> -----Original Message----- > From: Felipe Balbi [mailto:balbi@xxxxxx] > Sent: Thursday, August 25, 2011 1:36 PM > To: Sarah Sharp > Cc: Felipe Balbi; Greg KH; Linux USB Mailing List; Linux OMAP Mailing List; Paul Zimmerman > Subject: Re: [PATCH 3/4] usb: Introduce DesignWare USB3 DRD Driver > > Hi, > > On Thu, Aug 25, 2011 at 12:15:09PM -0700, Sarah Sharp wrote: > > On Fri, Aug 19, 2011 at 06:10:58PM +0300, Felipe Balbi wrote: > > > +enum dwc3_link_state { > > > + /* In SuperSpeed */ > > > + DWC3_LINK_STATE_U0 = 0x00, /* in HS, means ON */ > > > + DWC3_LINK_STATE_U1 = 0x01, > > > + DWC3_LINK_STATE_U2 = 0x02, /* in HS, means SLEEP */ > > > + DWC3_LINK_STATE_U3 = 0x03, /* in HS, means SUSPEND */ > > > + DWC3_LINK_STATE_SS_DIS = 0x04, > > > + DWC3_LINK_STATE_RX_DET = 0x05, /* in HS, means Early Suspend */ > > > + DWC3_LINK_STATE_SS_INACT = 0x06, > > > + DWC3_LINK_STATE_POLL = 0x07, > > > + DWC3_LINK_STATE_RECOV = 0x08, > > > + DWC3_LINK_STATE_HRESET = 0x09, > > > + DWC3_LINK_STATE_CMPLY = 0x0a, > > > + DWC3_LINK_STATE_LPBK = 0x0b, > > > + DWC3_LINK_STATE_MASK = 0x0f, > > > +}; > > > > AFAICT, the link state values are exactly the same as the xHCI link > > state values in the Port Link State field in the PORTSC register. Is > > the gadget side (xDCI side) meant to be somewhat compatible with the > > xHCI host controller spec? > > I guess Synopsys would be best to answer this question. Paul, do you > happen to know the answer ? > > > Would it make sense to share these link state macros (and any other > > similar #defines) with the xHCI driver? We could move them into > > include/linux/ch11.h. > > I'm not sure it makes sense to make gadget side use ch11 definitions, > but we could move them to some other common header, maybe ? Our USB3 core is a dual-role device, and some of the logic is shared between xHCI mode and Device mode. So it's not a coincidence that the link state values are the same. However, in future the device mode will have additional states beyond those defined for xHCI. So a completely common header file is not possible, unless people don't mind having Synopsys-specific defines inside it. -- Paul ��.n��������+%������w��{.n�����{�������ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
