CFI(4)

NAME
cfi, cfid - driver for Common Flash Interface (CFI) NOR flash

SYNOPSIS
device cfi
device cfid
options CFI_SUPPORT_STRATAFLASH
options CFI_ARMEDANDDANGEROUS

In /boot/device.hints:
hint.cfi.0.at="nexus0"
hint.cfi.0.maddr=0x74000000
hint.cfi.0.msize=0x4000000

In DTS file:
flash@74000000 {
  compatible = "cfi-flash";
  reg = <0x74000000 0x4000000>;
};

DESCRIPTION
The cfi device driver provides a management interface to NOR flash devices supporting the Common Flash Interface (CFI) specification. Its companion device cfid provides a geom(4) disk interface to the device.

Special support for features of the Intel StrataFlash line are available with the CFI_SUPPORT_STRATAFLASH kernel option. Additional support for write-once bits to switch part of Intel StrataFlash devices to read-only can be enabled by the CFI_ARMEDANDDANGEROUS kernel option.

SEE ALSO
led(4)

HISTORY
The cfi device driver first appeared in FreeBSD 8.0.

AUTHORS
The cfi driver was written by Juniper Networks with StrataFlash support by Sam Leffler. This manual page was written by SRI International and the University of Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) (“CTSRD”), as part of the DARPA CRASH research programme.