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dm: usb: Allow usb host drivers to implement usb_reset_root_port 

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>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Hans de Goede 2015-06-17 21:33:52 +02:00 committed by Simon Glass
parent 9b510df703
commit b2f219b081
2 changed files with 16 additions and 5 deletions
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16
drivers/usb/host/usb-uclass.c
View File

@ -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);
}
int usb_stop(void)
{
struct udevice *bus;
@ -268,11 +279,6 @@ 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;

5
include/usb.h
View File

@ -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)