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fix a couple of nrf dcd issue

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- limit out xact dma to prevent usbd overflow in certain situation after
stalled
- drained already acked data when stalling an OUT endpoint
This commit is contained in:
hathach 2021-08-29 00:34:21 +07:00
parent be98cd56c7
commit 66c292e2ec
1 changed files with 17 additions and 5 deletions
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22
src/portable/nordic/nrf5x/dcd_nrf5x.c
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@ -206,7 +206,8 @@ static void xact_out_dma(uint8_t epnum)
}
else
{
xact_len = (uint8_t)NRF_USBD->SIZE.EPOUT[epnum];
// limit xact len to remaining length
xact_len = tu_min16((uint16_t) NRF_USBD->SIZE.EPOUT[epnum], xfer->total_len - xfer->actual_len);
// Trigger DMA move data from Endpoint -> SRAM
NRF_USBD->EPOUT[epnum].PTR = (uint32_t) xfer->buffer;
@ -480,10 +481,9 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
{
if ( xfer->data_received )
{
// Data may already be received previously
xfer->data_received = false;
// Data is already received previously
// start DMA to copy to SRAM
xfer->data_received = false;
xact_out_dma(epnum);
}
else
@ -505,7 +505,11 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr)
{
(void) rhport;
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
xfer_td_t* xfer = get_td(epnum, dir);
if ( epnum == 0 )
{
@ -513,6 +517,15 @@ void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr)
}else if (epnum != EP_ISO_NUM)
{
NRF_USBD->EPSTALL = (USBD_EPSTALL_STALL_Stall << USBD_EPSTALL_STALL_Pos) | ep_addr;
// Note: nRF can auto ACK packet OUT before get stalled.
// There maybe data in endpoint fifo already, we need to pull it out
if ( (dir == TUSB_DIR_OUT) && xfer->data_received )
{
TU_LOG_LOCATION();
xfer->data_received = false;
xact_out_dma(epnum);
}
}
__ISB(); __DSB();
@ -533,7 +546,6 @@ void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr)
NRF_USBD->DTOGGLE = (USBD_DTOGGLE_VALUE_Data0 << USBD_DTOGGLE_VALUE_Pos) | ep_addr;
// Write any value to SIZE register will allow nRF to ACK/accept data
// Drop any pending data
if (dir == TUSB_DIR_OUT) NRF_USBD->SIZE.EPOUT[epnum] = 0;
__ISB(); __DSB();