diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32_otgfshost.c')
-rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_otgfshost.c | 386 |
1 files changed, 251 insertions, 135 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_otgfshost.c b/nuttx/arch/arm/src/stm32/stm32_otgfshost.c index 256751d12..9e6b2615a 100644 --- a/nuttx/arch/arm/src/stm32/stm32_otgfshost.c +++ b/nuttx/arch/arm/src/stm32/stm32_otgfshost.c @@ -234,6 +234,7 @@ struct stm32_usbhost_s uint8_t ep0in; /* EP0 IN control channel index */ uint8_t ep0out; /* EP0 OUT control channel index */ uint8_t ep0size; /* EP0 max packet size */ + uint8_t chidx; /* ID of channel waiting for space in Tx FIFO */ bool lowspeed; /* True: low speed device */ volatile bool connected; /* Connected to device */ volatile bool eventwait; /* True: Thread is waiting for a port event */ @@ -339,6 +340,7 @@ static int stm32_gint_isr(int irq, FAR void *context); static void stm32_gint_enable(void); static void stm32_gint_disable(void); static inline void stm32_hostinit_enable(void); +static void stm32_txfe_enable(FAR struct stm32_usbhost_s *priv, int chidx); /* USB host controller operations **********************************************/ @@ -974,6 +976,7 @@ static void stm32_chan_wakeup(FAR struct stm32_usbhost_s *priv, if (chan->result != EBUSY && chan->waiter) { + ullvdbg("Wakeup with result: %d\n", chan->result); stm32_givesem(&chan->waitsem); chan->waiter = false; } @@ -989,32 +992,38 @@ static void stm32_chan_wakeup(FAR struct stm32_usbhost_s *priv, static void stm32_transfer_start(FAR struct stm32_usbhost_s *priv, int chidx) { + FAR struct stm32_chan_s *chan; uint32_t regval; unsigned int npackets; unsigned int maxpacket; - unsigned int buflen32; - unsigned int avail32; + unsigned int avail; + unsigned int wrsize; + unsigned int minsize; /* Set up the initial state of the transfer */ - priv->chan[chidx].result = EBUSY; - priv->chan[chidx].inflight = 0; + chan = &priv->chan[chidx]; + uvdbg("chidx: %d buflen: %d\n", chidx, chan->buflen); + + chan->result = EBUSY; + chan->inflight = 0; + priv->chidx = chidx; /* Compute the expected number of packets associated to the transfer. * If the transfer length is zero (or less than the size of one maximum * size packet), then one packet is expected. */ - /* If the transfer size is greater than one packet, then xalculate the + /* If the transfer size is greater than one packet, then calculate the * number of packets that will be received/sent, including any partial * final packet. */ - maxpacket = priv->chan[chidx].maxpacket; + maxpacket = chan->maxpacket; - if (priv->chan[chidx].buflen > maxpacket) + if (chan->buflen > maxpacket) { - npackets = (priv->chan[chidx].buflen + maxpacket - 1) / maxpacket; + npackets = (chan->buflen + maxpacket - 1) / maxpacket; /* Clip if the buffer length if it exceeds the maximum number of * packets that can be transferred (this should not happen). @@ -1023,7 +1032,8 @@ static void stm32_transfer_start(FAR struct stm32_usbhost_s *priv, int chidx) if (npackets > STM32_MAX_PKTCOUNT) { npackets = STM32_MAX_PKTCOUNT; - priv->chan[chidx].buflen = STM32_MAX_PKTCOUNT * maxpacket; + chan->buflen = STM32_MAX_PKTCOUNT * maxpacket; + ulldbg("CLIP: chidx: %d buflen: %d\n", chidx, chan->buflen); } } else @@ -1039,19 +1049,19 @@ static void stm32_transfer_start(FAR struct stm32_usbhost_s *priv, int chidx) */ #if 0 /* Think about this */ - if (priv->chan[chidx].in) + if (chan->in) { /* Force the buffer length to an even multiple of maxpacket */ - priv->chan[chidx].buflen = npackets * maxpacket; + chan->buflen = npackets * maxpacket; } #endif /* Setup the HCTSIZn register */ - regval = ((uint32_t)priv->chan[chidx].buflen << OTGFS_HCTSIZ_XFRSIZ_SHIFT) | + regval = ((uint32_t)chan->buflen << OTGFS_HCTSIZ_XFRSIZ_SHIFT) | ((uint32_t)npackets << OTGFS_HCTSIZ_PKTCNT_SHIFT) | - ((uint32_t)priv->chan[chidx].pid << OTGFS_HCTSIZ_DPID_SHIFT); + ((uint32_t)chan->pid << OTGFS_HCTSIZ_DPID_SHIFT); stm32_putreg(STM32_OTGFS_HCTSIZ(chidx), regval); /* Setup the HCCHAR register: Frame oddness and host channel enable */ @@ -1076,63 +1086,76 @@ static void stm32_transfer_start(FAR struct stm32_usbhost_s *priv, int chidx) * the outgoing data into the correct TxFIFO. */ - if (!priv->chan[chidx].in && priv->chan[chidx].buflen > 0) + if (!chan->in && chan->buflen > 0) { /* Handle non-periodic (CTRL and BULK) OUT transfers differently than - * perioci (INTR and ISOC) OUT transfers. + * periodic (INTR and ISOC) OUT transfers. */ - buflen32 = (priv->chan[chidx].buflen + 3) >> 2; - switch (priv->chan[chidx].eptype) + minsize = MIN(chan->buflen, chan->maxpacket); + + switch (chan->eptype) { case OTGFS_EPTYPE_CTRL: /* Non periodic transfer */ case OTGFS_EPTYPE_BULK: { /* Read the Non-periodic Tx FIFO status register */ - regval = stm32_getreg(STM32_OTGFS_HNPTXSTS); - avail32 = (regval & OTGFS_HNPTXSTS_NPTXFSAV_MASK) >> OTGFS_HNPTXSTS_NPTXFSAV_SHIFT; + regval = stm32_getreg(STM32_OTGFS_HNPTXSTS); + avail = ((regval & OTGFS_HNPTXSTS_NPTXFSAV_MASK) >> OTGFS_HNPTXSTS_NPTXFSAV_SHIFT) << 2; + } + break; - /* Check if there is enough space available in the Tx FIFO */ + /* Periodic transfer */ - if (buflen32 > avail32) - { - /* Insufficient space... Enable the Non-periodic Tx FIFO - * interrupt to handle the transfer when the Tx FIFO is empty. - */ + case OTGFS_EPTYPE_INTR: + case OTGFS_EPTYPE_ISOC: + { + /* Read the Non-periodic Tx FIFO status register */ - stm32_modifyreg(STM32_OTGFS_GINTMSK, 0, OTGFS_GINT_NPTXFE); - } + regval = stm32_getreg(STM32_OTGFS_HPTXSTS); + avail = ((regval & OTGFS_HPTXSTS_PTXFSAVL_MASK) >> OTGFS_HPTXSTS_PTXFSAVL_SHIFT) << 2; } break; - /* Periodic transfer */ + default: + DEBUGASSERT(false); + return; + } - case OTGFS_EPTYPE_INTR: - case OTGFS_EPTYPE_ISOC: - /* Read the Non-periodic Tx FIFO status register */ + /* Is there space in the TxFIFO to hold the minimum size packet? */ - regval = stm32_getreg(STM32_OTGFS_HPTXSTS); - avail32 = (regval & OTGFS_HPTXSTS_PTXFSAVL_MASK) >> OTGFS_HPTXSTS_PTXFSAVL_SHIFT; + if (minsize <= avail) + { + /* Yes.. Get the size of the biggest thing that we can put in the Tx FIFO now */ - /* Check if there is enough space in FIFO space */ + wrsize = chan->buflen; + if (wrsize > avail) + { + /* Clip the write size to the number of full, max sized packets + * that will fit in the Tx FIFO. + */ - if (buflen32 > avail32) - { - /* Need to process data in OTGFS_GINT_PTXFE interrupt */ + unsigned int wrpackets = avail / chan->maxpacket; + wrsize = wrpackets * chan->maxpacket; + } + + /* Write packet into the Tx