2003-02-13 Marcel Telka <marcel@telka.sk>
* src/ixp425.c: Added bus driver for Intel IXP425 (Christian Pellegrin). * src/bus.h: Ditto. * src/jtag.c (main): Ditto. * src/Makefile.am (jtag_SOURCES): Added ixp425.c (Christian Pellegrin). git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@345 b68d4a1b-bc3d-0410-92ed-d4ac073336b7master
Marcel Telka
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 Christian Pellegrin <chri@ascensit.com>, 2003.
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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 "bus.h"
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/* IXP425 must be at position 0 in JTAG chain */
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static void
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select_flash( part *p)
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{
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part_set_signal( p, "EX_CS[0]", 1, 0 );
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part_set_signal( p, "EX_CS[1]", 1, 1 );
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part_set_signal( p, "EX_CS[2]", 1, 1 );
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part_set_signal( p, "EX_CS[3]", 1, 1 );
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part_set_signal( p, "EX_CS[4]", 1, 1 );
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part_set_signal( p, "EX_CS[5]", 1, 1 );
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part_set_signal( p, "EX_CS[6]", 1, 1 );
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part_set_signal( p, "EX_CS[7]", 1, 1 );
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}
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static void
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unselect_flash( part *p)
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{
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part_set_signal( p, "EX_CS[0]", 1, 1 );
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part_set_signal( p, "EX_CS[1]", 1, 1 );
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part_set_signal( p, "EX_CS[2]", 1, 1 );
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part_set_signal( p, "EX_CS[3]", 1, 1 );
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part_set_signal( p, "EX_CS[4]", 1, 1 );
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part_set_signal( p, "EX_CS[5]", 1, 1 );
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part_set_signal( p, "EX_CS[6]", 1, 1 );
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part_set_signal( p, "EX_CS[7]", 1, 1 );
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}
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static void
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set_gpio( 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 = 1; i < 16; i++) {
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sprintf( buff, "GPIO[%d]", i );
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part_set_signal( p, buff, 1, ( (a >> i) & 1 ) ^ 1 );
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}
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}
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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[15];
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set_gpio( p, a );
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for (i = 0; i < 24; i++) {
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sprintf( buff, "EX_ADDR[%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[15];
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for (i = 0; i < 16; i++) {
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sprintf( buff, "EX_DATA[%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[15];
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for (i = 0; i < 16; i++) {
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sprintf( buff, "EX_DATA[%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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void
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ixp425_bus_read_start( parts *ps, uint32_t adr )
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{
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part *p = ps->parts[0];
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select_flash( p );
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part_set_signal( p, "EX_RD", 1, 0 );
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part_set_signal( p, "EX_WR", 1, 1 );
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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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}
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uint32_t
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ixp425_bus_read_next( parts *ps, uint32_t adr )
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{
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part *p = ps->parts[0];
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setup_address( p, adr );
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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[15];
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uint32_t d = 0;
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for (i = 0; i < 16; i++) {
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sprintf( buff, "EX_DATA[%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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uint32_t
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ixp425_bus_read_end( parts *ps )
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{
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part *p = ps->parts[0];
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unselect_flash( p );
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part_set_signal( p, "EX_RD", 1, 1 );
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part_set_signal( p, "EX_WR", 1, 1 );
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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[15];
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uint32_t d = 0;
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for (i = 0; i < 16; i++) {
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sprintf( buff, "EX_DATA[%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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uint32_t
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ixp425_bus_read( parts *ps, uint32_t adr )
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{
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ixp425_bus_read_start( ps, adr );
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return ixp425_bus_read_end( ps );
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}
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void
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ixp425_bus_write( parts *ps, uint32_t adr, uint32_t data )
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{
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part *p = ps->parts[0];
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select_flash( p );
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part_set_signal( p, "EX_RD", 1, 1 );
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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, "EX_WR", 1, 0 );
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parts_shift_data_registers( ps );
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part_set_signal( p, "EX_WR", 1, 1 );
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unselect_flash( p );
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parts_shift_data_registers( ps );
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}
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int
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ixp425_bus_width( parts *ps )
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{
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return 16;
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}
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bus_driver_t ixp425_bus_driver = {
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ixp425_bus_width,
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ixp425_bus_read_start,
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ixp425_bus_read_next,
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ixp425_bus_read_end,
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ixp425_bus_read,
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ixp425_bus_write
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};
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