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         if(jtag_info->cur_scan_chain != new_scan_chain)
  67         {
  68                 u32 values[1];
  69                 int num_bits[1];
  70
  71                 values[0]=new_scan_chain;
  72                 num_bits[0]=jtag_info->scann_size;
  73
  74                 arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL);
  75                 jtag_add_dr_out(jtag_info->chain_pos,
  76                                 1,
  77                                 num_bits,
  78                                 values,
  79                                 -1);
  80
  81                 jtag_info->cur_scan_chain = new_scan_chain;
  82         }
  83
  84         return ERROR_OK;
  85 }
  86
  87 int arm_jtag_reset_callback(enum jtag_event event, void *priv)
  88 {
  89         arm_jtag_t *jtag_info = priv;
  90
  91         if (event == JTAG_TRST_ASSERTED)
  92         {
  93                 jtag_info->cur_scan_chain = 0;
  94         }
  95
  96         return ERROR_OK;
  97 }
  98
  99 int arm_jtag_setup_connection(arm_jtag_t *jtag_info)
 100 {
 101         jtag_info->scann_instr = 0x2;
 102         jtag_info->cur_scan_chain = 0;
 103         jtag_info->intest_instr = 0xc;
 104
 105         jtag_register_event_callback(arm_jtag_reset_callback, jtag_info);
 106
 107         return ERROR_OK;
 108 }
 109
 110 /* read JTAG buffer into host-endian u32, flipping bit-order */
 111 int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 112 {
 113         u32 *dest = priv;
 114         *dest = flip_u32(le_to_h_u32(in_buf), 32);
 115         return ERROR_OK;
 116 }
 117
 118 /* read JTAG buffer into little-endian u32, flipping bit-order */
 119 int arm_jtag_buf_to_le32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 120 {
 121         h_u32_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
 122         return ERROR_OK;
 123 }
 124
 125 /* read JTAG buffer into little-endian u16, flipping bit-order */
 126 int arm_jtag_buf_to_le16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 127 {
 128         h_u16_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
 129         return ERROR_OK;
 130 }
 131
 132 /* read JTAG buffer into big-endian u32, flipping bit-order */
 133 int arm_jtag_buf_to_be32_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 134 {
 135         h_u32_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32));
 136         return ERROR_OK;
 137 }
 138
 139 /* read JTAG buffer into big-endian u16, flipping bit-order */
 140 int arm_jtag_buf_to_be16_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 141 {
 142         h_u16_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff);
 143         return ERROR_OK;
 144 }
 145
 146 /* read JTAG buffer into u8, flipping bit-order */
 147 int arm_jtag_buf_to_8_flip(u8 *in_buf, void *priv, struct scan_field_s *field)
 148 {
 149         u8 *dest = priv;
 150         *dest = flip_u32(le_to_h_u32(in_buf), 32) & 0xff;
 151         return ERROR_OK;
 152 }
 153
 154 /* not-flipping variants */
 155 /* read JTAG buffer into host-endian u32 */
 156 int arm_jtag_buf_to_u32(u8 *in_buf, void *priv, struct scan_field_s *field)
 157 {
 158         u32 *dest = priv;
 159         *dest = le_to_h_u32(in_buf);
 160         return ERROR_OK;
 161 }
 162
 163 /* read JTAG buffer into little-endian u32 */
 164 int arm_jtag_buf_to_le32(u8 *in_buf, void *priv, struct scan_field_s *field)
 165 {
 166         h_u32_to_le(((u8*)priv), le_to_h_u32(in_buf));
 167         return ERROR_OK;
 168 }
 169
 170 /* read JTAG buffer into little-endian u16 */
 171 int arm_jtag_buf_to_le16(u8 *in_buf, void *priv, struct scan_field_s *field)
 172 {
 173         h_u16_to_le(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
 174         return ERROR_OK;
 175 }
 176
 177 /* read JTAG buffer into big-endian u32 */
 178 int arm_jtag_buf_to_be32(u8 *in_buf, void *priv, struct scan_field_s *field)
 179 {
 180         h_u32_to_be(((u8*)priv), le_to_h_u32(in_buf));
 181         return ERROR_OK;
 182 }
 183
 184 /* read JTAG buffer into big-endian u16 */
 185 int arm_jtag_buf_to_be16(u8 *in_buf, void *priv, struct scan_field_s *field)
 186 {
 187         h_u16_to_be(((u8*)priv), le_to_h_u32(in_buf) & 0xffff);
 188         return ERROR_OK;
 189 }
 190
 191 /* read JTAG buffer into u8 */
 192 int arm_jtag_buf_to_8(u8 *in_buf, void *priv, struct scan_field_s *field)
 193 {
 194         u8 *dest = priv;
 195         *dest = le_to_h_u32(in_buf) & 0xff;
 196         return ERROR_OK;
 197 }