On Wed, May 27, 2015 at 07:50:01PM +0800, Li Jun wrote:
> From: Macpaul Lin <macpaul@xxxxxxxxx>
>
> Add CONFIG_USB_OTG_VERSION to identify the OTG and EH supplement release number
> with which the OTG device is compliant, also update the usb_otg_descriptor for
> OTG 2.0 and later release to include this OTG version number.
>
> Signed-off-by: Macpaul Lin <macpaul@xxxxxxxxx>
> Signed-off-by: Li Jun <jun.li@xxxxxxxxxxxxx>
> ---
> drivers/usb/core/Kconfig | 11 +++++++++++
> include/uapi/linux/usb/ch9.h | 7 ++++++-
> 2 files changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
> index cc0ced0..566a6c6 100644
> --- a/drivers/usb/core/Kconfig
> +++ b/drivers/usb/core/Kconfig
> @@ -55,6 +55,17 @@ config USB_OTG
> Select this only if your board has Mini-AB/Micro-AB
> connector.
>
> +config USB_OTG_VERSION
> + int "OTG and EH supplement release version number"
> + depends on USB_OTG
> + default 13
> + range 0 30
> + help
> + OTG and EH supplement release number(e.g. 13 is for OTG 1.3, 20 is
> + for OTG 2.0). This field will be converted to be bcdOTG in binary-coded
> + decimal of otg descriptor and identifies the release of the OTG and EH
> + supplement with which the device and its descriptors are compliant.
> +
Hi Jun,
Per previous discussion, in order to support multi-platform, we should
not use Kconfig entry for different otg versions, instead we
need to define several otg descriptor definitions, and choose one of
them according to platform parameters.
> config USB_OTG_WHITELIST
> bool "Rely on OTG and EH Targeted Peripherals List"
> depends on USB
> diff --git a/include/uapi/linux/usb/ch9.h b/include/uapi/linux/usb/ch9.h
> index aa33fd1..67204f1 100644
> --- a/include/uapi/linux/usb/ch9.h
> +++ b/include/uapi/linux/usb/ch9.h
> @@ -666,12 +666,17 @@ struct usb_qualifier_descriptor {
>
> /*-------------------------------------------------------------------------*/
>
> -/* USB_DT_OTG (from OTG 1.0a supplement) */
> +/* USB_DT_OTG */
> struct usb_otg_descriptor {
> __u8 bLength;
> __u8 bDescriptorType;
>
> __u8 bmAttributes; /* support for HNP, SRP, etc */
> +#ifdef CONFIG_USB_OTG_VERSION
> +#if CONFIG_USB_OTG_VERSION >= 20
> + __le16 bcdOTG; /* USB OTG version number */
> +#endif
> +#endif
> } __attribute__ ((packed));
>
> /* from usb_otg_descriptor.bmAttributes */
> --
> 1.9.1
>
--
Best Regards,
Peter Chen
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