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- /*!
- \file drv_usbd_int.c
- \brief USB device mode interrupt routines
- \version 2023-06-30, V2.1.6, firmware for GD32F30x
- */
- /*
- Copyright (c) 2023, GigaDevice Semiconductor Inc.
- Redistribution and use in source and binary forms, with or without modification,
- are permitted provided that the following conditions are met:
- 1. Redistributions of source code must retain the above copyright notice, this
- list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above copyright notice,
- this list of conditions and the following disclaimer in the documentation
- and/or other materials provided with the distribution.
- 3. Neither the name of the copyright holder nor the names of its contributors
- may be used to endorse or promote products derived from this software without
- specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
- OF SUCH DAMAGE.
- */
- #include "usbd_conf.h"
- #include "drv_usbd_int.h"
- #include "usbd_transc.h"
- /* local function prototypes ('static') */
- static uint32_t usbd_int_epout (usb_core_driver *udev);
- static uint32_t usbd_int_epin (usb_core_driver *udev);
- static uint32_t usbd_int_rxfifo (usb_core_driver *udev);
- static uint32_t usbd_int_reset (usb_core_driver *udev);
- static uint32_t usbd_int_enumfinish (usb_core_driver *udev);
- static uint32_t usbd_int_suspend (usb_core_driver *udev);
- static uint32_t usbd_emptytxfifo_write (usb_core_driver *udev, uint32_t ep_num);
- static const uint8_t USB_SPEED[4] =
- {
- [DSTAT_EM_HS_PHY_30MHZ_60MHZ] = (uint8_t)USB_SPEED_HIGH,
- [DSTAT_EM_FS_PHY_30MHZ_60MHZ] = (uint8_t)USB_SPEED_FULL,
- [DSTAT_EM_FS_PHY_48MHZ] = (uint8_t)USB_SPEED_FULL,
- [DSTAT_EM_LS_PHY_6MHZ] = (uint8_t)USB_SPEED_LOW
- };
- /*!
- \brief USB device-mode interrupts global service routine handler
- \param[in] udev: pointer to USB device instance
- \param[out] none
- \retval none
- */
- void usbd_isr (usb_core_driver *udev)
- {
- if (HOST_MODE != (udev->regs.gr->GINTF & GINTF_COPM)) {
- uint32_t intr = udev->regs.gr->GINTF;
- intr &= udev->regs.gr->GINTEN;
- /* there are no interrupts, avoid spurious interrupt */
- if (!intr) {
- return;
- }
- /* OUT endpoints interrupts */
- if (intr & GINTF_OEPIF) {
- (void)usbd_int_epout (udev);
- }
- /* IN endpoints interrupts */
- if (intr & GINTF_IEPIF) {
- (void)usbd_int_epin (udev);
- }
- /* suspend interrupt */
- if (intr & GINTF_SP) {
- (void)usbd_int_suspend (udev);
- }
- /* wakeup interrupt */
- if (intr & GINTF_WKUPIF) {
- if(USBD_SUSPENDED == udev->dev.cur_status){
- /* inform upper layer by the resume event */
- udev->dev.cur_status = udev->dev.backup_status;
- }
- /* clear interrupt */
- udev->regs.gr->GINTF = GINTF_WKUPIF;
- }
- /* start of frame interrupt */
- if (intr & GINTF_SOF) {
- if (udev->dev.class_core->SOF) {
- (void)udev->dev.class_core->SOF(udev);
- }
- /* clear interrupt */
- udev->regs.gr->GINTF = GINTF_SOF;
- }
- /* receive FIFO not empty interrupt */
