From 3e59f59015e39ceb870fa8a7a12e0464e775512b Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Thu, 7 Sep 2017 06:13:17 -0700 Subject: dm: usb: Add a new USB controller operation 'get_max_xfer_size' The HCD may have limitation on the maximum bytes to be transferred in a USB transfer. USB class driver needs to be aware of this. Signed-off-by: Bin Meng --- drivers/usb/host/usb-uclass.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/usb/host') diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c index 0b8a501ce8..bc44fc3394 100644 --- a/drivers/usb/host/usb-uclass.c +++ b/drivers/usb/host/usb-uclass.c @@ -150,6 +150,17 @@ int usb_update_hub_device(struct usb_device *udev) return ops->update_hub_device(bus, udev); } +int usb_get_max_xfer_size(struct usb_device *udev, size_t *size) +{ + struct udevice *bus = udev->controller_dev; + struct dm_usb_ops *ops = usb_get_ops(bus); + + if (!ops->get_max_xfer_size) + return -ENOSYS; + + return ops->get_max_xfer_size(bus, size); +} + int usb_stop(void) { struct udevice *bus; -- cgit