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>
---
Changes since v1:
- fixed coding style issues mentioned by Sergei
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 22d37d8..45cce45 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1076,6 +1076,9 @@ static int ep_enable(struct usb_ep *ep,
int retval = 0;
unsigned long flags;
+ unsigned short max;
+ unsigned char mult = 0;
+
if (ep == NULL || desc == NULL)
return -EINVAL;
@@ -1093,6 +1096,7 @@ 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);
@@ -1100,8 +1104,12 @@ 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 &= 0x7ff; /* bit 0~10 */
+ mEp->qh.ptr->cap |= mult << 30;
+ }
else
mEp->qh.ptr->cap &= ~QH_ZLT;
--
1.7.10.4
--
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