/*************************************************************************** * Copyright (C) 2005 by Dominic Rath * * Dominic.Rath@gmx.de * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License * * along with this program; if not, write to the * * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "arm_jtag.h" #include "binarybuffer.h" #include "log.h" #include "jtag.h" #include #if 0 #define _ARM_JTAG_SCAN_N_CHECK_ #endif int arm_jtag_set_instr_error_handler(u8 *in_value, void *priv) { ERROR("setting the new JTAG instruction failed, debugging is likely to be broken"); return ERROR_OK; } int arm_jtag_set_instr(arm_jtag_t *jtag_info, u32 new_instr, error_handler_t *caller_error_handler) { jtag_device_t *device = jtag_get_device(jtag_info->chain_pos); if (buf_get_u32(device->cur_instr, 0, device->ir_length) != new_instr) { scan_field_t field; field.device = jtag_info->chain_pos; field.num_bits = device->ir_length; field.out_value = calloc(CEIL(field.num_bits, 8), 1); buf_set_u32(field.out_value, 0, field.num_bits, new_instr); field.out_mask = NULL; field.in_value = NULL; field.in_check_value = NULL; field.in_check_mask = NULL; field.in_handler = NULL; field.in_handler_priv = NULL; if (caller_error_handler) { jtag_add_ir_scan(1, &field, -1, caller_error_handler); } else { error_handler_t error_handler; error_handler.error_handler = arm_jtag_set_instr_error_handler; error_handler.error_handler_priv = NULL; jtag_add_ir_scan(1, &field, -1, &error_handler); } free(field.out_value); } return ERROR_OK; } int arm_jtag_scann(arm_jtag_t *jtag_info, u32 new_scan_chain) { if(jtag_info->cur_scan_chain != new_scan_chain) { #ifdef _ARM_JTAG_SCAN_N_CHECK_ u8 scan_n_check_value = 0x10; #endif scan_field_t field; field.device = jtag_info->chain_pos; field.num_bits = jtag_info->scann_size; field.out_value = calloc(CEIL(field.num_bits, 8), 1); buf_set_u32(field.out_value, 0, field.num_bits, new_scan_chain); field.out_mask = NULL; field.in_value = NULL; #ifdef _ARM_JTAG_SCAN_N_CHECK_ field.in_check_value = &scan_n_check_value; #else field.in_check_value = NULL; #endif field.in_check_mask = NULL; field.in_handler = NULL; field.in_handler_priv = NULL; arm_jtag_set_instr(jtag_info, jtag_info->scann_instr, NULL); jtag_add_dr_scan(1, &field, -1, NULL); jtag_info->cur_scan_chain = new_scan_chain; free(field.out_value); } return ERROR_OK; } int arm_jtag_reset_callback(enum jtag_event event, void *priv) { arm_jtag_t *jtag_info = priv; if (event == JTAG_TRST_ASSERTED) { jtag_info->cur_scan_chain = 0; } return ERROR_OK; } int arm_jtag_setup_connection(arm_jtag_t *jtag_info) { jtag_info->scann_instr = 0x2; jtag_info->cur_scan_chain = 0; jtag_info->intest_instr = 0xc; jtag_register_event_callback(arm_jtag_reset_callback, jtag_info); return ERROR_OK; } /* read JTAG buffer into host-endian u32, flipping bit-order */ int arm_jtag_buf_to_u32_flip(u8 *in_buf, void *priv) { u32 *dest = priv; *dest = flip_u32(le_to_h_u32(in_buf), 32); return ERROR_OK; } /* read JTAG buffer into little-endian u32, flipping bit-order */ int arm_jtag_buf_to_le32_flip(u8 *in_buf, void *priv) { h_u32_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32)); return ERROR_OK; } /* read JTAG buffer into little-endian u16, flipping bit-order */ int arm_jtag_buf_to_le16_flip(u8 *in_buf, void *priv) { h_u16_to_le(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff); return ERROR_OK; } /* read JTAG buffer into big-endian u32, flipping bit-order */ int arm_jtag_buf_to_be32_flip(u8 *in_buf, void *priv) { h_u32_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32)); return ERROR_OK; } /* read JTAG buffer into big-endian u16, flipping bit-order */ int arm_jtag_buf_to_be16_flip(u8 *in_buf, void *priv) { h_u16_to_be(((u8*)priv), flip_u32(le_to_h_u32(in_buf), 32) & 0xffff); return ERROR_OK; } /* read JTAG buffer into u8, flipping bit-order */ int arm_jtag_buf_to_8_flip(u8 *in_buf, void *priv) { u8 *dest = priv; *dest = flip_u32(le_to_h_u32(in_buf), 32) & 0xff; return ERROR_OK; } /* not-flipping variants */ /* read JTAG buffer into host-endian u32 */ int arm_jtag_buf_to_u32(u8 *in_buf, void *priv) { u32 *dest = priv; *dest = le_to_h_u32(in_buf); return ERROR_OK; } /* read JTAG buffer into little-endian u32 */ int arm_jtag_buf_to_le32(u8 *in_buf, void *priv) { h_u32_to_le(((u8*)priv), le_to_h_u32(in_buf)); return ERROR_OK; } /* read JTAG buffer into little-endian u16 */ int arm_jtag_buf_to_le16(u8 *in_buf, void *priv) { h_u16_to_le(((u8*)priv), le_to_h_u32(in_buf) & 0xffff); return ERROR_OK; } /* read JTAG buffer into big-endian u32 */ int arm_jtag_buf_to_be32(u8 *in_buf, void *priv) { h_u32_to_be(((u8*)priv), le_to_h_u32(in_buf)); return ERROR_OK; } /* read JTAG buffer into big-endian u16 */ int arm_jtag_buf_to_be16(u8 *in_buf, void *priv) { h_u16_to_be(((u8*)priv), le_to_h_u32(in_buf) & 0xffff); return ERROR_OK; } /* read JTAG buffer into u8 */ int arm_jtag_buf_to_8(u8 *in_buf, void *priv) { u8 *dest = priv; *dest = le_to_h_u32(in_buf) & 0xff; return ERROR_OK; }