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SAMA5 UDPHS interrupt decoding logic

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This commit is contained in:
Gregory Nutt 2013-08-29 18:11:34 -06:00
parent 8c92beb70e
commit 024da6049d
1 changed files with 58 additions and 3 deletions
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61
arch/arm/src/sama5/sam_udphs.c
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@ -447,6 +447,7 @@ static int sam_udphs_interrupt(int irq, void *context);
/* Endpoint helpers *********************************************************/
static void sam_epset_reset(struct sam_usbdev_s *priv, uint32_t epset);
static inline struct sam_ep_s *
sam_epreserve(struct sam_usbdev_s *priv, uint8_t epset);
static inline void
@ -2178,6 +2179,50 @@ static void sam_esofpoll(struct sam_usbdev_s *priv)
/****************************************************************************
* Endpoint Helpers
****************************************************************************/
/****************************************************************************
* Name: sam_epset_reset
****************************************************************************/
void sam_epset_reset(struct sam_usbdev_s *priv, uint32_t epset)
{
struct sam_ep_s *privep;
uint32_t bit;
int epno;
/* Restrict the set of of endpoints to those actually supported */
epset &= ((1 << SAM_UDPHS_NENDPOINTS) - 1);
/* Then reset each endpoint in the set */
for (epno = 0, bit = 1; epno < SAM_UDPHS_NENDPOINTS; epno++)
{
if ((epset & bit) != 0)
{
privep = &priv->eplist[epno];
/* Disable endpoint interrupt */
sam_putreg(~UDPHS_INT_EPT(epno), SAM_UDPHS_IEN);
/* Reset endpoint */
sam_putreg(UDPHS_EPTRST(epno), SAM_UDPHS_EPTRST);
/* Endpoint is no longer functional */
privep->epstate = UDPHS_EPSTATE_DISABLED;
privep->bank = 0;
/* Terminate transfer on this endpoint */
sam_endoftransfer(epno, USBD_STATUS_RESET);
}
bit <<= 1;
}
}
/****************************************************************************
* Name: sam_epreserve
****************************************************************************/
@ -3058,9 +3103,9 @@ static void sam_hw_setup(struct sam_usbdev_s *priv)
sam_udphs_enableclk();
/* Reset & disable endpoints */
/* Reset and disable endpoints */
sam_ep_resetall(0xffffffff, USBD_STATUS_RESET, 0);
sam_epset_reset(priv, 0xffffffff);
/* Configure the pull-up on D+ and disconnect it */
@ -3071,7 +3116,17 @@ static void sam_hw_setup(struct sam_usbdev_s *priv)
regval |= UDPHS_CTRL_PULLDDIS;
sam_putreg(regval, SAM_UDPHS_CTRL);
/* Reset the UDPHS block */
/* Reset the UDPHS block
*
* Paragraph 33.5.1. "One transceiver is shared with the USB High Speed
* Device (port A). The selection between Host Port A and USB Device is
* controlled by the UDPHS enable bit (EN_UDPHS) located in the UDPHS_CTRL
* control register.
*
* "In the case the port A is driven by the USB High Speed Device, the ...
* transceiver is automatically selected for Device operation once the
* USB High Speed Device is enabled."
*/
regval &= ~UDPHS_CTRL_ENUDPHS;
sam_putreg(regval, SAM_UDPHS_CTRL);