debug: Add pr_dump() to print memory dump

Add the method pr_dump to dump greybus operations.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>

debug.c

@@ -18,9 +18,28 @@
 
 #include <debug.h>
 
-int log_level = 0;
+int log_level = LL_VERBOSE;
 
 void set_log_level(int ll)
 {
 	log_level = ll;
 }
+
+void _pr_dump(const char *fn, uint8_t *data, size_t len)
+{
+	int j;
+	int i = 0;
+
+	if (log_level < LL_VERBOSE)
+		return;
+
+	printf("%s:\n", fn);
+	while (i < len) {
+		for (j = 0; j < LINE_COUNT; i++, j++) {
+			if (i >= len)
+				break;
+			printf("%02x ", data[i]);
+		}
+		printf("\n");
+	}
+}

debug.h

@@ -20,6 +20,7 @@
 #define _DEBUG_H_
 
 #include <stdio.h>
+#include <stdint.h>
 
 enum log_level {
 	LL_ERROR = 0,
@@ -29,6 +30,8 @@ enum log_level {
 	LL_VERBOSE
 };
 
+#define LINE_COUNT	16
+
 #define ll_print(ll, format, ...)			\
 	do {						\
 		if (log_level >= ll)			\
@@ -47,6 +50,13 @@ enum log_level {
 #define pr_dbg(format, ...) \
 	ll_print(LL_DEBUG, format, ##__VA_ARGS__)
 
+void _pr_dump(const char *sfn, uint8_t *data, size_t len);
+
+#define pr_dump(data, len)					\
+	do {							\
+		_pr_dump(__func__, (uint8_t *)(data), len);	\
+	} while(0)
+
 extern int log_level;
 
 void set_log_level(int ll);