SN32F24xB: Implement alternative handling of ACK/NAK and fix CONSOLE support
This commit is contained in:
stdvar
Dimitris Mantzouranis
parent
52acdb5527
commit
d32df9caa9
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@ -51,6 +51,7 @@ USBDriver USBD1;
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/*===========================================================================*/
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/*===========================================================================*/
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static int address;
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static int address;
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static uint8_t nakcnt[USB_MAX_ENDPOINTS + 1] = {0, 0, 0, 0, 0};
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/**
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/**
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* @brief EP0 state.
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* @brief EP0 state.
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@ -82,6 +83,21 @@ static const USBEndpointConfig ep0config = {
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&ep0_state.out
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&ep0_state.out
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};
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};
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void rgb_matrix_toggle(void);
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void rgb_matrix_toggle(void);
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void handleACK(USBDriver* usbp, usbep_t ep);
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void handleNAK(USBDriver* usbp, usbep_t ep);
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#if (USB_USE_WAIT == TRUE) || defined(__DOXYGEN__)
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#define _usb_isr_invoke_tx_complete_cb(usbp, ep) { \
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(usbp)->transmitting &= ~(1 << (ep)); \
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osalSysLockFromISR(); \
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osalThreadResumeI(&(usbp)->epc[ep]->in_state->thread, MSG_OK); \
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osalSysUnlockFromISR(); \
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}
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#else
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#define _usb_isr_invoke_tx_complete_cb(usbp, ep) { \
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(usbp)->transmitting &= ~(1 << (ep)); \
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}
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#endif
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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@ -349,181 +365,51 @@ static void usb_lld_serve_interrupt(USBDriver *usbp)
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/////////////////////////////////////////////////
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/////////////////////////////////////////////////
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else if (iwIntFlag & (mskEP4_ACK|mskEP3_ACK|mskEP2_ACK|mskEP1_ACK))
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else if (iwIntFlag & (mskEP4_ACK|mskEP3_ACK|mskEP2_ACK|mskEP1_ACK))
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{
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{
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usbep_t ep = USB_EP1;
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uint8_t out = 0;
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uint8_t cnt = 0;
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// Determine the interrupting endpoint, direction, and clear the interrupt flag
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// Determine the interrupting endpoint, direction, and clear the interrupt flag
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if(iwIntFlag & mskEP1_ACK)
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if(iwIntFlag & mskEP1_ACK)
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{
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{
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__USB_CLRINSTS(mskEP1_ACK);
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__USB_CLRINSTS(mskEP1_ACK);
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ep = USB_EP1;
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handleACK(usbp, USB_EP1);
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out = ( SN_USB->CFG & mskEP1_DIR ) == mskEP1_DIR;
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cnt = SN_USB->EP1CTL & mskEPn_CNT;
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}
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}
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else if(iwIntFlag & mskEP2_ACK)
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if(iwIntFlag & mskEP2_ACK)
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{
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{
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__USB_CLRINSTS(mskEP2_ACK);
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__USB_CLRINSTS(mskEP2_ACK);
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ep = USB_EP2;
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handleACK(usbp, USB_EP2);
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out = ( SN_USB->CFG & mskEP2_DIR ) == mskEP2_DIR;
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cnt = SN_USB->EP2CTL & mskEPn_CNT;
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}
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}
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else if(iwIntFlag & mskEP3_ACK)
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if(iwIntFlag & mskEP3_ACK)
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{
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{
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__USB_CLRINSTS(mskEP3_ACK);
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__USB_CLRINSTS(mskEP3_ACK);
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ep = USB_EP3;
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handleACK(usbp, USB_EP3);
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out = ( SN_USB->CFG & mskEP3_DIR ) == mskEP3_DIR;
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cnt = SN_USB->EP3CTL & mskEPn_CNT;
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}
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}
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else if(iwIntFlag & mskEP4_ACK)
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if(iwIntFlag & mskEP4_ACK)
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{
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{
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__USB_CLRINSTS(mskEP4_ACK);
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__USB_CLRINSTS(mskEP4_ACK);
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ep = USB_EP4;
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handleACK(usbp, USB_EP4);
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out = ( SN_USB->CFG & mskEP4_DIR ) == mskEP4_DIR;
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cnt = SN_USB->EP4CTL & mskEPn_CNT;
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}
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// Get the endpoint config and state
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const USBEndpointConfig *epcp = usbp->epc[ep];
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USBInEndpointState *isp = epcp->in_state;
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USBOutEndpointState *osp = epcp->out_state;
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// Process based on endpoint direction
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if(out)
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{
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// Read size of received data
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n = cnt;
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if (n > epcp->out_maxsize)
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n = epcp->out_maxsize;
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//state is NAK already
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//Just being paranoid here. keep here while debugging EP handling issue
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//TODO: clean it up when packets are properly handled
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if (epcp->out_state->rxsize >= n) {
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//we are ok to copy n bytes to buf
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sn32_usb_read_fifo(ep, osp->rxbuf, n, true);
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epcp->out_state->rxsize -= n;
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}
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else if (epcp->out_state->rxsize > 0) {
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//we dont have enough buffer to receive n bytes
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//copy only size availabe on buffer
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n = epcp->out_state->rxsize;
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sn32_usb_read_fifo(ep, osp->rxbuf, n, true);
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epcp->out_state->rxsize -= n;
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}
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else {
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//well buffer is 0 size. strange. do nothing.
