usb: designware: support max packet size override

commit 8873cbb57e0c7759bad6b03eb83f94f1961dfefa
Author: mojyack <[email protected]>
Date:   Sat Jan 3 18:05:22 2026 +0900

    usb: designware: support max packet size override
    
    Change-Id: I75d3aca1599ce064c604c96f2b5ed4c041f975b8

diff --git a/firmware/drivers/usb-designware.c b/firmware/drivers/usb-designware.c
index 61fa4acc70..9968778dde 100644
--- a/firmware/drivers/usb-designware.c
+++ b/firmware/drivers/usb-designware.c
@@ -1589,8 +1589,6 @@ void usb_drv_ep_reset_alloc_ctx(struct usb_drv_ep_alloc_ctx* ctx)
 
 bool usb_drv_ep_allocate(struct usb_drv_ep_alloc_ctx* ctx, int ep, int type, int max_packet_size)
 {
-    (void)max_packet_size; /* FIXME: support max packet size override */
-
     const uint8_t epnum = EP_NUM(ep);
     const uint8_t epdir = EP_DIR(ep);
 
@@ -1629,12 +1627,12 @@ bool usb_drv_ep_allocate(struct usb_drv_ep_alloc_ctx* ctx, int ep, int type, int
 
 ok:
     ctx->type[epnum][epdir] = type;
+    ctx->max_packet_size[epnum][epdir] = max_packet_size;
     return true;
 }
 
 void usb_drv_ep_init(const struct usb_drv_ep_alloc_ctx* ctx, int ep)
 {
-    /* FIXME: support max packet size override */
     const int epnum = EP_NUM(ep);
     const int epdir_ = EP_DIR(ep);
     const int type = ctx->type[epnum][epdir_];
@@ -1642,18 +1640,21 @@ void usb_drv_ep_init(const struct usb_drv_ep_alloc_ctx* ctx, int ep)
     enum usb_dw_epdir epdir = (epdir_ == DIR_IN) ? USB_DW_EPDIR_IN : USB_DW_EPDIR_OUT;
     struct usb_dw_ep* dw_ep = usb_dw_get_ep(EP_NUM(ep), epdir);
 
-    int maxpktsize;
-    if(type == EPTYP_ISOCHRONOUS)
+    int mps = ctx->max_packet_size[epnum][epdir_];
+    if(mps == -1)
     {
-        maxpktsize = 1023;
-    }
-    else
-    {
-        maxpktsize = usb_drv_port_speed() ? 512 : 64;
+        if(type == EPTYP_ISOCHRONOUS)
+        {
+            mps = 1023;
+        }
+        else
+        {
+            mps = usb_drv_port_speed() ? 512 : 64;
+        }
     }
 
     usb_dw_target_disable_irq();
-    usb_dw_configure_ep(ctx, epnum, epdir, type, maxpktsize);
+    usb_dw_configure_ep(ctx, epnum, epdir, type, mps);
     usb_dw_target_enable_irq();
 
     dw_ep->active = true;
diff --git a/firmware/export/usb-designware.h b/firmware/export/usb-designware.h
index e5e4b6073d..993ebcfbc1 100644
--- a/firmware/export/usb-designware.h
+++ b/firmware/export/usb-designware.h
@@ -294,6 +294,8 @@ extern void usb_dw_target_clear_irq(void);
 struct usb_drv_ep_alloc_ctx_dw
 {
     int8_t type[USB_NUM_ENDPOINTS][2];
+    int max_packet_size[USB_NUM_ENDPOINTS][2];
+
     uint16_t txfifo_usage;
     uint8_t assigned_txfifos[USB_NUM_ENDPOINTS];
 };
-- 
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