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Added initial TAP implementation.

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git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@66 b68d4a1b-bc3d-0410-92ed-d4ac073336b7
master
Marcel Telka 23 years ago
parent 36debc14fb
commit 2513cb95e6
6 changed files with 483 additions and 0 deletions
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3
jtag/src/tap/.cvsignore
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Makefile
Makefile.in
.deps

32
jtag/src/tap/Makefile.am
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#
# $Id$
#
# Copyright (C) 2002 ETC s.r.o.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
# Written by Marcel Telka <marcel@telka.sk>, 2002.
#
noinst_LIBRARIES = libtap.a
libtap_a_SOURCES = \
ctrl.c \
tap.c \
register.c \
state.c
INCLUDES = -I$(top_srcdir)/include

81
jtag/src/tap/ctrl.c
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/*
* $Id$
*
* Copyright (C) 2002 ETC s.r.o.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by Marcel Telka <marcel@telka.sk>, 2002.
*
*/
#include <sys/io.h>
#include <jtag/ctrl.h>
#include <jtag/state.h>
#define TCK 0
#define TDI 1
#define TMS 2
#define TRST 4
#define TDO 7
static unsigned short int port = 0x378;
void
tap_init( void )
{
tap_state_init();
ioperm( port, 2, 1 );
tap_state_set_trst( (inb( port ) >> TRST) & 1 );
}
void
tap_done( void )
{
ioperm( port, 2, 0 );
tap_state_done();
}
void
tap_clock( int tms, int tdi )
{
int trst = tap_state_get_trst();
tms &= 1;
tdi &= 1;
outb( (trst << TRST) | (0 << TCK) | (tms << TMS) | (tdi << TDI), port );
outb( (trst << TRST) | (1 << TCK) | (tms << TMS) | (tdi << TDI), port );
tap_state_clock( tms );
}
int
tap_get_tdo( void )
{
outb( (tap_state_get_trst() << TRST) | (0 << TCK), port );
return ((inb( port + 1 ) >> TDO) & 1) ^ 1;
}
void
tap_set_trst( int new_trst )
{
tap_state_set_trst( new_trst );
outb( (new_trst & 1) << TRST, port );
}

136
jtag/src/tap/register.c
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/*
* $Id$
*
* Copyright (C) 2002 ETC s.r.o.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by Marcel Telka <marcel@telka.sk>, 2002.
*
*/
#include <stdlib.h>
#include <string.h>
#include <jtag/register.h>
tap_register *
register_alloc( int len )
{
tap_register *tr;
if (len < 1)
return NULL;
tr = malloc( sizeof (tap_register) );
if (!tr)
return NULL;
tr->data = malloc( len );
if (!tr->data) {
free( tr );
return NULL;
}
tr->string = malloc( len + 1 );
if (!tr->string) {
free( tr->data );
free( tr );
return NULL;
}
tr->len = len;
tr->string[len] = '\0';
return tr;
}
void
register_free( tap_register *tr )
{
if (tr) {
free( tr->data );
free( tr->string );
}
free( tr );
}
tap_register *
register_fill( tap_register *tr, int val )
{
if (tr)
memset( tr->data, val & 1, tr->len );
return tr;
}
const char *
register_get_string( tap_register *tr )
{
if (tr) {
int i;
for (i = 0; i < tr->len; i++)
tr->string[tr->len - 1 - i] = (tr->data[i] & 1) ? '1' : '0';
}
return tr->string;
}
tap_register *
register_init( tap_register *tr, const char *value )
{
int i;
const char *p;
if (!value || !tr)
return tr;
p = strchr( value, '\0' );
for (i = 0; i < tr->len; i++) {
if (p == value)
tr->data[i] = 0;
else {
p--;
tr->data[i] = (*p == '0') ? 0 : 1;
}
}
return tr;
}
int
register_compare( const tap_register *tr, const tap_register *tr2 )
{
int i;
if (!tr && !tr2)
return 0;
if (!tr || !tr2)
return 1;
if (tr->len != tr2->len)
return 1;
for (i = 0; i < tr->len; i++)
if (tr->data[i] != tr2->data[i])
return 1;
return 0;
}

