diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 60a0b7de8e57..15a6c3b9bc9a 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -520,16 +520,9 @@ MODULE_SUPPORTED_DEVICE("{{RME HDSPM-MADI}}");
 #define HDSPM_DMA_AREA_BYTES (HDSPM_MAX_CHANNELS * HDSPM_CHANNEL_BUFFER_BYTES)
 #define HDSPM_DMA_AREA_KILOBYTES (HDSPM_DMA_AREA_BYTES/1024)
 
-/* revisions >= 230 indicate AES32 card */
-#define HDSPM_MADI_ANCIENT_REV	204
-#define HDSPM_MADI_OLD_REV	207
-#define HDSPM_MADI_REV		210
 #define HDSPM_RAYDAT_REV	211
 #define HDSPM_AIO_REV		212
 #define HDSPM_MADIFACE_REV	213
-#define HDSPM_AES_REV		240
-#define HDSPM_AES32_REV		234
-#define HDSPM_AES32_OLD_REV	233
 
 /* speed factor modes */
 #define HDSPM_SPEED_SINGLE 0
@@ -6503,13 +6496,6 @@ static int __devinit snd_hdspm_create(struct snd_card *card,
 	strcpy(card->driver, "HDSPM");
 
 	switch (hdspm->firmware_rev) {
-	case HDSPM_MADI_REV:
-	case HDSPM_MADI_OLD_REV:
-	case HDSPM_MADI_ANCIENT_REV:
-		hdspm->io_type = MADI;
-		hdspm->card_name = "RME MADI";
-		hdspm->midiPorts = 3;
-		break;
 	case HDSPM_RAYDAT_REV:
 		hdspm->io_type = RayDAT;
 		hdspm->card_name = "RME RayDAT";
@@ -6525,17 +6511,25 @@ static int __devinit snd_hdspm_create(struct snd_card *card,
 		hdspm->card_name = "RME MADIface";
 		hdspm->midiPorts = 1;
 		break;
-	case HDSPM_AES_REV:
-	case HDSPM_AES32_REV:
-	case HDSPM_AES32_OLD_REV:
-		hdspm->io_type = AES32;
-		hdspm->card_name = "RME AES32";
-		hdspm->midiPorts = 2;
-		break;
 	default:
-		snd_printk(KERN_ERR "HDSPM: unknown firmware revision %x\n",
+		if ((hdspm->firmware_rev == 0xf0) ||
+			((hdspm->firmware_rev >= 0xe6) &&
+					(hdspm->firmware_rev <= 0xea))) {
+			hdspm->io_type = AES32;
+			hdspm->card_name = "RME AES32";
+			hdspm->midiPorts = 2;
+		} else if ((hdspm->firmware_rev == 0xd5) ||
+			((hdspm->firmware_rev >= 0xc8)  &&
+				(hdspm->firmware_rev <= 0xcf))) {
+			hdspm->io_type = MADI;
+			hdspm->card_name = "RME MADI";
+			hdspm->midiPorts = 3;
+		} else {
+			snd_printk(KERN_ERR
+				"HDSPM: unknown firmware revision %x\n",
 				hdspm->firmware_rev);
-		return -ENODEV;
+			return -ENODEV;
+		}
 	}
 
 	err = pci_enable_device(pci);