diff --git a/drivers/mmcsd/Make.defs b/drivers/mmcsd/Make.defs
index 6ada25acb2778345972dc0cccde346fcff3cfa94..459b317d63290837b9ade0e36d866daec35e898c 100644
--- a/drivers/mmcsd/Make.defs
+++ b/drivers/mmcsd/Make.defs
@@ -37,6 +37,6 @@ MMCSD_ASRCS  =
 MMCSD_CSRCS  =
 
 ifneq ($(CONFIG_DISABLE_MOUNTPOINT),y)
-MMCSD_CSRCS  += mmcsd_spi.c
+MMCSD_CSRCS  += mmcsd_spi.c mmcsd_debug.c
 endif
 
diff --git a/drivers/mmcsd/mmcsd_debug.c b/drivers/mmcsd/mmcsd_debug.c
new file mode 100644
index 0000000000000000000000000000000000000000..85e2d7d444fb6515fef54b6c137b6af80954cf6c
--- /dev/null
+++ b/drivers/mmcsd/mmcsd_debug.c
@@ -0,0 +1,245 @@
+/****************************************************************************
+ * drivers/mmcsd/mmcsd_debug.c
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <debug.h>
+
+#include "mmcsd_csd.h"
+#include "mmcsd_internal.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* This needs to match the logic in include/debug.h */
+
+#ifdef CONFIG_CPP_HAVE_VARARGS
+#  define message(format, arg...) lib_rawprintf(format, ##arg)
+#else
+#  define message lib_rawprintf
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: mmcsd_dmpcsd
+ *
+ * Description:
+ *   Dump the contents a buffer
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_MMCSD_DUMPALL
+void mmcsd_dumpbuffer(FAR const ubyte *buffer, unsigned int buflen)
+{
+  int i, j, k;
+
+  for (i = 0; i < buflen; i += 32)
+    {
+       message("%04x: ", i);
+       for (j = 0; j < 32; j++)
+         {
+           k = i + j;
+
+           if (j == 16)
+             {
+               message(" ");
+             }
+
+           if (k < buflen)
+             {
+               message("%02x", buffer[k]);
+             }
+           else
+             {
+               message("  ");
+             }
+         }
+
+       message(" ");
+       for (j = 0; j < 32; j++)
+         {
+           k = i + j;
+
+           if (j == 16)
+             {
+               message(" ");
+             }
+
+           if (k < buflen)
+             {
+               if (buffer[k] >= 0x20 && buffer[k] < 0x7f)
+                 {
+                   message("%c", buffer[k]);
+                 }
+               else
+                 {
+                   message(".");
+                 }
+             }
+         }
+       message("\n");
+    }
+}
+#endif
+
+/****************************************************************************
+ * Name: mmcsd_dmpcsd
+ *
+ * Description:
+ *   Dump the contents of the CSD
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_FS)
+void mmcsd_dmpcsd(FAR const ubyte *csd, ubyte cardtype)
+{
+  boolean mmc = (cardtype == MMCSD_CARDTYPE_MMC);
+  boolean sd2 = (MMCSD_CSD_CSDSTRUCT(csd) == 1);
+
+  fvdbg("CSD\n");
+  fvdbg("  CSD_STRUCTURE:           1.%d\n",   MMCSD_CSD_CSDSTRUCT(csd));
+  if (mmc)
+    {
