Disk -> probably, though you should check (isolate or cut the V+ VBUS wire (red)) and connect to any normal working host.
selfpowered hub, quite sure will work. Most don't care about upstream VBUS aiui. Speedevil should know better details.


On a different topic: To me it seems like we are using the http://mxr.maemo.org/fremantle/sourc...usb/omap2430.c for N900?
In there are a number of *very* interesting details, e.g
209 #ifdef CONFIG_USB_MUSB_HDRC_HCD
210 case MUSB_HOST:
are our kernels compiled with CONFIG_USB_MUSB_HDRC_HCD ?

and
155 static void omap_set_vbus(struct musb *musb, int is_on)
156 {
157 u8 devctl;
158 /* HDRC controls CPEN, but beware current surges during device
This clearly refers to CPEN ChargePumpENable of any PHY chip. Won't work, as we need to talk to bme instead

even
151 static void omap_vbus_power(struct musb *musb, int is_on, int sleeping)
152 {
153 }
AIUI here we need to kick on bq24150 boostmode, by whatever means


272 if (is_host_enabled(musb))
273 musb->board_set_vbus = omap_set_vbus;

also interesting the lines
418 /* Recover OTG control */
419 r = musb_ulpi_readb(musb->mregs, ISP1704_OTG_CTRL);
...426
containing ISP1704 references. See e.g. http://mxr.maemo.org/fremantle/ident?i=ISP1704_OTG_CTRL