linux-kernel - [PATCH v1 1/2] Bluetooth: btusb: Indicate Microsoft vendor extension for Intel 9460/9560 and 9160/9260

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Message-Id: <20200323002820.v1.1.I0e975833a6789e8acc74be7756cd54afde6ba98c@changeid>
Date:   Mon, 23 Mar 2020 00:28:23 -0700
From:   Miao-chen Chou <mcchou@...omium.org>
To:     Bluetooth Kernel Mailing List <linux-bluetooth@...r.kernel.org>
Cc:     Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Alain Michaud <alainm@...omium.org>,
        Miao-chen Chou <mcchou@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v1 1/2] Bluetooth: btusb: Indicate Microsoft vendor extension for Intel 9460/9560 and 9160/9260

This adds a bit mask of driver_info for Microsoft vendor extension and
indicates the support for Intel 9460/9560 and 9160/9260. See
https://docs.microsoft.com/en-us/windows-hardware/drivers/bluetooth/
microsoft-defined-bluetooth-hci-commands-and-events for more information
about the extension. This was verified with Intel ThunderPeak BT controller
where msft_vnd_ext_opcode is 0xFC1E.

Signed-off-by: Miao-chen Chou <mcchou@...omium.org>
---

Changes in v1:
- Add a bit mask of driver_info for Microsoft vendor extension.
- Indicates the support of Microsoft vendor extension for Intel
9460/9560 and 9160/9260.
- Add fields to struct hci_dev to facilitate the support of Microsoft
vendor extension.

 drivers/bluetooth/btusb.c        | 18 ++++++++++++++++--
 include/net/bluetooth/hci.h      |  2 ++
 include/net/bluetooth/hci_core.h |  4 ++++
 3 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 3bdec42c9612..5eb27d1c4ac7 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -58,6 +58,7 @@ 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 +336,8 @@ 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 |
@@ -348,7 +350,8 @@ static const struct usb_device_id blacklist_table[] = {
 	{ USB_DEVICE(0x8087, 0x0aa7), .driver_info = BTUSB_INTEL |
 						     BTUSB_WIDEBAND_SPEECH },
 	{ USB_DEVICE(0x8087, 0x0aaa), .driver_info = BTUSB_INTEL_NEW |
-						     BTUSB_WIDEBAND_SPEECH },
+						     BTUSB_WIDEBAND_SPEECH |
+						     BTUSB_MSFT_VND_EXT },
 
 	/* Other Intel Bluetooth devices */
 	{ USB_VENDOR_AND_INTERFACE_INFO(0x8087, 0xe0, 0x01, 0x01),
@@ -3734,6 +3737,11 @@ static int btusb_probe(struct usb_interface *intf,
 	hdev->send   = btusb_send_frame;
 	hdev->notify = btusb_notify;
 
+	hdev->msft_vnd_ext_opcode = HCI_OP_NOP;
+	hdev->msft_vnd_ext_features = 0;
+	hdev->msft_vnd_ext_evt_prefix_len = 0;
+	hdev->msft_vnd_ext_evt_prefix = NULL;
+
 #ifdef CONFIG_PM
 	err = btusb_config_oob_wake(hdev);
 	if (err)
@@ -3800,6 +3808,12 @@ 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);
+
+		if (id->driver_info & BTUSB_MSFT_VND_EXT &&
+			(id->idProduct == 0x0025 || id->idProduct == 0x0aaa)) {
+			hdev->msft_vnd_ext_opcode =
+				hci_opcode_pack(HCI_VND_DEBUG_CMD_OGF, 0x001E);
+		}
 	}
 
 	if (id->driver_info & BTUSB_MARVELL)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 5f60e135aeb6..b85e95454367 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -38,6 +38,8 @@
 
 #define HCI_MAX_CSB_DATA_SIZE	252
 
+#define HCI_VND_DEBUG_CMD_OGF	0x3f
+
 /* HCI dev events */
 #define HCI_DEV_REG			1
 #define HCI_DEV_UNREG			2
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index d4e28773d378..15daf3b2d4f0 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -315,6 +315,10 @@ struct hci_dev {
 	__u8		ssp_debug_mode;
 	__u8		hw_error_code;
 	__u32		clock;
+	__u16		msft_vnd_ext_opcode;
+	__u64		msft_vnd_ext_features;
+	__u8		msft_vnd_ext_evt_prefix_len;
+	void		*msft_vnd_ext_evt_prefix;
 
 	__u16		devid_source;
 	__u16		devid_vendor;
-- 
2.24.1