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SAM4E UDP: Fix FIFO reset logic

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This commit is contained in:
Gregory Nutt 2014-03-18 17:24:50 -06:00
parent 47ffb340e9
commit cba9127a86
1 changed files with 10 additions and 12 deletions
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20
arch/arm/src/sam34/sam_udp.c
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@ -297,7 +297,6 @@ struct sam_ep_s
struct sam_usbdev_s *dev; /* Reference to private driver data */ struct sam_usbdev_s *dev; /* Reference to private driver data */
struct sam_rqhead_s reqq; /* Read/write request queue */ struct sam_rqhead_s reqq; /* Read/write request queue */
volatile uint8_t epstate; /* State of the endpoint (see enum sam_epstate_e) */ volatile uint8_t epstate; /* State of the endpoint (see enum sam_epstate_e) */
volatile uint8_t bank; /* Current reception bank (0 or 1) */
uint8_t stalled:1; /* true: Endpoint is stalled */ uint8_t stalled:1; /* true: Endpoint is stalled */
uint8_t halted:1; /* true: Endpoint feature halted */ uint8_t halted:1; /* true: Endpoint feature halted */
uint8_t zlpneeded:1; /* Zero length packet needed at end of transfer */ uint8_t zlpneeded:1; /* Zero length packet needed at end of transfer */
@ -1448,7 +1447,7 @@ static void sam_ep0_setup(struct sam_usbdev_s *priv)
/* Assume NOT stalled; no TX in progress */ /* Assume NOT stalled; no TX in progress */
ep0->stalled = 0; ep0->stalled = false;
ep0->epstate = UDP_EPSTATE_IDLE; ep0->epstate = UDP_EPSTATE_IDLE;
/* And extract the little-endian 16-bit values to host order */ /* And extract the little-endian 16-bit values to host order */
@ -1590,7 +1589,7 @@ static void sam_ep0_setup(struct sam_usbdev_s *priv)
value.w == USB_FEATURE_ENDPOINTHALT && len.w == 0) value.w == USB_FEATURE_ENDPOINTHALT && len.w == 0)
{ {
privep = &priv->eplist[epno]; privep = &priv->eplist[epno];
privep->halted = 0; privep->halted = false;
ret = sam_ep_stall(&privep->ep, true); ret = sam_ep_stall(&privep->ep, true);
if (ret < 0) if (ret < 0)
@ -1639,7 +1638,7 @@ static void sam_ep0_setup(struct sam_usbdev_s *priv)
value.w == USB_FEATURE_ENDPOINTHALT && len.w == 0) value.w == USB_FEATURE_ENDPOINTHALT && len.w == 0)
{ {
privep = &priv->eplist[epno]; privep = &priv->eplist[epno];
privep->halted = 1; privep->halted = true;
ret = sam_ep_stall(&privep->ep, false); ret = sam_ep_stall(&privep->ep, false);
if (ret < 0) if (ret < 0)
@ -2484,9 +2483,10 @@ static void sam_ep_reset(struct sam_usbdev_s *priv, uint8_t epno)
sam_req_cancel(privep, -ESHUTDOWN); sam_req_cancel(privep, -ESHUTDOWN);
/* Reset endpoint */ /* Reset the endpoint FIFO */
sam_putreg(UDP_RSTEP(epno), SAM_UDP_RSTEP); sam_putreg(UDP_RSTEP(epno), SAM_UDP_RSTEP);
sam_putreg(0, SAM_UDP_RSTEP);
/* Reset endpoint status */ /* Reset endpoint status */
@ -2654,18 +2654,15 @@ static int sam_ep_configure_internal(struct sam_ep_s *privep,
csr = SAM_UDPEP_CSR(epno); csr = SAM_UDPEP_CSR(epno);
sam_putreg(0, csr); sam_putreg(0, csr);
/* Reset Endpoint FIFOS */ /* Reset the endpoint FIFO */
sam_putreg(UDP_RSTEP(epno), SAM_UDP_RSTEP); sam_putreg(UDP_RSTEP(epno), SAM_UDP_RSTEP);
sam_putreg(0, SAM_UDP_RSTEP);
/* Disable endpoint interrupts now */ /* Disable endpoint interrupts now */
sam_putreg(UDP_INT_EP(epno), SAM_UDP_IDR); sam_putreg(UDP_INT_EP(epno), SAM_UDP_IDR);
/* Wait for the endpoint to come out of reset */
while ((sam_getreg(SAM_UDP_RSTEP) & UDP_RSTEP(epno)) != 0);
/* Configure and enable the endpoint */ /* Configure and enable the endpoint */
regval = (((uint32_t)dirin << UDPEP_CSR_DIR_SHIFT) | UDPEP_CSR_EPEDS); regval = (((uint32_t)dirin << UDPEP_CSR_DIR_SHIFT) | UDPEP_CSR_EPEDS);
@ -3100,9 +3097,10 @@ static int sam_ep_stall(struct usbdev_ep_s *ep, bool resume)
sam_csr_clrbits(epno, UDPEP_CSR_DTGLE | UDPEP_CSR_FORCESTALL); sam_csr_clrbits(epno, UDPEP_CSR_DTGLE | UDPEP_CSR_FORCESTALL);
/* Reset endpoint FIFOs */ /* Reset the endpoint FIFO */
sam_putreg(UDP_RSTEP(epno), SAM_UDP_RSTEP); sam_putreg(UDP_RSTEP(epno), SAM_UDP_RSTEP);
sam_putreg(0, SAM_UDP_RSTEP);
/* Resuming any blocked data transfers on the endpoint */ /* Resuming any blocked data transfers on the endpoint */