147
jtag/src/tap/state.c
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/*
* $Id$
*
* TAP state handling
* Copyright (C) 2002 ETC s.r.o.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by Marcel Telka <marcel@telka.sk>, 2002.
*
*/
#include <jtag/state.h>
static int state = Unknown_State;
static int trst = 0;
int
tap_state( void )
{
return state;
}
int
tap_state_init( void )
{
return state = Unknown_State;
}
int
tap_state_done( void )
{
return state = Unknown_State;
}
int
tap_state_set_trst( int new_trst )
{
if (trst != (new_trst & 1)) {
if (trst)
state = Unknown_State;
else
state = Test_Logic_Reset;
trst = new_trst & 1;
}
return state;
}
int
tap_state_clock( int tms )
{
if (tms & 1) {
switch (state) {
case Test_Logic_Reset:
break;
case Run_Test_Idle:
case Update_DR:
case Update_IR:
state = Select_DR_Scan;
break;
case Select_DR_Scan:
state = Select_IR_Scan;
break;
case Capture_DR:
case Shift_DR:
state = Exit1_DR;
break;
case Exit1_DR:
case Exit2_DR:
state = Update_DR;
break;
case Pause_DR:
state = Exit2_DR;
break;
case Select_IR_Scan:
state = Test_Logic_Reset;
break;
case Capture_IR:
case Shift_IR:
state = Exit1_IR;
break;
case Exit1_IR:
case Exit2_IR:
state = Update_IR;
break;
case Pause_IR:
state = Exit2_IR;
break;
default:
state = Unknown_State;
break;
}
} else {
switch (state) {
case Test_Logic_Reset:
case Run_Test_Idle:
case Update_DR:
case Update_IR:
state = Run_Test_Idle;
break;
case Select_DR_Scan:
state = Capture_DR;
break;
case Capture_DR:
case Shift_DR:
case Exit2_DR:
state = Shift_DR;
break;
case Exit1_DR:
case Pause_DR:
state = Pause_DR;
break;
case Select_IR_Scan:
state = Capture_IR;
break;
case Capture_IR:
case Shift_IR:
case Exit2_IR:
state = Shift_IR;
break;
case Exit1_IR:
case Pause_IR:
state = Pause_IR;
break;
default:
state = Unknown_State;
break;
}
}
return state;
}

84
jtag/src/tap/tap.c
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/*
* $Id$
*
* Copyright (C) 2002 ETC s.r.o.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by Marcel Telka <marcel@telka.sk>, 2002.
*
*/
#include <stdio.h>
#include <jtag/register.h>
#include <jtag/tap.h>
#include <jtag/ctrl.h>
#include <jtag/state.h>
void
tap_reset( void )
{
tap_clock( 1, 0 );
tap_clock( 1, 0 );
tap_clock( 1, 0 );
tap_clock( 1, 0 );
tap_clock( 1, 0 ); /* Test-Logic-Reset */
tap_clock( 0, 0 ); /* Run-Test/Idle */
}
void
tap_shift_register( const tap_register *in, tap_register *out, int exit )
{
int i;
/* Capture-DR, Capture-IR, Shift-DR, Shift-IR, Exit2-DR or Exit2-IR state */
if (tap_state() & TAPSTAT_CAPTURE)
tap_clock( 0, 0 ); /* save last TDO bit :-) */
for (i = 0; i < in->len; i++) {
if (out && (i < out->len))
out->data[i] = tap_get_tdo();
tap_clock( (exit && ((i + 1) == in->len)) ? 1 : 0, in->data[i] ); /* Shift (& Exit1) */
}
/* Shift-DR, Shift-IR, Exit1-DR or Exit1-IR state */
if (exit)
tap_clock( 1, 0 ); /* Update-DR or Update-IR */
}
void
tap_capture_dr( void )
{
/* Run-Test/Idle or Update-DR or Update-IR state */
tap_clock( 1, 0 ); /* Select-DR-Scan */
tap_clock( 0, 0 ); /* Capture-DR */
}
void
tap_capture_ir( void )
{
/* Run-Test/Idle or Update-DR or Update-IR state */
tap_clock( 1, 0 ); /* Select-DR-Scan */
tap_clock( 1, 0 ); /* Select-IR-Scan */
tap_clock( 0, 0 ); /* Capture-IR */
}
void
write_command( const tap_register *c, tap_register *cout, int len )
{
tap_capture_ir();
tap_shift_register( c, cout, 1 );
}
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