found on ulpi erata

Depending on the application, the link should enable or disable the appropriate Vbus interrupts. Example
settings for typical applications are given in Table
Application VbusValid(*) SessValid SessEnd
Standard Host Yes No No
Standard Peripheral No Yes No
OTG A-Device Yes Yes No
OTG B-Device No Yes Yes
Table – Vbus indicators in the RXCMD required for typical applications
* The VbusValid indicator in the RXCMD comes from either the internal VbusValid comparator, or the external Vbus
indicator

and for shure 1707 pin layout seem to be a standard
another chip found ( without charger detection )
http://www.st.com/stonline/products/.../stulpi01a.pdf

tusb6010.c
957 if (!(musb_readl(tbase, TUSB_DEV_OTG_STAT)
958 & TUSB_DEV_OTG_STAT_ID_STATUS))
959 musb_writel(tbase, TUSB_INT_SRC_SET,
960 TUSB_INT_SRC_ID_STATUS_CHNG);

funny but not for n900