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n = 0;
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}
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osp->rxbuf += n;
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epcp->out_state->rxcnt += n;
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if (epcp->out_state->rxpkts > 0) {
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epcp->out_state->rxpkts -= 1;
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}
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if (n < epcp->out_maxsize || epcp->out_state->rxpkts == 0)
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{
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_usb_isr_invoke_out_cb(usbp, ep);
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}
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else
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{
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//not done. keep on receiving
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USB_EPnAck(ep, 0);
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}
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}
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else
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{
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// Process transmit queue
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isp->txcnt += isp->txlast;
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n = isp->txsize - isp->txcnt;
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if (n > 0)
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{
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/* Transfer not completed, there are more packets to send.*/
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if (n > epcp->in_maxsize)
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{
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n = epcp->in_maxsize;
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}
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/* Writes the packet from the defined buffer.*/
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isp->txbuf += isp->txlast;
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isp->txlast = n;
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sn32_usb_write_fifo(ep, isp->txbuf, n, true);
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USB_EPnAck(ep, n);
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}
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else
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{
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//USB_EPnNak(ep); //not needed here it is autoreset to NAK already
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_usb_isr_invoke_in_cb(usbp, ep);
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}
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}
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}
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}
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}
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else if (iwIntFlag & (mskEP4_NAK|mskEP3_NAK|mskEP2_NAK|mskEP1_NAK))
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else if (iwIntFlag & (mskEP4_NAK|mskEP3_NAK|mskEP2_NAK|mskEP1_NAK))
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{
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{
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usbep_t ep = USB_EP1;
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uint8_t out = 0;
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//uint8_t cnt = 0;
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// Determine the interrupting endpoint, direction, and clear the interrupt flag
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// Determine the interrupting endpoint, direction, and clear the interrupt flag
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if (iwIntFlag & mskEP1_NAK)
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if (iwIntFlag & mskEP1_NAK)
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{
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{
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__USB_CLRINSTS(mskEP1_NAK);
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__USB_CLRINSTS(mskEP1_NAK);
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ep = USB_EP1;
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handleNAK(usbp, USB_EP1);
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out = ( SN_USB->CFG & mskEP1_DIR ) == mskEP1_DIR;
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//cnt = SN_USB->EP1CTL & mskEPn_CNT;
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}
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}
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if (iwIntFlag & mskEP2_NAK)
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if (iwIntFlag & mskEP2_NAK)
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{
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{
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__USB_CLRINSTS(mskEP2_NAK);
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__USB_CLRINSTS(mskEP2_NAK);
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ep = USB_EP2;
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handleNAK(usbp, USB_EP2);
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out = ( SN_USB->CFG & mskEP2_DIR ) == mskEP2_DIR;
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//cnt = SN_USB->EP2CTL & mskEPn_CNT;
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}
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}
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if (iwIntFlag & mskEP3_NAK)
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if (iwIntFlag & mskEP3_NAK)
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{
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{
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__USB_CLRINSTS(mskEP3_NAK);
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__USB_CLRINSTS(mskEP3_NAK);
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ep = USB_EP3;
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handleNAK(usbp, USB_EP3);
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out = ( SN_USB->CFG & mskEP3_DIR ) == mskEP3_DIR;
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//cnt = SN_USB->EP3CTL & mskEPn_CNT;
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}
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}
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if (iwIntFlag & mskEP4_NAK)
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if (iwIntFlag & mskEP4_NAK)
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{
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{
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__USB_CLRINSTS(mskEP4_NAK);
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__USB_CLRINSTS(mskEP4_NAK);
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ep = USB_EP4;
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handleNAK(usbp, USB_EP4);
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out = ( SN_USB->CFG & mskEP4_DIR ) == mskEP4_DIR;
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//cnt = SN_USB->EP4CTL & mskEPn_CNT;
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}
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}
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//handle it properly
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if(out)
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{
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// By acking next OUT token from host we are allowing reception
