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author | Gregory Nutt <gnutt@nuttx.org> | 2013-09-03 14:53:10 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2013-09-03 14:53:10 -0600 |
commit | b4bb68d62079c291a1ff35330c82e8f078a117a0 (patch) | |
tree | de84cb867c417356efacaab36fd5de08d4c5fae2 | |
parent | 466a7dbebbbf854113efbb2b884842bd119c72ff (diff) | |
download | px4-nuttx-b4bb68d62079c291a1ff35330c82e8f078a117a0.tar.gz px4-nuttx-b4bb68d62079c291a1ff35330c82e8f078a117a0.tar.bz2 px4-nuttx-b4bb68d62079c291a1ff35330c82e8f078a117a0.zip |
SAMA5 UDPHS: Fix some issues with TX interrupt handling
-rw-r--r-- | nuttx/arch/arm/src/sama5/sam_udphs.c | 140 |
1 files changed, 81 insertions, 59 deletions
diff --git a/nuttx/arch/arm/src/sama5/sam_udphs.c b/nuttx/arch/arm/src/sama5/sam_udphs.c index af07065f1..71e3e1941 100644 --- a/nuttx/arch/arm/src/sama5/sam_udphs.c +++ b/nuttx/arch/arm/src/sama5/sam_udphs.c @@ -186,28 +186,26 @@ #define SAM_TRACEINTID_EP0SETUPOUT 0x000d #define SAM_TRACEINTID_EP0SETUPSETADDRESS 0x000e #define SAM_TRACEINTID_EPGETSTATUS 0x000f -#define SAM_TRACEINTID_EPINDONE 0x0010 -#define SAM_TRACEINTID_EPINQEMPTY 0x0011 -#define SAM_TRACEINTID_EPOUTQEMPTY 0x0012 -#define SAM_TRACEINTID_GETCONFIG 0x0013 -#define SAM_TRACEINTID_GETSETDESC 0x0014 -#define SAM_TRACEINTID_GETSETIF 0x0015 -#define SAM_TRACEINTID_GETSTATUS 0x0016 -#define SAM_TRACEINTID_IFGETSTATUS 0x0017 -#define SAM_TRACEINTID_INTERRUPT 0x0018 -#define SAM_TRACEINTID_INTSOF 0x0019 -#define SAM_TRACEINTID_NOSTDREQ 0x001a -#define SAM_TRACEINTID_PENDING 0x001b -#define SAM_TRACEINTID_RXRDY 0x001c -#define SAM_TRACEINTID_RXSETUP 0x001d -#define SAM_TRACEINTID_SETADDRESS 0x001e -#define SAM_TRACEINTID_SETCONFIG 0x001f -#define SAM_TRACEINTID_SETFEATURE 0x0020 -#define SAM_TRACEINTID_STALLSNT 0x0021 -#define SAM_TRACEINTID_SYNCHFRAME 0x0022 -#define SAM_TRACEINTID_TXRDY 0x0023 -#define SAM_TRACEINTID_UPSTRRES 0x0024 -#define SAM_TRACEINTID_WAKEUP 0x0025 +#define SAM_TRACEINTID_EPINQEMPTY 0x0010 +#define SAM_TRACEINTID_EPOUTQEMPTY 0x0011 +#define SAM_TRACEINTID_GETCONFIG 0x0012 +#define SAM_TRACEINTID_GETSETDESC 0x0013 +#define SAM_TRACEINTID_GETSETIF 0x0014 +#define SAM_TRACEINTID_GETSTATUS 0x0015 +#define SAM_TRACEINTID_IFGETSTATUS 0x0016 +#define SAM_TRACEINTID_INTERRUPT 0x0017 +#define SAM_TRACEINTID_INTSOF 0x0018 +#define SAM_TRACEINTID_NOSTDREQ 0x0019 +#define SAM_TRACEINTID_PENDING 0x001a +#define SAM_TRACEINTID_RXRDY 0x001b +#define SAM_TRACEINTID_RXSETUP 0x001c +#define SAM_TRACEINTID_SETCONFIG 0x001d +#define SAM_TRACEINTID_SETFEATURE 0x001e +#define SAM_TRACEINTID_STALLSNT 0x001f +#define SAM_TRACEINTID_SYNCHFRAME 0x0020 +#define SAM_TRACEINTID_TXRDY 0x0021 +#define SAM_TRACEINTID_UPSTRRES 0x0022 +#define SAM_TRACEINTID_WAKEUP 0x0023 /* Ever-present MIN and MAX macros */ @@ -399,7 +397,7 @@ static inline void sam_putreg(uint32_t regval, uintptr_t regaddr); static void sam_suspend(struct sam_usbdev_s *priv); static void sam_resume(struct sam_usbdev_s *priv); -/* DMA/Request Helpers ******************************************************/ +/* DMA Transfer Helpers *****************************************************/ #ifdef CONFIG_SAMA5_UDPHS_SCATTERGATHER static struct sam_dtd_s *sam_dtd_alloc(struct sam_usbdev_s *priv); @@ -422,6 +420,7 @@ static inline void sam_req_abort(struct sam_ep_s *privep, struct sam_req_s *privreq, int16_t result); static void sam_req_complete(struct sam_ep_s *privep, int16_t result); +static void sam_ep_txrdy(unsigned int epno); static int sam_req_wrnodma(struct sam_usbdev_s *priv, struct sam_ep_s *privep, struct sam_req_s *privreq); static int