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@xxxxxxxxxxxxxx>
> Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
> ---
> 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;
>
>
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