second implementation: see [1], page 30
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*/
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static int
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amdstatus( bus_t *bus, uint32_t adr, int data )
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{
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int timeout;
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uint32_t togglemask = ((1 << 6) << 16) + (1 << 6); /* DQ 6 */
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/* int dq5mask = ((1 << 5) << 16) + (1 << 5); DQ5 */
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for (timeout = 0; timeout < 100; timeout++) {
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uint32_t data1 = bus_read( bus, adr );
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uint32_t data2 = bus_read( bus, adr );
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/*printf("amdstatus %d: %04X/%04X %04X/%04X \n", */
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/* timeout, data1, data2, (data1 & togglemask), (data2 & togglemask)); */
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if ( (data1 & togglemask) == (data2 & togglemask)) /* no toggle */
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return 1;
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/* if ( (data1 & dq5mask) != 0 ) TODO */
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/* return 0; */
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if (dbg)
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printf( "amdstatus %d: %04X/%04X\n", timeout, data1, data2 );
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else
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printf( "." );
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usleep( 100 );
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}
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return 0;
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}
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#if 0
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static int
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amdisprotected( parts *ps, uint32_t adr )
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{
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uint32_t data;
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int o = 2;
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bus_write( ps, 0x0555 << o, 0x00aa00aa ); /* autoselect p29, sector erase */
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bus_write( ps, 0x02aa << o, 0x00550055 );
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bus_write( ps, 0x0555 << o, 0x00900090 );
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data = bus_read( ps, adr + (0x0002 << 2) );
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/* Read Array */
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amd_flash_read_array( ps ); /* AMD reset */
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return ((data & 0x00ff00ff) != 0);
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}
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#endif /* 0 */
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static void
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amd_flash_print_info( bus_t *bus )
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{
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int o = 2;
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int mid, cid, prot;
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bus_write( bus, 0x0555 << o, 0x00aa00aa ); /* autoselect p29 */
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bus_write( bus, 0x02aa << o, 0x00550055 );
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bus_write( bus, 0x0555 << o, 0x00900090 );
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mid = bus_read( bus, 0x00 << o ) & 0xFFFF;
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cid = bus_read( bus, 0x01 << o ) & 0xFFFF;
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prot = bus_read( bus, 0x02 << o ) & 0xFF;
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amd_flash_read_array( bus ); /* AMD reset */
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printf( _("Chip: AMD Flash\n\tManufacturer: ") );
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switch (mid) {
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case 0x0001:
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printf( _("AMD") );
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break;
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default:
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printf( _("Unknown manufacturer (ID 0x%04x)"), mid );
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break;
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}
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printf( _("\n\tChip: ") );
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switch (cid) {
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case 0x22D7:
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printf( _("Am29LV640D/Am29LV641D/Am29LV642D") );
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break;
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default:
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printf ( _("Unknown (ID 0x%04x)"), cid );
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break;
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}
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printf( _("\n\tProtected: %04x\n"), prot );
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}
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static int
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amd_flash_erase_block( bus_t *bus, uint32_t adr )
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{
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int o = 2;
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printf("flash_erase_block 0x%08X\n", adr);
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/* printf("protected: %d\n", amdisprotected(ps, adr)); */
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bus_write( bus, 0x0555 << o, 0x00aa00aa ); /* autoselect p29, sector erase */
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bus_write( bus, 0x02aa << o, 0x00550055 );
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bus_write( bus, 0x0555 << o, 0x00800080 );
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bus_write( bus, 0x0555 << o, 0x00aa00aa );
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bus_write( bus, 0x02aa << o, 0x00550055 );
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bus_write( bus, adr, 0x00300030 );
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if (amdstatus( bus, adr, 0xffff )) {
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printf( "flash_erase_block 0x%08X DONE\n", adr );
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amd_flash_read_array( bus ); /* AMD reset */
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return 0;
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}
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printf( "flash_erase_block 0x%08X FAILED\n", adr );
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/* Read Array */
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amd_flash_read_array( bus ); /* AMD reset */
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return CFI_INTEL_ERROR_UNKNOWN;
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}
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static int
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amd_flash_unlock_block( bus_t *bus, uint32_t adr )
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{
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printf( "flash_unlock_block 0x%08X IGNORE\n", adr );
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return 0;
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}
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static int
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amd_flash_program( bus_t *bus, uint32_t adr, uint32_t data )
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{
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int o = 2;
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int status;
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if (dbg)
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printf("\nflash_program 0x%08X = 0x%08X\n", adr, data);
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bus_write( bus, 0x0555 << o, 0x00aa00aa ); /* autoselect p29, program */
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bus_write( bus, 0x02aa << o, 0x00550055 );
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bus_write( bus, 0x0555 << o, 0x00A000A0 );
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bus_write( bus, adr, data );
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status = amdstatus( bus, adr, data );
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/* amd_flash_read_array(ps); */
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return !status;
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}
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static void
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amd_flash_read_array( bus_t *bus )
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{
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/* Read Array */
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bus_write( bus, 0x0, 0x00F000F0 ); /* AMD reset */
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}
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flash_driver_t amd_32_flash_driver = {
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4, /* buswidth */
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N_("AMD/Fujitsu Standard Command Set"),
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N_("supported: AMD 29LV640D, 29LV641D, 29LV642D; 2x16 Bit"),
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amd_flash_autodetect,
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amd_flash_print_info,
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amd_flash_erase_block,
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amd_flash_unlock_block,
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amd_flash_program,
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amd_flash_read_array,
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};
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