diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/usb-uclass.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/drivers/usb/host/usb-uclass.c b/drivers/usb/host/usb-uclass.c index 749257cf6d8..963464cff94 100644 --- a/drivers/usb/host/usb-uclass.c +++ b/drivers/usb/host/usb-uclass.c @@ -21,6 +21,10 @@ DECLARE_GLOBAL_DATA_PTR; extern bool usb_started; /* flag for the started/stopped USB status */ static bool asynch_allowed; +struct usb_uclass_priv { + int companion_device_count; +}; + int usb_disable_asynch(int disable) { int old_value = asynch_allowed; @@ -46,11 +50,22 @@ int submit_control_msg(struct usb_device *udev, unsigned long pipe, { struct udevice *bus = udev->controller_dev; struct dm_usb_ops *ops = usb_get_ops(bus); + struct usb_uclass_priv *uc_priv = bus->uclass->priv; + int err; if (!ops->control) return -ENOSYS; - return ops->control(bus, udev, pipe, buffer, length, setup); + err = ops->control(bus, udev, pipe, buffer, length, setup); + if (setup->request == USB_REQ_SET_FEATURE && + setup->requesttype == USB_RT_PORT && + setup->value == cpu_to_le16(USB_PORT_FEAT_RESET) && + err == -ENXIO) { + /* Device handed over to companion after port reset */ + uc_priv->companion_device_count++; + } + + return err; } int submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer, @@ -117,12 +132,16 @@ int usb_stop(void) { struct udevice *bus; 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, &uc); if (ret) return ret; + + uc_priv = uc->priv; + uclass_foreach_dev(bus, uc) { ret = device_remove(bus); if (ret && !err) @@ -142,6 +161,7 @@ int usb_stop(void) #endif usb_stor_reset(); usb_hub_reset(); + uc_priv->companion_device_count = 0; usb_started = 0; return err; @@ -171,6 +191,7 @@ static void usb_scan_bus(struct udevice *bus, bool recurse) int usb_init(void) { int controllers_initialized = 0; + struct usb_uclass_priv *uc_priv; struct usb_bus_priv *priv; struct udevice *bus; struct uclass *uc; @@ -184,6 +205,8 @@ int usb_init(void) if (ret) return ret; + uc_priv = uc->priv; + uclass_foreach_dev(bus, uc) { /* init low_level USB */ printf("USB%d: ", count); @@ -219,15 +242,17 @@ int usb_init(void) /* * Now that the primary controllers have been scanned and have handed * over any devices they do not understand to their companions, scan - * the companions. + * the companions if necessary. */ - uclass_foreach_dev(bus, uc) { - if (!device_active(bus)) - continue; + if (uc_priv->companion_device_count) { + uclass_foreach_dev(bus, uc) { + if (!device_active(bus)) + continue; - priv = dev_get_uclass_priv(bus); - if (priv->companion) - usb_scan_bus(bus, true); + priv = dev_get_uclass_priv(bus); + if (priv->companion) + usb_scan_bus(bus, true); + } } debug("scan end\n"); @@ -685,6 +710,7 @@ UCLASS_DRIVER(usb) = { .name = "usb", .flags = DM_UC_FLAG_SEQ_ALIAS, .post_bind = usb_post_bind, + .priv_auto_alloc_size = sizeof(struct usb_uclass_priv), .per_child_auto_alloc_size = sizeof(struct usb_device), .per_device_auto_alloc_size = sizeof(struct usb_bus_priv), .child_post_bind = usb_child_post_bind, |