+      fvdbg("  MMC SPEC_VERS:           %d\n", MMC_CSD_SPECVERS(csd));
+    }
+  fvdbg("  TAAC:\n",
+      sd2 ? SD20_CSD_TAC_TIMEVALUE(csd) : MMCSD_CSD_TAAC_TIMEVALUE(csd));
+  fvdbg("    TIME_VALUE:            0x%02x\n",
+      sd2 ? SD20_CSD_TAC_TIMEVALUE(csd) : MMCSD_CSD_TAAC_TIMEVALUE(csd));
+  fvdbg("    TIME_UNIT:             0x%02x\n",
+      sd2 ? SD20_CSD_TAC_TIMEUNIT(csd) : MMCSD_CSD_TAAC_TIMEUNIT(csd));
+  fvdbg("  NSAC:                    0x%02x\n",
+      sd2 ? SD20_CSD_NSAC(csd) : MMCSD_CSD_NSAC(csd));
+  fvdbg("  TRAN_SPEED:\n");
+  fvdbg("    TIME_VALUE:            0x%02x\n",
+      sd2 ? SD20_CSD_TRANSPEED_TIMEVALUE(csd) : MMCSD_CSD_TRANSPEED_TIMEVALUE(csd));
+  fvdbg("    RATE_UNIT:             0x%02x\n",
+      sd2 ? SD20_CSD_TRANSPEED_TRANSFERRATEUNIT(csd) : MMCSD_CSD_TRANSPEED_TRANSFERRATEUNIT(csd));
+  fvdbg("  CCC:                     0x%03x\n",
+      sd2 ? SD20_CSD_CCC(csd) : MMCSD_CSD_CCC(csd));
+  fvdbg("  READ_BL_LEN:             %d\n",
+      sd2 ? SD20_CSD_READBLLEN(csd) : MMCSD_CSD_READBLLEN(csd));
+  fvdbg("  READ_BL_PARTIAL:         %d\n",
+      sd2 ? SD20_CSD_READBLPARTIAL(csd) : MMCSD_CSD_READBLPARTIAL(csd));
+  fvdbg("  WRITE_BLK_MISALIGN:      %d\n",
+      sd2 ? SD20_CSD_WRITEBLKMISALIGN(csd) : MMCSD_CSD_WRITEBLKMISALIGN(csd));
+  fvdbg("  READ_BLK_MISALIGN:       %d\n",
+      sd2 ? SD20_CSD_READBLKMISALIGN(csd) : MMCSD_CSD_READBLKMISALIGN(csd));
+  fvdbg("  DSR_IMP:                 %d\n",
+      sd2 ? SD20_CSD_DSRIMP(csd) : MMCSD_CSD_DSRIMP(csd));
+  fvdbg("  C_SIZE:                  %d\n",
+      sd2 ? SD20_CSD_CSIZE(csd) : MMCSD_CSD_CSIZE(csd));
+  fvdbg("  VDD_R_CURR_MIN:          %d\n",
+      sd2 ? SD20_CSD_VDDRCURRMIN(csd) : MMCSD_CSD_VDDRCURRMIN(csd));
+  fvdbg("  VDD_R_CURR_MAX:          %d\n",
+      sd2 ? SD20_CSD_VDDRCURRMAX(csd) : MMCSD_CSD_VDDRCURRMAX(csd));
+  fvdbg("  VDD_W_CURR_MIN:          %d\n",
+      sd2 ? SD20_CSD_VDDWCURRMIN(csd) : MMCSD_CSD_VDDWCURRMIN(csd));
+  fvdbg("  VDD_W_CURR_MAX:          %d\n",
+      sd2 ? SD20_CSD_VDDWCURRMAX(csd) : MMCSD_CSD_VDDWCURRMAX(csd));
+  fvdbg("  C_SIZE_MULT:             %d\n",
+      sd2 ? SD20_CSD_CSIZEMULT(csd) : MMCSD_CSD_CSIZEMULT(csd));
+  if (mmc)
+    {
+      fvdbg("  MMC SECTOR_SIZE:        %d\n", MMC_CSD_SECTORSIZE(csd));
+      fvdbg("  MMC ER_GRP_SIZE:        %d\n", MMC_CSD_ERGRPSIZE(csd));
+      fvdbg("  MMC WP_GRP_SIZE:        %d\n",  MMC_CSD_WPGRPSIZE(csd));
+      fvdbg("  MMC DFLT_ECC:           %d\n",  MMC_CSD_DFLTECC(csd));
+    }
+  else
+    {
+      fvdbg("  SD ER_BLK_EN:            %d\n",
+          sd2 ? SD20_CSD_SDERBLKEN(csd) : SD_CSD_SDERBLKEN(csd));
+      fvdbg("  SD SECTOR_SIZE:          %d\n",
+          sd2 ? SD20_CSD_SECTORSIZE(csd) : SD_CSD_SECTORSIZE(csd));
+      fvdbg("  SD WP_GRP_SIZE:          %d\n",
+          sd2 ? SD_CSD_WPGRPSIZE(csd) : SD_CSD_WPGRPSIZE(csd));
+    }
