To enable checkpoint before the USB stack is ready, the driver uses a polling mode with a small framebuffer reserved in SRAM. Once the USB subsystem initializes, it switches to interrupt-driven mode.
Cause: Power delivery negotiation failure or corrupt driver cache.
Solution:
Traditional console ports (RJ45 serial or DB9) are being phased out in favor of USB-C due to its reversibility, higher bandwidth, and support for multiple protocols. In security appliances (e.g., firewalls from Check Point Software) and custom embedded systems, a checkpoint console is a dedicated interface used to pause system execution, dump state, or enter recovery mode before booting the main OS.
Key Requirements:
The console driver must not interfere with PD negotiation. It uses only the USB 2.0 data lines (D+/D-) and avoids requesting power roles. In practice, the driver registers as a sink-only device.
Cause: Baud rate mismatch or line noise. checkpoint usb-c console driver
Solution: