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Bluetooth: btusb: fix up firmware download sequence 

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

Fixes: a1c49c434e ("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>
This commit is contained in:
Sean Wang 2020-06-19 19:52:01 +00:00 committed by Marcel Holtmann
parent f9c70bdc27
commit f645125711
1 changed files with 15 additions and 1 deletions
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16
drivers/bluetooth/btusb.c
View File

@ -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;