diff options
| author | Tomas Rezucha <[email protected]> | 2025-08-28 15:35:55 +0200 |
|---|---|---|
| committer | Tomas Rezucha <[email protected]> | 2025-08-28 15:35:55 +0200 |
| commit | 38f41f5fa28943086cd36653e0914fd59cb7ed03 (patch) | |
| tree | f623729de28c6ade8fe4674a2eb25250b41e3b2d | |
| parent | edf188280a52d92fc167532ba9269a038d2fb8a7 (diff) | |
fix(dcd/dwc2): Fix reset procedure for versions >=4.20a
| -rw-r--r-- | src/portable/synopsys/dwc2/dwc2_common.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/portable/synopsys/dwc2/dwc2_common.c b/src/portable/synopsys/dwc2/dwc2_common.c index b001f343d..9b8333ad2 100644 --- a/src/portable/synopsys/dwc2/dwc2_common.c +++ b/src/portable/synopsys/dwc2/dwc2_common.c @@ -1,7 +1,7 @@ /* * The MIT License (MIT) * - * Copyright (c) 2024 Ha Thach (tinyusb.org) + * Copyright (c) 2024-2025 Ha Thach (tinyusb.org) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -45,11 +45,14 @@ // //-------------------------------------------------------------------- static void reset_core(dwc2_regs_t* dwc2) { + // load gsnpsid (it is not readable after reset is asserted) + uint32_t gsnpsid = dwc2->gsnpsid; + // reset core dwc2->grstctl |= GRSTCTL_CSRST; - if ((dwc2->gsnpsid & DWC2_CORE_REV_MASK) < (DWC2_CORE_REV_4_20a & DWC2_CORE_REV_MASK)) { - // prior v42.0 CSRST is self-clearing + if ((gsnpsid & DWC2_CORE_REV_MASK) < (DWC2_CORE_REV_4_20a & DWC2_CORE_REV_MASK)) { + // prior v4.20a CSRST is self-clearing while (dwc2->grstctl & GRSTCTL_CSRST) {} } else { // From v4.20a CSRST bit is write only, CSRT_DONE (w1c) is introduced for checking. |