FIFO. */ - stm32_modifyreg(STM32_OTGFS_GINTMSK, 0, OTGFS_GINT_PTXFE); - } - break; + stm32_gint_wrpacket(priv, chan->buffer, chidx, wrsize); + } - default: - break; - } + /* Did we put the entire buffer into the Tx FIFO? */ - /* Write packet into the Tx FIFO. */ + if (chan->buflen > avail) + { + /* No, there was insufficient space to hold the entire transfer ... + * Enable the Tx FIFO interrupt to handle the transfer when the Tx + * FIFO becomes empty. + */ - stm32_gint_wrpacket(priv, priv->chan[chidx].buffer, chidx, - priv->chan[chidx].buflen); + stm32_txfe_enable(priv, chidx); + } } } @@ -1388,7 +1411,7 @@ static inline void stm32_gint_hcinisr(FAR struct stm32_usbhost_s *priv, /* AND the two to get the set of enabled, pending HC interrupts */ pending &= regval; - uvdbg("HCINTMSK%d: %08x pending: %08x\n", chidx, regval, pending); + ullvdbg("HCINTMSK%d: %08x pending: %08x\n", chidx, regval, pending); /* Check for a pending ACK response received/transmitted (ACK) interrupt */ @@ -1475,6 +1498,7 @@ static inline void stm32_gint_hcinisr(FAR struct stm32_usbhost_s *priv, { /* Force the next transfer on an ODD frame */ + regval = stm32_getreg(STM32_OTGFS_HCCHAR(chidx)); regval |= OTGFS_HCCHAR_ODDFRM; stm32_putreg(STM32_OTGFS_HCCHAR(chidx), regval); @@ -1565,6 +1589,7 @@ static inline void stm32_gint_hcinisr(FAR struct stm32_usbhost_s *priv, * CHENA is set */ + regval = stm32_getreg(STM32_OTGFS_HCCHAR(chidx)); regval |= OTGFS_HCCHAR_CHENA; regval &= ~OTGFS_HCCHAR_CHDIS; stm32_putreg(STM32_OTGFS_HCCHAR(chidx), regval); @@ -1620,7 +1645,7 @@ static inline void stm32_gint_hcoutisr(FAR struct stm32_usbhost_s *priv, /* AND the two to get the set of enabled, pending HC interrupts */ pending &= regval; - uvdbg("HCINTMSK%d: %08x pending: %08x\n", chidx, regval, pending); + ullvdbg("HCINTMSK%d: %08x pending: %08x\n", chidx, regval, pending); /* Check for a pending ACK response received/transmitted (ACK) interrupt */ @@ -1708,7 +1733,7 @@ static inline void stm32_gint_hcoutisr(FAR struct stm32_usbhost_s *priv, stm32_putreg(STM32_OTGFS_HCINT(chidx), OTGFS_HCINT_TXERR); } - /* Check for a pending response received (xxx) interrupt */ + /* Check for a NYET interrupt */ #if 0 /* NYET is a reserved bit in the HCINT register */ else if ((pending & OTGFS_HCINT_NYET) != 0) @@ -1717,7 +1742,7 @@ static inline void stm32_gint_hcoutisr(FAR struct stm32_usbhost_s *priv, stm32_chan_halt(priv, chidx, CHREASON_NYET); - /* Clear the pending the response received (xxx) interrupt */ + /* Clear the pending the NYET interrupt */ stm32_putreg(STM32_OTGFS_HCINT(chidx), OTGFS_HCINT_NYET); } @@ -1934,7 +1959,7 @@ static inline void stm32_gint_rxflvlisr(FAR struct stm32_usbhost_s *priv) /* Read and pop the next status from the Rx FIFO */ grxsts = stm32_getreg(STM32_OTGFS_GRXSTSP); - uvdbg("GRXSTS: %08x\n", grxsts); + ullvdbg("GRXSTS: %08x\n", grxsts); /* Isolate the channel number/index in the status word */ @@ -2015,67 +2040,84 @@ static inline void stm32_gint_rxflvlisr(FAR struct stm32_usbhost_s *priv) static inline void stm32_gint_nptxfeisr(FAR struct stm32_usbhost_s *priv) { + FAR struct stm32_chan_s *chan; uint32_t regval; - unsigned int buflen; - unsigned int buflen32; unsigned int wrsize; - unsigned int avail32; + unsigned int minsize; + unsigned int