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author | Hans de Goede <hdegoede@redhat.com> | 2015-05-10 14:10:18 +0200 |
---|---|---|
committer | Simon Glass <sjg@chromium.org> | 2015-05-14 18:49:31 -0600 |
commit | 8a5f0665da6701f06443ae989e9c0962807a1249 (patch) | |
tree | 9807fc7c3ca01db39343ddff7a12e52632efa630 /drivers/usb/host/usb-uclass.c | |
parent | 029fd8ea1fffe70bf0d2dab4c64cffa20bf3f62e (diff) | |
download | u-boot-8a5f0665da6701f06443ae989e9c0962807a1249.tar.gz u-boot-8a5f0665da6701f06443ae989e9c0962807a1249.tar.xz u-boot-8a5f0665da6701f06443ae989e9c0962807a1249.zip |
dm: usb: Add support for interrupt queues to the dm usb code
Interrupt endpoints typically are polled for a long time by the usb
controller before they return anything, so calls to submit_int_msg() can
take a long time to complete this.
To avoid this the u-boot code has the an interrupt queue mechanism / API,
add support for this to the driver-model usb code and implement it for the
dm ehci code.
See the added doc comments for more details.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/usb/host/usb-uclass.c')
-rw-r--r-- | drivers/usb/host/usb-uclass.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c index c5ece58407..9ee25ed848 100644 --- a/drivers/usb/host/usb-uclass.c +++ b/drivers/usb/host/usb-uclass.c @@ -65,6 +65,42 @@ int submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer, return ops->bulk(bus, udev, pipe, buffer, length); } +struct int_queue *create_int_queue(struct usb_device *udev, + unsigned long pipe, int queuesize, int elementsize, + void *buffer, int interval) +{ + struct udevice *bus = udev->controller_dev; + struct dm_usb_ops *ops = usb_get_ops(bus); + + if (!ops->create_int_queue) + return NULL; + + return ops->create_int_queue(bus, udev, pipe, queuesize, elementsize, + buffer, interval); +} + +void *poll_int_queue(struct usb_device *udev, struct int_queue *queue) +{ + struct udevice *bus = udev->controller_dev; + struct dm_usb_ops *ops = usb_get_ops(bus); + + if (!ops->poll_int_queue) + return NULL; + + return ops->poll_int_queue(bus, udev, queue); +} + +int destroy_int_queue(struct usb_device *udev, struct int_queue *queue) +{ + struct udevice *bus = udev->controller_dev; + struct dm_usb_ops *ops = usb_get_ops(bus); + + if (!ops->destroy_int_queue) + return -ENOSYS; + + return ops->destroy_int_queue(bus, udev, queue); +} + int usb_alloc_device(struct usb_device *udev) { struct udevice *bus = udev->controller_dev; |