target/linux/generic/backport-5.15/821-v5.16-Bluetooth-btusb-Support-public-address-configuration.patch

   1 From 5cb03751455c299b1bf10cb48631bf359cfb11b5 Mon Sep 17 00:00:00 2001
   2 From: "mark-yw.chen" <mark-yw.chen@mediatek.com>
   3 Date: Wed, 1 Sep 2021 11:32:25 +0800
   4 Subject: [PATCH 1/5] Bluetooth: btusb: Support public address configuration
   5  for MediaTek Chip.
   6
   7 The MediaTek chip support vendor specific HCI command(0xfc1a) to
   8 change the public address. Add hdev->set_bdaddr handler for MediaTek
   9 Chip. After doing a power cycle or MediaTek Bluetooth reset, BD_ADDR
  10 will bring back the original one.
  11
  12 Signed-off-by: mark-yw.chen <mark-yw.chen@mediatek.com>
  13 Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
  14 ---
  15  drivers/bluetooth/btusb.c | 18 ++++++++++++++++++
  16  1 file changed, 18 insertions(+)
  17
  18 --- a/drivers/bluetooth/btusb.c
  19 +++ b/drivers/bluetooth/btusb.c
  20 @@ -2268,6 +2268,23 @@ struct btmtk_section_map {
  21         };
  22  } __packed;
  23
  24 +static int btusb_set_bdaddr_mtk(struct hci_dev *hdev, const bdaddr_t *bdaddr)
  25 +{
  26 +       struct sk_buff *skb;
  27 +       long ret;
  28 +
  29 +       skb = __hci_cmd_sync(hdev, 0xfc1a, sizeof(bdaddr), bdaddr, HCI_INIT_TIMEOUT);
  30 +       if (IS_ERR(skb)) {
  31 +               ret = PTR_ERR(skb);
  32 +               bt_dev_err(hdev, "changing Mediatek device address failed (%ld)",
  33 +                          ret);
  34 +               return ret;
  35 +       }
  36 +       kfree_skb(skb);
  37 +
  38 +       return 0;
  39 +}
  40 +
  41  static void btusb_mtk_wmt_recv(struct urb *urb)
  42  {
  43         struct hci_dev *hdev = urb->context;
  44 @@ -3919,6 +3936,7 @@ static int btusb_probe(struct usb_interf
  45                 hdev->shutdown = btusb_mtk_shutdown;
  46                 hdev->manufacturer = 70;
  47                 hdev->cmd_timeout = btusb_mtk_cmd_timeout;
  48 +               hdev->set_bdaddr = btusb_set_bdaddr_mtk;
  49                 set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
  50                 data->recv_acl = btusb_recv_acl_mtk;
  51         }