avail; unsigned int chidx; - /* Loop while there is data to be sent and where there is space available - * in the non-periodic Tx FIFO. + /* Recover the index of the channel that is waiting for space in the Tx + * FIFO. */ - for (;;) + chidx = priv->chidx; + chan = &priv->chan[chidx]; + + /* Reduce the buffer size by the number of bytes that were previously placed + * in the Tx FIFO. + */ + + chan->buffer += chan->inflight; + chan->buflen -= chan->inflight; + chan->inflight = 0; + + /* If we have now transfered the entire buffer, then this transfer is + * complete (this case really should never happen because we disable + * the NPTXFE interrupt on the final packet). + */ + + if (chan->buflen <= 0) { - /* Read the status from the top of the non-periodic TxFIFO */ + /* Disable further Tx FIFO empty interrupts and bail. */ - regval = stm32_getreg(STM32_OTGFS_HNPTXSTS); + stm32_modifyreg(STM32_OTGFS_GINTMSK, OTGFS_GINT_NPTXFE, 0); + return; + } - /* Extract the channel number and the number of 32-bit words available in - * the non-periodic Tx FIFO. - */ + /* Read the status from the top of the non-periodic TxFIFO */ - chidx = (regval & OTGFS_HNPTXSTS_CHNUM_MASK) >> OTGFS_HNPTXSTS_CHNUM_SHIFT; - avail32 = (regval & OTGFS_HNPTXSTS_NPTXFSAV_MASK) >> OTGFS_HNPTXSTS_NPTXFSAV_SHIFT; + regval = stm32_getreg(STM32_OTGFS_HNPTXSTS); - /* Get the number of words remaining to be sent */ + /* Extract the number of bytes available in the non-periodic Tx FIFO. */ - buflen = priv->chan[chidx].buflen; - buflen32 = (buflen + 3) >> 2; + avail = ((regval & OTGFS_HNPTXSTS_NPTXFSAV_MASK) >> OTGFS_HNPTXSTS_NPTXFSAV_SHIFT) << 2; - /* Break out of the loop if either (a) there is nothing more to be - * sent, or (2) there is insufficent space availabe in the non-periodic - * Tx FIFO to hold the next packet. - */ + /* Get minimal size packet that can be sent. Something is serioulsy + * configured wrong if one packet will not fit into the empty Tx FIFO. + */ - if (buflen == 0 || avail32 <= buflen32) - { - return; - } - - /* Get the number of bytes available in the non-periodic Tx FIFO. That - * is the maximum write size. - */ + minsize = MIN(chan->buflen, chan->maxpacket); + DEBUGASSERT(chan->buflen > 0 && avail >= minsize); - wrsize = avail32 << 2; + /* Get the size to put in the Tx FIFO now */ - /* Clip the actual write size to the number of bytes actually available - * to be sent. + wrsize = chan->buflen; + if (wrsize > avail) + { + /* Clip the write size to the number of full, max sized packets + * that will fit in the Tx FIFO. */ - if (wrsize > buflen) - { - /* This is the last packet to be sent. Clip to the amount of - * data to send in the last packet. - */ - - wrsize = buflen; - stm32_modifyreg(STM32_OTGFS_GINTMSK, OTGFS_GINT_NPTXFE, 0); - } + unsigned int wrpackets = avail / chan->maxpacket; + wrsize = wrpackets * chan->maxpacket; + } + + /* Otherwise, this will be the last packet to be sent in this transaction. + * We now need to disable further NPTXFE interrupts. + */ - stm32_gint_wrpacket(priv, priv->chan[chidx].buffer, chidx, wrsize); + else + { + stm32_modifyreg(STM32_OTGFS_GINTMSK, OTGFS_GINT_NPTXFE, 0); } + + /* Write the next group of packets into the Tx FIFO */ + + ullvdbg("HNPTXSTS: %08x chidx: %d avail: %d buflen: %d wrsize: %d\n", + regval, chidx, avail, chan->buflen, wrsize); + + stm32_gint_wrpacket(priv, chan->buffer, chidx, wrsize); } /******************************************************************************* @@ -2088,67 +2130,84 @@ static inline void stm32_gint_nptxfeisr(FAR struct stm32_usbhost_s *priv) static inline void stm32_gint_ptxfeisr(FAR struct stm32_usbhost_s *priv) { + FAR struct stm32_chan_s *chan; uint32_t regval; - unsigned int buflen; - unsigned int buflen32; unsigned int wrsize; - unsigned int avail32; + unsigned int minsize; + unsigned int avail; unsigned int chidx; - /* Loop while there is data to be sent and where there is space available - * in the periodic Tx FIFO. + /* Recover the index of the channel that is waiting for space in the Tx + * FIFO. */ - for (;;) + chidx = priv->chidx; + chan = &priv->chan[chidx]; + + /* Reduce the buffer size by the number of bytes that were previously placed + * in the Tx FIFO. + */ + + chan->buffer += chan->inflight; + chan->buflen -= chan->inflight; + chan->inflight = 0; + + /* If we have now transfered the entire buffer, then this transfer is + * complete (this case really should never happen because we disable + * the PTXFE interrupt on the final packet). + */ + + if (chan->buflen <= 0) { - /* Read the status from the top of the periodic TxFIFO */ + /* Disable further Tx FIFO empty interrupts and bail. */ - regval = stm32_getreg(STM32_OTGFS_HPTXSTS); + stm32_modifyreg(STM32_OTGFS_GINTMSK, OTGFS_GINT_PTXFE, 0); + return; + } - /* Extract the channel number and the number of 32-bit words available in - * the periodic Tx FIFO. - */ + /* Read the status from the top of the periodic TxFIFO */ - chidx = (regval & OTGFS_HPTXSTS_CHNUM_MASK) >> OTGFS_HPTXSTS_CHNUM_SHIFT; - avail32 = (regval & OTGFS_HPTXSTS_PTXFSAVL_MASK) >> OTGFS_HPTXSTS_PTXFSAVL_SHIFT; + regval = stm32_getreg(STM32_OTGFS_HPTXSTS); - /* Get the number of words remaining to be sent */ + /* Extract the number of bytes available in the periodic Tx FIFO. */ - buflen = priv->chan[chidx].buflen; - buflen32 = (buflen + 3) >> 2; + avail = ((regval & OTGFS_HPTXSTS_PTXFSAVL_MASK) >> OTGFS_HPTXSTS_PTXFSAVL_SHIFT) << 2; - /* Break out of the loop if either (a) there is nothing more to be - * sent, or (2) there is insufficent space availabe in the periodic - * Tx FIFO to hold the next packet. - */ + /* Get minimal size packet that can be sent. Something is serioulsy + * configured wrong if one packet will not fit into the empty Tx FIFO. + */ - if (buflen == 0 || avail32 <= buflen32) - { - return; - } - - /* Get the number of bytes available in the periodic Tx FIFO. That is - * the maximum write size. - */ + minsize = MIN(chan->buflen, chan->maxpacket); + DEBUGASSERT(chan->buflen > 0 && avail >= minsize); - wrsize = avail32 << 2; + /* Get the size to put in the Tx FIFO now */ - /* Clip the actual write size to the number of bytes actually available - * to be sent. + wrsize = chan->buflen; + if (wrsize > avail) + { + /* Clip the write size to the number of full, max sized packets + * that will fit in the Tx FIFO. */ - if (wrsize > buflen) - { - /* This is the last packet to be sent. Clip to the amount of - * data to send in the last packet. - */ - - wrsize = buflen; - stm32_modifyreg(STM32_OTGFS_GINTMSK, OTGFS_GINT_PTXFE, 0); - } + unsigned int wrpackets = avail / chan->maxpacket; + wrsize = wrpackets * chan->maxpacket; + } + + /* Otherwise, this will be the last packet to be sent in this transaction. + * We now need to disable further PTXFE interrupts. + */ - stm32_gint_wrpacket(priv, priv->chan[chidx].buffer, chidx, wrsize); + else + { + stm32_modifyreg(STM32_OTGFS_GINTMSK, OTGFS_GINT_PTXFE, 0); } + + /* Write the next group of packets into the Tx FIFO */ + + ullvdbg("HPTXSTS: %08x chidx: %d avail: %d buflen: %d wrsize: %d\n", + regval, chidx, avail, chan->buflen, wrsize); + + stm32_gint_wrpacket(priv, chan->buffer, chidx, wrsize); } /******************************************************************************* @@ -2583,6 +2642,63 @@ static inline void stm32_hostinit_enable(void) } /******************************************************************************* + * Name: stm32_txfe_enable + * + * Description: + * Enable Tx FIFO empty interrupts. This is necessary when the entire + * transfer will not fit into Tx FIFO. The transfer will then be completed + * when the Tx FIFO is empty. NOTE: The Tx FIFO interrupt is disabled + * the the fifo empty interrupt handler when the transfer is complete. + * + * Input Parameters: + * priv - Driver state structure reference + * chidx - The channel that requires the Tx FIFO empty interrupt + * + * Returned Value: + * None + * + * Assumptions: + * Called from user task context. Interrupts must be disabled to assure + * exclusive access to the GINTMSK register. + * + *******************************************************************************/ + +static void stm32_txfe_enable(FAR struct stm32_usbhost_s *priv, int chidx) +{ + FAR struct stm32_chan_s *chan = &priv->chan[chidx]; + irqstate_t flags; + uint32_t regval; + + /* Disable all interrupts so that we have exclusive access to the GINTMSK + * (it would be sufficent just to disable the GINT interrupt). + */ + + flags = irqsave(); + + /* Should we enable the periodic or non-peridic Tx FIFO empty interrupts */ + + regval = stm32_getreg(STM32_OTGFS_GINTMSK); + switch (chan->eptype) + { + default: + case OTGFS_EPTYPE_CTRL: /* Non periodic transfer */ + case OTGFS_EPTYPE_BULK: + regval |= OTGFS_GINT_NPTXFE; + break; + + case OTGFS_EPTYPE_INTR: /* Periodic transfer */ + case OTGFS_EPTYPE_ISOC: + regval |= OTGFS_GINT_PTXFE; + break; + } + + /* Enable interrupts */ + + stm32_putreg(STM32_OTGFS_GINTMSK, regval); + irqrestore(flags); +} + +/******************************************************************************* * USB Host Controller Operations *******************************************************************************/ @@ -2612,7 +2728,7 @@ static inline void stm32_hostinit_enable(void) static int stm32_wait(FAR struct usbhost_driver_s *drvr, bool connected) { - struct stm32_usbhost_s *priv = (struct stm32_usbhost_s *)drvr; + FAR struct stm32_usbhost_s *priv = (FAR struct stm32_usbhost_s *)drvr; irqstate_t flags; /* Are we already connected? */ @@ -3291,7 +3407,7 @@ static int stm32_transfer(FAR struct usbhost_driver_s *drvr, usbhost_ep_t ep, struct stm32_usbhost_s *priv = (struct stm32_usbhost_s *)drvr; FAR struct stm32_chan_s *chan; unsigned int chidx = (unsigned int)ep; - int ret; + int ret = OK; uvdbg("chidx: %d buflen: %d\n", (unsigned int)ep, buflen); |