1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 /***************************************************************************
4 * Copyright (C) 2013 by Sergio Chico *
5 * sergio.chico@gmail.com *
6 ***************************************************************************/
15 #include <jtag/jtag.h>
17 #define OR1K_XILINX_TAP_INST_USER1 0x02
19 static int or1k_tap_xilinx_bscan_init(struct or1k_jtag *jtag_info)
21 LOG_DEBUG("Initialising Xilinx Internal JTAG TAP");
23 /* Put TAP into state where it can talk to the debug interface
24 * by shifting in correct value to IR.
27 /* Ensure TAP is reset - maybe not necessary*/
30 struct jtag_tap *tap = jtag_info->tap;
31 struct scan_field field;
32 uint8_t ir_value = OR1K_XILINX_TAP_INST_USER1;
34 field.num_bits = tap->ir_length;
35 field.out_value = &ir_value;
36 field.in_value = NULL;
38 jtag_add_ir_scan(tap, &field, TAP_IDLE);
40 return jtag_execute_queue();
43 static struct or1k_tap_ip xilinx_bscan_tap = {
44 .name = "xilinx_bscan",
45 .init = or1k_tap_xilinx_bscan_init,
48 int or1k_tap_xilinx_bscan_register(void)
50 list_add_tail(&xilinx_bscan_tap.list, &tap_list);