Commit f6451257 authored by Sean Wang's avatar Sean Wang Committed by Marcel Holtmann
Browse files

Bluetooth: btusb: fix up firmware download sequence 



Data RAM on the device have to be powered on before starting to download
the firmware.

Fixes: a1c49c43 ("Bluetooth: btusb: Add protocol support for MediaTek MT7668U USB devices")
Co-developed-by: default avatarMark Chen <Mark-YW.Chen@mediatek.com>
Signed-off-by: default avatarMark Chen <Mark-YW.Chen@mediatek.com>
Signed-off-by: default avatarSean Wang <sean.wang@mediatek.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent f9c70bdc

drivers/bluetooth/btusb.c

+15 −1
Original line number Diff line number Diff line
@@ -2934,7 +2934,7 @@ static int btusb_mtk_setup_firmware(struct hci_dev *hdev, const char *fwname) 
	const u8 *fw_ptr;

	size_t fw_size;

	int err, dlen;

	u8 flag;

	u8 flag, param;



	err = request_firmware(&fw, fwname, &hdev->dev);

	if (err < 0) {
@@ -2942,6 +2942,20 @@ static int btusb_mtk_setup_firmware(struct hci_dev *hdev, const char *fwname) 
		return err;

	}



	/* Power on data RAM the firmware relies on. */

	param = 1;

	wmt_params.op = BTMTK_WMT_FUNC_CTRL;

	wmt_params.flag = 3;

	wmt_params.dlen = sizeof(param);

	wmt_params.data = &param;

	wmt_params.status = NULL;



	err = btusb_mtk_hci_wmt_sync(hdev, &wmt_params);

	if (err < 0) {

		bt_dev_err(hdev, "Failed to power on data RAM (%d)", err);

		return err;

	}



	fw_ptr = fw->data;

	fw_size = fw->size;