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 <s...@chromium.org>
Signed-off-by: Jagan Teki <ja...@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.
Changes for v2:
- none
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)
--
2.17.1
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