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dm: usb: Allow setting up a USB controller as a device/gadget 

Some controllers support OTG (on-the-go) where they can operate as either
host or device. The gadget layer in U-Boot supports this.

While this layer does not interact with driver model, we can provide a
function which sets up the controller in the correct way. This way the code
at least builds (although it likely will not work).

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Simon Glass 2015-03-25 12:22:32 -06:00
parent 449230f031
commit fbeceb2602
2 changed files with 28 additions and 0 deletions
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4
drivers/usb/gadget/ci_udc.c
View File

@ -883,7 +883,11 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
if (driver->speed != USB_SPEED_FULL && driver->speed != USB_SPEED_HIGH)
return -EINVAL;
#ifdef CONFIG_DM_USB
ret = usb_setup_ehci_gadget(&controller.ctrl);
#else
ret = usb_lowlevel_init(0, USB_INIT_DEVICE, (void **)&controller.ctrl);
#endif
if (ret)
return ret;

24
drivers/usb/host/usb-uclass.c
View File

@ -249,6 +249,30 @@ int usb_legacy_port_reset(struct usb_device *parent, int portnr)
return usb_port_reset(parent, portnr);
}
int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp)
{
struct usb_platdata *plat;
struct udevice *dev;
int ret;
/* Find the old device and remove it */
ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
if (ret)
return ret;
ret = device_remove(dev);
if (ret)
return ret;
plat = dev_get_platdata(dev);
plat->init_type = USB_INIT_DEVICE;
ret = device_probe(dev);
if (ret)
return ret;
*ctlrp = dev_get_priv(dev);
return 0;
}
/* returns 0 if no match, 1 if match */
int usb_match_device(const struct usb_device_descriptor *desc,
const struct usb_device_id *id)