+static bool rx_done;
+static size_t rx_size;
+static uint8_t rx_buffer[_MIN(CONFIG_USB_RXBUFSIZE, USB_RX_MAX_SIZE)]
+ __attribute__ ((__aligned__(4)));
+
+static void usb_endpointRead_complete(int ep)
+{
+ if (UNLIKELY(ep >= ENP_MAX_NUMB))
+ {
+ ASSERT(0);
+ return;
+ }
+ ASSERT(!(ep & 0x01));
+
+ rx_done = true;
+ rx_size = ep_cnfg[ep].size;
+}
+
+ssize_t usb_endpointRead(int ep, void *buffer, ssize_t size)
+{
+ int ep_num = usb_ep_logical_to_hw(ep);
+ ssize_t max_size = sizeof(rx_buffer);
+
+ /* Non-blocking read for EP0 */
+ if (ep_num == CTRL_ENP_OUT)
+ {
+ size = usb_size(size, usb_le16_to_cpu(setup_packet.wLength));
+ if (UNLIKELY(size > max_size))
+ {
+ LOG_ERR("%s: rx_buffer exceeded, try to enlarge CONFIG_USB_RXBUFSIZE\n",
+ __func__);
+ ASSERT(0);
+ return -USB_BUF_OVERFLOW;
+ }
+ if (!size)
+ usb_status_handler(ep_num);
+ else
+ {
+ __usb_ep_read(ep_num, rx_buffer, size,
+ usb_status_handler);
+ memcpy(buffer, rx_buffer, size);
+ }
+ return size;
+ }
+ if (UNLIKELY(!size))
+ return 0;
+ size = MIN(size, max_size);
+ rx_done = false;
+ rx_size = 0;
+
+ /* Blocking read */
+ __usb_ep_read(ep_num, rx_buffer, size, usb_endpointRead_complete);
+ while (!rx_done)
+ cpu_relax();
+ memcpy(buffer, rx_buffer, rx_size);
+
+ return rx_size;
+}
+
+static bool tx_done;
+static size_t tx_size;
+static uint8_t tx_buffer[_MIN(CONFIG_USB_TXBUFSIZE, USB_TX_MAX_SIZE)]
+ __attribute__ ((__aligned__(4)));
+
+static void usb_endpointWrite_complete(int ep)
+{
+ if (UNLIKELY(ep >= ENP_MAX_NUMB))
+ {
+ ASSERT(0);
+ return;
+ }
+ ASSERT(ep & 0x01);
+
+ tx_done = true;
+ tx_size = ep_cnfg[ep].size;
+}
+
+ssize_t usb_endpointWrite(int ep, const void *buffer, ssize_t size)
+{
+ int ep_num = usb_ep_logical_to_hw(ep);
+ ssize_t max_size = sizeof(tx_buffer);
+
+ /* Non-blocking write for EP0 */
+ if (ep_num == CTRL_ENP_IN)
+ {
+ size = usb_size(size, usb_le16_to_cpu(setup_packet.wLength));
+ if (UNLIKELY(size > max_size))
+ {
+ LOG_ERR("%s: tx_buffer exceeded, try to enlarge CONFIG_USB_TXBUFSIZE\n",
+ __func__);
+ ASSERT(0);
+ return -USB_BUF_OVERFLOW;
+ }
+ if (!size)
+ usb_status_handler(ep_num);
+ else
+ {
+ memcpy(tx_buffer, buffer, size);
+ __usb_ep_write(ep_num, tx_buffer, size,
+ usb_status_handler);
+ }
+ return size;
+ }
+ if (UNLIKELY(!size))
+ return 0;
+ size = MIN(size, max_size);
+ tx_done = false;
+ tx_size = 0;
+
+ /* Blocking write */
+ memcpy(tx_buffer, buffer, size);
+ __usb_ep_write(ep_num, tx_buffer, size, usb_endpointWrite_complete);
+ while (!tx_done)
+ cpu_relax();
+
+ return tx_size;
+}
+