Commit 24ff62ae authored by tjiang@codeaurora.org's avatar tjiang@codeaurora.org Committed by Marcel Holtmann
Browse files

Bluetooth: btusb: Add gpio reset way for qca btsoc in cmd_timeout 



if platform provide gpio connect to BT_EN reset pin of qca btsoc chip,
we can do hardware reset instead of usb port reset.

Signed-off-by: default avatarTim Jiang <tjiang@codeaurora.org>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 037ce005

drivers/bluetooth/btusb.c

+22 −0
Original line number Original line Diff line number Diff line
@@ -657,11 +657,33 @@ static void btusb_rtl_cmd_timeout(struct hci_dev *hdev) 
static void btusb_qca_cmd_timeout(struct hci_dev *hdev)

static void btusb_qca_cmd_timeout(struct hci_dev *hdev)

{

{

	struct btusb_data *data = hci_get_drvdata(hdev);

	struct btusb_data *data = hci_get_drvdata(hdev);

	struct gpio_desc *reset_gpio = data->reset_gpio;

	int err;

	int err;





	if (++data->cmd_timeout_cnt < 5)

	if (++data->cmd_timeout_cnt < 5)

		return;

		return;





	if (reset_gpio) {

		bt_dev_err(hdev, "Reset qca device via bt_en gpio");



		/* Toggle the hard reset line. The qca bt device is going to

		 * yank itself off the USB and then replug. The cleanup is handled

		 * correctly on the way out (standard USB disconnect), and the new

		 * device is detected cleanly and bound to the driver again like

		 * it should be.

		 */

		if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {

			bt_dev_err(hdev, "last reset failed? Not resetting again");

			return;

		}



		gpiod_set_value_cansleep(reset_gpio, 0);

		msleep(200);

		gpiod_set_value_cansleep(reset_gpio, 1);



		return;

	}



	bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");

	bt_dev_err(hdev, "Multiple cmd timeouts seen. Resetting usb device.");

	/* This is not an unbalanced PM reference since the device will reset */

	/* This is not an unbalanced PM reference since the device will reset */

	err = usb_autopm_get_interface(data->intf);

	err = usb_autopm_get_interface(data->intf);