iflash2_mtd(4)
NAME
iflash2+_mtd - memory technology driver for Intel Series
2+ flash
SYNOPSIS
insmod iflash2+_mtd.o [pc_debug=n] [mem_speed=n] [word_width=n] [vpp_timeout_period=n] [vpp_settle=n] [erase_timeout=n] [erase_limit=n] [retry_limit=n] [max_tries=n] [mem_speed=n] [word_width=n] [do_sleep=n]
DESCRIPTION
Iflash2+_mtd is a memory technology driver for Intel
Series 2+ flash devices. Memory technology drivers are
used by Card Services to provide device-independent access
for memory cards through bulk memory services.
In addition to backwards compatibility with Series 2 flash
devices, Series 2+ devices provide fast page-mode trans
fers, which allow sequential flash writes to proceed in
the background without active monitoring. While faster
than Series 2 cards in actual write speeds, this means
that Series 2+ cards also do not tie up the host processor
while writes are in progress. By default, the driver
sleeps while waiting for writes to complete. For even
faster write throughput, at the expense of higher CPU uti
lization, the driver can optionally poll for write comple
tion. The do_sleep parameter determines which mode is
used.
PARAMETERS
- pc_debug=n
- Selects the PCMCIA debugging level. This parameter
is only available if the module is compiled with
debugging enabled. A non-zero value enables debug
ging. - mem_speed=n
- Sets the access speed of shared memory windows, in
nanoseconds. The default is 0 (i.e., no extra wait
states). Values of up to 1000 are legal. - word_width=n
- A flag indicating if memory windows should be con
figured for 8-bit (if 0) or 16-bit (if 1) trans
fers. The default is 1 (16-bit). - vpp_timeout_period=n
- In milliseconds, this specifies the maximum idle
period after a write operation before programming
power will be switched off. The default is 1000
ms. - vpp_settle=n
- In milliseconds, this gives a delay between when
programming power is switched on, and when the
device is assumed to be powered up and ready to
receive erase or write commands. The default is
100 ms. - write_timeout=n
- In milliseconds, specifies the maximum elapsed time
for a page write (256 words) before it times out.
The default is 100 ms. - erase_timeout=n
- In milliseconds, specifies the poll interval for
monitoring the status of a bulk erase operation.
The default is 100 ms. - erase_limit=n
- In milliseconds, specifies the maximum elapsed time
before an erase operation is assumed to have
failed. The default is 10000 ms. - retry_limit=n
- The maximum number of retries for a write opera
tion. The default is 8. - max_tries=n
- The maximum number of status register polls before
various commands are assumed to have timed out.
The default is 4096. - do_sleep=n
- A flag indicating if the driver should sleep or
busy loop while waiting for write completion. The
default is 1 (true).
AUTHOR
David Hinds - dahinds@users.sourceforge.net