Add what this repo is for, and initial driver information.

README.md

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+Hardware Datasheets
+===================
+
+This repo is to collect references to datasheets and standards.  It
+will also include if documentation is available for NDA and hopefully
+how to obtain said documentation.
+
+Feel free to submit updates to the repo!
+
+Please make sure that the [Internet Archive](https://web.archive.org) has
+saved copies of all the links in this repository.  I hope to have a script
+in the future that will scrape the links and use their API to ensure copies
+are saved.  I highly recommend their FireFox plugin that makes saving pages
+quick and easy.

USB.md

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+USB
+===
+
+The USB standard is available from [USB-IF](https://usb.org/).
+
+* [USB 2.0 Specification](https://usb.org/document-library/usb-20-specification) [direct link](https://www.usb.org/sites/default/files/usb_20_20190524.zip)
+* [USB 3.2 Specification](https://usb.org/document-library/usb-32-specification-released-september-22-2017-and-ecns) [direct link](https://www.usb.org/sites/default/files/usb_32_20200716_0.zip)
+* [USB 4 Specification](https://usb.org/document-library/usb4tm-specification) [direct link](https://usb.org/sites/default/files/USB4%20Specification_5.zip)
+
+Manufacturers
+-------------
+
+### Realtek
+
+* RTL8152/8153 - There is no programmings documentation available.  There are some datasheets that are labeled confidential, but they do not contain enough information to program the devices.