[PATCH 9/9] usb: chipidea: udc: configure iso endpoints

[Sergei Shtylyov]

Hello.

On 11/14/2012 07:19 PM, Michael Grzeschik wrote:

> The implementation is derived from the fsl_udc_core code in
> fsl_ep_enable and makes basic iso handling possible.

> Signed-off-by: Michael Grzeschik <m.grzeschik at pengutronix.de>
> Signed-off-by: Marc Kleine-Budde <mkl at pengutronix.de>
> ---
>  drivers/usb/chipidea/udc.c |   12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)

> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> index 2999b0d..0bc4308 100644
> --- a/drivers/usb/chipidea/udc.c
> +++ b/drivers/usb/chipidea/udc.c
> @@ -1058,6 +1058,9 @@ static int ep_enable(struct usb_ep *ep,
>  	int retval = 0;
>  	unsigned long flags;
>  
> +	unsigned short max = 0;

   It doesn't look like this initialization is necessary.

> +	unsigned char mult = 0;
> +
>  	if (ep == NULL || desc == NULL)
>  		return -EINVAL;
>  
> @@ -1075,6 +1078,7 @@ static int ep_enable(struct usb_ep *ep,
>  	mEp->type = usb_endpoint_type(desc);
>  
>  	mEp->ep.maxpacket = usb_endpoint_maxp(desc);
> +	max = usb_endpoint_maxp(desc);
>  
>  	dbg_event(_usb_addr(mEp), "ENABLE", 0);
>  
> @@ -1082,8 +1086,12 @@ static int ep_enable(struct usb_ep *ep,
>  
>  	if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
>  		mEp->qh.ptr->cap |=  QH_IOS;
> -	else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
> -		mEp->qh.ptr->cap &= ~QH_MULT;
> +	else if (mEp->type == USB_ENDPOINT_XFER_ISOC) {
> +		/* Calculate transactions needed for high bandwidth iso */
> +		mult = (unsigned char)(1 + ((max >> 11) & 0x03));
> +		max = max & 0x7ff;	/* bit 0~10 */

	max &= 0x7ff;

> +		mEp->qh.ptr->cap |= (mult << 30);

   Parens not needed.

> +	}
>  	else
>  		mEp->qh.ptr->cap &= ~QH_ZLT;
>  
>