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/*!
\file usbd_int.c
\brief USB device power interrupt routines
*/
/*
Copyright (C) 2017 GigaDevice
2017-02-10, V1.0.0, firmware for GD32F30x
*/
#include "usbd_int.h"
extern uint32_t g_interrupt_mask;
extern __IO uint8_t g_suspend_enabled;
extern __IO uint8_t g_remote_wakeup_on;
extern __IO uint8_t g_ESOF_count;
#ifdef LPM_ENABLED
__IO uint32_t L1_remote_wakeup = 0U;
__IO uint32_t L1_resume = 0U;
__IO uint32_t besl = 0U;
#endif /* LPM_ENABLED */
static uint8_t usbd_intf_lpst (usbd_core_handle_struct *pudev);
static uint8_t usbd_intf_sof (usbd_core_handle_struct *pudev);
static uint8_t usbd_intf_esof (usbd_core_handle_struct *pudev);
static uint8_t usbd_intf_reset (usbd_core_handle_struct *pudev);
static uint8_t usbd_intf_suspend (usbd_core_handle_struct *pudev);
static uint8_t usbd_intf_wakeup (usbd_core_handle_struct *pudev);
/*!
\brief USB interrupt events service routine
\param[in] none
\param[out] none
\retval none
*/
void usbd_isr (void)
{
__IO uint16_t interrupt_flag = 0U;
__IO uint16_t ctlr = 0U;
interrupt_flag = USBD_REG_GET(USBD_INTF);
if (g_interrupt_mask & INTF_STIF & interrupt_flag) {
/* the endpoint successful transfer interrupt service */
usbd_intf_lpst(&usb_device_dev);
}
if (g_interrupt_mask & INTF_WKUPIF & interrupt_flag) {
/* clear wakeup interrupt flag in INTF */
USBD_REG_SET(USBD_INTF, (uint16_t)CLR_WKUPIF);
/* USB wakeup interrupt handle */
usbd_intf_wakeup(&usb_device_dev);
#ifdef LPM_ENABLED
/* clear L1 remote wakeup flag */
L1_remote_wakeup = 0;
#endif /* LPM_ENABLED */
}
if (g_interrupt_mask & INTF_SPSIF & interrupt_flag) {
if(!(USBD_REG_GET(USBD_CTL) & CTL_RSREQ)) {
/* process library core layer suspend routine*/
usbd_intf_suspend(&usb_device_dev);
/* clear of suspend interrupt flag bit must be done after setting of CTLR_SETSPS */
USBD_REG_SET(USBD_INTF, (uint16_t)CLR_SPSIF);
}
}
if (g_interrupt_mask & INTF_SOFIF & interrupt_flag) {
/* clear SOF interrupt flag in INTF */
USBD_REG_SET(USBD_INTF, (uint16_t)CLR_SOFIF);
/* USB SOF interrupt handle */
usbd_intf_sof(&usb_device_dev);
}
if (g_interrupt_mask & INTF_ESOFIF & interrupt_flag) {
/* clear ESOF interrupt flag in INTF */
USBD_REG_SET(USBD_INTF, (uint16_t)CLR_ESOFIF);
/* USB ESOF interrupt handle */
usbd_intf_esof(&usb_device_dev);
}
if (g_interrupt_mask & INTF_RSTIF & interrupt_flag) {
/* clear reset interrupt flag in INTF */
USBD_REG_SET(USBD_INTF, (uint16_t)CLR_RSTIF);
/* USB reset interrupt handle */
usbd_intf_reset(&usb_device_dev);
}
#ifdef LPM_ENABLED
if (g_interrupt_mask & INTF_L1REQ & interrupt_flag) {
/* clear L1 ST bit in LPM INTF */
USBD_REG_SET(USBD_INTF, CLR_L1REQ);
/* read BESL field from subendpoint0 register which coressponds to HIRD parameter in LPM spec */
besl = (USBD_REG_GET(USBD_LPMCS) & LPMCS_BLSTAT) >> 4;
/* read BREMOTEWAKE bit from subendpoint0 register which corresponding to bRemoteWake bit in LPM request */
L1_remote_wakeup = (USBD_REG_GET(USBD_LPMCS) & LPMCS_REMWK) >> 8;
/* process USB device core layer suspend routine */
/* enter USB model in suspend and system in low power mode (DEEP_SLEEP mode) */
usbd_intf_suspend(&usb_device_dev);
}
#endif /* LPM_ENABLED */
}
/*!
