/**
* @brief Enables an endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*
* @notapi
*/
void usb_lld_init_endpoint(USBDriver *usbp, usbep_t ep) {
uint16_t nblocks, epr;
stm32_usb_descriptor_t *dp;
const USBEndpointConfig *epcp = usbp->epc[ep];
/* Setting the endpoint type.*/
switch (epcp->ep_mode & USB_EP_MODE_TYPE) {
case USB_EP_MODE_TYPE_ISOC:
epr = EPR_EP_TYPE_ISO;
break;
case USB_EP_MODE_TYPE_BULK:
epr = EPR_EP_TYPE_BULK;
break;
case USB_EP_MODE_TYPE_INTR:
epr = EPR_EP_TYPE_INTERRUPT;
break;
default:
epr = EPR_EP_TYPE_CONTROL;
}
/* IN endpoint initially in NAK mode.*/
if (epcp->in_cb != NULL)
epr |= EPR_STAT_TX_NAK;
/* OUT endpoint initially in NAK mode.*/
if (epcp->out_cb != NULL)
epr |= EPR_STAT_RX_NAK;
/* EPxR register setup.*/
EPR_SET(ep, epr | ep);
EPR_TOGGLE(ep, epr);
/* Endpoint size and address initialization.*/
if (epcp->out_maxsize > 62)
nblocks = (((((epcp->out_maxsize - 1) | 0x1f) + 1) / 32) << 10) |
0x8000;
else
nblocks = ((((epcp->out_maxsize - 1) | 1) + 1) / 2) << 10;
dp = USB_GET_DESCRIPTOR(ep);
dp->TXCOUNT0 = 0;
dp->RXCOUNT0 = nblocks;
dp->TXADDR0 = usb_pm_alloc(usbp, epcp->in_maxsize);
dp->RXADDR0 = usb_pm_alloc(usbp, epcp->out_maxsize);
}
/**
* @brief Enables an endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*
* @notapi
*/
void usb_lld_init_endpoint(USBDriver *usbp, usbep_t ep) {
uint16_t epr;
stm32_usb_descriptor_t *dp;
const USBEndpointConfig *epcp = usbp->epc[ep];
/* Setting the endpoint type. Note that isochronous endpoints cannot be
bidirectional because it uses double buffering and both transmit and
receive descriptor fields are used for either direction.*/
switch (epcp->ep_mode & USB_EP_MODE_TYPE) {
case USB_EP_MODE_TYPE_ISOC:
#if STM32_USB_USE_ISOCHRONOUS
osalDbgAssert((epcp->in_state == NULL) || (epcp->out_state == NULL),
"isochronous EP cannot be IN and OUT");
epr = EPR_EP_TYPE_ISO;
break;
#else
osalDbgAssert(false, "isochronous support disabled");
#endif
/* Falls through.*/
case USB_EP_MODE_TYPE_BULK:
epr = EPR_EP_TYPE_BULK;
break;
case USB_EP_MODE_TYPE_INTR:
epr = EPR_EP_TYPE_INTERRUPT;
break;
default:
epr = EPR_EP_TYPE_CONTROL;
}
dp = USB_GET_DESCRIPTOR(ep);
/* IN endpoint handling.*/
if (epcp->in_state != NULL) {
dp->TXCOUNT0 = 0;
dp->TXADDR0 = usb_pm_alloc(usbp, epcp->in_maxsize);
#if STM32_USB_USE_ISOCHRONOUS
if (epr == EPR_EP_TYPE_ISO) {
epr |= EPR_STAT_TX_VALID;
dp->TXCOUNT1 = dp->TXCOUNT0;
dp->TXADDR1 = dp->TXADDR0; /* Both buffers overlapped.*/
}
else {
epr |= EPR_STAT_TX_NAK;
}
#else
epr |= EPR_STAT_TX_NAK;
#endif
}
/* OUT endpoint handling.*/
if (epcp->out_state != NULL) {
uint16_t nblocks;
/* Endpoint size and address initialization.*/
if (epcp->out_maxsize > 62)
nblocks = (((((epcp->out_maxsize - 1) | 0x1f) + 1) / 32) << 10) |
0x8000;
else
nblocks = ((((epcp->out_maxsize - 1) | 1) + 1) / 2) << 10;
dp->RXCOUNT0 = nblocks;
dp->RXADDR0 = usb_pm_alloc(usbp, epcp->out_maxsize);
#if STM32_USB_USE_ISOCHRONOUS
if (epr == EPR_EP_TYPE_ISO) {
epr |= EPR_STAT_RX_VALID;
dp->RXCOUNT1 = dp->RXCOUNT0;
dp->RXADDR1 = dp->RXADDR0; /* Both buffers overlapped.*/
}
else {
epr |= EPR_STAT_RX_NAK;
}
#else
epr |= EPR_STAT_RX_NAK;
#endif
}
/* EPxR register setup.*/
EPR_SET(ep, epr | ep);
EPR_TOGGLE(ep, epr);
}
/**
* @brief Enables an endpoint.
