USB to PCIe Reverse Engineering

Introduction

There are several chips on the market that support translating USB to NVMe/PCIe:

• ASMedia
  • ASM2362: USB 3.x Gen 2×1 to PCIe 3.x ×2
  • ASM2364: USB 3.x Gen 2×2 to PCIe 3.x ×4
  • ASM2464PD: USB4 Gen 3×2 / Thunderbolt 3 to PCIe 4.x ×4
  • ASM2464PDX: USB4 Gen 3×2 / Thunderbolt 3 to PCIe 4.x ×4 + integrated PCIe switch with up to four downstream ports (one ×4 port, two ×2 ports, four ×1 ports, or one ×2 port + two ×1 ports)
• JMicron
  • JMS581: USB 3.x Gen 2×1 to PCIe 3.x ×2 (NVMe) / SATA 3 / SD Express
  • JMS583: USB 3.x Gen 2×1 to PCIe 3.x ×2 (NVMe)
  • JMS586A: USB 3.x Gen 2×2 to PCIe 3.x ×2 (NVMe) + PCIe 3.x ×2 (AHCI)
  • JMS586U: USB 3.x Gen 2×2 to PCIe 3.x ×2 (NVMe) + PCIe 3.x ×2 (NVMe/AHCI)
• Realtek
  • RTL9210B-CG: USB 3.x Gen 2×1 to PCIe 3.x ×2 / SATA 3
  • RTL9211DS-CG: USB 3.x Gen 2×1 to PCIe 3.x ×2 / SD Express

This project will focus on the ASMedia controllers, for now.

Sub-projects

• ASM2x6x
• RTL921x

License

Except where otherwise stated:

• All software in this repository (e.g., tools for unpacking and generating firmware, etc.) is made available under the GNU General Public License, version 3 or later.
• All copyrightable content that is not software (e.g., reverse engineering notes, this README file, etc.) is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.