diff --git a/writeprotect.h b/writeprotect.h
index 8510226..2f473f7 100644
--- a/writeprotect.h
+++ b/writeprotect.h
@@ -18,6 +18,42 @@
 #ifndef __WRITEPROTECT_H__
 #define __WRITEPROTECT_H__ 1
 
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
 #define MAX_BP_BITS 4
 
+/*
+ * Description of a chip's write protection configuration.
+ *
+ * It allows most WP code to store and manipulate a chip's configuration
+ * without knowing the exact layout of bits in the chip's status registers.
+ */
+struct wp_bits  {
+	/* Status register protection bit (SRP) */
+	bool srp_bit_present;
+	uint8_t srp;
+
+	/* Status register lock bit (SRL) */
+	bool srl_bit_present;
+	uint8_t srl;
+
+	/* Complement bit (CMP) */
+	bool cmp_bit_present;
+	uint8_t cmp;
+
+	/* Sector/block protection bit (SEC) */
+	bool sec_bit_present;
+	uint8_t sec;
+
+	/* Top/bottom protection bit (TB) */
+	bool tb_bit_present;
+	uint8_t tb;
+
+	/* Block protection bits (BP) */
+	size_t bp_bit_count;
+	uint8_t bp[MAX_BP_BITS];
+};
+
 #endif /* !__WRITEPROTECT_H__ */