1 /***************************************************************************
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2 * Copyright (C) 2005 by Dominic Rath *
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3 * Dominic.Rath@gmx.de *
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5 * This program is free software; you can redistribute it and/or modify *
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6 * it under the terms of the GNU General Public License as published by *
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7 * the Free Software Foundation; either version 2 of the License, or *
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8 * (at your option) any later version. *
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10 * This program is distributed in the hope that it will be useful, *
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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13 * GNU General Public License for more details. *
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15 * You should have received a copy of the GNU General Public License *
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16 * along with this program; if not, write to the *
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17 * Free Software Foundation, Inc., *
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18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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19 ***************************************************************************/
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20 #ifdef HAVE_CONFIG_H
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24 #include "arm_jtag.h"
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26 #include "binarybuffer.h"
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33 #define _ARM_JTAG_SCAN_N_CHECK_
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36 int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr, in_handler_t handler)
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38 jtag_device_t *device = jtag_get_device(jtag_info->chain_pos);
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40 if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
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44 field.device = jtag_info->chain_pos;
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45 field.num_bits = device->ir_length;
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46 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
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47 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
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48 field.out_mask = NULL;
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49 field.in_value = NULL;
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50 field.in_check_value = NULL;
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51 field.in_check_mask = NULL;
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52 field.in_handler = handler;
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53 field.in_handler_priv = NULL;
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54 jtag_add_ir_scan(1, &field, -1);
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57 free(field.out_value);
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63 int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
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65 if(jtag_info->cur_scan_chain != new_scan_chain)
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67 #ifdef _ARM_JTAG_SCAN_N_CHECK_
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68 u8 scan_n_check_value = 1 << (jtag_info->scann_size - 1);
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72 field.device = jtag_info->chain_pos;
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73 field.num_bits = jtag_info->scann_size;
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74 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
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75 buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
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76 field.out_mask = NULL;
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77 field.in_value = NULL;
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78 #ifdef _ARM_JTAG_SCAN_N_CHECK_
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79 jtag_set_check_value(&field, &scan_n_check_value, NULL, NULL, NULL);
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81 field.in_handler = NULL;
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82 field.in_handler_priv = NULL;
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86 arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL);
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87 jtag_add_dr_scan(1, &field, -1);
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89 jtag_info->cur_scan_chain = new_scan_chain;
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91 free(field.out_value);
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97 int arm_jtag_reset_callback(enum jtag_event event, void *priv)
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99 arm_jtag_t *jtag_info = priv;
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101 if (event == JTAG_TRST_ASSERTED)
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103 jtag_info->cur_scan_chain = 0;
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109 int arm_jtag_setup_connection(arm_jtag_t *jtag_info)
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111 jtag_info->scann_instr = 0x2;
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112 jtag_info->cur_scan_chain = 0;
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113 jtag_info->intest_instr = 0xc;
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115 jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
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120 /* read JTAG buffer into host-endian u32, flipping bit-order */
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121 int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
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124 *dest = flip_u32(le_to_h_u32(in_buf), 32);
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128 /* read JTAG buffer into little-endian u32, flipping bit-order */
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129 int arm_jtag_buf_to_le32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
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131 h_u32_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
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135 /* read JTAG buffer into little-endian u16, flipping bit-order */
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136 int arm_jtag_buf_to_le16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
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138 h_u16_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
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142 /* read JTAG buffer into big-endian u32, flipping bit-order */
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143 int arm_jtag_buf_to_be32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
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145 h_u32_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
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149 /* read JTAG buffer into big-endian u16, flipping bit-order */
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150 int arm_jtag_buf_to_be16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
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152 h_u16_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
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156 /* read JTAG buffer into u8, flipping bit-order */
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157 int arm_jtag_buf_to_8_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
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160 *dest = flip_u32(le_to_h_u32(in_buf), 32) & 0xff;
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164 /* not-flipping variants */
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165 /* read JTAG buffer into host-endian u32 */
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166 int arm_jtag_buf_to_u32(u8 *in_buf, void *priv, struct scan_field_s *field)
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169 *dest = le_to_h_u32(in_buf);
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173 /* read JTAG buffer into little-endian u32 */
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174 int arm_jtag_buf_to_le32(u8 *in_buf, void *priv, struct scan_field_s *field)
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176 h_u32_to_le(((u8*)priv), le_to_h_u32(in_buf));
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180 /* read JTAG buffer into little-endian u16 */
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181 int arm_jtag_buf_to_le16(u8 *in_buf, void *priv, struct scan_field_s *field)
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183 h_u16_to_le(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
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187 /* read JTAG buffer into big-endian u32 */
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188 int arm_jtag_buf_to_be32(u8 *in_buf, void *priv, struct scan_field_s *field)
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190 h_u32_to_be(((u8*)priv), le_to_h_u32(in_buf));
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194 /* read JTAG buffer into big-endian u16 */
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195 int arm_jtag_buf_to_be16(u8 *in_buf, void *priv, struct scan_field_s *field)
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197 h_u16_to_be(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
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201 /* read JTAG buffer into u8 */
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202 int arm_jtag_buf_to_8(u8 *in_buf, void *priv, struct scan_field_s *field)
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205 *dest = le_to_h_u32(in_buf) & 0xff;
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