- if (intr & GINTF_RXFNEIF) {
- (void)usbd_int_rxfifo (udev);
- }
- /* USB reset interrupt */
- if (intr & GINTF_RST) {
- (void)usbd_int_reset (udev);
- }
- /* enumeration has been done interrupt */
- if (intr & GINTF_ENUMFIF) {
- (void)usbd_int_enumfinish (udev);
- }
- /* incomplete synchronization IN transfer interrupt*/
- if (intr & GINTF_ISOINCIF) {
- if (NULL != udev->dev.class_core->incomplete_isoc_in) {
- (void)udev->dev.class_core->incomplete_isoc_in(udev);
- }
- /* Clear interrupt */
- udev->regs.gr->GINTF = GINTF_ISOINCIF;
- }
- /* incomplete synchronization OUT transfer interrupt*/
- if (intr & GINTF_ISOONCIF) {
- if (NULL != udev->dev.class_core->incomplete_isoc_out) {
- (void)udev->dev.class_core->incomplete_isoc_out(udev);
- }
- /* clear interrupt */
- udev->regs.gr->GINTF = GINTF_ISOONCIF;
- }
- #ifdef VBUS_SENSING_ENABLED
- /* Session request interrupt */
- if (intr & GINTF_SESIF) {
- udev->regs.gr->GINTF = GINTF_SESIF;
- }
- /* OTG mode interrupt */
- if (intr & GINTF_OTGIF) {
- if(udev->regs.gr->GOTGINTF & GOTGINTF_SESEND) {
- }
- /* Clear OTG interrupt */
- udev->regs.gr->GINTF = GINTF_OTGIF;
- }
- #endif /* VBUS_SENSING_ENABLED */
- }
- }
- /*!
- \brief indicates that an OUT endpoint has a pending interrupt
- \param[in] udev: pointer to USB device instance
- \param[out] none
- \retval operation status
- */
- static uint32_t usbd_int_epout (usb_core_driver *udev)
- {
- uint32_t epintnum = 0U;
- uint8_t ep_num = 0U;
- for (epintnum = usb_oepintnum_read (udev); epintnum; epintnum >>= 1, ep_num++) {
- if (epintnum & 0x01U) {
- __IO uint32_t oepintr = usb_oepintr_read (udev, ep_num);
- /* transfer complete interrupt */
- if (oepintr & DOEPINTF_TF) {
- /* clear the bit in DOEPINTF for this interrupt */
- udev->regs.er_out[ep_num]->DOEPINTF = DOEPINTF_TF;
- /* inform upper layer: data ready */
- (void)usbd_out_transc (udev, ep_num);
- }
- /* setup phase finished interrupt (control endpoints) */
- if (oepintr & DOEPINTF_STPF) {
- /* inform the upper layer that a setup packet is available */
- (void)usbd_setup_transc (udev);
- udev->regs.er_out[ep_num]->DOEPINTF = DOEPINTF_STPF;
- }
- }
- }
- return 1U;
- }
- /*!
- \brief indicates that an IN endpoint has a pending interrupt
- \param[in] udev: pointer to USB device instance
- \param[out] none
- \retval operation status
- */
- static uint32_t usbd_int_epin (usb_core_driver *udev)
- {
- uint32_t epintnum = 0U;
- uint8_t ep_num = 0U;
- for (epintnum = usb_iepintnum_read (udev); epintnum; epintnum >>= 1, ep_num++) {
- if (epintnum & 0x1U) {
- __IO uint32_t iepintr = usb_iepintr_read (udev, ep_num);
- if (iepintr & DIEPINTF_TF) {
- udev->regs.er_in[ep_num]->DIEPINTF = DIEPINTF_TF;
- /* data transmission is completed */
- (void)usbd_in_transc (udev, ep_num);
- }
- if (iepintr & DIEPINTF_TXFE) {
- usbd_emptytxfifo_write (udev, (uint32_t)ep_num);
- udev->regs.er_in[ep_num]->DIEPINTF = DIEPINTF_TXFE;
- }
- }
- }
- return 1U;
- }
- /*!
