diff mbox series

[5.8,170/464] Bluetooth: btusb: fix up firmware download sequence

Message ID 20200817143841.964263701@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Aug. 17, 2020, 3:12 p.m. UTC 
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 mbox series

Patch

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 5f022e9cf667e..61ffe185e0e49 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2925,7 +2925,7 @@  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) {
@@ -2933,6 +2933,20 @@  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;