linux-kernel - [PATCH v5 3/3] Bluetooth: btusb: Indicate Microsoft vendor extension for Intel 9160/9260

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Date:   Fri,  3 Apr 2020 20:31:18 -0700
From:   Miao-chen Chou <mcchou@...omium.org>
To:     Bluetooth Kernel Mailing List <linux-bluetooth@...r.kernel.org>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Alain Michaud <alainm@...omium.org>,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        Miao-chen Chou <mcchou@...omium.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v5 3/3] Bluetooth: btusb: Indicate Microsoft vendor extension for Intel 9160/9260

This adds a bit mask of driver_info for Microsoft vendor extension and
indicates the support for Intel 9160/9260. This was verified with Intel
ThunderPeak BT controller where msft_opcode is 0xFC1E.

Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Miao-chen Chou <mcchou@...omium.org>
---

Changes in v5:
- Extract the changes on btusb as a different commit.

Changes in v4:
- Introduce CONFIG_BT_MSFTEXT as a starting point of providing a
framework to use Microsoft extension
- Create include/net/bluetooth/msft.h and net/bluetooth/msft.c to
facilitate functions of Microsoft extension.

Changes in v3:
- Create net/bluetooth/msft.c with struct msft_vnd_ext defined internally
and change the hdev->msft_ext field to void*.
- Define and expose msft_vnd_ext_set_opcode() for btusb use.
- Init hdev->msft_ext in hci_alloc_dev() and deinit it in hci_free_dev().

Changes in v2:
- Define struct msft_vnd_ext and add a field of this type to struct
hci_dev to facilitate the support of Microsoft vendor extension.

 drivers/bluetooth/btusb.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 3bdec42c96123..f73ad18c04559 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -20,6 +20,7 @@
 
 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/msft.h>
 
 #include "btintel.h"
 #include "btbcm.h"
@@ -58,6 +59,7 @@ static struct usb_driver btusb_driver;
 #define BTUSB_CW6622		0x100000
 #define BTUSB_MEDIATEK		0x200000
 #define BTUSB_WIDEBAND_SPEECH	0x400000
+#define BTUSB_MSFT_VND_EXT	0x800000
 
 static const struct usb_device_id btusb_table[] = {
 	/* Generic Bluetooth USB device */
@@ -335,7 +337,8 @@ static const struct usb_device_id blacklist_table[] = {
 
 	/* Intel Bluetooth devices */
 	{ USB_DEVICE(0x8087, 0x0025), .driver_info = BTUSB_INTEL_NEW |
-						     BTUSB_WIDEBAND_SPEECH },
+						     BTUSB_WIDEBAND_SPEECH |
+						     BTUSB_MSFT_VND_EXT },
 	{ USB_DEVICE(0x8087, 0x0026), .driver_info = BTUSB_INTEL_NEW |
 						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x8087, 0x0029), .driver_info = BTUSB_INTEL_NEW |
@@ -3800,6 +3803,12 @@ static int btusb_probe(struct usb_interface *intf,
 		set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
 		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
 		set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
+
+		/* All Intel controllers that support the Microsoft
+		 * vendor extension are using 0xFC1E for VsMsftOpCode.
+		 */
+		if (id->driver_info & BTUSB_MSFT_VND_EXT)
+			msft_set_opcode(hdev, 0xFC1E);
 	}
 
 	if (id->driver_info & BTUSB_MARVELL)
-- 
2.24.1