1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
26 #include "binarybuffer.h"
33 #define _ARM_JTAG_SCAN_N_CHECK_
36 int arm_jtag_set_instr_error_handler(u8 *in_value, void *priv)
38 ERROR("setting the new JTAG instruction failed, debugging is likely to be broken");
43 int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr, error_handler_t *caller_error_handler)
45 jtag_device_t *device = jtag_get_device(jtag_info->chain_pos);
47 if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
51 field.device = jtag_info->chain_pos;
52 field.num_bits = device->ir_length;
53 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
54 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
55 field.out_mask = NULL;
56 field.in_value = NULL;
57 field.in_check_value = NULL;
58 field.in_check_mask = NULL;
59 field.in_handler = NULL;
60 field.in_handler_priv = NULL;
62 if (caller_error_handler)
64 jtag_add_ir_scan(1, &field, -1, caller_error_handler);
68 error_handler_t error_handler;
69 error_handler.error_handler = arm_jtag_set_instr_error_handler;
70 error_handler.error_handler_priv = NULL;
71 jtag_add_ir_scan(1, &field, -1, &error_handler);
75 free(field.out_value);
81 int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
83 if(jtag_info->cur_scan_chain != new_scan_chain)
85 #ifdef _ARM_JTAG_SCAN_N_CHECK_
86 u8 scan_n_check_value = 0x10;
90 field.device = jtag_info->chain_pos;
91 field.num_bits = jtag_info->scann_size;
92 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
93 buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
94 field.out_mask = NULL;
95 field.in_value = NULL;
96 #ifdef _ARM_JTAG_SCAN_N_CHECK_
97 field.in_check_value = &scan_n_check_value;
99 field.in_check_value = NULL;
101 field.in_check_mask = NULL;
102 field.in_handler = NULL;
103 field.in_handler_priv = NULL;
105 arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL);
106 jtag_add_dr_scan(1, &field, -1, NULL);
108 jtag_info->cur_scan_chain = new_scan_chain;
110 free(field.out_value);
116 int arm_jtag_reset_callback(enum jtag_event event, void *priv)
118 arm_jtag_t *jtag_info = priv;
120 if (event == JTAG_TRST_ASSERTED)
122 jtag_info->cur_scan_chain = 0;
128 int arm_jtag_setup_connection(arm_jtag_t *jtag_info)
130 jtag_info->scann_instr = 0x2;
131 jtag_info->cur_scan_chain = 0;
132 jtag_info->intest_instr = 0xc;
134 jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
139 /* read JTAG buffer into host-endian u32, flipping bit-order */
140 int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv)
143 *dest = flip_u32(le_to_h_u32(in_buf), 32);
147 /* read JTAG buffer into little-endian u32, flipping bit-order */
148 int arm_jtag_buf_to_le32_flip(u8 *in_buf, void *priv)
150 h_u32_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
154 /* read JTAG buffer into little-endian u16, flipping bit-order */
155 int arm_jtag_buf_to_le16_flip(u8 *in_buf, void *priv)
157 h_u16_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
161 /* read JTAG buffer into big-endian u32, flipping bit-order */
162 int arm_jtag_buf_to_be32_flip(u8 *in_buf, void *priv)
164 h_u32_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
168 /* read JTAG buffer into big-endian u16, flipping bit-order */
169 int arm_jtag_buf_to_be16_flip(u8 *in_buf, void *priv)
171 h_u16_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
175 /* read JTAG buffer into u8, flipping bit-order */
176 int arm_jtag_buf_to_8_flip(u8 *in_buf, void *priv)
179 *dest = flip_u32(le_to_h_u32(in_buf), 32) & 0xff;
183 /* not-flipping variants */
184 /* read JTAG buffer into host-endian u32 */
185 int arm_jtag_buf_to_u32(u8 *in_buf, void *priv)
188 *dest = le_to_h_u32(in_buf);
192 /* read JTAG buffer into little-endian u32 */
193 int arm_jtag_buf_to_le32(u8 *in_buf, void *priv)
195 h_u32_to_le(((u8*)priv), le_to_h_u32(in_buf));
199 /* read JTAG buffer into little-endian u16 */
200 int arm_jtag_buf_to_le16(u8 *in_buf, void *priv)
202 h_u16_to_le(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
206 /* read JTAG buffer into big-endian u32 */
207 int arm_jtag_buf_to_be32(u8 *in_buf, void *priv)
209 h_u32_to_be(((u8*)priv), le_to_h_u32(in_buf));
213 /* read JTAG buffer into big-endian u16 */
214 int arm_jtag_buf_to_be16(u8 *in_buf, void *priv)
216 h_u16_to_be(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
220 /* read JTAG buffer into u8 */
221 int arm_jtag_buf_to_8(u8 *in_buf, void *priv)
224 *dest = le_to_h_u32(in_buf) & 0xff;