1 files changed, 114 insertions, 0 deletions
diff --git a/nandwrite/jtag.c b/nandwrite/jtag.c
new file mode 100644
index 0000000..e91d1e8
--- /dev/null
+++ b/nandwrite/jtag.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the 
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <boot/boot.h>
+
+#define STATUS_NOMSG 0
+#define STATUS_OKAY  1
+#define STATUS_FAIL  2
+#define STATUS_PRINT 3
+
+void jtag_hook();
+
+volatile unsigned _jtag_cmd = 0;
+volatile unsigned _jtag_msg = 0;
+unsigned char _jtag_cmd_buffer[128];
+unsigned char _jtag_msg_buffer[128];
+
+volatile unsigned _jtag_arg0 = 0;
+volatile unsigned _jtag_arg1 = 0;
+volatile unsigned _jtag_arg2 = 0;
+
+static void jtag_msg(unsigned status, const char *msg)
+{
+    unsigned char *out = _jtag_msg_buffer;
+    while((*out++ = *msg++) != 0) ;
+    _jtag_msg = status;
+    do {
+        jtag_hook();
+    } while(_jtag_msg != 0);
+}
+
+void jtag_okay(const char *msg)
+{
+    if(msg == 0) msg = "OKAY";
+    jtag_msg(STATUS_OKAY, msg);
+}
+
+void jtag_fail(const char *msg)
+{
+    if(msg == 0) msg = "FAIL";
+    jtag_msg(STATUS_FAIL, msg);
+}
+
+int jtag_cmd_pending()
+{
+    jtag_hook();
+    return (int) _jtag_cmd;
+}
+
+void jtag_cmd_loop(void (*do_cmd)(const char *, unsigned, unsigned, unsigned))
+{
+    unsigned n;
+    for(;;) {
+        if(jtag_cmd_pending()){
+            do_cmd((const char*) _jtag_cmd_buffer, _jtag_arg0, _jtag_arg1, _jtag_arg2);
+            for(n = 0; n < 256; n++) _jtag_cmd_buffer[n] = 0;
+            _jtag_arg0 = 0;
+            _jtag_arg1 = 0;
+            _jtag_arg2 = 0;
+            _jtag_cmd = 0;
+        }
+    }
+}
+
+static char jtag_putc_buffer[128];
+static unsigned jtag_putc_count = 0;
+
+static void jtag_push_buffer(void)
+{
+    jtag_putc_buffer[jtag_putc_count] = 0;
+    jtag_putc_count = 0;
+    jtag_msg(STATUS_PRINT, jtag_putc_buffer);
+}
+    
+void jtag_dputc(unsigned c)
+{
+    if((c < 32) || (c > 127)) {
+        if(c == '\n') {
+            jtag_push_buffer();
+        }
+        return;
+    }
+        
+    jtag_putc_buffer[jtag_putc_count++] = c;
+    if(jtag_putc_count == 127) {
+        jtag_push_buffer();
+    }
+}
+