+  fvdbg("  WP_GRP_EN:               %d\n",
+      sd2 ? SD20_WPGRPEN(csd) : MMCSD_WPGRPEN(csd));
+  fvdbg("  R2W_FACTOR:              %d\n",
+      sd2 ? SD20_CSD_R2WFACTOR(csd) : MMCSD_CSD_R2WFACTOR(csd));
+  fvdbg("  WRITE_BL_LEN:            %d\n",
+      sd2 ? SD20_CSD_WRITEBLLEN(csd) : MMCSD_CSD_WRITEBLLEN(csd));
+  fvdbg("  WRITE_BL_PARTIAL:        %d\n",
+      sd2 ? SD20_CSD_WRITEBLPARTIAL(csd) : MMCSD_CSD_WRITEBLPARTIAL(csd));
+  fvdbg("  FILE_FORMAT_GROUP:       %d\n",
+      sd2 ? SD20_CSD_FILEFORMATGRP(csd) : MMCSD_CSD_FILEFORMATGRP(csd));
+  fvdbg("  COPY:                    %d\n",
+      sd2 ? SD20_CSD_COPY(csd) : MMCSD_CSD_COPY(csd));
+  fvdbg("  PERM_WRITE_PROTECT:      %d\n",
+      sd2 ? SD20_CSD_PERMWRITEPROTECT(csd) : MMCSD_CSD_PERMWRITEPROTECT(csd));
+  fvdbg("  TMP_WRITE_PROTECT:       %d\n",
+      sd2 ?SD20_CSD_TMPWRITEPROTECT(csd) : MMCSD_CSD_TMPWRITEPROTECT(csd));
+  fvdbg("  FILE_FORMAT:             %d\n",
+      sd2 ? SD20_CSD_FILEFORMAT(csd) : MMCSD_CSD_FILEFORMAT(csd));
+  if (mmc)
+    {
+      fvdbg("  MMC ECC:                 %d\n",
+          sd2 ? MMC_CSD_ECC(csd) : MMC_CSD_ECC(csd));
+    }
+  fvdbg("  CRC:                     %02x\n",
+      sd2 ? SD20_CSD_CRC(csd) : MMCSD_CSD_CRC(csd));
+}
+#endif
diff --git a/drivers/mmcsd/mmcsd_internal.h b/drivers/mmcsd/mmcsd_internal.h
new file mode 100644
index 0000000000000000000000000000000000000000..c49429a42b6c93b667205d9f4da217b23171fe54
--- /dev/null
+++ b/drivers/mmcsd/mmcsd_internal.h
@@ -0,0 +1,96 @@
+/****************************************************************************
+ * drivers/mmcsd/mmcsd_internal.h
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+#ifndef __DRIVERS_MMCSD_MMCSD_INTERNAL_H
+#define __DRIVERS_MMCSD_MMCSD_INTERNAL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* Enable excessive debug options */
+
+#undef CONFIG_MMCSD_DUMPALL /* MUST BE DEFINED MANUALLY */
+
+#if !defined(CONFIG_DEBUG_VERBOSE) || !defined(CONFIG_DEBUG_FS)
+#  undef CONFIG_MMCSD_DUMPALL
+#endif
+
+/* Card type */
+
+#define MMCSD_CARDTYPE_UNKNOWN       0
+#define MMCSD_CARDTYPE_MMC           1
+#define MMCSD_CARDTYPE_SD            2
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+#ifdef CONFIG_MMCSD_DUMPALL
+EXTERN void mmcsd_dumpbuffer(FAR const ubyte *buffer, unsigned int buflen);
+#else
+#  define mmcsd_dumpbuffer(b,l)
+#endif
+
+#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_FS)
+EXTERN void mmcsd_dmpcsd(FAR const ubyte *csd, ubyte cardtype);
+#else
+#  define mmcsd_dmpcsd(csd,cadtype)
+#endif
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+#endif /* __DRIVERS_MMCSD_MMCSD_INTERNAL_H */
diff --git a/drivers/mmcsd/mmcsd_spi.c b/drivers/mmcsd/mmcsd_spi.c
index 94f51a0823e4f7ce67d646e1883c0533343f3501..53754053693c7a9e6e122b437b41f50f8998fa22 100644
--- a/drivers/mmcsd/mmcsd_spi.c
+++ b/drivers/mmcsd/mmcsd_spi.c
@@ -53,6 +53,7 @@
 
