ATA secure commands for SSD drives

In the following FAQ

http://www.dell.com/support/article/il/en/ildhs1/SLN156240/en?c=il&s=dhs&cs=ildhs1&l=en#Unique-Hyphenated-Issue-Here-14 Hard Drive - Dell Solid State Drive (SSD) FAQ

The following question and answer is given:

14. What is TRIM/UNMAP and do Dell enterprise SSD drives support it?

Certain Operating Systems support the TRIM function, which translates deleted files to the associated LBA (logical block address) on the storage device (SSD). For SATA, the command is also called TRIM, for SAS, the command is called UNMAP. The TRIM/UNMAP command notifies the drive it no longer needs data in certain LBAs (Logical Block Address) which then free up a number of NAND pages.

The TRIM/UNMAP command needs to be supported by the OS, the drive, and the controller in order to work. The TRIM/UNMAP command could result in higher SSD performance from both the reduced data needed to be rewritten during garbage collection and the higher free space resulting on the drive. Current shipping Dell enterprise drives have high enough performance and endurance so they do not yet support these commands even if the OS supports them. These features are being investigated for subsequent Dell SSD offerings.

We have a number of DELL Latitude Rugged Extreme (7404) laptops and need to be able to reset the disks (Liteon LCS-512l9s SSD drives) for security and use trim. Does anyone know how can we do this please?

Thanks for your help.