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 #include "config.h"
  21
  22 #include "arm_jtag.h"
  23
  24 #include "binarybuffer.h"
  25 #include "log.h"
  26 #include "jtag.h"
  27
  28 #include <stdlib.h>
  29
  30 int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr)
  31 {
  32         jtag_device_t *device = jtag_get_device(jtag_info->chain_pos);
  33
  34         if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
  35         {
  36                 scan_field_t field;
  37
  38                 field.device = jtag_info->chain_pos;
  39                 field.num_bits = device->ir_length;
  40                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  41                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  42                 field.out_mask = NULL;
  43                 field.in_value = NULL;
  44                 field.in_check_value = NULL;
  45                 field.in_check_mask = NULL;
  46                 field.in_handler = NULL;
  47                 field.in_handler_priv = NULL;
  48
  49                 jtag_add_ir_scan(1, &field, -1);
  50
  51                 free(field.out_value);
  52         }
  53
  54         return ERROR_OK;
  55 }
  56
  57 int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
  58 {
  59         if(jtag_info->cur_scan_chain != new_scan_chain)
  60         {
  61                 scan_field_t field;
  62
  63                 field.device = jtag_info->chain_pos;
  64                 field.num_bits = jtag_info->scann_size;
  65                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  66                 buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain);
  67                 field.out_mask = NULL;
  68                 //field.in_value = &scan_n_capture;
  69                 field.in_value = NULL;
  70                 field.in_check_value = NULL;
  71                 field.in_check_mask = NULL;
  72                 field.in_handler = NULL;
  73                 field.in_handler_priv = NULL;
  74
  75                 arm_jtag_set_instr(jtag_info, jtag_info->scann_instr);
  76                 jtag_add_dr_scan(1, &field, -1);
  77
  78                 jtag_info->cur_scan_chain = new_scan_chain;
  79
  80                 free(field.out_value);
  81         }
  82
  83         return ERROR_OK;
  84 }
  85
  86 int arm_jtag_reset_callback(enum jtag_event event, void *priv)
  87 {
  88         arm_jtag_t *jtag_info = priv;
  89
  90         if (event == JTAG_TRST_ASSERTED)
  91         {
  92                 jtag_info->cur_scan_chain = 0;
  93         }
  94
  95         return ERROR_OK;
  96 }
  97
  98 int arm_jtag_setup_connection(arm_jtag_t *jtag_info)
  99 {
 100         jtag_info->scann_instr = 0x2;
 101         jtag_info->cur_scan_chain = 0;
 102         jtag_info->intest_instr = 0xc;
 103
 104         jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
 105
 106         return ERROR_OK;
 107 }
 108
 109 int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv)
 110 {
 111         u32 *dest = priv;
 112
 113         *dest = flip_u32(buf_get_u32(in_buf, 0, 32), 32);
 114
 115         return ERROR_OK;
 116 }