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stm32f4: Implement interrupt handling for IN packets (first signs of life).

This commit is contained in:
William D. Jones 2019-01-22 23:51:58 -05:00
parent 43c890615a
commit 51c0ce3f6b
1 changed files with 40 additions and 1 deletions
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41
src/portable/stm/stm32f4/dcd_stm32f4.c
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@ -101,7 +101,12 @@ static void end_of_reset(void) {
// On current silicon on the Full Speed core, speed is fixed to Full Speed.
// However, keep for debugging and in case Low Speed is ever supported.
uint32_t enum_spd = (dev->DSTS & USB_OTG_DSTS_ENUMSPD_Msk) >> USB_OTG_DSTS_ENUMSPD_Pos;
// Maximum packet size for EP 0 is set for both directions by writing
// DIEPCTL.
in_ep[0].DIEPCTL |= enum_spd;
xfer_status[0][TUSB_DIR_OUT].max_size = 64;
xfer_status[0][TUSB_DIR_IN].max_size = 64;
}
@ -221,7 +226,7 @@ bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * desc_edpt)
bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes)
{
(void) rhport;
//USB_OTG_DeviceTypeDef * dev = DEVICE_BASE;
USB_OTG_DeviceTypeDef * dev = DEVICE_BASE;
//USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE;
USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE;
@ -247,6 +252,7 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
in_ep[epnum].DIEPTSIZ = (num_packets << USB_OTG_DIEPTSIZ_PKTCNT_Pos) | \
((total_bytes & USB_OTG_DIEPTSIZ_XFRSIZ_Msk) << USB_OTG_DIEPTSIZ_XFRSIZ_Pos);
in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_EPENA | USB_OTG_DIEPCTL_CNAK;
dev->DIEPEMPMSK |= (1 << epnum);
} else {
}
@ -376,8 +382,10 @@ USB_TRFAIL1_PERR_6, USB_TRFAIL1_PERR_7, USB_UPRSM, USB_WAKEUP */
void OTG_FS_IRQHandler(void) {
USB_OTG_DeviceTypeDef * dev = DEVICE_BASE;
USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE;
USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE;
uint32_t * rx_fifo = FIFO_BASE(0);
uint32_t int_status = USB_OTG_FS->GINTSTS;
if(int_status & USB_OTG_GINTSTS_USBRST) {
@ -457,6 +465,37 @@ void OTG_FS_IRQHandler(void) {
}
}
// IN endpoint interrupt handling.
if(int_status & USB_OTG_GINTSTS_IEPINT) {
// DAINT for a given EP clears when DIEPINTx is cleared.
// IEPINT will be cleared when DAINT's out bits are cleared.
for(uint8_t n = 0; n < 4; n++) {
xfer_ctl_t * xfer = XFER_CTL_BASE(n, TUSB_DIR_IN);
uint32_t * tx_fifo = FIFO_BASE(n);
if(dev->DAINT & (1 << (USB_OTG_DAINT_IEPINT_Pos + n))) {
// IN XFER complete.
if(in_ep[n].DIEPINT & USB_OTG_DIEPINT_XFRC) {
in_ep[n].DIEPINT = USB_OTG_DIEPINT_XFRC;
dcd_event_xfer_complete(0, n | TUSB_DIR_IN_MASK, xfer->total_len, XFER_RESULT_SUCCESS, true);
}
// XFER FIFO empty
if(in_ep[n].DIEPINT & USB_OTG_DIEPINT_TXFE) {
in_ep[n].DIEPINT = USB_OTG_DIEPINT_TXFE;
uint16_t remaining = (in_ep[n].DIEPTSIZ & USB_OTG_DIEPTSIZ_XFRSIZ_Msk) >> USB_OTG_DIEPTSIZ_XFRSIZ_Pos;
xfer->queued_len = xfer->total_len - remaining;
for(uint8_t i = 0; i < xfer->max_size; i++) {
(* tx_fifo) = xfer->buffer[xfer->queued_len + i];
}
}
}
}
}
}