*
* @param[in] usbp pointer to the @p USBDriver object
* @param[in] ep endpoint number
*
* @notapi
*/
void usb_lld_init_endpoint(USBDriver *usbp, usbep_t ep) {
uint16_t nblocks, epr;
stm32_usb_descriptor_t *dp;
const USBEndpointConfig *epcp = usbp->epc[ep];
/* Setting the endpoint type. Note that isochronous endpoints cannot be
bidirectional because it uses double buffering and both transmit and
receive descriptor fields are used for either direction.*/
switch (epcp->ep_mode & USB_EP_MODE_TYPE) {
case USB_EP_MODE_TYPE_ISOC:
osalDbgAssert((epcp->in_cb == NULL) || (epcp->out_cb == NULL),
"isochronous EP cannot be IN and OUT");
epr = EPR_EP_TYPE_ISO;
break;
case USB_EP_MODE_TYPE_BULK:
epr = EPR_EP_TYPE_BULK;
break;
case USB_EP_MODE_TYPE_INTR:
epr = EPR_EP_TYPE_INTERRUPT;
break;
default:
epr = EPR_EP_TYPE_CONTROL;
}
/* Endpoint size and address initialization.*/
if (epcp->out_maxsize > 62)
nblocks = (((((epcp->out_maxsize - 1) | 0x1f) + 1) / 32) << 10) |
0x8000;
else
nblocks = ((((epcp->out_maxsize - 1) | 1) + 1) / 2) << 10;
dp = USB_GET_DESCRIPTOR(ep);
dp->TXCOUNT0 = 0;
dp->RXCOUNT0 = nblocks;
dp->TXADDR0 = usb_pm_alloc(usbp, epcp->in_maxsize);
dp->RXADDR0 = usb_pm_alloc(usbp, epcp->out_maxsize);
/* Initial status for isochronous enpoints is valid because disabled and
valid are the only legal values. Also since double buffering is used
we need to initialize both count/address sets depending on the direction,
but since we are not taking advantage of the double buffering, we set both
addresses to point to the same PMA.*/
if ((epcp->ep_mode & USB_EP_MODE_TYPE) == USB_EP_MODE_TYPE_ISOC) {
if (epcp->in_cb != NULL) {
epr |= EPR_STAT_TX_VALID;
dp->TXCOUNT1 = dp->TXCOUNT0;
dp->TXADDR1 = dp->TXADDR0; /* Both buffers overlapped.*/
}
if (epcp->out_cb != NULL) {
epr |= EPR_STAT_RX_VALID;
dp->RXCOUNT1 = dp->RXCOUNT0;
dp->RXADDR1 = dp->RXADDR0; /* Both buffers overlapped.*/
}
}
else {
/* Initial status for other endpoint types is NAK.*/
if (epcp->in_cb != NULL)
epr |= EPR_STAT_TX_NAK;
if (epcp->out_cb != NULL)
epr |= EPR_STAT_RX_NAK;
}
/* EPxR register setup.*/
EPR_SET(ep, epr | ep);
EPR_TOGGLE(ep, epr);
}