- \brief handle the RX status queue level interrupt
- \param[in] udev: pointer to USB device instance
- \param[out] none
- \retval operation status
- */
- static uint32_t usbd_int_rxfifo (usb_core_driver *udev)
- {
- usb_transc *transc = NULL;
- uint8_t data_PID = 0U;
- uint32_t bcount = 0U;
- __IO uint32_t devrxstat = 0U;
- /* disable the Rx status queue non-empty interrupt */
- udev->regs.gr->GINTEN &= ~GINTEN_RXFNEIE;
- /* get the status from the top of the FIFO */
- devrxstat = udev->regs.gr->GRSTATP;
- uint8_t ep_num = (uint8_t)(devrxstat & GRSTATRP_EPNUM);
- transc = &udev->dev.transc_out[ep_num];
- bcount = (devrxstat & GRSTATRP_BCOUNT) >> 4U;
- data_PID = (uint8_t)((devrxstat & GRSTATRP_DPID) >> 15U);
- switch ((devrxstat & GRSTATRP_RPCKST) >> 17U) {
- case RSTAT_GOUT_NAK:
- break;
- case RSTAT_DATA_UPDT:
- if (bcount > 0U) {
- (void)usb_rxfifo_read (&udev->regs, transc->xfer_buf, (uint16_t)bcount);
- transc->xfer_buf += bcount;
- transc->xfer_count += bcount;
- }
- break;
- case RSTAT_XFER_COMP:
- /* trigger the OUT endpoint interrupt */
- break;
- case RSTAT_SETUP_COMP:
- /* trigger the OUT endpoint interrupt */
- break;
- case RSTAT_SETUP_UPDT:
- if ((0U == transc->ep_addr.num) && (8U == bcount) && (DPID_DATA0 == data_PID)) {
- /* copy the setup packet received in FIFO into the setup buffer in RAM */
- (void)usb_rxfifo_read (&udev->regs, (uint8_t *)&udev->dev.control.req, (uint16_t)bcount);
- transc->xfer_count += bcount;
- }
- break;
- default:
- break;
- }
- /* enable the Rx status queue level interrupt */
- udev->regs.gr->GINTEN |= GINTEN_RXFNEIE;
- return 1U;
- }
- /*!
- \brief handle USB reset interrupt
- \param[in] udev: pointer to USB device instance
- \param[out] none
- \retval status
- */
- static uint32_t usbd_int_reset (usb_core_driver *udev)
- {
- uint32_t i;
- /* clear the remote wakeup signaling */
- udev->regs.dr->DCTL &= ~DCTL_RWKUP;
- /* flush the Tx FIFO */
- (void)usb_txfifo_flush (&udev->regs, 0U);
- for (i = 0U; i < udev->bp.num_ep; i++) {
- udev->regs.er_in[i]->DIEPINTF = 0xFFU;
- udev->regs.er_out[i]->DOEPINTF = 0xFFU;
- }
- /* clear all pending device endpoint interrupts */
- udev->regs.dr->DAEPINT = 0xFFFFFFFFU;
- /* enable endpoint 0 interrupts */
- udev->regs.dr->DAEPINTEN = 1U | (1U << 16U);
- /* enable OUT endpoint interrupts */
- udev->regs.dr->DOEPINTEN = DOEPINTEN_STPFEN | DOEPINTEN_TFEN;
- /* enable IN endpoint interrupts */
- udev->regs.dr->DIEPINTEN = DIEPINTEN_TFEN;
- /* reset device address */
- udev->regs.dr->DCFG &= ~DCFG_DAR;
- /* configure endpoint 0 to receive SETUP packets */
- usb_ctlep_startout (udev);
- /* clear USB reset interrupt */
- udev->regs.gr->GINTF = GINTF_RST;
- udev->dev.transc_out[0] = (usb_transc) {
- .ep_type = USB_EPTYPE_CTRL,
- .max_len = USB_FS_EP0_MAX_LEN
- };
- (void)usb_transc_active (udev, &udev->dev.transc_out[0]);
- udev->dev.transc_in[0] = (usb_transc) {
- .ep_addr = {
- .dir = 1U
- },
- .ep_type = USB_EPTYPE_CTRL,
- .max_len = USB_FS_EP0_MAX_LEN
- };
- (void)usb_transc_active (udev, &udev->dev.transc_in[0]);
- /* upon reset call user call back */
- udev->dev.cur_status = (uint8_t)USBD_DEFAULT;
- return 1U;
- }
- /*!