sam_req_write(struct sam_usbdev_s *priv, @@ -613,7 +612,6 @@ const struct trace_msg_t g_usb_trace_strings_intdecode[] = TRACE_STR(SAM_TRACEINTID_EP0SETUPOUT), TRACE_STR(SAM_TRACEINTID_EP0SETUPSETADDRESS), TRACE_STR(SAM_TRACEINTID_EPGETSTATUS), - TRACE_STR(SAM_TRACEINTID_EPINDONE), TRACE_STR(SAM_TRACEINTID_EPINQEMPTY), TRACE_STR(SAM_TRACEINTID_EPOUTQEMPTY), TRACE_STR(SAM_TRACEINTID_GETCONFIG), @@ -627,7 +625,6 @@ const struct trace_msg_t g_usb_trace_strings_intdecode[] = TRACE_STR(SAM_TRACEINTID_PENDING), TRACE_STR(SAM_TRACEINTID_RXRDY), TRACE_STR(SAM_TRACEINTID_RXSETUP), - TRACE_STR(SAM_TRACEINTID_SETADDRESS), TRACE_STR(SAM_TRACEINTID_SETCONFIG), TRACE_STR(SAM_TRACEINTID_SETFEATURE), TRACE_STR(SAM_TRACEINTID_STALLSNT), @@ -986,8 +983,6 @@ static int sam_req_wrdma(struct sam_usbdev_s *priv, struct sam_ep_s *privep, regval = sam_getreg(SAM_UDPHS_IEN); regval |= UDPHS_INT_EPT(epno); sam_putreg(regval, SAM_UDPHS_IEN); - - sam_putreg(UDPHS_EPTCTL_TXRDY, SAM_UDPHS_EPTCTLENB(epno)); return OK; } @@ -1140,9 +1135,6 @@ static void sam_req_complete(struct sam_ep_s *privep, int16_t result) if (privreq) { - DEBUGASSERT((privep->epstate == UDPHS_EPSTATE_RECEIVING) || - (privep->epstate == UDPHS_EPSTATE_SENDING)) - /* Save the result in the request structure */ privreq->req.result = result; @@ -1160,6 +1152,36 @@ static void sam_req_complete(struct sam_ep_s *privep, int16_t result) } /**************************************************************************** + * Name: sam_ep_txrdy + * + * Description: + * IN data has been loaded in the endpoint FIFO. Manage the endpoint to + * (1) initiate sending of the data and (2) receive the TXRDY interrupt + * when the transfer completes. + * + ****************************************************************************/ + +static void sam_ep_txrdy(unsigned int epno) +{ + /* Set TXRDY to indicate that the packet is ready to send (this works even + * for zero length packets). We will get an TXCOMP interrupt with TXRDY + * cleared. Then we are able to send the next packet. + */ + + sam_putreg(UDPHS_EPTSETSTA_TXRDY, SAM_UDPHS_EPTSETSTA(epno)); + + /* Clear the NAK IN bit to stop NAKing IN tokens from the host. We now + * have data ready to go. + */ + + sam_putreg(UDPHS_EPTSTA_NAKIN, SAM_UDPHS_EPTCLRSTA(epno)); + + /* Enable the TXRDY interrupt on the endpoint */ + + sam_putreg(UDPHS_EPTCTL_TXRDY, SAM_UDPHS_EPTCTLENB(epno)); +} + +/**************************************************************************** * Name: sam_req_wrnodma * * Description: @@ -1267,18 +1289,11 @@ static int sam_req_wrnodma(struct sam_usbdev_s *priv, struct sam_ep_s *privep, privep->epstate = UDPHS_EPSTATE_SENDING; } - /* Set TXRDY to indicate that the packet is ready to send (this works even - * for zero length packets). We will get an TXCOMP interrupt with TXRDY - * cleared. Then we are able to send the next packet. - */ - - sam_putreg(UDPHS_EPTSETSTA_TXRDY, SAM_UDPHS_EPTSETSTA(epno)); - - /* Clear the NAK IN bit to stop NAKing IN tokens from the host. We now - * have data ready to go. + /* Initiate the transfer and configure to receive the transfer complete + * interrupt. */ - sam_putreg(UDPHS_EPTSTA_NAKIN, SAM_UDPHS_EPTCLRSTA(epno)); + sam_ep_txrdy(epno); return OK; } @@ -1396,11 +1411,12 @@ static int sam_req_write(struct sam_usbdev_s *priv, struct sam_ep_s *privep) privep->epstate = UDPHS_EPSTATE_SENDING; privep->txnullpkt = 0; privreq->inflight = 0; - sam_putreg(UDPHS_EPTSETSTA_TXRDY, SAM_UDPHS_EPTSETSTA(epno)); - /* Clear the NAK IN bit to stop NAKing IN tokens from the host. */ + /* Initiate the zero length transfer and configure to receive the + * transfer complete