diff --git a/board/esd/common/auto_update.c b/board/esd/common/auto_update.c
index 5cd3423..001fd68 100644
--- a/board/esd/common/auto_update.c
+++ b/board/esd/common/auto_update.c
@@ -33,6 +33,7 @@
 #include <asm/byteorder.h>
 #include <linux/mtd/nand_legacy.h>
 #include <fat.h>
+#include <part.h>
 
 #include "auto_update.h"
 
@@ -71,8 +72,6 @@
 extern int flash_sect_erase(ulong, ulong);
 extern int flash_sect_protect (int, ulong, ulong);
 extern int flash_write (char *, ulong, ulong);
-/* change char* to void* to shutup the compiler */
-extern block_dev_desc_t *get_dev (char*, int);
 
 #if (CONFIG_COMMANDS & CFG_CMD_NAND) && defined(CFG_NAND_LEGACY)
 /* references to names in cmd_nand.c */
diff --git a/board/mcc200/auto_update.c b/board/mcc200/auto_update.c
index 12091fd..df003fe 100644
--- a/board/mcc200/auto_update.c
+++ b/board/mcc200/auto_update.c
@@ -23,6 +23,7 @@
 #include <image.h>
 #include <asm/byteorder.h>
 #include <usb.h>
+#include <part.h>
 
 #ifdef CFG_HUSH_PARSER
 #include <hush.h>
@@ -128,8 +129,6 @@
 extern int flash_sect_erase(ulong, ulong);
 extern int flash_sect_protect (int, ulong, ulong);
 extern int flash_write (char *, ulong, ulong);
-/* change char* to void* to shutup the compiler */
-extern block_dev_desc_t *get_dev (char*, int);
 extern int u_boot_hush_start(void);
 
 int au_check_cksum_valid(int idx, long nbytes)
diff --git a/board/mpl/mip405/mip405.c b/board/mpl/mip405/mip405.c
index 34f3289..1324978 100644
--- a/board/mpl/mip405/mip405.c
+++ b/board/mpl/mip405/mip405.c
@@ -73,9 +73,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-extern block_dev_desc_t * scsi_get_dev(int dev);
-extern block_dev_desc_t * ide_get_dev(int dev);
-
 #undef SDRAM_DEBUG
 #define ENABLE_ECC /* for ecc boards */
 #define FALSE           0
diff --git a/board/trab/auto_update.c b/board/trab/auto_update.c
index d2c8d44..f4074ae 100644
--- a/board/trab/auto_update.c
+++ b/board/trab/auto_update.c
@@ -203,7 +203,6 @@
 /* change char* to void* to shutup the compiler */
 extern int i2c_write_multiple (uchar, uint, int, void *, int);
 extern int i2c_read_multiple (uchar, uint, int, void *, int);
-extern block_dev_desc_t *get_dev (char*, int);
 extern int u_boot_hush_start(void);
 
 int
diff --git a/common/cmd_ext2.c b/common/cmd_ext2.c
index 5db42f2..94bd9b6 100644
--- a/common/cmd_ext2.c
+++ b/common/cmd_ext2.c
@@ -33,6 +33,7 @@
  * Ext2fs support
  */
 #include <common.h>
+#include <part.h>
 
 #if (CONFIG_COMMANDS & CFG_CMD_EXT2)
 #include <config.h>
@@ -57,41 +58,6 @@
 #define PRINTF(fmt,args...)
 #endif
 
-static block_dev_desc_t *get_dev (char* ifname, int dev)
-{
-#if (CONFIG_COMMANDS & CFG_CMD_IDE)
-	if (strncmp(ifname,"ide",3)==0) {
-		extern block_dev_desc_t * ide_get_dev(int dev);
-		return((dev >= CFG_IDE_MAXDEVICE) ? NULL : ide_get_dev(dev));
-	}
-#endif
-#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
-	if (strncmp(ifname,"scsi",4)==0) {
-		extern block_dev_desc_t * scsi_get_dev(int dev);
-		return((dev >= CFG_SCSI_MAXDEVICE) ? NULL : scsi_get_dev(dev));
-	}
-#endif
-#if ((CONFIG_COMMANDS & CFG_CMD_USB) && defined(CONFIG_USB_STORAGE))
-	if (strncmp(ifname,"usb",3)==0) {
-		extern block_dev_desc_t * usb_stor_get_dev(int dev);
-		return((dev >= USB_MAX_STOR_DEV) ? NULL : usb_stor_get_dev(dev));
-	}
-#endif
-#if defined(CONFIG_MMC)
-	if (strncmp(ifname,"mmc",3)==0) {
-		extern block_dev_desc_t *  mmc_get_dev(int dev);
-		return((dev >= 1) ? NULL : mmc_get_dev(dev));
-	}
-#endif
-#if defined(CONFIG_SYSTEMACE)
-	if (strcmp(ifname,"ace")==0) {
-		extern block_dev_desc_t *  systemace_get_dev(int dev);
-		return((dev >= 1) ? NULL : systemace_get_dev(dev));
-	}
-#endif
-	return(NULL);
-}
-
 int do_ext2ls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	char *filename = "/";
@@ -106,7 +72,7 @@
 		return(1);
 	}
 	dev = (int)simple_strtoul (argv[2], &ep, 16);
-	dev_desc=get_dev(argv[1],dev);
+	dev_desc = get_dev(argv[1],dev);
 
