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Bluetooth: Add suspend/resume support to btusb driver 

During suspend it is important that all URBs are cancelled and then on
resume re-submitted. This gives initial suspend/resume support.

Based on initial work from Oliver Neukum <oneukum@suse.de>

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
hifive-unleashed-5.1
Marcel Holtmann 2008-11-30 12:17:14 +01:00
parent a780efa812
commit 6a88adf2ad
1 changed files with 62 additions and 0 deletions
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62
drivers/bluetooth/btusb.c
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@ -198,6 +198,7 @@ struct btusb_data {
struct usb_endpoint_descriptor *isoc_rx_ep;
int isoc_altsetting;
int suspend_count;
};
static void btusb_intr_complete(struct urb *urb)
@ -948,10 +949,71 @@ static void btusb_disconnect(struct usb_interface *intf)
hci_free_dev(hdev);
}
static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
{
struct btusb_data *data = usb_get_intfdata(intf);
BT_DBG("intf %p", intf);
if (data->suspend_count++)
return 0;
cancel_work_sync(&data->work);
usb_kill_anchored_urbs(&data->tx_anchor);
usb_kill_anchored_urbs(&data->isoc_anchor);
usb_kill_anchored_urbs(&data->bulk_anchor);
usb_kill_anchored_urbs(&data->intr_anchor);
return 0;
}
static int btusb_resume(struct usb_interface *intf)
{
struct btusb_data *data = usb_get_intfdata(intf);
struct hci_dev *hdev = data->hdev;
int err;
BT_DBG("intf %p", intf);
if (--data->suspend_count)
return 0;
if (!test_bit(HCI_RUNNING, &hdev->flags))
return 0;
if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
err = btusb_submit_intr_urb(hdev, GFP_NOIO);
if (err < 0) {
clear_bit(BTUSB_INTR_RUNNING, &data->flags);
return err;
}
}
if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
if (btusb_submit_bulk_urb(hdev, GFP_NOIO) < 0)
clear_bit(BTUSB_BULK_RUNNING, &data->flags);
else
btusb_submit_bulk_urb(hdev, GFP_NOIO);
}
if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
else
btusb_submit_isoc_urb(hdev, GFP_NOIO);
}
return 0;
}
static struct usb_driver btusb_driver = {
.name = "btusb",
.probe = btusb_probe,
.disconnect = btusb_disconnect,
.suspend = btusb_suspend,
.resume = btusb_resume,
.id_table = btusb_table,
};