--- /dev/null
+#ifndef _IPXE_MII_H
+#define _IPXE_MII_H
+
+/** @file
+ *
+ * Media Independent Interface
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <mii.h>
+#include <ipxe/netdevice.h>
+
+struct mii_interface;
+
+/** MII interface operations */
+struct mii_operations {
+ /**
+ * Read from MII register
+ *
+ * @v mii MII interface
+ * @v reg Register address
+ * @ret data Data read, or negative error
+ */
+ int ( * read ) ( struct mii_interface *mii, unsigned int reg );
+ /**
+ * Write to MII register
+ *
+ * @v mii MII interface
+ * @v reg Register address
+ * @v data Data to write
+ * @ret rc Return status code
+ */
+ int ( * write ) ( struct mii_interface *mii, unsigned int reg,
+ unsigned int data );
+};
+
+/** An MII interface */
+struct mii_interface {
+ /** Interface operations */
+ struct mii_operations *op;
+};
+
+/**
+ * Initialise MII interface
+ *
+ * @v mii MII interface
+ * @v op MII interface operations
+ */
+static inline __attribute__ (( always_inline )) void
+mii_init ( struct mii_interface *mii, struct mii_operations *op ) {
+ mii->op = op;
+}
+
+/**
+ * Read from MII register
+ *
+ * @v mii MII interface
+ * @v reg Register address
+ * @ret data Data read, or negative error
+ */
+static inline __attribute__ (( always_inline )) int
+mii_read ( struct mii_interface *mii, unsigned int reg ) {
+ return mii->op->read ( mii, reg );
+}
+
+/**
+ * Write to MII register
+ *
+ * @v mii MII interface
+ * @v reg Register address
+ * @v data Data to write
+ * @ret rc Return status code
+ */
+static inline __attribute__ (( always_inline )) int
+mii_write ( struct mii_interface *mii, unsigned int reg, unsigned int data ) {
+ return mii->op->write ( mii, reg, data );
+}
+
+/**
+ * Dump MII registers (for debugging)
+ *
+ * @v mii MII interface
+ */
+static inline void
+mii_dump ( struct mii_interface *mii ) {
+ unsigned int i;
+ int data;
+
+ /* Do nothing unless debug output is enabled */
+ if ( ! DBG_LOG )
+ return;
+
+ /* Dump basic MII register set */
+ for ( i = 0 ; i < 16 ; i++ ) {
+ if ( ( i % 8 ) == 0 ) {
+ DBGC ( mii, "MII %p registers %02x-%02x:",
+ mii, i, ( i + 7 ) );
+ }
+ data = mii_read ( mii, i );
+ if ( data >= 0 ) {
+ DBGC ( mii, " %04x", data );
+ } else {
+ DBGC ( mii, " XXXX" );
+ }
+ if ( ( i % 8 ) == 7 )
+ DBGC ( mii, "\n" );
+ }
+}
+
+/** Maximum time to wait for a reset, in milliseconds */
+#define MII_RESET_MAX_WAIT_MS 500
+
+extern int mii_restart ( struct mii_interface *mii );
+extern int mii_reset ( struct mii_interface *mii );
+
+#endif /* _IPXE_MII_H */