[mii] Add mii_dump() to dump all MII registers

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/include/ipxe/mii.h b/src/include/ipxe/mii.h
index cf462418a2a65821d908969fc5e76d522efcefa5..f53ad4a628d21cd46f656475c159187028e6b38b 100644 (file)
--- a/src/include/ipxe/mii.h
+++ b/src/include/ipxe/mii.h
@@ -78,6 +78,37 @@ 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