 #include "mmcsd_spi.h"
 #include "mmcsd_csd.h"
+#include "mmcsd_internal.h"
 
 /****************************************************************************
  * Pre-Processor Definitions
@@ -81,12 +82,6 @@
 #define MMCSD_SLOTSTATUS_WRPROTECT   0x04 /* Card is write protected */
 #define MMCSD_SLOTSTATUS_MEDIACHGD   0x08 /* Media changed in slot */
 
-/* Card type */
-
-#define MMCSD_CARDTYPE_UNKNOWN       0
-#define MMCSD_CARDTYPE_MMC           1
-#define MMCSD_CARDTYPE_SD            2
-
 /* Values in the MMC/SD command table ***************************************/
 /* These define the expected arguments of the MMC/SD command */
 
@@ -140,13 +135,7 @@ struct mmcsd_cmdinfo_s
  * Private Function Prototypes
  ****************************************************************************/
 
-/* Debug ********************************************************************/
-
-#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_FS)
-static void mmcsd_dmpcsd(FAR struct mmcsd_slot_s *slot, ubyte *csd);
-#else
-#  define mmcsd_dmpcsd(slot, csd)
-#endif
+/* Misc *********************************************************************/
 
 static void   mmcsd_semtake(sem_t *sem);
 
@@ -306,108 +295,6 @@ static const struct mmcsd_cmdinfo_s g_acmd41 = {0x69, MMCSD_CMDARG_NONE,    MMCS
  * Private Functions
  ****************************************************************************/
 
-/****************************************************************************
- * Name: mmcsd_dmpcsd
- *
- * Description:
- *   Dump the contents of the CSD
- *
- ****************************************************************************/
-
-#if defined(CONFIG_DEBUG_VERBOSE) && defined(CONFIG_DEBUG_FS)
-static void mmcsd_dmpcsd(FAR struct mmcsd_slot_s *slot, ubyte *csd)
-{
-  boolean mmc = (slot->type == MMCSD_CARDTYPE_MMC);
-  boolean sd2 = (MMCSD_CSD_CSDSTRUCT(csd) == 1);
-
-  fvdbg("CSD\n");
-  fvdbg("  CSD_STRUCTURE:           1.%d\n",   MMCSD_CSD_CSDSTRUCT(csd));
-  if (mmc)
-    {
-      fvdbg("  MMC SPEC_VERS:           %d\n", MMC_CSD_SPECVERS(csd));
-    }
-  fvdbg("  TAAC:\n",
-      sd2 ? SD20_CSD_TAC_TIMEVALUE(csd) : MMCSD_CSD_TAAC_TIMEVALUE(csd));
-  fvdbg("    TIME_VALUE:            0x%02x\n",
-      sd2 ? SD20_CSD_TAC_TIMEVALUE(csd) : MMCSD_CSD_TAAC_TIMEVALUE(csd));
-  fvdbg("    TIME_UNIT:             0x%02x\n",
-      sd2 ? SD20_CSD_TAC_TIMEUNIT(csd) : MMCSD_CSD_TAAC_TIMEUNIT(csd));
-  fvdbg("  NSAC:                    0x%02x\n",
-      sd2 ? SD20_CSD_NSAC(csd) : MMCSD_CSD_NSAC(csd));
-  fvdbg("  TRAN_SPEED:\n");
-  fvdbg("    TIME_VALUE:            0x%02x\n",
-      sd2 ? SD20_CSD_TRANSPEED_TIMEVALUE(csd) : MMCSD_CSD_TRANSPEED_TIMEVALUE(csd));
-  fvdbg("    RATE_UNIT:             0x%02x\n",
-      sd2 ? SD20_CSD_TRANSPEED_TRANSFERRATEUNIT(csd) : MMCSD_CSD_TRANSPEED_TRANSFERRATEUNIT(csd));
-  fvdbg("  CCC:                     0x%03x\n",
-      sd2 ? SD20_CSD_CCC(csd) : MMCSD_CSD_CCC(csd));
-  fvdbg("  READ_BL_LEN:             %d\n",
-      sd2 ? SD20_CSD_READBLLEN(csd) : MMCSD_CSD_READBLLEN(csd));
-  fvdbg("  READ_BL_PARTIAL:         %d\n",
-      sd2 ? SD20_CSD_READBLPARTIAL(csd) : MMCSD_CSD_READBLPARTIAL(csd));
-  fvdbg("  WRITE_BLK_MISALIGN:      %d\n",
-      sd2 ? SD20_CSD_WRITEBLKMISALIGN(csd) : MMCSD_CSD_WRITEBLKMISALIGN(csd));
-  fvdbg("  READ_BLK_MISALIGN:       %d\n",
-      sd2 ? SD20_CSD_READBLKMISALIGN(csd) : MMCSD_CSD_READBLKMISALIGN(csd));
-  fvdbg("  DSR_IMP:                 %d\n",
-      sd2 ? SD20_CSD_DSRIMP(csd) : MMCSD_CSD_DSRIMP(csd));
-  fvdbg("  C_SIZE:                  %d\n",
-      sd2 ? SD20_CSD_CSIZE(csd) : MMCSD_CSD_CSIZE(csd));
-  fvdbg("  VDD_R_CURR_MIN:          %d\n",
-      sd2 ? SD20_CSD_VDDRCURRMIN(csd) : MMCSD_CSD_VDDRCURRMIN(csd));
-  fvdbg("  VDD_R_CURR_MAX:          %d\n",
-      sd2 ? SD20_CSD_VDDRCURRMAX(csd) : MMCSD_CSD_VDDRCURRMAX(csd));
-  fvdbg("  VDD_W_CURR_MIN:          %d\n",
-      sd2 ? SD20_CSD_VDDWCURRMIN(csd) : MMCSD_CSD_VDDWCURRMIN(csd));
-  fvdbg("  VDD_W_CURR_MAX:          %d\n",
-      sd2 ? SD20_CSD_VDDWCURRMAX(csd) : MMCSD_CSD_VDDWCURRMAX(csd));
-  fvdbg("  C_SIZE_MULT:             %d\n",
-      sd2 ? SD20_CSD_CSIZEMULT(csd) : MMCSD_CSD_CSIZEMULT(csd));
-  if (mmc)
-    {
-      fvdbg("  MMC SECTOR_SIZE:        %d\n", MMC_CSD_SECTORSIZE(csd));
-      fvdbg("  MMC ER_GRP_SIZE:        %d\n", MMC_CSD_ERGRPSIZE(csd));
-      fvdbg("  MMC WP_GRP_SIZE:        %d\n",  MMC_CSD_WPGRPSIZE(csd));
-      fvdbg("  MMC DFLT_ECC:           %d\n",  MMC_CSD_DFLTECC(csd));
-    }
-  else
-    {
-      fvdbg("  SD ER_BLK_EN:            %d\n",
-          sd2 ? SD20_CSD_SDERBLKEN(csd) : SD_CSD_SDERBLKEN(csd));
-      fvdbg("  SD SECTOR_SIZE:          %d\n",
-          sd2 ? SD20_CSD_SECTORSIZE(csd) : SD_CSD_SECTORSIZE(csd));
-      fvdbg("  SD WP_GRP_SIZE:          %d\n",
-          sd2 ? SD_CSD_WPGRPSIZE(csd) : SD_CSD_WPGRPSIZE(csd));
-    }
-  fvdbg("  WP_GRP_EN:               %d\n",
-      sd2 ? SD20_WPGRPEN(csd) : MMCSD_WPGRPEN(csd));
-  fvdbg("  R2W_FACTOR:              %d\n",
-      sd2 ? SD20_CSD_R2WFACTOR(csd) : MMCSD_CSD_R2WFACTOR(csd));
-  fvdbg("  WRITE_BL_LEN:            %d\n",
-      sd2 ? SD20_CSD_WRITEBLLEN(csd) : MMCSD_CSD_WRITEBLLEN(csd));
-  fvdbg("  WRITE_BL_PARTIAL:        %d\n",
-      sd2 ? SD20_CSD_WRITEBLPARTIAL(csd) : MMCSD_CSD_WRITEBLPARTIAL(csd));
-  fvdbg("  FILE_FORMAT_GROUP:       %d\n",
-      sd2 ? SD20_CSD_FILEFORMATGRP(csd) : MMCSD_CSD_FILEFORMATGRP(csd));
-  fvdbg("  COPY:                    %d\n",
-      sd2 ? SD20_CSD_COPY(csd) : MMCSD_CSD_COPY(csd));
-  fvdbg("  PERM_WRITE_PROTECT:      %d\n",
-      sd2 ? SD20_CSD_PERMWRITEPROTECT(csd) : MMCSD_CSD_PERMWRITEPROTECT(csd));
-  fvdbg("  TMP_WRITE_PROTECT:       %d\n",
-      sd2 ?SD20_CSD_TMPWRITEPROTECT(csd) : MMCSD_CSD_TMPWRITEPROTECT(csd));
-  fvdbg("  FILE_FORMAT:             %d\n",
-      sd2 ? SD20_CSD_FILEFORMAT(csd) : MMCSD_CSD_FILEFORMAT(csd));
-  if (mmc)
-    {
-      fvdbg("  MMC ECC:                 %d\n",
-          sd2 ? MMC_CSD_ECC(csd) : MMC_CSD_ECC(csd));
-    }
-  fvdbg("  CRC:                     %02x\n",
-      sd2 ? SD20_CSD_CRC(csd) : MMCSD_CSD_CRC(csd));
-}
-#endif
-
-
 /****************************************************************************
  * Name: mmcsd_semtake
  ****************************************************************************/
@@ -949,6 +836,9 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
 
