From: Sean Wang sean.wang@mediatek.com
[ Upstream commit f645125711c80f9651e4a57403d799070c6ad13b ]
Data RAM on the device have to be powered on before starting to download the firmware.
Fixes: a1c49c434e15 ("Bluetooth: btusb: Add protocol support for MediaTek MT7668U USB devices") Co-developed-by: Mark Chen Mark-YW.Chen@mediatek.com Signed-off-by: Mark Chen Mark-YW.Chen@mediatek.com Signed-off-by: Sean Wang sean.wang@mediatek.com Signed-off-by: Marcel Holtmann marcel@holtmann.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/bluetooth/btusb.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 3d9313c746f39..4085387f13cfb 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2826,7 +2826,7 @@ 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) { @@ -2834,6 +2834,20 @@ 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 = ¶m; + 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;