dwc2/host: HFIR: Fix timing off-by-one

2025-04-11 12:15:56 +02:00
parent 865e3488f9
commit 72357cdb20
1 changed files with 2 additions and 2 deletions
--- a/src/portable/synopsys/dwc2/hcd_dwc2.c
+++ b/src/portable/synopsys/dwc2/hcd_dwc2.c
@@ -1242,9 +1242,9 @@ static void port0_enable(dwc2_regs_t* dwc2, tusb_speed_t speed) {

  uint32_t hfir = dwc2->hfir & ~HFIR_FRIVL_Msk;
  if (speed == TUSB_SPEED_HIGH) {
-    hfir |= 125*phy_clock;
+    hfir |= 125*phy_clock - 1; // The "- 1" is the correct value. The Synopsys databook was corrected in 3.30a
  } else {
-    hfir |= 1000*phy_clock;
+    hfir |= 1000*phy_clock - 1;
  }

  dwc2->hfir = hfir;