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// of the data from host
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USB_EPnAck(ep, 0);
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}
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else
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{
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// This is not a retransmission
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// NAK happens when host polls and device has nothing to send
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// Callback below is really redundant unless it serves for syncronization of some sort
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// Hera are test observations:
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// - if both NAK and callback are called - keyboard works and orgb works
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// - if only callback is called - orgb doesn't work, keyboard works
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// - if only NAK is called - orgb doesn't work, keyboard haven't tested
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// - if nothing is called - orgb works, keyboard occasionally locks up
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// lock up shows up as:
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// - usb packet received when key is pressed in
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// - but usb packet for key is released
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// - thus OS treats it as pressed key
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USB_EPnNak(ep);
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_usb_isr_invoke_in_cb(usbp, ep);
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}
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}
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}
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/////////////////////////////////////////////////
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/////////////////////////////////////////////////
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@ -537,6 +423,193 @@ static void usb_lld_serve_interrupt(USBDriver *usbp)
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}
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}
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}
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}
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void handleACK(USBDriver* usbp, usbep_t ep) {
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uint8_t out = 0;
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uint8_t cnt = 0;
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size_t n;
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if(ep == USB_EP1)
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{
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out = ( SN_USB->CFG & mskEP1_DIR ) == mskEP1_DIR;
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cnt = SN_USB->EP1CTL & mskEPn_CNT;
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}
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else if(ep == USB_EP2)
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{
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out = ( SN_USB->CFG & mskEP2_DIR ) == mskEP2_DIR;
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cnt = SN_USB->EP2CTL & mskEPn_CNT;
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}
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else if(ep == USB_EP3)
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{
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out = ( SN_USB->CFG & mskEP3_DIR ) == mskEP3_DIR;
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cnt = SN_USB->EP3CTL & mskEPn_CNT;
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}
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else if(ep == USB_EP4)
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{
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out = ( SN_USB->CFG & mskEP4_DIR ) == mskEP4_DIR;
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cnt = SN_USB->EP4CTL & mskEPn_CNT;
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}
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else {
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return;
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}
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nakcnt[ep] = 0;
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// Get the endpoint config and state
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const USBEndpointConfig *epcp = usbp->epc[ep];
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USBInEndpointState *isp = epcp->in_state;
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USBOutEndpointState *osp = epcp->out_state;
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// Process based on endpoint direction
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if(out)
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{
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// Read size of received data
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n = cnt;
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if (n > epcp->out_maxsize)
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n = epcp->out_maxsize;
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//state is NAK already
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//Just being paranoid here. keep here while debugging EP handling issue
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//TODO: clean it up when packets are properly handled
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if (epcp->out_state->rxsize >= n) {
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//we are ok to copy n bytes to buf
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sn32_usb_read_fifo(ep, osp->rxbuf, n, true);
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epcp->out_state->rxsize -= n;
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}
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else if (epcp->out_state->rxsize > 0) {
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//we dont have enough buffer to receive n bytes
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//copy only size availabe on buffer
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n = epcp->out_state->rxsize;
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sn32_usb_read_fifo(ep, osp->rxbuf, n, true);
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epcp->out_state->rxsize -= n;
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}
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else {
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//well buffer is 0 size. strange. do nothing.
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n = 0;
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}
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osp->rxbuf += n;
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epcp->out_state->rxcnt += n;
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if (epcp->out_state->rxpkts > 0) {
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epcp->out_state->rxpkts -= 1;
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}
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if (n < epcp->out_maxsize || epcp->out_state->rxpkts == 0)
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{
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_usb_isr_invoke_out_cb(usbp, ep);
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}
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else