           SPI_SELECT(spi, FALSE);
           mmcsd_semgive(&slot->sem);
+
+          fvdbg("(%d) Read %d bytes:\n", i, nbytes);
+          mmcsd_dumpbuffer(buffer, nbytes);
           return nsectors;
         }
     }
@@ -1034,7 +924,8 @@ static ssize_t mmcsd_write(FAR struct inode *inode, const unsigned char *buffer,
 
   nbytes = nsectors * slot->sectorsize;
   offset = start_sector * slot->sectorsize;
-  fvdbg("nbytes=%d offset=%d\n", nbytes, offset);
+  fvdbg("Writing %d bytes to offset %d:\n", nbytes, offset);
+  mmcsd_dumpbuffer(buffer, nbytes);
 
   /* Select the slave and synchronize */
 
@@ -1352,7 +1243,7 @@ static int mmcsd_mediainitialize(FAR struct mmcsd_slot_s *slot)
     {
       fdbg("Found SD card\n");
     }
-  mmcsd_dmpcsd(slot, csd);
+  mmcsd_dmpcsd(csd, slot->type);
 #endif
 
   /* CSD data and set block size */
diff --git a/drivers/mmcsd/mmcsd_spi.h b/drivers/mmcsd/mmcsd_spi.h
index 38f02b489ff6d35621c48351019e4f9c880d042e..dea902446f2b41f1588a7931975e556316d6327d 100644
--- a/drivers/mmcsd/mmcsd_spi.h
+++ b/drivers/mmcsd/mmcsd_spi.h
@@ -33,7 +33,7 @@
  *
  ****************************************************************************/
 
-#ifndef __DRIVERS_MMCSD_MMCSD_SPI_HO
+#ifndef __DRIVERS_MMCSD_MMCSD_SPI_H
 #define __DRIVERS_MMCSD_MMCSD_SPI_H
 
 /****************************************************************************