 	if (dev_desc == NULL) {
 		printf ("\n** Block device %s %d not supported\n", argv[1], dev);
@@ -210,7 +176,7 @@
 	}
 
 	dev = (int)simple_strtoul (argv[2], &ep, 16);
-	dev_desc=get_dev(argv[1],dev);
+	dev_desc = get_dev(argv[1],dev);
 	if (dev_desc==NULL) {
 		printf ("\n** Block device %s %d not supported\n", argv[1], dev);
 		return(1);
diff --git a/common/cmd_fat.c b/common/cmd_fat.c
index 6844c10..afaf299 100644
--- a/common/cmd_fat.c
+++ b/common/cmd_fat.c
@@ -29,6 +29,7 @@
 #include <s_record.h>
 #include <net.h>
 #include <ata.h>
+#include <part.h>
 
 #if (CONFIG_COMMANDS & CFG_CMD_FAT)
 
@@ -37,42 +38,6 @@
 #include <fat.h>
 
 
-block_dev_desc_t *get_dev (char* ifname, int dev)
-{
-#if (CONFIG_COMMANDS & CFG_CMD_IDE)
-	if (strncmp(ifname,"ide",3)==0) {
-		extern block_dev_desc_t * ide_get_dev(int dev);
-		return(ide_get_dev(dev));
-	}
-#endif
-#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
-	if (strncmp(ifname,"scsi",4)==0) {
-		extern block_dev_desc_t * scsi_get_dev(int dev);
-		return(scsi_get_dev(dev));
-	}
-#endif
-#if ((CONFIG_COMMANDS & CFG_CMD_USB) && defined(CONFIG_USB_STORAGE))
-	if (strncmp(ifname,"usb",3)==0) {
-		extern block_dev_desc_t * usb_stor_get_dev(int dev);
-		return(usb_stor_get_dev(dev));
-	}
-#endif
-#if defined(CONFIG_MMC)
-	if (strncmp(ifname,"mmc",3)==0) {
-		extern block_dev_desc_t *  mmc_get_dev(int dev);
-		return(mmc_get_dev(dev));
-	}
-#endif
-#if defined(CONFIG_SYSTEMACE)
-	if (strcmp(ifname,"ace")==0) {
-		extern block_dev_desc_t *  systemace_get_dev(int dev);
-		return(systemace_get_dev(dev));
-	}
-#endif
-	return NULL;
-}
-
-
 int do_fat_fsload (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	long size;
diff --git a/common/cmd_ide.c b/common/cmd_ide.c
index a415502..ebc080c 100644
--- a/common/cmd_ide.c
+++ b/common/cmd_ide.c
@@ -31,20 +31,26 @@
 #include <command.h>
 #include <image.h>
 #include <asm/byteorder.h>
+
 #if defined(CONFIG_IDE_8xx_DIRECT) || defined(CONFIG_IDE_PCMCIA)
 # include <pcmcia.h>
 #endif
+
 #ifdef CONFIG_8xx
 # include <mpc8xx.h>
 #endif
+
 #ifdef CONFIG_MPC5xxx
 #include <mpc5xxx.h>
 #endif
+
 #include <ide.h>
 #include <ata.h>
+
 #ifdef CONFIG_STATUS_LED
 # include <status_led.h>
 #endif
+
 #ifndef __PPC__
 #include <asm/io.h>
 #ifdef __MIPS__
@@ -697,7 +703,7 @@
 
 block_dev_desc_t * ide_get_dev(int dev)
 {
-	return ((block_dev_desc_t *)&ide_dev_desc[dev]);
+	return (dev < CFG_IDE_MAXDEVICE) ? &ide_dev_desc[dev] : NULL;
 }
 
 
diff --git a/common/cmd_reiser.c b/common/cmd_reiser.c
index 508ffcb..09c86e6 100644
--- a/common/cmd_reiser.c
+++ b/common/cmd_reiser.c
@@ -35,6 +35,7 @@
 #include <linux/ctype.h>
 #include <asm/byteorder.h>
 #include <reiserfs.h>
+#include <part.h>
 
