From 22c6a35d41f71b5b40ba8debcb8bd4e8e291ae43 Mon Sep 17 00:00:00 2001 From: Sarah Sharp Date: Mon, 13 Sep 2010 12:01:02 -0700 Subject: [PATCH] usb: Make USB 3.0 roothub have a SS EP comp descriptor. Make the USB 3.0 roothub registered by the USB core have a SuperSpeed Endpoint Companion Descriptor after the interrupt endpoint. All USB 3.0 devices are required to have this, and the USB 3.0 bus specification (section 10.13.1) says which values the descriptor should have. Signed-off-by: Sarah Sharp --- drivers/usb/core/hcd.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index a97ed6d293e9..93c0b92ae402 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -297,7 +297,7 @@ static const u8 ss_rh_config_descriptor[] = { /* one configuration */ 0x09, /* __u8 bLength; */ 0x02, /* __u8 bDescriptorType; Configuration */ - 0x19, 0x00, /* __le16 wTotalLength; FIXME */ + 0x1f, 0x00, /* __le16 wTotalLength; */ 0x01, /* __u8 bNumInterfaces; (1) */ 0x01, /* __u8 bConfigurationValue; */ 0x00, /* __u8 iConfiguration; */ @@ -327,11 +327,14 @@ static const u8 ss_rh_config_descriptor[] = { /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) * see hub.c:hub_configure() for details. */ (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, - 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ - /* - * All 3.0 hubs should have an endpoint companion descriptor, - * but we're ignoring that for now. FIXME? - */ + 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ + + /* one SuperSpeed endpoint companion descriptor */ + 0x06, /* __u8 ss_bLength */ + 0x30, /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */ + 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ + 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ + 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ }; /*-------------------------------------------------------------------------*/ -- GitLab