[U-Boot] [PATCH 09/22] dm: usb: Allow usb host drivers to implement usb_reset_root_port

Hans de Goede
2015-06-17T19:33:52Z

Allow usb uclass host drivers to implement usb_reset_root_port, this is
used by single port usb hosts which do not emulate a hub, such as otg
controllers.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/usb/host/usb-uclass.c | 16 +++++++++++-----
include/usb.h | 5 +++++
2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c
index 8f26e35..afa8655 100644
--- a/drivers/usb/host/usb-uclass.c
+++ b/drivers/usb/host/usb-uclass.c
@@ -128,6 +128,17 @@ int usb_alloc_device(struct usb_device *udev)
return ops->alloc_device(bus, udev);
}

+int usb_reset_root_port(struct usb_device *udev)
+{
+ struct udevice *bus = udev->controller_dev;
+ struct dm_usb_ops *ops = usb_get_ops(bus);
+
+ if (!ops->reset_root_port)
+ return -ENOSYS;
+
+ return ops->reset_root_port(bus, udev);
+}
+
#ifdef CONFIG_DM_DEVICE_REMOVE
int usb_stop(void)
{
@@ -273,11 +284,6 @@ int usb_init(void)
return usb_started ? 0 : -1;
}

-int usb_reset_root_port(struct usb_device *udev)
-{
- return -ENOSYS;
-}
-
static struct usb_device *find_child_devnum(struct udevice *parent, int devnum)
{
struct usb_device *udev;
diff --git a/include/usb.h b/include/usb.h
index 2bb6a06..25f8543 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -705,6 +705,11 @@ struct dm_usb_ops {
* is read). This should be NULL for EHCI, which does not need this.
*/
int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
+
+ /**
+ * reset_root_port() - Reset usb root port
+ */
+ int (*reset_root_port)(struct udevice *bus, struct usb_device *udev);
};

#define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
--
2.4.3