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   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 int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr)
  33 {
  34         jtag_device_t *device = jtag_get_device(jtag_info->chain_pos);
  35
  36         if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
  37         {
  38                 scan_field_t field;
  39
  40                 field.device = jtag_info->chain_pos;
  41                 field.num_bits = device->ir_length;
  42                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  43                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  44                 field.out_mask = NULL;
  45                 field.in_value = NULL;
  46                 field.in_check_value = NULL;
  47                 field.in_check_mask = NULL;
  48                 field.in_handler = NULL;
  49                 field.in_handler_priv = NULL;
  50
  51                 jtag_add_ir_scan(1, &field, -1);
  52
  53                 free(field.out_value);
  54         }
  55
  56         return ERROR_OK;
  57 }
  58
  59 int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
  60 {
  61         if(jtag_info->cur_scan_chain != new_scan_chain)
  62         {
  63                 scan_field_t field;
  64
  65                 field.device = jtag_info->chain_pos;
  66                 field.num_bits = jtag_info->scann_size;
  67                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  68                 buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
  69                 field.out_mask = NULL;
  70                 //field.in_value = &scan_n_capture;
  71                 field.in_value = NULL;
  72                 field.in_check_value = NULL;
  73                 field.in_check_mask = NULL;
  74                 field.in_handler = NULL;
  75                 field.in_handler_priv = NULL;
  76
  77                 arm_jtag_set_instr(jtag_info, jtag_info->scann_instr);
  78                 jtag_add_dr_scan(1, &field, -1);
  79
  80                 jtag_info->cur_scan_chain = new_scan_chain;
  81
  82                 free(field.out_value);
  83         }
  84
  85         return ERROR_OK;
  86 }
  87
  88 int arm_jtag_reset_callback(enum jtag_event event, void *priv)
  89 {
  90         arm_jtag_t *jtag_info = priv;
  91
  92         if (event == JTAG_TRST_ASSERTED)
  93         {
  94                 jtag_info->cur_scan_chain = 0;
  95         }
  96
  97         return ERROR_OK;
  98 }
  99
 100 int arm_jtag_setup_connection(arm_jtag_t *jtag_info)
 101 {
 102         jtag_info->scann_instr = 0x2;
 103         jtag_info->cur_scan_chain = 0;
 104         jtag_info->intest_instr = 0xc;
 105
 106         jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
 107
 108         return ERROR_OK;
 109 }
 110
 111 int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv)
 112 {
 113         u32 *dest = priv;
 114
 115         *dest = flip_u32(buf_get_u32(in_buf, 0, 32), 32);
 116
 117         return ERROR_OK;
 118 }