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SAMA5 UDPHS: Fix error where bit was not cleared to acknowledge receipt of data and to setup for the next incoming data

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This commit is contained in:
Gregory Nutt 2014-04-06 13:13:31 -06:00
parent 3e710c0080
commit 398bf81c18
1 changed files with 17 additions and 4 deletions
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21
arch/arm/src/sama5/sam_udphs.c
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@ -2587,7 +2587,9 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno)
((eptsta & UDPHS_EPTSTA_BYTECNT_MASK) >>
UDPHS_EPTSTA_BYTECNT_SHIFT);
/* And continue processing the read request */
/* And continue processing the read request, clearing RXRDYTXKL in
* order to receive more data.
*/
privep->epstate = UDPHS_EPSTATE_IDLE;
sam_req_read(priv, privep, pktsize);
@ -2615,9 +2617,12 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno)
len = GETUINT16(priv->ctrl.len);
if (len == pktsize)
{
/* Copy the OUT data from the EP0 FIFO into special EP0 buffer. */
/* Copy the OUT data from the EP0 FIFO into special EP0 buffer
* and clear RXRDYTXKL in order to receive more data.
*/
sam_ep0_read(priv->ep0out, len);
sam_putreg(UDPHS_EPTSTA_RXRDYTXKL, SAM_UDPHS_EPTCLRSTA(epno));
/* And handle the EP0 SETUP now. */
@ -2626,7 +2631,11 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno)
else
{
usbtrace(TRACE_DEVERROR(SAM_TRACEERR_EP0SETUPOUTSIZE), pktsize);
/* STALL and discard received data. */
(void)sam_ep_stall(&privep->ep, false);
sam_putreg(UDPHS_EPTSTA_RXRDYTXKL, SAM_UDPHS_EPTCLRSTA(epno));
}
}
else
@ -2636,14 +2645,12 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno)
if (eptype == UDPHS_EPTCFG_TYPE_CTRL8 &&
(eptsta & UDPHS_EPTSTA_BYTECNT_MASK) == 0)
{
sam_putreg(UDPHS_EPTSTA_RXRDYTXKL, SAM_UDPHS_EPTCLRSTA(epno));
}
/* Data has been STALLed */
else if ((eptsta & UDPHS_EPTSTA_FRCESTALL) != 0)
{
sam_putreg(UDPHS_EPTSTA_RXRDYTXKL, SAM_UDPHS_EPTCLRSTA(epno));
}
/* NAK the data */
@ -2654,6 +2661,12 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno)
regval &= ~UDPHS_INT_EPT(epno);
sam_putreg(regval, SAM_UDPHS_IEN);
}
/* Discard any received data and clear UDPHS_EPTSTA_RXRDYTXKL so that we
* may receive more data.
*/
sam_putreg(UDPHS_EPTSTA_RXRDYTXKL, SAM_UDPHS_EPTCLRSTA(epno));
}
}