89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/***************************************************************************
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* Copyright (C) 2005 by Dominic Rath *
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* Dominic.Rath@gmx.de *
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* *
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* Copyright (C) 2007,2008 Øyvind Harboe *
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* oyvind.harboe@zylin.com *
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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 "arm_jtag.h"
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#if 0
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#define _ARM_JTAG_SCAN_N_CHECK_
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#endif
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int arm_jtag_set_instr_inner(struct jtag_tap *tap,
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uint32_t new_instr, void *no_verify_capture, tap_state_t end_state)
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{
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struct scan_field field;
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uint8_t t[4] = { 0 };
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field.num_bits = tap->ir_length;
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field.out_value = t;
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buf_set_u32(t, 0, field.num_bits, new_instr);
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field.in_value = NULL;
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if (!no_verify_capture)
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jtag_add_ir_scan(tap, &field, end_state);
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else {
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/* FIX!!!! this is a kludge!!! arm926ejs.c should reimplement this arm_jtag_set_instr to
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* have special verification code.
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*/
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jtag_add_ir_scan_noverify(tap, &field, end_state);
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}
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return ERROR_OK;
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}
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int arm_jtag_scann_inner(struct arm_jtag *jtag_info, uint32_t new_scan_chain, tap_state_t end_state)
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{
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int retval = ERROR_OK;
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uint8_t out_value[4] = { 0 };
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buf_set_u32(out_value, 0, jtag_info->scann_size, new_scan_chain);
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struct scan_field field = { .num_bits = jtag_info->scann_size, .out_value = out_value, };
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retval = arm_jtag_set_instr(jtag_info->tap, jtag_info->scann_instr, NULL, end_state);
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if (retval != ERROR_OK)
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return retval;
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jtag_add_dr_scan(jtag_info->tap,
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1,
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&field,
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end_state);
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jtag_info->cur_scan_chain = new_scan_chain;
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return retval;
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}
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static int arm_jtag_reset_callback(enum jtag_event event, void *priv)
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{
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struct arm_jtag *jtag_info = priv;
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if (event == JTAG_TRST_ASSERTED)
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jtag_info->cur_scan_chain = 0;
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return ERROR_OK;
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}
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int arm_jtag_setup_connection(struct arm_jtag *jtag_info)
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{
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jtag_info->scann_instr = 0x2;
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jtag_info->cur_scan_chain = 0;
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jtag_info->intest_instr = 0xc;
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return jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
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}
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int arm_jtag_close_connection(struct arm_jtag *jtag_info)
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{
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return jtag_unregister_event_callback(arm_jtag_reset_callback, jtag_info);
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}
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