Re: [PATCH 0/5] usb: musb: am335x support

[Daniel Mack <zonque@gmail.com>]

Hi Peter,

On 03.03.2013 23:24, Peter Korsgaard wrote:
>>>>>> "Daniel" == Daniel Mack <zonque@gmail.com> writes:
> 
> Hi,
> 
>  Daniel> On my board, the USB is purely used as host interface, with a
>  Daniel> type B plug soldered. In the DT, I'm using the following
>  Daniel> sniplet in accordance to the documentation of the bindings:
> 
>  Daniel> 	usb_otg_hs: usb@47400000 {
>  Daniel> 		compatible = "ti,musb-am33xx";
>  Daniel> 		reg = <0x47400000 0x1000	/* usbss */
>  Daniel> 		       0x47401000 0x800		/* musb instance 0 */
>  Daniel> 		       0x47401800 0x800>;	/* musb instance 1 */
>  Daniel> 		interrupt-parent = <&intc>;
>  Daniel> 		interrupts = <17		/* usbss */
>  Daniel> 			      18		/* musb instance 0 */
>  19> ;		/* musb instance 1 */
>  Daniel> 		multipoint = <1>;
>  Daniel> 		num-eps = <16>;
>  Daniel> 		ram-bits = <12>;
>  Daniel> 		port0-mode = <3>;
>  Daniel> 		port1-mode = <3>;
>  Daniel> 		power = <250>;
>  Daniel> 		ti,hwmods = "usb_otg_hs";
>  Daniel> 	};
> 
>  Daniel> The relevant config options are
> 
>  Daniel> CONFIG_USB_MUSB_HDRC=y
>  Daniel> # CONFIG_USB_MUSB_TUSB6010 is not set
>  Daniel> # CONFIG_USB_MUSB_OMAP2PLUS is not set
>  Daniel> # CONFIG_USB_MUSB_AM35X is not set
>  Daniel> CONFIG_USB_MUSB_DSPS=y
>  Daniel> CONFIG_MUSB_PIO_ONLY=y
>  Daniel> CONFIG_USB_GADGET=y
>  Daniel> CONFIG_USB_GADGET_DEBUG=y
>  Daniel> CONFIG_USB_GADGET_DEBUG_FILES=y
>  Daniel> CONFIG_USB_GADGET_DEBUG_FS=y
>  Daniel> CONFIG_USB_GADGET_VBUS_DRAW=2
>  Daniel> CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS=2
>  Daniel> CONFIG_USB_GADGET_MUSB_HDRC=y
> 
> Ehh, I'm confused here. You talk about host mode, a single 'B' (gadget)
> connector

I'm sorry for the confusion caused. This is a stupid mistake - I'm in
fact talking about an 'A' type plug of course (host mode).

> and your device tree mentions 2 OTG ports.

That's what I said in a follow up - the same happens for mode '1'.

> What is the configuration exactly?

Again to summarize: host-only mode, type 'A' plug.

The gadget driver is is enabled in the config because the only
occurrence of usb_add_hcd() in the musb driver is in the gagdget part,
so supposedly, there has to be a gadget driver loaded in order to make
the host interface going.


Thanks,
Daniel