[PATCH] USB: shuttle_usbat: Hardcode detection of HP CDRW devices

Use USB vendor and product IDs to determine whether the attached
device is a CDROM or a Flash device. Daniel Drake says that the
*same* vendor and product IDs for non-HP vendor ID could be either
flash or cdrom, so try to probe for them.

Signed-off-by: Peter Chubb <[e-mail]>
Signed-off-by: Daniel Drake <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/storage/shuttle_usbat.c

···
  * Set the transport function based on the device type
  */
 static int usbat_set_transport(struct us_data *us,
-			       struct usbat_info *info)
+			       struct usbat_info *info,
+			       int devicetype)
 {
-	int rc;
 
-	if (!info->devicetype) {
-		rc = usbat_identify_device(us, info);
-		if (rc != USB_STOR_TRANSPORT_GOOD) {
-			US_DEBUGP("usbat_set_transport: Could not identify device\n");
-			return 1;
-		}
-	}
+	if (!info->devicetype)
+		info->devicetype = devicetype;
 
-	if (usbat_get_device_type(us) == USBAT_DEV_HP8200)
+	if (!info->devicetype)
+		usbat_identify_device(us, info);
+
+	switch (info->devicetype) {
+	default:
+		return USB_STOR_TRANSPORT_ERROR;
+
+	case  USBAT_DEV_HP8200:
 		us->transport = usbat_hp8200e_transport;
-	else if (usbat_get_device_type(us) == USBAT_DEV_FLASH)
+		break;
+
+	case USBAT_DEV_FLASH:
 		us->transport = usbat_flash_transport;
+		break;
+	}
 
 	return 0;
 }
···
 /*
  * Initialize the USBAT processor and the storage device
  */
-int init_usbat(struct us_data *us)
+static int init_usbat(struct us_data *us, int devicetype)
 {
 	int rc;
 	struct usbat_info *info;
···
 	US_DEBUGP("INIT 9\n");
 
 	/* At this point, we need to detect which device we are using */
-	if (usbat_set_transport(us, info))
+	if (usbat_set_transport(us, info, devicetype))
 		return USB_STOR_TRANSPORT_ERROR;
 
 	US_DEBUGP("INIT 10\n");
···
 	return USB_STOR_TRANSPORT_FAILED;
 }
 
+int init_usbat_cd(struct us_data *us)
+{
+	return init_usbat(us, USBAT_DEV_HP8200);
+}
+
+
+int init_usbat_flash(struct us_data *us)
+{
+	return init_usbat(us, USBAT_DEV_FLASH);
+}
+
+int init_usbat_probe(struct us_data *us)
+{
+	return init_usbat(us, 0);
+}
+
 /*
  * Default transport function. Attempts to detect which transport function
  * should be called, makes it the new default, and calls it.
···
 {
 	struct usbat_info *info = (struct usbat_info*) (us->extra);
 
-	if (usbat_set_transport(us, info))
+	if (usbat_set_transport(us, info, 0))
 		return USB_STOR_TRANSPORT_ERROR;
 
 	return us->transport(srb, us);	
 }
-

drivers/usb/storage/shuttle_usbat.h

···
 #define USBAT_FEAT_ET2	0x01
 
 extern int usbat_transport(struct scsi_cmnd *srb, struct us_data *us);
-extern int init_usbat(struct us_data *us);
+extern int init_usbat_cd(struct us_data *us);
+extern int init_usbat_flash(struct us_data *us);
+extern int init_usbat_probe(struct us_data *us);
 
 struct usbat_info {
 	int devicetype;

drivers/usb/storage/unusual_devs.h

···
 UNUSUAL_DEV(  0x03f0, 0x0207, 0x0001, 0x0001, 
 		"HP",
 		"CD-Writer+ 8200e",
-		US_SC_8070, US_PR_USBAT, init_usbat, 0),
+		US_SC_8070, US_PR_USBAT, init_usbat_cd, 0),
 
 UNUSUAL_DEV(  0x03f0, 0x0307, 0x0001, 0x0001, 
 		"HP",
 		"CD-Writer+ CD-4e",
-		US_SC_8070, US_PR_USBAT, init_usbat, 0),
+		US_SC_8070, US_PR_USBAT, init_usbat_cd, 0),
 #endif
 
 /* Reported by Sebastian Kapfer <[e-mail]>
···
 UNUSUAL_DEV(  0x04e6, 0x1010, 0x0000, 0x9999,
 		"Shuttle/SCM",
 		"USBAT-02",
-		US_SC_SCSI, US_PR_USBAT, init_usbat,
+		US_SC_SCSI, US_PR_USBAT, init_usbat_probe,
 		US_FL_SINGLE_LUN),
 #endif
 
···
 UNUSUAL_DEV(  0x0781, 0x0005, 0x0005, 0x0005,
 		"Sandisk",
 		"ImageMate SDDR-05b",
-		US_SC_SCSI, US_PR_USBAT, init_usbat,
+		US_SC_SCSI, US_PR_USBAT, init_usbat_flash,
 		US_FL_SINGLE_LUN ),
 #endif