or1k_tap_xilinx_bscan.c

Go to the documentation of this file.

// SPDX-License-Identifier: GPL-2.0-or-later
 
/***************************************************************************
 *   Copyright (C) 2013 by Sergio Chico                                    *
 *   sergio.chico@gmail.com                                                *
 ***************************************************************************/
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include "or1k_tap.h"
#include "or1k.h"
 
#include <jtag/jtag.h>
 
#define OR1K_XILINX_TAP_INST_USER1  0x02
 
static int or1k_tap_xilinx_bscan_init(struct or1k_jtag *jtag_info)
{
    LOG_DEBUG("Initialising Xilinx Internal JTAG TAP");
 
    /* Put TAP into state where it can talk to the debug interface
     * by shifting in correct value to IR.
     */
 
    /* Ensure TAP is reset - maybe not necessary*/
    jtag_add_tlr();
 
    struct jtag_tap *tap = jtag_info->tap;
    struct scan_field field;
    uint8_t ir_value = OR1K_XILINX_TAP_INST_USER1;
 
    field.num_bits = tap->ir_length;
    field.out_value = &ir_value;
    field.in_value = NULL;
 
    jtag_add_ir_scan(tap, &field, TAP_IDLE);
 
    return jtag_execute_queue();
}
 
static struct or1k_tap_ip xilinx_bscan_tap = {
    .name = "xilinx_bscan",
    .init = or1k_tap_xilinx_bscan_init,
};
 
int or1k_tap_xilinx_bscan_register(void)
{
    list_add_tail(&xilinx_bscan_tap.list, &tap_list);
    return 0;
}