Some OTG controllers which operates on Peripheral mode are registered as UCLASS_USB_DEV_GENERIC.
So add support to shutdown them as well. shutdown happened during 'usb reset' and U-Boot handoff code for Linux boot.
controller restarting in 'usb reset' like probing again is still missing for this type of UCLASS.
Cc: Simon Glass sjg@chromium.org Signed-off-by: Jagan Teki jagan@amarulasolutions.com --- Note: I tried of traversing for multiple UCLASS in removal code in usb_stop, but couldn't come with proper solutions. I don't think any other area of code need a requirement like this, or may be I'm missing. any help would appreciate.
drivers/usb/host/usb-uclass.c | 43 +++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+)
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c index 611ea97a72..99cf3d2b49 100644 --- a/drivers/usb/host/usb-uclass.c +++ b/drivers/usb/host/usb-uclass.c @@ -158,6 +158,45 @@ int usb_get_max_xfer_size(struct usb_device *udev, size_t *size) return ops->get_max_xfer_size(bus, size); }
+int __usb_stop(void) +{ + struct udevice *bus; + struct udevice *rh; + struct uclass *uc; + struct usb_uclass_priv *uc_priv; + int err = 0, ret; + + /* De-activate any devices that have been activated */ + ret = uclass_get(UCLASS_USB_DEV_GENERIC, &uc); + if (ret) + return ret; + + uc_priv = uc->priv; + + uclass_foreach_dev(bus, uc) { + ret = device_remove(bus, DM_REMOVE_NORMAL); + if (ret && !err) + err = ret; + + /* Locate root hub device */ + device_find_first_child(bus, &rh); + if (rh) { + /* + * All USB devices are children of root hub. + * Unbinding root hub will unbind all of its children. + */ + ret = device_unbind(rh); + if (ret && !err) + err = ret; + } + } + + uc_priv->companion_device_count = 0; + usb_started = 0; + + return err; +} + int usb_stop(void) { struct udevice *bus; @@ -166,6 +205,10 @@ int usb_stop(void) struct usb_uclass_priv *uc_priv; int err = 0, ret;
+ ret = __usb_stop(); + if (ret) + return ret; + /* De-activate any devices that have been activated */ ret = uclass_get(UCLASS_USB, &uc); if (ret)