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/***************************************************************************
* Copyright (C) 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* 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. *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "arm_jtag.h"
#if 0
#define _ARM_JTAG_SCAN_N_CHECK_
#endif
int arm_jtag_set_instr(struct arm_jtag *jtag_info, uint32_t new_instr, void *no_verify_capture)
{
struct jtag_tap *tap;
tap = jtag_info->tap;
if (tap == NULL)
return ERROR_FAIL;
if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr)
{
struct scan_field field;
uint8_t t[4];
field.tap = tap;
field.num_bits = tap->ir_length;
field.out_value = t;
buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
field.in_value = NULL;
if (no_verify_capture == NULL)
{
jtag_add_ir_scan(1, &field, jtag_get_end_state());
} else
{
/* FIX!!!! this is a kludge!!! arm926ejs.c should reimplement this arm_jtag_set_instr to
* have special verification code.
*/
jtag_add_ir_scan_noverify(1, &field, jtag_get_end_state());
}
}
return ERROR_OK;
}
int arm_jtag_scann(struct arm_jtag *jtag_info, uint32_t new_scan_chain)
{
int retval = ERROR_OK;
if (jtag_info->cur_scan_chain != new_scan_chain)
{
uint32_t values[1];
int num_bits[1];
values[0]=new_scan_chain;
num_bits[0]=jtag_info->scann_size;
if ((retval = arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL)) != ERROR_OK)
{
return retval;
}
jtag_add_dr_out(jtag_info->tap,
1,
num_bits,
values,
jtag_get_end_state());
jtag_info->cur_scan_chain = new_scan_chain;
}
return retval;
}
int arm_jtag_reset_callback(enum jtag_event event, void *priv)
{
struct arm_jtag *jtag_info = priv;
if (event == JTAG_TRST_ASSERTED)
{
jtag_info->cur_scan_chain = 0;
}
return ERROR_OK;
}
int arm_jtag_setup_connection(struct arm_jtag *jtag_info)
{
jtag_info->scann_instr = 0x2;
jtag_info->cur_scan_chain = 0;
jtag_info->intest_instr = 0xc;
return jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
}
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