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130 lines
2.8 KiB
C
130 lines
2.8 KiB
C
22 years ago
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/*
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* $Id$
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*
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* Copyright (C) 2002 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 Marcel Telka <marcel@telka.sk>, 2002.
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*
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*/
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#include <stdint.h>
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#include "part.h"
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#include "pxa250.h"
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/* PXA250 must be in position 0 */
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static void
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setup_address( part *p, uint32_t a )
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{
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int i;
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char buff[10];
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for (i = 0; i < 26; i++) {
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sprintf( buff, "MA[%d]", i );
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part_set_signal( p, buff, 1, (a >> i) & 1 );
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}
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}
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static void
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set_data_in( part *p )
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{
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int i;
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char buff[10];
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for (i = 0; i < 32; i++) {
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sprintf( buff, "MD[%d]", i );
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part_set_signal( p, buff, 0, 0 );
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}
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}
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static void
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setup_data( part *p, uint32_t d )
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{
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int i;
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char buff[10];
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for (i = 0; i < 32; i++) {
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sprintf( buff, "MD[%d]", i );
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part_set_signal( p, buff, 1, (d >> i) & 1 );
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}
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}
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uint32_t
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pxa250_bus_read( parts *ps, uint32_t adr )
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{
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part *p = ps->parts[0];
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part_set_signal( p, "nCS[0]", 1, 0 );
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part_set_signal( p, "DQM[0]", 1, 0 );
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part_set_signal( p, "DQM[1]", 1, 0 );
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part_set_signal( p, "DQM[2]", 1, 0 );
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part_set_signal( p, "DQM[3]", 1, 0 );
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part_set_signal( p, "RDnWR", 1, 1 );
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part_set_signal( p, "nWE", 1, 1 );
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part_set_signal( p, "nOE", 1, 0 );
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part_set_signal( p, "nSDCAS", 1, 0 );
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setup_address( p, adr );
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set_data_in( p );
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parts_shift_data_registers( ps );
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parts_shift_data_registers( ps );
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{
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int i;
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char buff[10];
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uint32_t d = 0;
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for (i = 0; i < 32; i++) {
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sprintf( buff, "MD[%d]", i );
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d |= (uint32_t) (part_get_signal( p, buff ) << i);
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}
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return d;
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}
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}
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void
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pxa250_bus_write( parts *ps, uint32_t adr, uint32_t data )
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{
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/* see Figure 6-17 in PXA doc */
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part *p = ps->parts[0];
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part_set_signal( p, "nCS[0]", 1, 0 );
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part_set_signal( p, "DQM[0]", 1, 0 );
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part_set_signal( p, "DQM[1]", 1, 0 );
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part_set_signal( p, "DQM[2]", 1, 0 );
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part_set_signal( p, "DQM[3]", 1, 0 );
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part_set_signal( p, "RDnWR", 1, 0 );
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part_set_signal( p, "nWE", 1, 1 );
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part_set_signal( p, "nOE", 1, 1 );
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part_set_signal( p, "nSDCAS", 1, 0 );
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setup_address( p, adr );
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setup_data( p, data );
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parts_shift_data_registers( ps );
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part_set_signal( p, "nWE", 1, 0 );
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parts_shift_data_registers( ps );
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part_set_signal( p, "nWE", 1, 1 );
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parts_shift_data_registers( ps );
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}
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