 #ifndef CONFIG_DOS_PARTITION
 #error DOS partition support must be selected
@@ -48,41 +49,6 @@
 #define PRINTF(fmt,args...)
 #endif
 
-static block_dev_desc_t *get_dev (char* ifname, int dev)
-{
-#if (CONFIG_COMMANDS & CFG_CMD_IDE)
-	if (strncmp(ifname,"ide",3)==0) {
-		extern block_dev_desc_t * ide_get_dev(int dev);
-		return((dev >= CFG_IDE_MAXDEVICE) ? NULL : ide_get_dev(dev));
-	}
-#endif
-#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
-	if (strncmp(ifname,"scsi",4)==0) {
-		extern block_dev_desc_t * scsi_get_dev(int dev);
-		return((dev >= CFG_SCSI_MAXDEVICE) ? NULL : scsi_get_dev(dev));
-	}
-#endif
-#if ((CONFIG_COMMANDS & CFG_CMD_USB) && defined(CONFIG_USB_STORAGE))
-	if (strncmp(ifname,"usb",3)==0) {
-		extern block_dev_desc_t * usb_stor_get_dev(int dev);
-		return((dev >= USB_MAX_STOR_DEV) ? NULL : usb_stor_get_dev(dev));
-	}
-#endif
-#if defined(CONFIG_MMC)
-	if (strncmp(ifname,"mmc",3)==0) {
-		extern block_dev_desc_t *  mmc_get_dev(int dev);
-		return((dev >= 1) ? NULL : mmc_get_dev(dev));
-	}
-#endif
-#if defined(CONFIG_SYSTEMACE)
-	if (strcmp(ifname,"ace")==0) {
-		extern block_dev_desc_t *  systemace_get_dev(int dev);
-		return((dev >= 1) ? NULL : systemace_get_dev(dev));
-	}
-#endif
-	return NULL;
-}
-
 int do_reiserls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	char *filename = "/";
@@ -97,7 +63,7 @@
 		return 1;
 	}
 	dev = (int)simple_strtoul (argv[2], &ep, 16);
-	dev_desc=get_dev(argv[1],dev);
+	dev_desc = get_dev(argv[1],dev);
 
 	if (dev_desc == NULL) {
 		printf ("\n** Block device %s %d not supported\n", argv[1], dev);
@@ -196,7 +162,7 @@
 	}
 
 	dev = (int)simple_strtoul (argv[2], &ep, 16);
-	dev_desc=get_dev(argv[1],dev);
+	dev_desc = get_dev(argv[1],dev);
 	if (dev_desc==NULL) {
 		printf ("\n** Block device %s %d not supported\n", argv[1], dev);
 		return 1;
diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
index cc08743..b17bebb 100644
--- a/common/cmd_scsi.c
+++ b/common/cmd_scsi.c
@@ -194,7 +194,7 @@
 
 block_dev_desc_t * scsi_get_dev(int dev)
 {
-	return((block_dev_desc_t *)&scsi_dev_desc[dev]);
+	return (dev < CFG_SCSI_MAX_DEVICE) ? &scsi_dev_desc[dev] : NULL;
 }
 
 
diff --git a/common/cmd_usb.c b/common/cmd_usb.c
index 28c05aa..904df71 100644
--- a/common/cmd_usb.c
+++ b/common/cmd_usb.c
@@ -28,6 +28,7 @@
 #include <common.h>
 #include <command.h>
 #include <asm/byteorder.h>
+#include <part.h>
 
 #if (CONFIG_COMMANDS & CFG_CMD_USB)
 
diff --git a/common/usb_storage.c b/common/usb_storage.c
index 06ea99b..b4b7914 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -56,6 +56,7 @@
 
