Peter Barada wrote: > I'm running into a problem where the MUSB controller stops talking with > the hardwired device on the other end, and I wasn to unload the musb as > a module and reload it to the connection working again. > > I can compile MSUB as a module, but when I load it the 2nd time it > complains with: > > OMAP-35x# modprobe musb_hdrc > musb_hdrc: version 6.0, pio, otg (peripheral+host), debug=0 > musb_core_init 1421: reconfigure software for static FIFOs > musb_hdrc musb_hdrc: musb_init_controller failed with status -19 > > This is due to the platform device wanting dynamic fifo sizing but the > CONFIGDATA register has DYNFIFO bit cleared. Looking through the TRM, I > can't find informaiton on how the MUSB controller changes the state of > DYNFIFO - I'm guessing once any of the dynamic registers are written to > that the controller switches to Dynamic Fifo sizing. This patch from Ajay (already in mainline) should fix it for you. <http://marc.info/?l=linux-usb&m=124881724122257&w=2> The problem is not that the CONFIGDATA changes, but that we attempt to read from CONFIGDATA without having set the INDEX register to 0. CONFIGDATA is a read-only register. - Anand > > The code that aborts is: > > if (reg & MUSB_CONFIGDATA_DYNFIFO) { > if (musb->config->dyn_fifo) > status = ep_config_from_table(musb); > else { > ERR("reconfigure software for Dynamic FIFOs\n"); > status = -ENODEV; > } > } else { > if (!musb->config->dyn_fifo) > status = ep_config_from_hw(musb); > else { > ERR("reconfigure software for static FIFOs\n"); > return -ENODEV; > } > } > > 1) How can one change from dynamic to static fifo sizing in the MUSB? > > 2) Would it be safe to program for dynamic fifo sizing if CONFIG_DATA > indicates the fifos are Statically sized? > > > -- > Peter Barada <peterb@xxxxxxxxxxx> > Logic Product Development, Inc. > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