- \brief handle USB speed enumeration finish interrupt
- \param[in] udev: pointer to USB device instance
- \param[out] none
- \retval status
- */
- static uint32_t usbd_int_enumfinish (usb_core_driver *udev)
- {
- uint8_t enum_speed = (uint8_t)((udev->regs.dr->DSTAT & DSTAT_ES) >> 1U);
- udev->regs.dr->DCTL &= ~DCTL_CGINAK;
- udev->regs.dr->DCTL |= DCTL_CGINAK;
- udev->regs.gr->GUSBCS &= ~GUSBCS_UTT;
- /* set USB turn-around time based on device speed and PHY interface */
- if (USB_SPEED[enum_speed] == (uint8_t)USB_SPEED_HIGH) {
- udev->bp.core_speed = (uint8_t)USB_SPEED_HIGH;
- udev->regs.gr->GUSBCS |= 0x09U << 10U;
- } else {
- udev->bp.core_speed = (uint8_t)USB_SPEED_FULL;
- udev->regs.gr->GUSBCS |= 0x05U << 10U;
- }
- /* clear interrupt */
- udev->regs.gr->GINTF = GINTF_ENUMFIF;
- return 1U;
- }
- /*!
- \brief USB suspend interrupt handler
- \param[in] udev: pointer to USB device instance
- \param[out] none
- \retval operation status
- */
- static uint32_t usbd_int_suspend (usb_core_driver *udev)
- {
- __IO uint8_t low_power = udev->bp.low_power;
- __IO uint8_t suspend = (uint8_t)(udev->regs.dr->DSTAT & DSTAT_SPST);
- __IO uint8_t is_configured = (udev->dev.cur_status == (uint8_t)USBD_CONFIGURED)? 1U : 0U;
- udev->dev.backup_status = udev->dev.cur_status;
- udev->dev.cur_status = (uint8_t)USBD_SUSPENDED;
- if (low_power && suspend && is_configured) {
- /* switch-off the OTG clocks */
- *udev->regs.PWRCLKCTL |= PWRCLKCTL_SUCLK | PWRCLKCTL_SHCLK;
- /* enter DEEP_SLEEP mode with LDO in low power mode */
- pmu_to_deepsleepmode(PMU_LDO_LOWPOWER, PMU_LOWDRIVER_DISABLE, WFI_CMD);
- }
- /* clear interrupt */
- udev->regs.gr->GINTF = GINTF_SP;
- return 1U;
- }
- /*!
- \brief check FIFO for the next packet to be loaded
- \param[in] udev: pointer to USB device instance
- \param[in] ep_num: endpoint identifier which is in (0..3)
- \param[out] none
- \retval status
- */
- static uint32_t usbd_emptytxfifo_write (usb_core_driver *udev, uint32_t ep_num)
- {
- uint32_t len;
- uint32_t word_count;
- usb_transc *transc = &udev->dev.transc_in[ep_num];
- len = transc->xfer_len - transc->xfer_count;
- /* get the data length to write */
- if (len > transc->max_len) {
- len = transc->max_len;
- }
- word_count = (len + 3U) / 4U;
- while (((udev->regs.er_in[ep_num]->DIEPTFSTAT & DIEPTFSTAT_IEPTFS) >= word_count) && \
- (transc->xfer_count < transc->xfer_len)) {
- len = transc->xfer_len - transc->xfer_count;
- if (len > transc->max_len) {
- len = transc->max_len;
- }
- /* write FIFO in word(4bytes) */
- word_count = (len + 3U) / 4U;
- /* write the FIFO */
- (void)usb_txfifo_write (&udev->regs, transc->xfer_buf, (uint8_t)ep_num, (uint16_t)len);
- transc->xfer_buf += len;
- transc->xfer_count += len;
- if (transc->xfer_count == transc->xfer_len) {
- /* disable the device endpoint FIFO empty interrupt */
- udev->regs.dr->DIEPFEINTEN &= ~(0x01U << ep_num);
- }
- }
- return 1U;
- }
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