 
 #if (CONFIG_COMMANDS & CFG_CMD_USB)
+#include <part.h>
 #include <usb.h>
 
 #ifdef CONFIG_USB_STORAGE
@@ -174,7 +175,7 @@
 
 block_dev_desc_t *usb_stor_get_dev(int index)
 {
-	return &usb_dev_desc[index];
+	return (index < USB_MAX_STOR_DEV) ? &usb_dev_desc[index] : NULL;
 }
 
 
diff --git a/cpu/pxa/mmc.c b/cpu/pxa/mmc.c
index f7020ee..c57d0d5 100644
--- a/cpu/pxa/mmc.c
+++ b/cpu/pxa/mmc.c
@@ -37,7 +37,7 @@
 
 block_dev_desc_t * mmc_get_dev(int dev)
 {
-	return ((block_dev_desc_t *)&mmc_dev);
+	return (dev == 0) ? &mmc_dev : NULL;
 }
 
 /*
diff --git a/disk/part.c b/disk/part.c
index 2255e72..f1026c5 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -24,6 +24,7 @@
 #include <common.h>
 #include <command.h>
 #include <ide.h>
+#include <part.h>
 
 #undef	PART_DEBUG
 
@@ -39,6 +40,54 @@
      defined(CONFIG_MMC) || \
      defined(CONFIG_SYSTEMACE) )
 
+struct block_drvr {
+	char *name;
+	block_dev_desc_t* (*get_dev)(int dev);
+};
+
+static const struct block_drvr block_drvr[] = {
+#if (CONFIG_COMMANDS & CFG_CMD_IDE)
+	{ .name = "ide", .get_dev = ide_get_dev, },
+#endif
+#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
+	{ .name = "scsi", .get_dev = scsi_get_dev, },
+#endif
+#if ((CONFIG_COMMANDS & CFG_CMD_USB) && defined(CONFIG_USB_STORAGE))
+	{ .name = "usb", .get_dev = usb_stor_get_dev, },
+#endif
+#if defined(CONFIG_MMC)
+	{ .name = "mmc", .get_dev = mmc_get_dev, },
+#endif
+#if defined(CONFIG_SYSTEMACE)
+	{ .name = "ace", .get_dev = systemace_get_dev, },
+#endif
+	{ },
+};
+
+block_dev_desc_t *get_dev(char* ifname, int dev)
+{
+	const struct block_drvr *drvr = block_drvr;
+
+	while (drvr->name) {
+		if (strncmp(ifname, drvr->name, strlen(drvr->name)) == 0)
+			return drvr->get_dev(dev);
+		drvr++;
+	}
+	return NULL;
+}
+#else
+block_dev_desc_t *get_dev(char* ifname, int dev)
+{
+	return NULL;
+}
+#endif
+
+#if ((CONFIG_COMMANDS & CFG_CMD_IDE)	|| \
+     (CONFIG_COMMANDS & CFG_CMD_SCSI)	|| \
+     (CONFIG_COMMANDS & CFG_CMD_USB)	|| \
+     defined(CONFIG_MMC) || \
+     defined(CONFIG_SYSTEMACE) )
+
 /* ------------------------------------------------------------------------- */
 /*
  * reports device info to the user
diff --git a/include/ide.h b/include/ide.h
index dfef32f..e29ed36 100644
--- a/include/ide.h
+++ b/include/ide.h
@@ -48,8 +48,8 @@
  * Function Prototypes
  */
 
-void  ide_init  (void);
-ulong ide_read	(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
-ulong ide_write (int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
+void ide_init(void);
+ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
+ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, ulong *buffer);
 
 #endif /* _IDE_H */
diff --git a/include/part.h b/include/part.h
index 318aa3c..f89ebc6 100644
--- a/include/part.h
+++ b/include/part.h
@@ -22,6 +22,7 @@
  */
 #ifndef _PART_H
 #define _PART_H
+
 #include <ide.h>
 
 typedef struct block_dev_desc {
@@ -83,6 +84,14 @@
 	uchar	type[32];	/* string type description		*/
 } disk_partition_t;
 
+/* Misc _get_dev functions */
+block_dev_desc_t* get_dev(char* ifname, int dev);
+block_dev_desc_t* ide_get_dev(int dev);
+block_dev_desc_t* scsi_get_dev(int dev);
+block_dev_desc_t* usb_stor_get_dev(int dev);
+block_dev_desc_t* mmc_get_dev(int dev);
+block_dev_desc_t* systemace_get_dev(int dev);
+
 /* disk/part.c */
 int get_partition_info (block_dev_desc_t * dev_desc, int part, disk_partition_t *info);
 void print_part (block_dev_desc_t *dev_desc);