1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2009 Zachary T Welch *
9 * zw@superlucidity.net *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
26 #ifndef JTAG_COMMANDS_H
27 #define JTAG_COMMANDS_H
32 * The inferred type of a scan_command_s structure, indicating whether
33 * the command has the host scan in from the device, the host scan out
34 * to the device, or both.
37 /// From device to host,
39 /// From host to device,
46 * The scan_command provide a means of encapsulating a set of scan_field_s
47 * structures that should be scanned in/out to the device.
49 typedef struct scan_command_s
51 /// instruction/not data scan
53 /// number of fields in *fields array
55 /// pointer to an array of data scan fields
57 /// state in which JTAG commands should finish
58 tap_state_t end_state
;
61 typedef struct statemove_command_s
63 /// state in which JTAG commands should finish
64 tap_state_t end_state
;
65 } statemove_command_t
;
67 typedef struct pathmove_command_s
69 /// number of states in *path
71 /// states that have to be passed
75 typedef struct runtest_command_s
77 /// number of cycles to spend in Run-Test/Idle state
79 /// state in which JTAG commands should finish
80 tap_state_t end_state
;
84 typedef struct stableclocks_command_s
86 /// number of clock cycles that should be sent
88 } stableclocks_command_t
;
91 typedef struct reset_command_s
93 /// Set TRST output: 0 = deassert, 1 = assert, -1 = no change
95 /// Set SRST output: 0 = deassert, 1 = assert, -1 = no change
99 typedef struct end_state_command_s
101 /// state in which JTAG commands should finish
102 tap_state_t end_state
;
103 } end_state_command_t
;
105 typedef struct sleep_command_s
107 /// number of microseconds to sleep
112 * Defines a container type that hold a pointer to a JTAG command
113 * structure of any defined type.
115 typedef union jtag_command_container_u
117 scan_command_t
* scan
;
118 statemove_command_t
* statemove
;
119 pathmove_command_t
* pathmove
;
120 runtest_command_t
* runtest
;
121 stableclocks_command_t
* stableclocks
;
122 reset_command_t
* reset
;
123 end_state_command_t
* end_state
;
124 sleep_command_t
* sleep
;
125 } jtag_command_container_t
;
128 * The type of the @c jtag_command_container_u contained by a
129 * @c jtag_command_s structure.
131 enum jtag_command_type
{
138 JTAG_STABLECLOCKS
= 8
141 typedef struct jtag_command_s
143 jtag_command_container_t cmd
;
144 enum jtag_command_type type
;
145 struct jtag_command_s
* next
;
148 /// The current queue of jtag_command_s structures.
149 extern jtag_command_t
* jtag_command_queue
;
151 void* cmd_queue_alloc(size_t size
);
152 void cmd_queue_free(void);
154 void jtag_queue_command(jtag_command_t
*cmd
);
155 void jtag_command_queue_reset(void);
157 enum scan_type
jtag_scan_type(const scan_command_t
* cmd
);
158 int jtag_scan_size(const scan_command_t
* cmd
);
159 int jtag_read_buffer(uint8_t* buffer
, const scan_command_t
* cmd
);
160 int jtag_build_buffer(const scan_command_t
* cmd
, uint8_t** buffer
);
162 #endif // JTAG_COMMANDS_H
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