Don't attach to Dell PERC2/QC cards that have a firmware rev of 1.x. This

check is complicated by the fact that the Adaptec 5400S cards claim to use
1.x firmware also.  PERC2/QC 1.x firmware is not compatible with this driver
and will cause a system hang.

MFC after:	3 days

sys/dev/aac/aac.c

@@ -100,6 +100,7 @@ static void	aac_unmap_command(struct aac_command *cm);
 /* Hardware Interface */
 static void	aac_common_map(void *arg, bus_dma_segment_t *segs, int nseg,
 			       int error);
+static int	aac_check_firmware(struct aac_softc *sc);
 static int	aac_init(struct aac_softc *sc);
 static int	aac_sync_command(struct aac_softc *sc, u_int32_t command,
 				 u_int32_t arg0, u_int32_t arg1, u_int32_t arg2,
@@ -258,6 +259,12 @@ aac_attach(struct aac_softc *sc)
 	/* mark controller as suspended until we get ourselves organised */
 	sc->aac_state |= AAC_STATE_SUSPEND;
 
+	/*
+	 * Check that the firmware on the card is supported.
+	 */
+	if ((error = aac_check_firmware(sc)) != 0)
+		return(error);
+
 	/*
 	 * Allocate command structures.
 	 */
@@ -1345,6 +1352,39 @@ aac_common_map(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 	sc->aac_common_busaddr = segs[0].ds_addr;
 }
 
+/*
+ * Retrieve the firmware version numbers.  Dell PERC2/QC cards with
+ * firmware version 1.x are not compatible with this driver.
+ */
+static int
+aac_check_firmware(struct aac_softc *sc)
+{
+	u_int32_t major, minor;
+
+	debug_called(1);
+
+	if (sc->quirks & AAC_QUIRK_PERC2QC) {
+		if (aac_sync_command(sc, AAC_MONKER_GETKERNVER, 0, 0, 0, 0,
+				     NULL)) {
+			device_printf(sc->aac_dev,
+				      "Error reading firmware version\n");
+			return (EIO);
+		}
+
+		/* These numbers are stored as ASCII! */
+		major = (AAC_GETREG4(sc, AAC_SA_MAILBOX + 4) & 0xff) - 0x30;
+		minor = (AAC_GETREG4(sc, AAC_SA_MAILBOX + 8) & 0xff) - 0x30;
+		if (major == 1) {
+			device_printf(sc->aac_dev,
+			    "Firmware version %d.%d is not supported.\n",
+			    major, minor);
+			return (EINVAL);
+		}
+	}
+
+	return (0);
+}
+
 static int
 aac_init(struct aac_softc *sc)
 {

sys/dev/aac/aac_pci.c

@@ -295,6 +295,14 @@ aac_pci_attach(device_t dev)
 		goto out;
 	}
 
+
+	/*
+	 * Check for quirky hardware
+	 */
+	if (pci_get_subdevice(dev) == 0x1364 && 
+	    pci_get_subvendor(dev) == 0x9005)
+		sc->quirks |= AAC_QUIRK_PERC2QC;
+
 	/*
 	 * Do bus-independent initialisation.
 	 */

sys/dev/aac/aacreg.h

@@ -523,6 +523,7 @@ struct aac_adapter_info {
  */
 #define AAC_MONKER_INITSTRUCT	0x05
 #define AAC_MONKER_SYNCFIB	0x0c
+#define AAC_MONKER_GETKERNVER	0x11
 
 /*
  *  Adapter Status Register

sys/dev/aac/aacvar.h

@@ -356,6 +356,8 @@ struct aac_softc
 #define AAC_AIFFLAGS_PENDING	(1 << 1)
 #define	AAC_AIFFLAGS_EXIT	(1 << 2)
 #define AAC_AIFFLAGS_EXITED	(1 << 3)
+	u_int32_t		quirks;
+#define AAC_QUIRK_PERC2QC	(1 << 0)
 };