\brief handle USB low priority successful transfer event
\param[in] pudev: pointer to USB device instance
\param[out] none
\retval USB device operation status
*/
static uint8_t usbd_intf_lpst (usbd_core_handle_struct *pudev)
{
uint8_t ep_num = 0U;
__IO uint16_t int_status = 0U;
__IO uint16_t ep_value = 0U;
usb_ep_struct *ep = NULL;
/* wait till interrupts are not pending */
while (0U != ((int_status = USBD_REG_GET(USBD_INTF)) & (uint16_t)INTF_STIF)) {
/* get endpoint number and the value of control and state register */
ep_num = (uint8_t)(int_status & INTF_EPNUM);
ep_value = USBD_REG_GET(USBD_EPxCS(ep_num));
if (0U == (int_status & INTF_DIR)) {
/* handle the in direction transaction */
ep = &(pudev->in_ep[ep_num]);
if (0U != (ep_value & EPxCS_TX_ST)) {
/* clear successful transmit interrupt flag */
USBD_ENDP_TX_STAT_CLEAR(ep_num);
/* just handle single buffer situation */
ep->trs_count = (pbuf_reg + ep_num)->tx_count & EPTCNT_CNT;
/* maybe mutiple packets */
ep->trs_buf += ep->trs_count;
usbd_in_transaction(pudev, ep_num);
}
} else {
/* handle the out direction transaction */
uint16_t count = 0U;
ep = &(pudev->out_ep[ep_num]);
if (0U != (ep_value & EPxCS_RX_ST)) {
/* clear successful receive interrupt flag */
USBD_ENDP_RX_STAT_CLEAR(ep_num);
count = (pbuf_reg + ep_num)->rx_count & (uint16_t)EPRCNT_CNT;
if (0U != count) {
if (0U != (ep_value & EPxCS_SETUP)) {
/* handle setup packet */
usbd_ep_data_read(&(pudev->setup_packet[0]), pbuf_reg->rx_addr, count);
/* enter setup status */
usbd_setup_transaction(pudev);
return USBD_OK;
} else {
usbd_ep_data_read(ep->trs_buf, (pbuf_reg + ep_num)->rx_addr, count);
}
}
/* maybe mutiple packets */
ep->trs_count += count;
ep->trs_buf += count;
ep->trs_len -= count;
if ((0U == ep->trs_len) || (count < ep->maxpacket)) {
/* enter data OUT status */
usbd_out_transaction(pudev, ep_num);
ep->trs_count = 0U;
} else {
usbd_ep_rx(pudev, ep_num, ep->trs_buf, (uint16_t)ep->trs_len);
}
}
}
}
return USBD_OK;
}
/*!
\brief handle USB SOF event
\param[in] pudev: pointer to USB device instance
\param[out] none
\retval USB device operation status
*/
static uint8_t usbd_intf_sof (usbd_core_handle_struct *pudev)
{
/* if necessary, user can add code here */
if (NULL != usbd_int_fops) {
usbd_int_fops->SOF(pudev);
}
return USBD_OK;
}
/*!
\brief handle USB expect SOF event
\param[in] pudev: pointer to USB device instance
\param[out] none
\retval USB device operation status
*/
static uint8_t usbd_intf_esof (usbd_core_handle_struct *pudev)
{
/* control resume time by ESOFs */
if (g_ESOF_count > 0U) {
g_ESOF_count--;
if (0U == g_ESOF_count) {
if (1U == g_remote_wakeup_on) {
USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) & ~CTL_RSREQ);
g_remote_wakeup_on = 0U;
} else {
USBD_REG_SET(USBD_CTL, USBD_REG_GET(USBD_CTL) | CTL_RSREQ);
g_ESOF_count = 3U;
g_remote_wakeup_on = 1U;
}
}
}
return USBD_OK;
}
/*!
\brief handle USB reset event
\param[in] pudev: pointer to USB device instance
\param[out] none
\retval USB device operation status
*/
static uint8_t usbd_intf_reset (usbd_core_handle_struct *pudev)
{
// uint8_t i;
g_free_buf_addr = ENDP_BUF_ADDR;
/* configure endpoint 0 buffer */
pbuf_reg->tx_addr = (uint16_t)g_free_buf_addr;
g_free_buf_addr += USBD_EP0_MAX_SIZE;
pbuf_reg->rx_addr = (uint16_t)g_free_buf_addr;
g_free_buf_addr += USBD_EP0_MAX_SIZE;
/* configure endpoint 0 Rx count */
pbuf_reg->rx_count = ((USBD_EP0_MAX_SIZE << 5) - 1) | 0x8000;
pudev->in_ep[EP0].maxpacket = USBD_EP0_MAX_SIZE;
pudev->out_ep[EP0].maxpacket = USBD_EP0_MAX_SIZE;
USBD_REG_SET(USBD_EPxCS(EP0), EP_CONTROL | EPRX_VALID | EPTX_NAK);
/* set device address as default address 0 */
USBD_REG_SET(USBD_DADDR, DADDR_USBEN);
pudev->status = USBD_DEFAULT;
return USBD_OK;
}
/*!
\brief handle USB suspend event
\param[in] pudev: pointer to USB device instance
\param[out] none
\retval USB device operation status
*/
static uint8_t usbd_intf_suspend (usbd_core_handle_struct *pudev)
{
/* store the device current status */
pudev->prev_status = pudev->status;
/* set device in suspended state */
pudev->status = USBD_SUSPENDED;
/* enter USB in suspend and mcu system in low power mode */
if (g_suspend_enabled) {
usbd_suspend();
} else {
/* if not possible then resume after xx ms */
g_ESOF_count = 3U;
}
return USBD_OK;
}
/*!
\brief handle USB wakeup event
\param[in] pudev: pointer to USB device instance
\param[out] none
\retval USB device operation status
*/
static uint8_t usbd_intf_wakeup (usbd_core_handle_struct *pudev)
{
/* restore the old status */
pudev->status = pudev->prev_status;
#ifdef LPM_ENABLED
if ((0U == g_remote_wakeup_on) && (0U == L1_resume)) {
resume_mcu();
} else if (1U == g_remote_wakeup_on) {
/* no operation */
} else {
L1_resume = 0U;
}
#else
if (0U == g_remote_wakeup_on) {
resume_mcu();
}
#endif /* LPM_ENABLED */
return USBD_OK;
}
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