2004-08-19 Marcel Telka <marcel@telka.sk>
* src/bus/Makefile.am (libbus_a_SOURCES): Added tx4925.c (patch 972625, Andrew Dyer). * src/bus/buses.c (bus_drivers): Added tx4925_bus (patch 972625, Andrew Dyer). * src/bus/buses.h: Ditto. * src/bus/tx4925.c: New file (patch 972625, Andrew Dyer). git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@608 b68d4a1b-bc3d-0410-92ed-d4ac073336b7master
Marcel Telka
21 years ago
parent
1783d95ef5
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/*
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* $Id$
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*
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* Copyright (C) 2003 RightHand Technologies, Inc.
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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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* Christian Pellegrin <chri@ascensit.com>, 2003.
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* Modified by Marcel Telka <marcel@telka.sk>, 2003.
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* Modified by Andrew Dyer <adyer@righthandtech.com>, 2003.
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*
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*/
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#include "sysdep.h"
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include "part.h"
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#include "bus.h"
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#include "chain.h"
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#include "bssignal.h"
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#include "jtag.h"
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#include "buses.h"
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// FIXME board level write protect is ignored here
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// should be okay because pin isn't implemented
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// on 29LV200 we use now.
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typedef struct {
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chain_t *chain;
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part_t *part;
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signal_t *oe;
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signal_t *swe;
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signal_t *romce[4];
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signal_t *sdcs[4];
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signal_t *addr[20];
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signal_t *data[16];
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} bus_params_t;
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#define CHAIN ((bus_params_t *) bus->params)->chain
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#define PART ((bus_params_t *) bus->params)->part
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#define OE ((bus_params_t *) bus->params)->oe
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#define SWE ((bus_params_t *) bus->params)->swe
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#define ROMCE ((bus_params_t *) bus->params)->romce
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#define SDCS ((bus_params_t *) bus->params)->sdcs
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#define ADDR ((bus_params_t *) bus->params)->addr
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#define DATA ((bus_params_t *) bus->params)->data
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static void
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select_flash( bus_t *bus )
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{
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part_t *p = PART;
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part_set_signal( p, ROMCE[0], 1, 0 );
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part_set_signal( p, ROMCE[1], 1, 1 );
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part_set_signal( p, ROMCE[2], 1, 1 );
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part_set_signal( p, ROMCE[3], 1, 1 );
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part_set_signal( p, SDCS[0], 1, 1 );
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part_set_signal( p, SDCS[1], 1, 1 );
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part_set_signal( p, SDCS[2], 1, 1 );
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part_set_signal( p, SDCS[3], 1, 1 );
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}
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static void
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unselect_flash( bus_t *bus )
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{
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part_t *p = PART;
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part_set_signal( p, ROMCE[0], 1, 1 );
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part_set_signal( p, ROMCE[1], 1, 1 );
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part_set_signal( p, ROMCE[2], 1, 1 );
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part_set_signal( p, ROMCE[3], 1, 1 );
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part_set_signal( p, SDCS[0], 1, 1 );
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part_set_signal( p, SDCS[1], 1, 1 );
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part_set_signal( p, SDCS[2], 1, 1 );
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part_set_signal( p, SDCS[3], 1, 1 );
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}
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// the number of bytes wide that the TX4925
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// CS0 signal is set to by the external
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// config resistors on A13/A12 at reset
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// 1, 2, or 4 are legal values
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#define TX4925_FLASH_CS_WIDTH 2
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static void
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setup_address( bus_t *bus, uint32_t a )
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{
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int i;
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part_t *p = PART;
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int addr_shift = (TX4925_FLASH_CS_WIDTH / 2);
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for (i = 0; i < 20; i++)
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part_set_signal( p, ADDR[i], 1, (a >> (i+addr_shift)) & 1 );
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}
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static void
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set_data_in( bus_t *bus )
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{
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int i;
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part_t *p = PART;
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for (i = 0; i < 16; i++)
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part_set_signal( p, DATA[i], 0, 0 );
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}
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static void
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setup_data( bus_t *bus, uint32_t d )
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{
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int i;
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part_t *p = PART;
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for (i = 0; i < 16; i++)
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part_set_signal( p, DATA[i], 1, (d >> i) & 1 );
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}
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static void
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tx4925_bus_printinfo( bus_t *bus )
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{
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int i;
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for (i = 0; i < CHAIN->parts->len; i++)
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if (PART == CHAIN->parts->parts[i])
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break;
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printf( _("Toshiba TX4925 compatible bus driver via BSR (JTAG part No. %d)\n"), i );
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}
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static void
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tx4925_bus_prepare( bus_t *bus )
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{
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part_set_instruction( PART, "EXTEST" );
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chain_shift_instructions( CHAIN );
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}
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static void
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tx4925_bus_read_start( bus_t *bus, uint32_t adr )
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{
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part_t *p = PART;
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chain_t *chain = CHAIN;
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select_flash( bus );
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setup_address( bus, adr );
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part_set_signal( p, OE, 1, 0 );
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part_set_signal( p, SWE, 1, 1 );
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set_data_in( bus );
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chain_shift_data_registers( chain, 0 );
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}
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static uint32_t
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tx4925_bus_read_next( bus_t *bus, uint32_t adr )
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{
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part_t *p = PART;
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chain_t *chain = CHAIN;
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int i;
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uint32_t d = 0;
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setup_address( bus, adr );
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chain_shift_data_registers( chain, 1 );
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for (i = 0; i < 16; i++)
