On Fri, Feb 12, 2016 at 04:40:12PM +0200, Mathias Nyman wrote:
> USB3.1 specifies a SuperSpeedPlus Isoc endpoint companion descriptor
> which is returned as part of the devices complete configuration
> descriptor.
>
> It contains number of bytes per service interval which is needed when
> reserving bus time in the schedule for transfers over 48K bytes per
> service interval.
>
> If bmAttributes bit 7 is set in the old SuperSpeed Endpoint Companion
> descriptor, it will be ollowed by the new SuperSpeedPlus Isoc Endpoint
> Companion descriptor.
>
> Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
> ---
> include/uapi/linux/usb/ch9.h | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/include/uapi/linux/usb/ch9.h b/include/uapi/linux/usb/ch9.h
> index 779a62a..a65f1f3 100644
> --- a/include/uapi/linux/usb/ch9.h
> +++ b/include/uapi/linux/usb/ch9.h
> @@ -234,6 +234,8 @@ struct usb_ctrlrequest {
> #define USB_DT_PIPE_USAGE 0x24
> /* From the USB 3.0 spec */
> #define USB_DT_SS_ENDPOINT_COMP 0x30
> +/* From the USB 3.1 spec */
> +#define USB_DT_SSP_ISOC_ENDPOINT_COMP 0x31
>
> /* Conventional codes for class-specific descriptors. The convention is
> * defined in the USB "Common Class" Spec (3.11). Individual class specs
> @@ -613,6 +615,20 @@ static inline int usb_endpoint_interrupt_type(
>
> /*-------------------------------------------------------------------------*/
>
> +/* USB_DT_SSP_ISOC_ENDPOINT_COMP: SuperSpeedPlus Isochronous Endpoint Companion
> + * descriptor
> + */
> +struct usb_ssp_isoc_ep_comp_descriptor {
> + __u8 bLength;
> + __u8 bDescriptorType;
> + __le16 wReseved;
> + __le32 dwBytesPerInterval;
> +} __attribute__ ((packed));
> +
> +#define USB_DT_SSP_ISOC_EP_COMP_SIZE 8
> +
> +/*-------------------------------------------------------------------------*/
> +
> /* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
> struct usb_ss_ep_comp_descriptor {
> __u8 bLength;
> @@ -646,6 +662,8 @@ usb_ss_max_streams(const struct usb_ss_ep_comp_descriptor *comp)
>
> /* Bits 1:0 of bmAttributes if this is an isoc endpoint */
> #define USB_SS_MULT(p) (1 + ((p) & 0x3))
> +/* Bit 7 of bmAttributes if a SSP isoc endpoint companion descriptor exists */
> +#define USB_SS_SSP_ISOC_COMP(p) ((p) & (1 << 7))
BIT(7)?
Saves me the time of having someone do a coding style patch later on...
thanks,
greg k-h
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