src/target/arm_jtag.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "arm_jtag.h"
  28
  29 #include "binarybuffer.h"
  30 #include "log.h"
  31 #include "jtag.h"
  32
  33 #include <stdlib.h>
  34
  35 #if 0
  36 #define _ARM_JTAG_SCAN_N_CHECK_
  37 #endif
  38
  39 int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr,  in_handler_t handler)
  40 {
  41         jtag_device_t *device = jtag_get_device(jtag_info->chain_pos);
  42
  43         if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr)
  44         {
  45                 scan_field_t field;
  46                 u8 t[4];
  47
  48                 field.device = jtag_info->chain_pos;
  49                 field.num_bits = device->ir_length;
  50                 field.out_value = t;
  51                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  52                 field.out_mask = NULL;
  53                 field.in_value = NULL;
  54                 field.in_check_value = NULL;
  55                 field.in_check_mask = NULL;
  56                 field.in_handler = handler;
  57                 field.in_handler_priv = NULL;
  58                 jtag_add_ir_scan(1, &field, -1);
  59         }
  60
  61         return ERROR_OK;
  62 }
  63
  64 int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain)
  65 {
  66         int retval = ERROR_OK;
  67         if(jtag_info->cur_scan_chain != new_scan_chain)
  68         {
  69                 u32 values[1];
  70                 int num_bits[1];
  71
  72                 values[0]=new_scan_chain;
  73                 num_bits[0]=jtag_info->scann_size;
  74
  75                 if((retval = arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL)) != ERROR_OK)
  76                 {
  77                         return retval;
  78                 }
  79
  80                 jtag_add_dr_out(jtag_info->chain_pos,
  81                                 1,
  82                                 num_bits,
  83                                 values,
  84                                 -1);
  85
  86                 jtag_info->cur_scan_chain = new_scan_chain;
  87         }
  88
  89         return retval;
  90 }
  91
  92 int arm_jtag_reset_callback(enum jtag_event event, void *priv)
  93 {
  94         arm_jtag_t *jtag_info = priv;
  95
  96         if (event == JTAG_TRST_ASSERTED)
  97         {
  98                 jtag_info->cur_scan_chain = 0;
  99         }
 100
 101         return ERROR_OK;
 102 }
 103
 104 int arm_jtag_setup_connection(arm_jtag_t *jtag_info)
 105 {
 106         jtag_info->scann_instr = 0x2;
 107         jtag_info->cur_scan_chain = 0;
 108         jtag_info->intest_instr = 0xc;
 109
 110         return jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
 111 }
 112
 113 /* read JTAG buffer into host-endian u32, flipping bit-order */
 114 int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 115 {
 116         u32 *dest = priv;
 117         *dest = flip_u32(le_to_h_u32(in_buf), 32);
 118         return ERROR_OK;
 119 }
 120
 121 /* read JTAG buffer into little-endian u32, flipping bit-order */
 122 int arm_jtag_buf_to_le32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 123 {
 124         h_u32_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
 125         return ERROR_OK;
 126 }
 127
 128 /* read JTAG buffer into little-endian u16, flipping bit-order */
 129 int arm_jtag_buf_to_le16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 130 {
 131         h_u16_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
 132         return ERROR_OK;
 133 }
 134
 135 /* read JTAG buffer into big-endian u32, flipping bit-order */
 136 int arm_jtag_buf_to_be32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 137 {
 138         h_u32_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
 139         return ERROR_OK;
 140 }
 141
 142 /* read JTAG buffer into big-endian u16, flipping bit-order */
 143 int arm_jtag_buf_to_be16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 144 {
 145         h_u16_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
 146         return ERROR_OK;
 147 }
 148
 149 /* read JTAG buffer into u8, flipping bit-order */
 150 int arm_jtag_buf_to_8_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 151 {
 152         u8 *dest = priv;
 153         *dest = flip_u32(le_to_h_u32(in_buf), 32) & 0xff;
 154         return ERROR_OK;
 155 }
 156
 157 /* not-flipping variants */
 158 /* read JTAG buffer into host-endian u32 */
 159 int arm_jtag_buf_to_u32(u8 *in_buf, void *priv, struct scan_field_s *field)
 160 {
 161         u32 *dest = priv;
 162         *dest = le_to_h_u32(in_buf);
 163         return ERROR_OK;
 164 }
 165
 166 /* read JTAG buffer into little-endian u32 */
 167 int arm_jtag_buf_to_le32(u8 *in_buf, void *priv, struct scan_field_s *field)
 168 {
 169         h_u32_to_le(((u8*)priv), le_to_h_u32(in_buf));
 170         return ERROR_OK;
 171 }
 172
 173 /* read JTAG buffer into little-endian u16 */
 174 int arm_jtag_buf_to_le16(u8 *in_buf, void *priv, struct scan_field_s *field)
 175 {
 176         h_u16_to_le(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
 177         return ERROR_OK;
 178 }
 179
 180 /* read JTAG buffer into big-endian u32 */
 181 int arm_jtag_buf_to_be32(u8 *in_buf, void *priv, struct scan_field_s *field)
 182 {
 183         h_u32_to_be(((u8*)priv), le_to_h_u32(in_buf));
 184         return ERROR_OK;
 185 }
 186
 187 /* read JTAG buffer into big-endian u16 */
 188 int arm_jtag_buf_to_be16(u8 *in_buf, void *priv, struct scan_field_s *field)
 189 {
 190         h_u16_to_be(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
 191         return ERROR_OK;
 192 }
 193
 194 /* read JTAG buffer into u8 */
 195 int arm_jtag_buf_to_8(u8 *in_buf, void *priv, struct scan_field_s *field)
 196 {
 197         u8 *dest = priv;
 198         *dest = le_to_h_u32(in_buf) & 0xff;
 199         return ERROR_OK;
 200 }