Reply to post: And now causing amusement on the Linux Kernel Mailing List

And now causing amusement on the Linux Kernel Mailing List

http://thread.gmane.org/gmane.linux.usb.general/116767

From: Russ Dill

This patch provides the FTDI genuine product verification steps

as contained within the new 2.12.00 official release. It ensures

that counterfeiters don't exploit engineering investment made

by FTDI. Counterfeit ICs are destroying innovation in the

industry.

+ /* Attempt to set Vendor ID to 0 */

+ eeprom_data[1] = 0;

+

+ /* Calculate new checksum to avoid bricking devices */

+ checksum = ftdi_checksum(eeprom_data, eeprom_size);

+

+ /* Verify EEPROM programming behavior/nonbehavior */

+ write_eeprom(port, 1, 0);

+ write_eeprom(port, eeprom_size - 1, checksum);