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.grzesc...@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <m...@pengutronix.de>
Reviewed-by: Felipe Balbi <ba...@ti.com>
---
drivers/usb/chipidea/core.c | 2 +-
drivers/usb/chipidea/udc.c | 19 ++++++++++++++++++-
drivers/usb/chipidea/udc.h | 1 +
3 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 450107e..3cdb889 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -43,7 +43,7 @@
*
* TODO List
* - OTG
- * - Isochronous & Interrupt Traffic
+ * - Interrupt Traffic
* - Handle requests which spawns into several TDs
* - GET_STATUS(device) - always reports 0
* - Gadget API (majority of optional features)
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 3d90e61..84f5ec0 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -466,6 +466,13 @@ static int _hardware_enqueue(struct ci13xxx_ep *mEp,
struct ci13xxx_req *mReq)
mEp->qh.ptr->td.token &=
cpu_to_le32(~(TD_STATUS_HALTED|TD_STATUS_ACTIVE));
+ if (mEp->type == USB_ENDPOINT_XFER_ISOC) {
+ u32 mul = mReq->req.length >> __ffs(mEp->ep.maxpacket);
+ if (mReq->req.length & ~(mul << __ffs(mEp->ep.maxpacket)))
+ mul++;
+ mEp->qh.ptr->cap |= mul << __ffs(QH_MULT);
+ }
+
wmb(); /* synchronize before ep prime */
ret = hw_ep_prime(ci, mEp->num, mEp->dir,
@@ -678,6 +685,12 @@ static int _ep_queue(struct usb_ep *ep, struct usb_request
*req,
}
}
+ if (usb_endpoint_xfer_isoc(mEp->ep.desc)
+ && mReq->req.length > (1 + mEp->ep.mult) * mEp->ep.maxpacket) {
+ dev_err(mEp->ci->dev, "request length to big for
isochronous\n");
+ return -EMSGSIZE;
+ }
+
/* first nuke then test link, e.g. previous status has not sent */
if (!list_empty(&mReq->queue)) {
dev_err(mEp->ci->dev, "request already in queue\n");
@@ -1060,7 +1073,8 @@ static int ep_enable(struct usb_ep *ep,
mEp->num = usb_endpoint_num(desc);
mEp->type = usb_endpoint_type(desc);
- mEp->ep.maxpacket = usb_endpoint_maxp(desc);
+ mEp->ep.maxpacket = usb_endpoint_maxp(desc) & 0x07ff;
+ mEp->ep.mult = QH_ISO_MULT(usb_endpoint_maxp(desc));
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
cap |= QH_IOS;
@@ -1246,6 +1260,9 @@ static int ep_set_halt(struct usb_ep *ep, int value)
if (ep == NULL || mEp->ep.desc == NULL)
return -EINVAL;
+ if (usb_endpoint_xfer_isoc(mEp->ep.desc))
+ return -EOPNOTSUPP;
+
spin_lock_irqsave(mEp->lock, flags);
#ifndef STALL_IN
diff --git a/drivers/usb/chipidea/udc.h b/drivers/usb/chipidea/udc.h
index d12e8b5..a75724a 100644
--- a/drivers/usb/chipidea/udc.h
+++ b/drivers/usb/chipidea/udc.h
@@ -50,6 +50,7 @@ struct ci13xxx_qh {
#define QH_MAX_PKT (0x07FFUL << 16)
#define QH_ZLT BIT(29)
#define QH_MULT (0x0003UL << 30)
+#define QH_ISO_MULT(x) ((x >> 11) & 0x03)
/* 1 */
u32 curr;
/* 2 - 8 */
--
1.8.2.rc2
--
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