interrupt. + */ - sam_putreg(UDPHS_EPTSTA_NAKIN, SAM_UDPHS_EPTCLRSTA(epno)); + sam_ep_txrdy(epno); } /* If all of the bytes were sent (including any final null packet) @@ -1429,6 +1445,8 @@ static int sam_req_write(struct sam_usbdev_s *priv, struct sam_ep_s *privep) sam_putreg(regval, SAM_UDPHS_IEN); } + /* Disable the TXRDY interrupt */ + sam_putreg(UDPHS_EPTCTL_TXRDY, SAM_UDPHS_EPTCTLDIS(epno)); privep->txnullpkt = 0; sam_req_complete(privep, OK); @@ -1659,18 +1677,11 @@ static void sam_ep0_wrstatus(const uint8_t *buffer, size_t buflen) *fifo++ = *buffer++; } - /* Set TXRDY to indicate that the packet is ready to send (this works even - * for zero length packets). We will get an TXCOMP interrupt with TXRDY - * cleared. Then we are able to send the next packet. + /* Initiate the transfer and configure to receive the transfer complete + * interrupt. */ - sam_putreg(UDPHS_EPTSETSTA_TXRDY, SAM_UDPHS_EPTSETSTA(EP0)); - - /* Clear the NAK IN bit to stop NAKing IN tokens from the host. We now - * have data ready to go. - */ - - sam_putreg(UDPHS_EPTSTA_NAKIN, SAM_UDPHS_EPTCLRSTA(EP0)); + sam_ep_txrdy(EP0); } /**************************************************************************** @@ -2004,7 +2015,6 @@ static void sam_ep0_setup(struct sam_usbdev_s *priv) * len: 0; data = none */ - usbtrace(TRACE_INTDECODE(SAM_TRACEINTID_EP0SETUPSETADDRESS), value.w); if ((priv->ctrl.type & USB_REQ_RECIPIENT_MASK) != USB_REQ_RECIPIENT_DEVICE || index.w != 0 || len.w != 0 || value.w > 127) { @@ -2018,7 +2028,7 @@ static void sam_ep0_setup(struct sam_usbdev_s *priv) * be set when the zero-length packet transfer completes. */ - usbtrace(TRACE_INTDECODE(SAM_TRACEINTID_SETADDRESS), value.w); + usbtrace(TRACE_INTDECODE(SAM_TRACEINTID_EP0SETUPSETADDRESS), value.w); priv->devaddr = value.w; ep0result = UDPHS_EP0SETUP_ADDRESS; } @@ -2168,8 +2178,9 @@ static void sam_ep0_setup(struct sam_usbdev_s *priv) * 1b. ep0result == UDPHS_EP0SETUP_ADDRESS * * A special case is the case where epstate=UDPHS_EPSTATE_EP0ADDRESS. - * This that the above processing generated an additional state where - * we need to wait to obtain our device address. + * This means that the above processing generated an additional state + * where we need to wait until we complete the status phase before + * applying the new device address. * * 2. ep0result == UDPHS_EP0SETUP_DISPATCHED; * @@ -2406,7 +2417,9 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno) if (privep->epstate == UDPHS_EPSTATE_SENDING || privep->epstate == UDPHS_EPSTATE_EP0STATUSIN) { - /* Continue/resume processing the write requests */ + /* Continue/resume processing the write requests. TXRDY will + * be disabled when the last transfer completes. + */ privep->epstate = UDPHS_EPSTATE_IDLE; (void)sam_req_write(priv, privep); @@ -2422,11 +2435,20 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno) else if (privep->epstate == UDPHS_EPSTATE_EP0ADDRESS) { usbtrace(TRACE_INTDECODE(SAM_TRACEINTID_ADDRESSED), priv->devaddr); + DEBUGASSERT(epno == EP0); + + /* Set the device address */ + sam_setdevaddr(priv, priv->devaddr); + + /* Disable the further TXRDY interrupts on EP0. */ + + sam_putreg(UDPHS_EPTCTL_TXRDY, SAM_UDPHS_EPTCTLDIS(epno)); } else { usbtrace(TRACE_DEVERROR(SAM_TRACEERR_TXRDYERR), privep->epstate); + sam_putreg(UDPHS_EPTCTL_TXRDY, SAM_UDPHS_EPTCTLDIS(epno)); } } @@ -2455,7 +2477,7 @@ static void sam_ep_interrupt(struct sam_usbdev_s *priv, int epno) /* Did we just receive the data associated with an OUT SETUP command? */ - else if (privep->epstate != UDPHS_EPSTATE_EP0DATAOUT) + else if (privep->epstate == UDPHS_EPSTATE_EP0DATAOUT) { uint16_t len; |