diff options
| -rw-r--r-- | common/usb_hub.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/common/usb_hub.c b/common/usb_hub.c index d135526..4fe0daa 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -405,8 +405,15 @@ static int usb_scan_port(struct usb_device_scan *usb_scan) portchange = le16_to_cpu(portsts->wPortChange); debug("Port %d Status %X Change %X\n", i + 1, portstatus, portchange); - /* No connection change happened, wait a bit more. */ - if (!(portchange & USB_PORT_STAT_C_CONNECTION)) { + /* + * No connection change happened, wait a bit more. + * + * For some situation, the hub reports no connection change but a + * device is connected to the port (eg: CCS bit is set but CSC is not + * in the PORTSC register of a root hub), ignore such case. + */ + if (!(portchange & USB_PORT_STAT_C_CONNECTION) && + !(portstatus & USB_PORT_STAT_CONNECTION)) { if (get_timer(0) >= hub->connect_timeout) { debug("devnum=%d port=%d: timeout\n", dev->devnum, i + 1); @@ -418,10 +425,6 @@ static int usb_scan_port(struct usb_device_scan *usb_scan) return 0; } - /* Test if the connection came up, and if not exit */ - if (!(portstatus & USB_PORT_STAT_CONNECTION)) - return 0; - /* A new USB device is ready at this point */ debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1); |