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d |= (uint32_t) (part_get_signal( p, DATA[i] ) << i);
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return d;
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}
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static uint32_t
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tx4925_bus_read_end( bus_t *bus )
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{
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part_t *p = PART;
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chain_t *chain = CHAIN;
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int i;
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uint32_t d = 0;
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unselect_flash( bus );
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part_set_signal( p, OE, 1, 1 );
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part_set_signal( p, SWE, 1, 1 );
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chain_shift_data_registers( chain, 1 );
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for (i = 0; i < 16; i++)
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d |= (uint32_t) (part_get_signal( p, DATA[i] ) << i);
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return d;
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}
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static uint32_t
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tx4925_bus_read( bus_t *bus, uint32_t adr )
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{
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tx4925_bus_read_start( bus, adr );
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return tx4925_bus_read_end( bus );
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}
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static void
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tx4925_bus_write( bus_t *bus, uint32_t adr, uint32_t data )
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{
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part_t *p = PART;
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chain_t *chain = CHAIN;
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select_flash( bus );
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part_set_signal( p, OE, 1, 1 );
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setup_address( bus, adr );
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setup_data( bus, data );
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chain_shift_data_registers( chain, 0 );
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part_set_signal( p, SWE, 1, 0 );
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chain_shift_data_registers( chain, 0 );
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part_set_signal( p, SWE, 1, 1 );
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unselect_flash( bus );
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chain_shift_data_registers( chain, 0 );
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}
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static int
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tx4925_bus_area( bus_t *bus, uint32_t adr, bus_area_t *area )
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{
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area->description = NULL;
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area->start = UINT32_C(0x00000000);
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area->length = UINT64_C(0x100000000);
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area->width = 16;
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return 0;
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}
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static void
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tx4925_bus_free( bus_t *bus )
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{
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free( bus->params );
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free( bus );
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}
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static bus_t *tx4925_bus_new( void );
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const bus_driver_t tx4925_bus = {
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"tx4925",
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N_("Toshiba TX4925 compatible bus driver via BSR"),
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tx4925_bus_new,
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tx4925_bus_free,
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tx4925_bus_printinfo,
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tx4925_bus_prepare,
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tx4925_bus_area,
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tx4925_bus_read_start,
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tx4925_bus_read_next,
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tx4925_bus_read_end,
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tx4925_bus_read,
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tx4925_bus_write
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};
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static bus_t *
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tx4925_bus_new( void )
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{
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bus_t *bus;
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char buff[15];
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int i;
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int failed = 0;
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if (!chain || !chain->parts || chain->parts->len <= chain->active_part || chain->active_part < 0)
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return NULL;
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bus = malloc( sizeof (bus_t) );
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if (!bus)
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return NULL;
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bus->driver = &tx4925_bus;
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bus->params = malloc( sizeof (bus_params_t) );
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if (!bus->params) {
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free( bus );
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return NULL;
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}
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CHAIN = chain;
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PART = chain->parts->parts[chain->active_part];
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OE = part_find_signal( PART, "OE" );
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if (!OE) {
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printf( _("signal '%s' not found\n"), "OE" );
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failed = 1;
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}
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SWE = part_find_signal( PART, "SWE" );
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if (!SWE) {
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printf( _("signal '%s' not found\n"), "SWE" );
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failed = 1;
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}
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for (i = 0; i < 4; i++) {
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sprintf( buff, "ROMCE_%d", i );
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ROMCE[i] = part_find_signal( PART, buff );
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if (!ROMCE[i]) {
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printf( _("signal '%s' not found\n"), buff );
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failed = 1;
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break;
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}
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}
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for (i = 0; i < 4; i++) {
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sprintf( buff, "SDCS_%d", i );
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SDCS[i] = part_find_signal( PART, buff );
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if (!SDCS[i]) {
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printf( _("signal '%s' not found\n"), buff );
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failed = 1;
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break;
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}
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}
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for (i = 0; i < 20; i++) {
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sprintf( buff, "ADDR_%d", i );
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ADDR[i] = part_find_signal( PART, buff );
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if (!ADDR[i]) {
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printf( _("signal '%s' not found\n"), buff );
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failed = 1;
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break;
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}
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}
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for (i = 0; i < 16; i++) {
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sprintf( buff, "DATA_%d", i );
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DATA[i] = part_find_signal( PART, buff );
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if (!DATA[i]) {
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printf( _("signal '%s' not found\n"), buff );
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failed = 1;
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break;
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}
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}
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if (failed) {
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free( bus->params );
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free( bus );
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return NULL;
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}
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return bus;
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}
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