add >64 byte packet support for ep3

hathach · Dec 14, 2023 · 8f50811 · 8f50811
1 parent c25c755
commit 8f50811
Showing 1 changed file with 14 additions and 1 deletion.
diff --git a/src/portable/wch/dcd_ch32_usbfs.c b/src/portable/wch/dcd_ch32_usbfs.c
@@ -28,6 +28,12 @@ static struct {
     bool isochronous[EP_MAX];
     struct usb_xfer xfer[EP_MAX][2];
     TU_ATTR_ALIGNED(4) uint8_t buffer[EP_MAX][2][64];
+    TU_ATTR_ALIGNED(4) struct {
+        // OUT transfers >64 bytes will overwrite queued IN data!
+        uint8_t out[64];
+        uint8_t in[1023];
+        uint8_t pad;
+    } ep3_buffer;
 } data;
 
 /* private helpers */
@@ -38,6 +44,8 @@ static void update_in(uint8_t rhport, uint8_t ep, bool force) {
             size_t len = TU_MIN(xfer->max_size, xfer->len);
             if (ep == 0) {
                 memcpy(data.buffer[ep][TUSB_DIR_OUT], xfer->buffer, len); // ep0 uses same chunk
+            } else if (ep == 3) {
+                memcpy(data.ep3_buffer.in, xfer->buffer, len);
             } else {
                 memcpy(data.buffer[ep][TUSB_DIR_IN], xfer->buffer, len);
             }
@@ -67,7 +75,11 @@ static void update_out(uint8_t rhport, uint8_t ep, size_t rx_len) {
     struct usb_xfer *xfer = &data.xfer[ep][TUSB_DIR_OUT];
     if (xfer->valid) {
         size_t len = TU_MIN(xfer->max_size, TU_MIN(xfer->len, rx_len));
-        memcpy(xfer->buffer, data.buffer[ep][TUSB_DIR_OUT], len);
+        if (ep == 3) {
+            memcpy(xfer->buffer, data.ep3_buffer.out, len);
+        } else {
+            memcpy(xfer->buffer, data.buffer[ep][TUSB_DIR_OUT], len);
+        }
         xfer->buffer += len;
         xfer->len -= len;
         xfer->processed_len += len;
@@ -111,6 +123,7 @@ void dcd_init(uint8_t rhport) {
         EP_TX_CTRL(ep) = USBFS_EP_T_AUTO_TOG | USBFS_EP_T_RES_NAK;
         EP_RX_CTRL(ep) = USBFS_EP_R_AUTO_TOG | USBFS_EP_R_RES_NAK;
     }
+    EP_DMA(3) = (uint32_t) &data.ep3_buffer.out[0];
 
     dcd_connect(rhport);
 }