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From: <mark-yw.chen@mediatek.com>
To: <marcel@holtmann.org>, <johan.hedberg@gmail.com>
Cc: <chris.lu@mediatek.com>, <linux-bluetooth@vger.kernel.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <michaelfsun@google.com>,
	<mcchou@chromium.org>, mark-yw.chen <mark-yw.chen@mediatek.com>
Subject: [PATCH v2 1/2] Bluetooth: btusb: Support public address configuration for MediaTek Chip.
Date: Wed, 1 Sep 2021 11:32:25 +0800	[thread overview]
Message-ID: <20210901033226.20693-1-mark-yw.chen@mediatek.com> (raw)

From: "mark-yw.chen" <mark-yw.chen@mediatek.com>

The MediaTek chip support vendor specific HCI command(0xfc1a) to
change the public address. Add hdev->set_bdaddr handler for MediaTek
Chip. After doing a power cycle or MediaTek Bluetooth reset, BD_ADDR
will bring back the original one.

Signed-off-by: mark-yw.chen <mark-yw.chen@mediatek.com>
---
 drivers/bluetooth/btusb.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 60d2fce59a71..41e7c9f28d82 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2200,6 +2200,23 @@ struct btmtk_section_map {
 	};
 } __packed;
 
+static int btusb_set_bdaddr_mtk(struct hci_dev *hdev, const bdaddr_t *bdaddr)
+{
+	struct sk_buff *skb;
+	long ret;
+
+	skb = __hci_cmd_sync(hdev, 0xfc1a, sizeof(bdaddr), bdaddr, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		ret = PTR_ERR(skb);
+		bt_dev_err(hdev, "changing Mediatek device address failed (%ld)",
+			   ret);
+		return ret;
+	}
+	kfree_skb(skb);
+
+	return 0;
+}
+
 static void btusb_mtk_wmt_recv(struct urb *urb)
 {
 	struct hci_dev *hdev = urb->context;
@@ -3819,6 +3836,7 @@ static int btusb_probe(struct usb_interface *intf,
 		hdev->shutdown = btusb_mtk_shutdown;
 		hdev->manufacturer = 70;
 		hdev->cmd_timeout = btusb_mtk_cmd_timeout;
+		hdev->set_bdaddr = btusb_set_bdaddr_mtk;
 		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
 		data->recv_acl = btusb_recv_acl_mtk;
 	}
-- 
2.18.0
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             reply	other threads:[~2021-09-01  3:42 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-01  3:32 mark-yw.chen [this message]
2021-09-01  3:32 ` [PATCH v2 2/2] Bluetooth: btusb: Add protocol for MediaTek bluetooth devices(MT7922) mark-yw.chen
2021-09-01  5:38   ` Marcel Holtmann
2021-09-01  5:38     ` Marcel Holtmann
2021-09-01  5:38 ` [PATCH v2 1/2] Bluetooth: btusb: Support public address configuration for MediaTek Chip Marcel Holtmann
2021-09-01  5:38   ` Marcel Holtmann

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