src/target/arm_jtag.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   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.                                   *
   9  *                                                                         *
  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.                          *
  14  *                                                                         *
  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  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm_jtag.h"
  25
  26 #include "binarybuffer.h"
  27 #include "log.h"
  28 #include "jtag.h"
  29
  30 #include <stdlib.h>
  31
  32 #if 0
  33 #define _ARM_JTAG_SCAN_N_CHECK_
  34 #endif
  35
  36 int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr,  in_handler_t handler)
  37 {
  38         jtag_device_t *device = jtag_get_device(jtag_info->chain_pos);
  39
  40         if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
  41         {
  42                 scan_field_t field;
  43
  44                 field.device = jtag_info->chain_pos;
  45                 field.num_bits = device->ir_length;
  46                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  47                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  48                 field.out_mask = NULL;
  49                 field.in_value = NULL;
  50                 field.in_check_value = NULL;
  51                 field.in_check_mask = NULL;
  52                 field.in_handler = handler;
  53                 field.in_handler_priv = NULL;
  54                 jtag_add_ir_scan(1, &field, -1);
  55
  56
  57                 free(field.out_value);
  58         }
  59
  60         return ERROR_OK;
  61 }
  62
  63 int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
  64 {
  65         if(jtag_info->cur_scan_chain != new_scan_chain)
  66         {
  67 #ifdef _ARM_JTAG_SCAN_N_CHECK_
  68                 u8 scan_n_check_value = 1 << (jtag_info->scann_size - 1);
  69 #endif
  70                 scan_field_t field;
  71
  72                 field.device = jtag_info->chain_pos;
  73                 field.num_bits = jtag_info->scann_size;
  74                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  75                 buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
  76                 field.out_mask = NULL;
  77                 field.in_value = NULL;
  78 #ifdef _ARM_JTAG_SCAN_N_CHECK_
  79                 jtag_set_check_value(&field, &scan_n_check_value, NULL, NULL, NULL);
  80 #else
  81                 field.in_handler = NULL;
  82                 field.in_handler_priv = NULL;
  83 #endif
  84
  85
  86                 arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL);
  87                 jtag_add_dr_scan(1, &field, -1);
  88
  89                 jtag_info->cur_scan_chain = new_scan_chain;
  90
  91                 free(field.out_value);
  92         }
  93
  94         return ERROR_OK;
  95 }
  96
  97 int arm_jtag_reset_callback(enum jtag_event event, void *priv)
  98 {
  99         arm_jtag_t *jtag_info = priv;
 100
 101         if (event == JTAG_TRST_ASSERTED)
 102         {
 103                 jtag_info->cur_scan_chain = 0;
 104         }
 105
 106         return ERROR_OK;
 107 }
 108
 109 int arm_jtag_setup_connection(arm_jtag_t *jtag_info)
 110 {
 111         jtag_info->scann_instr = 0x2;
 112         jtag_info->cur_scan_chain = 0;
 113         jtag_info->intest_instr = 0xc;
 114
 115         jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
 116
 117         return ERROR_OK;
 118 }
 119
 120 /* read JTAG buffer into host-endian u32, flipping bit-order */
 121 int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 122 {
 123         u32 *dest = priv;
 124         *dest = flip_u32(le_to_h_u32(in_buf), 32);
 125         return ERROR_OK;
 126 }
 127
 128 /* read JTAG buffer into little-endian u32, flipping bit-order */
 129 int arm_jtag_buf_to_le32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 130 {
 131         h_u32_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
 132         return ERROR_OK;
 133 }
 134
 135 /* read JTAG buffer into little-endian u16, flipping bit-order */
 136 int arm_jtag_buf_to_le16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 137 {
 138         h_u16_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
 139         return ERROR_OK;
 140 }
 141
 142 /* read JTAG buffer into big-endian u32, flipping bit-order */
 143 int arm_jtag_buf_to_be32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 144 {
 145         h_u32_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
 146         return ERROR_OK;
 147 }
 148
 149 /* read JTAG buffer into big-endian u16, flipping bit-order */
 150 int arm_jtag_buf_to_be16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 151 {
 152         h_u16_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
 153         return ERROR_OK;
 154 }
 155
 156 /* read JTAG buffer into u8, flipping bit-order */
 157 int arm_jtag_buf_to_8_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 158 {
 159         u8 *dest = priv;
 160         *dest = flip_u32(le_to_h_u32(in_buf), 32) & 0xff;
 161         return ERROR_OK;
 162 }
 163
 164 /* not-flipping variants */
 165 /* read JTAG buffer into host-endian u32 */
 166 int arm_jtag_buf_to_u32(u8 *in_buf, void *priv, struct scan_field_s *field)
 167 {
 168         u32 *dest = priv;
 169         *dest = le_to_h_u32(in_buf);
 170         return ERROR_OK;
 171 }
 172
 173 /* read JTAG buffer into little-endian u32 */
 174 int arm_jtag_buf_to_le32(u8 *in_buf, void *priv, struct scan_field_s *field)
 175 {
 176         h_u32_to_le(((u8*)priv), le_to_h_u32(in_buf));
 177         return ERROR_OK;
 178 }
 179
 180 /* read JTAG buffer into little-endian u16 */
 181 int arm_jtag_buf_to_le16(u8 *in_buf, void *priv, struct scan_field_s *field)
 182 {
 183         h_u16_to_le(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
 184         return ERROR_OK;
 185 }
 186
 187 /* read JTAG buffer into big-endian u32 */
 188 int arm_jtag_buf_to_be32(u8 *in_buf, void *priv, struct scan_field_s *field)
 189 {
 190         h_u32_to_be(((u8*)priv), le_to_h_u32(in_buf));
 191         return ERROR_OK;
 192 }
 193
 194 /* read JTAG buffer into big-endian u16 */
 195 int arm_jtag_buf_to_be16(u8 *in_buf, void *priv, struct scan_field_s *field)
 196 {
 197         h_u16_to_be(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
 198         return ERROR_OK;
 199 }
 200
 201 /* read JTAG buffer into u8 */
 202 int arm_jtag_buf_to_8(u8 *in_buf, void *priv, struct scan_field_s *field)
 203 {
 204         u8 *dest = priv;
 205         *dest = le_to_h_u32(in_buf) & 0xff;
 206         return ERROR_OK;
 207 }