1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
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. *
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. *
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 ***************************************************************************/
26 #include "binarybuffer.h"
33 #define _ARM_JTAG_SCAN_N_CHECK_
36 int arm_jtag_set_instr_error_handler(u8
*in_value
, void *priv
)
38 ERROR("setting the new JTAG instruction failed, debugging is likely to be broken");
43 int arm_jtag_set_instr(arm_jtag_t
*jtag_info
, u32 new_instr
, error_handler_t
*caller_error_handler
)
45 jtag_device_t
*device
= jtag_get_device(jtag_info
->chain_pos
);
47 if (buf_get_u32(device
->cur_instr
, 0, device
->ir_length
) != new_instr
)
51 field
.device
= jtag_info
->chain_pos
;
52 field
.num_bits
= device
->ir_length
;
53 field
.out_value
= calloc(CEIL(field
.num_bits
, 8), 1);
54 buf_set_u32(field
.out_value
, 0, field
.num_bits
, new_instr
);
55 field
.out_mask
= NULL
;
56 field
.in_value
= NULL
;
57 field
.in_check_value
= NULL
;
58 field
.in_check_mask
= NULL
;
59 field
.in_handler
= NULL
;
60 field
.in_handler_priv
= NULL
;
62 if (caller_error_handler
)
64 jtag_add_ir_scan(1, &field
, -1, caller_error_handler
);
68 error_handler_t error_handler
;
69 error_handler
.error_handler
= arm_jtag_set_instr_error_handler
;
70 error_handler
.error_handler_priv
= NULL
;
71 jtag_add_ir_scan(1, &field
, -1, &error_handler
);
75 free(field
.out_value
);
81 int arm_jtag_scann(arm_jtag_t
*jtag_info
, u32 new_scan_chain
)
83 if(jtag_info
->cur_scan_chain
!= new_scan_chain
)
85 #ifdef _ARM_JTAG_SCAN_N_CHECK_
86 u8 scan_n_check_value
= 0x10;
90 field
.device
= jtag_info
->chain_pos
;
91 field
.num_bits
= jtag_info
->scann_size
;
92 field
.out_value
= calloc(CEIL(field
.num_bits
, 8), 1);
93 buf_set_u32(field
.out_value
, 0, field
.num_bits
, new_scan_chain
);
94 field
.out_mask
= NULL
;
95 field
.in_value
= NULL
;
96 #ifdef _ARM_JTAG_SCAN_N_CHECK_
97 field
.in_check_value
= &scan_n_check_value
;
99 field
.in_check_value
= NULL
;
101 field
.in_check_mask
= NULL
;
102 field
.in_handler
= NULL
;
103 field
.in_handler_priv
= NULL
;
105 arm_jtag_set_instr(jtag_info
, jtag_info
->scann_instr
, NULL
);
106 jtag_add_dr_scan(1, &field
, -1, NULL
);
108 jtag_info
->cur_scan_chain
= new_scan_chain
;
110 free(field
.out_value
);
116 int arm_jtag_reset_callback(enum jtag_event event
, void *priv
)
118 arm_jtag_t
*jtag_info
= priv
;
120 if (event
== JTAG_TRST_ASSERTED
)
122 jtag_info
->cur_scan_chain
= 0;
128 int arm_jtag_setup_connection(arm_jtag_t
*jtag_info
)
130 jtag_info
->scann_instr
= 0x2;
131 jtag_info
->cur_scan_chain
= 0;
132 jtag_info
->intest_instr
= 0xc;
134 jtag_register_event_callback(arm_jtag_reset_callback
, jtag_info
);
139 /* read JTAG buffer into host-endian u32, flipping bit-order */
140 int arm_jtag_buf_to_u32_flip(u8
*in_buf
, void *priv
)
143 *dest
= flip_u32(le_to_h_u32(in_buf
), 32);
147 /* read JTAG buffer into little-endian u32, flipping bit-order */
148 int arm_jtag_buf_to_le32_flip(u8
*in_buf
, void *priv
)
150 h_u32_to_le(((u8
*)priv
), flip_u32(le_to_h_u32(in_buf
), 32));
154 /* read JTAG buffer into little-endian u16, flipping bit-order */
155 int arm_jtag_buf_to_le16_flip(u8
*in_buf
, void *priv
)
157 h_u16_to_le(((u8
*)priv
), flip_u32(le_to_h_u32(in_buf
), 32) & 0xffff);
161 /* read JTAG buffer into big-endian u32, flipping bit-order */
162 int arm_jtag_buf_to_be32_flip(u8
*in_buf
, void *priv
)
164 h_u32_to_be(((u8
*)priv
), flip_u32(le_to_h_u32(in_buf
), 32));
168 /* read JTAG buffer into big-endian u16, flipping bit-order */
169 int arm_jtag_buf_to_be16_flip(u8
*in_buf
, void *priv
)
171 h_u16_to_be(((u8
*)priv
), flip_u32(le_to_h_u32(in_buf
), 32) & 0xffff);
175 /* read JTAG buffer into u8, flipping bit-order */
176 int arm_jtag_buf_to_8_flip(u8
*in_buf
, void *priv
)
179 *dest
= flip_u32(le_to_h_u32(in_buf
), 32) & 0xff;
183 /* not-flipping variants */
184 /* read JTAG buffer into host-endian u32 */
185 int arm_jtag_buf_to_u32(u8
*in_buf
, void *priv
)
188 *dest
= le_to_h_u32(in_buf
);
192 /* read JTAG buffer into little-endian u32 */
193 int arm_jtag_buf_to_le32(u8
*in_buf
, void *priv
)
195 h_u32_to_le(((u8
*)priv
), le_to_h_u32(in_buf
));
199 /* read JTAG buffer into little-endian u16 */
200 int arm_jtag_buf_to_le16(u8
*in_buf
, void *priv
)
202 h_u16_to_le(((u8
*)priv
), le_to_h_u32(in_buf
) & 0xffff);
206 /* read JTAG buffer into big-endian u32 */
207 int arm_jtag_buf_to_be32(u8
*in_buf
, void *priv
)
209 h_u32_to_be(((u8
*)priv
), le_to_h_u32(in_buf
));
213 /* read JTAG buffer into big-endian u16 */
214 int arm_jtag_buf_to_be16(u8
*in_buf
, void *priv
)
216 h_u16_to_be(((u8
*)priv
), le_to_h_u32(in_buf
) & 0xffff);
220 /* read JTAG buffer into u8 */
221 int arm_jtag_buf_to_8(u8
*in_buf
, void *priv
)
224 *dest
= le_to_h_u32(in_buf
) & 0xff;
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