61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/***************************************************************************
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* Copyright (C) 2013 by Franck Jullien *
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* elec4fun@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "or1k_tap.h"
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#include "or1k.h"
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#include <jtag/jtag.h>
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#define OR1K_TAP_INST_DEBUG 0x8
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static int or1k_tap_mohor_init(struct or1k_jtag *jtag_info)
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{
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LOG_DEBUG("Initialising OpenCores JTAG TAP");
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/* Put TAP into state where it can talk to the debug interface
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* by shifting in correct value to IR.
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*/
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/* Ensure TAP is reset - maybe not necessary*/
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jtag_add_tlr();
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struct jtag_tap *tap = jtag_info->tap;
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struct scan_field field;
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uint8_t ir_value = OR1K_TAP_INST_DEBUG;
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field.num_bits = tap->ir_length;
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field.out_value = &ir_value;
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field.in_value = NULL;
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jtag_add_ir_scan(tap, &field, TAP_IDLE);
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return jtag_execute_queue();
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}
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static struct or1k_tap_ip mohor_tap = {
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.name = "mohor",
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.init = or1k_tap_mohor_init,
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};
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int or1k_tap_mohor_register(void)
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{
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list_add_tail(&mohor_tap.list, &tap_list);
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return 0;
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}
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