1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <boot/boot.h>
30
31 #define STATUS_NOMSG 0
32 #define STATUS_OKAY 1
33 #define STATUS_FAIL 2
34 #define STATUS_PRINT 3
35
36 void jtag_hook();
37
38 volatile unsigned _jtag_cmd = 0;
39 volatile unsigned _jtag_msg = 0;
40 unsigned char _jtag_cmd_buffer[128];
41 unsigned char _jtag_msg_buffer[128];
42
43 volatile unsigned _jtag_arg0 = 0;
44 volatile unsigned _jtag_arg1 = 0;
45 volatile unsigned _jtag_arg2 = 0;
46
jtag_msg(unsigned status,const char * msg)47 static void jtag_msg(unsigned status, const char *msg)
48 {
49 unsigned char *out = _jtag_msg_buffer;
50 while((*out++ = *msg++) != 0) ;
51 _jtag_msg = status;
52 do {
53 jtag_hook();
54 } while(_jtag_msg != 0);
55 }
56
jtag_okay(const char * msg)57 void jtag_okay(const char *msg)
58 {
59 if(msg == 0) msg = "OKAY";
60 jtag_msg(STATUS_OKAY, msg);
61 }
62
jtag_fail(const char * msg)63 void jtag_fail(const char *msg)
64 {
65 if(msg == 0) msg = "FAIL";
66 jtag_msg(STATUS_FAIL, msg);
67 }
68
jtag_cmd_pending()69 int jtag_cmd_pending()
70 {
71 jtag_hook();
72 return (int) _jtag_cmd;
73 }
74
jtag_cmd_loop(void (* do_cmd)(const char *,unsigned,unsigned,unsigned))75 void jtag_cmd_loop(void (*do_cmd)(const char *, unsigned, unsigned, unsigned))
76 {
77 unsigned n;
78 for(;;) {
79 if(jtag_cmd_pending()){
80 do_cmd((const char*) _jtag_cmd_buffer, _jtag_arg0, _jtag_arg1, _jtag_arg2);
81 for(n = 0; n < 256; n++) _jtag_cmd_buffer[n] = 0;
82 _jtag_arg0 = 0;
83 _jtag_arg1 = 0;
84 _jtag_arg2 = 0;
85 _jtag_cmd = 0;
86 }
87 }
88 }
89
90 static char jtag_putc_buffer[128];
91 static unsigned jtag_putc_count = 0;
92
jtag_push_buffer(void)93 static void jtag_push_buffer(void)
94 {
95 jtag_putc_buffer[jtag_putc_count] = 0;
96 jtag_putc_count = 0;
97 jtag_msg(STATUS_PRINT, jtag_putc_buffer);
98 }
99
jtag_dputc(unsigned c)100 void jtag_dputc(unsigned c)
101 {
102 if((c < 32) || (c > 127)) {
103 if(c == '\n') {
104 jtag_push_buffer();
105 }
106 return;
107 }
108
109 jtag_putc_buffer[jtag_putc_count++] = c;
110 if(jtag_putc_count == 127) {
111 jtag_push_buffer();
112 }
113 }
114
115