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{
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//not done. keep on receiving
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USB_EPnAck(ep, 0);
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}
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}
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else
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{
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// Process transmit queue
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isp->txcnt += isp->txlast;
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n = isp->txsize - isp->txcnt;
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if (n > 0)
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{
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/* Transfer not completed, there are more packets to send.*/
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if (n > epcp->in_maxsize)
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{
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n = epcp->in_maxsize;
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}
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/* Writes the packet from the defined buffer.*/
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isp->txbuf += isp->txlast;
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isp->txlast = n;
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sn32_usb_write_fifo(ep, isp->txbuf, n, true);
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USB_EPnAck(ep, n);
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}
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else
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{
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//USB_EPnNak(ep); //not needed here it is autoreset to NAK already
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_usb_isr_invoke_in_cb(usbp, ep);
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}
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}
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}
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void handleNAK(USBDriver *usbp, usbep_t ep) {
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uint8_t out = 0;
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//handle it properly
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if (ep == USB_EP1) {
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out = ( SN_USB->CFG & mskEP1_DIR ) == mskEP1_DIR;
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}
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else if (ep == USB_EP2) {
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out = ( SN_USB->CFG & mskEP2_DIR ) == mskEP2_DIR;
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}
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else if (ep == USB_EP3) {
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out = ( SN_USB->CFG & mskEP3_DIR ) == mskEP3_DIR;
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}
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else if (ep == USB_EP4) {
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out = ( SN_USB->CFG & mskEP4_DIR ) == mskEP4_DIR;
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}
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else {
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return;
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}
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if(out)
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{
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||||||
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// By acking next OUT token from host we are allowing reception
|
||||||
|
// of the data from host
|
||||||
|
USB_EPnAck(ep, 0);
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
// This is not a retransmission, retransmission is transparent and happens on phy layer
|
||||||
|
// NAK happens when host polls IN EP and device has nothing to send
|
||||||
|
// It has been observed that sometimes USB phy doesn't generate ACK (unknown why)
|
||||||
|
// (count ACK interrupts didn't match count of usb_lld_start_in calls per EP)
|
||||||
|
// However while USB transmitting and qmk thread wants to send another packet qmk goes to
|
||||||
|
// infinite sleep, expecting that successfull USB transmission will wake it up
|
||||||
|
// If USB transmission never completes (no ACK) then qmk never wakes up and keyboard locks up
|
||||||
|
// To prevent this every NAK (1ms or 8ms depending on host poll interval) was calling
|
||||||
|
// callbacks and wake up function to wake up qmk thread, however packet was not delivered to host
|
||||||
|
// (for unknown reason) and thus we have seen:
|
||||||
|
// 1) stuck keypresses when usb packets to press key delivered but key release packet lost
|
||||||
|
// 2) untyped key when usb packet to press key was lost but key release packet delivered
|
||||||
|
// Because callback was called every NAK some qmk features didnt work such as CONSOLE
|
||||||
|
// since callback might release buffers and endup in deadlock via disabled interrupts
|
||||||
|
// callback for keyboard is empty thus its repated calling is harmless
|
||||||
|
#if defined(SN32_USB_ORIGINAL_NAK_HANDLING)
|
||||||
|
_usb_isr_invoke_in_cb(usbp, ep);
|
||||||
|
#else
|
||||||
|
//To fake missing ACK we can send 0 sized packet
|
||||||
|
//however (again for unknown reason) packets now being delivered to host as well!
|
||||||
|
//- value 2 has been selected to allow at least 2 NAK delivery (2ms or 16ms depending on
|
||||||
|
//host polling interval) between moment qmk called start_in and moment USB phy actually
|
||||||
|
//started transmission
|
||||||
|
//- value 10 was selected arbitrary.
|
||||||
|
//- values 3-10 we are delivering 0 sized packet trying to get at least one ack
|
||||||
|
if (nakcnt[ep] > 0) {
|
||||||
|
//qmk called start_in
|
||||||
|
if (nakcnt[ep] > 10) {
|
||||||
|
//11-....
|
||||||
|
//consider packet undeliverable but ack it to the qmk
|
||||||
|
nakcnt[ep] = 0;
|
||||||
|
_usb_isr_invoke_in_cb(usbp, ep);
|
||||||
|
}
|
||||||
|
else if (nakcnt[ep] > 2) {
|
||||||
|
//3-10
|
||||||
|
nakcnt[ep]++;
|
||||||
|
USB_EPnAck(ep, 0);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
//1-2
|
||||||
|
//give it sometime to deliver the packet
|
||||||
|
nakcnt[ep]++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
/*===========================================================================*/
|
/*===========================================================================*/
|
||||||
/* Driver interrupt handlers and threads. */
|
/* Driver interrupt handlers and threads. */
|
||||||
/*===========================================================================*/
|
/*===========================================================================*/
|
||||||
|
|
@ -855,7 +928,7 @@ void usb_lld_start_in(USBDriver *usbp, usbep_t ep)
|
||||||
//who handles 0 packet ack on setup?
|
//who handles 0 packet ack on setup?
|
||||||
n = isp->txsize;
|
n = isp->txsize;
|
||||||
|
|
||||||
if((n > 0) || (ep == 0))
|
if((n >= 0) || (ep == 0))
|
||||||
{
|
{
|
||||||
if (n > (size_t)usbp->epc[ep]->in_maxsize)
|
if (n > (size_t)usbp->epc[ep]->in_maxsize)
|
||||||
n = (size_t)usbp->epc[ep]->in_maxsize;
|
n = (size_t)usbp->epc[ep]->in_maxsize;
|
||||||
|
|
@ -864,6 +937,7 @@ void usb_lld_start_in(USBDriver *usbp, usbep_t ep)
|
||||||
|
|
||||||
sn32_usb_write_fifo(ep, isp->txbuf, n, false);
|
sn32_usb_write_fifo(ep, isp->txbuf, n, false);
|
||||||
|
|
||||||
|
nakcnt[ep] = 1;
|
||||||
USB_EPnAck(ep, n);
|
USB_EPnAck(ep, n);
|
||||||
}
|
}
|
||||||
else
|
else
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue