From 337fc7e665a20bd0c23da233ffb9e8469d999e72 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Wed, 19 Jul 2017 21:50:00 +0800 Subject: usb: hub: Change USB hub descriptor to match USB 3.0 hubs USB 3.0 hubs have a slightly different hub descriptor than USB 2.0 hubs, with a fixed (rather than variable length) size. Change the host controller drivers that access those last two fields (DeviceRemovable and PortPowerCtrlMask) to use the union. Signed-off-by: Bin Meng Reviewed-by: Simon Glass Reviewed-by: Stefan Roese Tested-by: Stefan Roese --- include/usb.h | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) (limited to 'include/usb.h') diff --git a/include/usb.h b/include/usb.h index 62f051fe53..eb82cc23a8 100644 --- a/include/usb.h +++ b/include/usb.h @@ -546,10 +546,20 @@ struct usb_hub_descriptor { unsigned short wHubCharacteristics; unsigned char bPwrOn2PwrGood; unsigned char bHubContrCurrent; - unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8]; - unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8]; - /* DeviceRemovable and PortPwrCtrlMask want to be variable-length - bitmaps that hold max 255 entries. (bit0 is ignored) */ + /* 2.0 and 3.0 hubs differ here */ + union { + struct { + /* add 1 bit for hub status change; round to bytes */ + __u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8]; + __u8 PortPowerCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8]; + } __attribute__ ((packed)) hs; + + struct { + __u8 bHubHdrDecLat; + __le16 wHubDelay; + __le16 DeviceRemovable; + } __attribute__ ((packed)) ss; + } u; } __attribute__ ((packed)); -- cgit v1.2.3