Bluetooth: Replace constant hw_variant from Intel Bluetooth firmware filename

BugLink: http://bugs.launchpad.net/bugs/1705633

The format of Intel Bluetooth firmware filename for bootloader product
is ibt-<hw_variant>-<device_revision_id>.sfi

Currently the driver uses a constant value 11 (0x0b) for hw_variant
to support LnP/SfP product. But new product like WsP product has
a different value such as 12 (0x0c).

To support the multiple products, this patch replaces the constant
value of hw_variant to the actual hw_variant value read from
the device.
Signed-off-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
(cherry picked from commit 230b04ac)
Signed-off-by: AceLan Kao <acelan.kao@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Aaron Ma <aaron.ma@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

drivers/bluetooth/btusb.c

@@ -2141,10 +2141,14 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
 	/* With this Intel bootloader only the hardware variant and device
 	 * revision information are used to select the right firmware.
 	 *
-	 * Currently this bootloader support is limited to hardware variant
-	 * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
+	 * The firmware filename is ibt-<hw_variant>-<dev_revid>.sfi.
+	 *
+	 * Currently the supported hardware variants are:
+	 *   11 (0x0b) for iBT3.0 (LnP/SfP)
+	 *   12 (0x0c) for iBT3.5 (WsP)
 	 */
-	snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
+	snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.sfi",
+		 le16_to_cpu(ver.hw_variant),
 		 le16_to_cpu(params->dev_revid));
 
 	err = request_firmware(&fw, fwname, &hdev->dev);
@@ -2160,7 +2164,8 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
 	/* Save the DDC file name for later use to apply once the firmware
 	 * downloading is done.
 	 */
-	snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc",
+	snprintf(fwname, sizeof(fwname), "intel/ibt-%u-%u.ddc",
+		 le16_to_cpu(ver.hw_variant),
 		 le16_to_cpu(params->dev_revid));
 
 	kfree_skb(skb);