versaloon: remove bogus assignment
[openocd.git] / src / jtag / drivers / versaloon / usbtoxxx / usbtoswd.c
1 /***************************************************************************
2 * Copyright (C) 2009 - 2010 by Simon Qian <SimonQian@SimonQian.com> *
3 * *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
8 * *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
13 * *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
18 ***************************************************************************/
19
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include <stdlib.h>
25 #include <string.h>
26
27 #include "../versaloon_include.h"
28 #include "../versaloon.h"
29 #include "../versaloon_internal.h"
30 #include "usbtoxxx.h"
31 #include "usbtoxxx_internal.h"
32
33 RESULT usbtoswd_callback(void *p, uint8_t *src, uint8_t *processed)
34 {
35 struct versaloon_pending_t *pending = (struct versaloon_pending_t *)p;
36
37 if (pending->extra_data != NULL)
38 *((uint8_t *)pending->extra_data) = src[0];
39
40 return ERROR_OK;
41 }
42
43 RESULT usbtoswd_init(uint8_t interface_index)
44 {
45 return usbtoxxx_init_command(USB_TO_SWD, interface_index);
46 }
47
48 RESULT usbtoswd_fini(uint8_t interface_index)
49 {
50 return usbtoxxx_fini_command(USB_TO_SWD, interface_index);
51 }
52
53 RESULT usbtoswd_config(uint8_t interface_index, uint8_t trn, uint16_t retry,
54 uint16_t dly)
55 {
56 uint8_t cfg_buf[5];
57
58 #if PARAM_CHECK
59 if (interface_index > 7) {
60 LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
61 return ERROR_FAIL;
62 }
63 #endif
64
65 cfg_buf[0] = trn;
66 SET_LE_U16(&cfg_buf[1], retry);
67 SET_LE_U16(&cfg_buf[3], dly);
68
69 return usbtoxxx_conf_command(USB_TO_SWD, interface_index, cfg_buf, 5);
70 }
71
72 RESULT usbtoswd_seqout(uint8_t interface_index, uint8_t *data, uint16_t bitlen)
73 {
74 uint16_t bytelen = (bitlen + 7) >> 3;
75
76 #if PARAM_CHECK
77 if (interface_index > 7) {
78 LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
79 return ERROR_FAIL;
80 }
81 #endif
82
83 SET_LE_U16(&versaloon_cmd_buf[0], bitlen);
84 memcpy(versaloon_cmd_buf + 2, data, bytelen);
85
86 return usbtoxxx_out_command(USB_TO_SWD, interface_index,
87 versaloon_cmd_buf, bytelen + 2, 0);
88 }
89
90 RESULT usbtoswd_seqin(uint8_t interface_index, uint8_t *data, uint16_t bitlen)
91 {
92 uint16_t bytelen = (bitlen + 7) >> 3;
93 uint8_t buff[2];
94
95 #if PARAM_CHECK
96 if (interface_index > 7) {
97 LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
98 return ERROR_FAIL;
99 }
100 #endif
101
102 SET_LE_U16(&buff[0], bitlen);
103
104 return usbtoxxx_in_command(USB_TO_SWD, interface_index, buff, 2, bytelen,
105 data, 0, bytelen, 0);
106 }
107
108 RESULT usbtoswd_transact(uint8_t interface_index, uint8_t request,
109 uint32_t *data, uint8_t *ack)
110 {
111 uint8_t parity;
112 uint8_t buff[5];
113
114 #if PARAM_CHECK
115 if (interface_index > 7) {
116 LOG_BUG(ERRMSG_INVALID_INTERFACE_NUM, interface_index);
117 return ERROR_FAIL;
118 }
119 #endif
120
121 parity = (request >> 1) & 1;
122 parity += (request >> 2) & 1;
123 parity += (request >> 3) & 1;
124 parity += (request >> 4) & 1;
125 parity &= 1;
126 buff[0] = (request | 0x81 | (parity << 5)) & ~0x40;
127 if (data != NULL)
128 SET_LE_U32(&buff[1], *data);
129 else
130 memset(buff + 1, 0, 4);
131
132 versaloon_set_extra_data(ack);
133 versaloon_set_callback(usbtoswd_callback);
134 if (request & 0x04) {
135 /* read */
136 return usbtoxxx_inout_command(USB_TO_SWD, interface_index, buff, 5, 5,
137 (uint8_t *)data, 1, 4, 0);
138 } else {
139 /* write */
140 return usbtoxxx_inout_command(USB_TO_SWD, interface_index, buff, 5, 5,
141 NULL, 0, 0, 0);
142 }
143 }