2013-04-03 22:37:40 +00:00
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/*-
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2017-11-27 14:52:40 +00:00
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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2013-04-03 22:37:40 +00:00
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* Copyright (c) 2012 SRI International
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* Copyright (c) 2009 Roelof Jonkman, Carlson Wireless Inc.
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* Copyright (c) 2009 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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MFP4 217312, 222008, 222052, 222053, 222673, 231484, 231491, 231565, 570643
Rework the timeout code to use actual time rather than a DELAY() loop and
to use both typical and maximum to allow logging of timeout failures.
Also correct the erase timeout, it is specified in milliseconds not
microseconds like the other timeouts. Do not invoke DELAY() between
status queries as this adds significant latency which in turn reduced
write performance substantially.
Sanity check timeout values from the hardware.
Implement support for buffered writes (only enabled on Intel/Sharp parts
for now). This yields an order of magnitude speedup on the 64MB Intel
StrataFlash parts we use.
When making a copy of the block to modify, also keep a clean copy around
until we are ready to commit the block and use it to avoid unnecessary
erases. In the non-buffer write case, also use it to avoid
unnecessary writes when the block has not been erased. This yields a
significant speedup when doing things like zeroing a block.
Sponsored by: DARPA, AFRL
Reviewed by: imp (previous version)
2013-09-04 17:19:21 +00:00
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* Portions of this software were developed by SRI International and the
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* University of Cambridge Computer Laboratory under DARPA/AFRL contract
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* (FA8750-10-C-0237) ("CTSRD"), as part of the DARPA CRASH research
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* programme.
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*
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2013-04-03 22:37:40 +00:00
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <machine/bus.h>
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#include <dev/cfi/cfi_var.h>
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static int
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cfi_nexus_probe(device_t dev)
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{
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2013-10-22 14:10:00 +00:00
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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cfi_nexus_attach(device_t dev)
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{
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int error;
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error = cfi_probe(dev);
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if (error != 0)
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return (error);
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2013-04-03 22:37:40 +00:00
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2013-10-22 14:10:00 +00:00
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return cfi_attach(dev);
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2013-04-03 22:37:40 +00:00
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}
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static device_method_t cfi_nexus_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, cfi_nexus_probe),
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2013-10-22 14:10:00 +00:00
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DEVMETHOD(device_attach, cfi_nexus_attach),
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2013-04-03 22:37:40 +00:00
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DEVMETHOD(device_detach, cfi_detach),
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{0, 0}
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};
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static driver_t cfi_nexus_driver = {
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cfi_driver_name,
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cfi_nexus_methods,
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sizeof(struct cfi_softc),
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};
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DRIVER_MODULE(cfi, nexus, cfi_nexus_driver, cfi_devclass, 0, 0);
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