Commit Graph

6 Commits

Author SHA1 Message Date
jchandra
4cab4cc0c4 CFI fixes for big endian archs.
The flash commands and responses are little-endian and have to be
byte swapped on big-endian systems.  However the raw read of data
need not be swapped.

Make the cfi_read and cfi_write do the swapping, and provide a
cfi_read_raw which does not byte swap for reading data from
flash.
2012-03-27 15:13:12 +00:00
attilio
fc7af0ba5b Merge r221614,221696,221737,221840 from largeSMP project branch:
Rewrite atomic operations for powerpc in order to achieve the following:
- Produce a type-clean implementation (in terms of functions arguments
  and returned values) for the primitives.
- Fix errors with _long() atomics where they ended up with the wrong
  arguments to be accepted.
- Follow the sys/type.h specifics that define the numbered types starting
  from standard C types.
- Let _ptr() version to not auto-magically cast arguments, but leave
  the burden on callers, as _ptr() atomic is intended to be used
  relatively rarely.

Fix cfi in order to support the latest point.

In collabouration with:	bde
Tested by:		andreast, nwhitehorn, jceel
MFC after:		2 weeks
2011-05-22 20:55:54 +00:00
sam
010280a0bc Add cfid, a disk interface to CFI flash devices; this enables construction
of flash-based filesystems.

Note this is not interlocked against the raw CFI device.
2009-03-09 23:16:02 +00:00
sam
a7490070eb Add support for frobbing Intel StrataFlash Protection Registers:
o add CFI_SUPPORT_STRATAFLASH compile option to enable support
o add new ioctls to get/set the factory and user/oem segments of the PR
  and to get/set Protection Lock Register that fuses the user segment
o add #defines for bits in the status register
o update cfi_wait_ready to take an offset so it can be used to wait for
  PR write completion and replace constants w/ symbolic names

Note: writing the user segment isn't correct; committing now to get review.

Sponsored by:	Carlson Wireless
Reviewed by:	imp, Chris Anderson
2009-02-05 18:12:07 +00:00
sam
1e53abb0ad reorg ioctl code to simplify adding new requests 2009-02-03 19:07:41 +00:00
marcel
b53efb78fa Add a driver for flash memory that implements to the Common Flash
Memory Interface (CFI). The flash memory can be read and written
to through /dev/cfi# and an ioctl() exists so processes can read
the query information.
The driver supports the AMD and Intel command set, though only
the AMD command has been tested.

Obtained from:	Juniper Networks, Inc.
2008-10-25 06:18:12 +00:00