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

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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: Tim Jiang <tjiang@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
tjiang@codeaurora.org 2021-09-16 16:41:06 +08:00 committed by Marcel Holtmann
parent 037ce005af
commit 24ff62ae38
1 changed files with 22 additions and 0 deletions
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22
drivers/bluetooth/btusb.c
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@ -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);