On Sat, Mar 26, 2016 at 06:57:26PM +0200, Svetoslav Neykov wrote:
> I'm trying to use the chipidea driver in device mode on an AR9331 SOC board.
> I've got it mostly working but can't figure out how to enable vbus_active.
> Some details - the system supports both host & device modes, but not OTG.
> The mode is selected at startup and there are no OTG registers exposed. Also
> no ID & VBUS pins are available - vbus is considered active all the time
> (when in device mode).
> Here's the excerpt from the ci_hdrc_platform_data init I've got so far:
>
> ci_pdata.name = "ci_hdrc_ar933x";
> ci_pdata.capoffset = DEF_CAPOFFSET;
> ci_pdata.dr_mode = dr_mode;
> ci_pdata.flags = CI_HDRC_DUAL_ROLE_NOT_OTG;
> ci_pdata.vbus_extcon.edev = ERR_PTR(-ENODEV);
> ci_pdata.id_extcon.edev = ERR_PTR(-ENODEV);
> ci_pdata.itc_setting = 1;
>
> phy = usb_phy_generic_register();
>
> ath79_usb_register("ci_hdrc", -1,
> AR933X_EHCI_BASE, AR933X_EHCI_SIZE,
> ATH79_CPU_IRQ(3),
> &ci_pdata, sizeof(ci_pdata));
>
>
> Browsing the commit history and current code it seems that the way to go is
> registering a (simulated) vbus_extcon device with ci_handle_vbus_change then
> making the switch. It doesn't work for this particular system because it
> doesn't have OTG registers and ci->is_otg is false. Any pointers how to set
> vbus_active appreciated. It used to work around 3.11, but the code changed
> considerably since then.
Hi Svetoslav,
Current vbus/id handler does not consider your case, do you use extcon for
vbus detection? If not, how do you plan to handle disconnection? And the USB
certification test will fail if dp is always on?
I will re-design it, and keep you on cc.
--
Best Regards,
Peter Chen
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