trasz 1c791e0200 Make sdhci(4) work after suspend/resume for chipsets that require
the frequency quirk. This makes it work on eg ThinkPad T420.

Without it, after resume one can see this:

mmc0: ACMD42 failed, RESULT: 4
mmcsd0: Error indicated: 1 Timeout
mmcsd0: Error indicated: 2 Bad CRC
mmcsd0: Error indicated: 2 Bad CRC
mmcsd0: Error indicated: 2 Bad CRC
mmcsd0: Error indicated: 2 Bad CRC
sdhci_pci0-slot0: Got data interrupt 0x00200000, but there is no active command.
sdhci_pci0-slot0: ============== REGISTER DUMP ==============
sdhci_pci0-slot0: Sys addr: 0x06317200 | Version: 0x00000502
sdhci_pci0-slot0: Blk size: 0x00000200 | Blk cnt: 0x00000010
sdhci_pci0-slot0: Argument: 0x00000200 | Trn mode: 0x00000037
sdhci_pci0-slot0: Present: 0x01ff0000 | Host ctl: 0x00000007
sdhci_pci0-slot0: Power: 0x0000000f | Blk gap: 0x00000000
sdhci_pci0-slot0: Wake-up: 0x00000000 | Clock: 0x00000007
sdhci_pci0-slot0: Timeout: 0x0000000d | Int stat: 0x00000000
sdhci_pci0-slot0: Int enab: 0x01ff00fb | Sig enab: 0x01ff00fb
sdhci_pci0-slot0: AC12 err: 0x00000000 | Slot int: 0x00000000
sdhci_pci0-slot0: Caps: 0x21e8c8b2 | Max curr: 0x00000040
sdhci_pci0-slot0: ===========================================
sdhci_pci0-slot0: Got data interrupt 0x00200000, but there is no active command.
sdhci_pci0-slot0: ============== REGISTER DUMP ==============
sdhci_pci0-slot0: Sys addr: 0x06317200 | Version: 0x00000502
sdhci_pci0-slot0: Blk size: 0x00000200 | Blk cnt: 0x00000001
sdhci_pci0-slot0: Argument: 0x00000040 | Trn mode: 0x00000013
sdhci_pci0-slot0: Present: 0x01ff0000 | Host ctl: 0x00000007
sdhci_pci0-slot0: Power: 0x0000000f | Blk gap: 0x00000000
sdhci_pci0-slot0: Wake-up: 0x00000000 | Clock: 0x00000007
sdhci_pci0-slot0: Timeout: 0x0000000d | Int stat: 0x00000000
autofs_flush: /net flushed
sdhci_pci0-slot0: Int enab: 0x01ff00fb | Sig enab: 0x01ff00fb
autofs_flush: /media flushed
sdhci_pci0-slot0: AC12 err: 0x00000000 | Slot int: 0x00000000
sdhci_pci0-slot0: Caps: 0x21e8c8b2 | Max curr: 0x00000040
sdhci_pci0-slot0: ===========================================

Afterwards all operations on /dev/mmcsd0 fail with EIO.

Reviewed by:	jhb@
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D6265
2016-05-11 07:50:35 +00:00
2016-05-03 18:50:10 +00:00
2015-04-20 20:33:22 +00:00
2015-12-31 11:21:45 +00:00
2016-03-14 16:27:43 +00:00
2016-05-03 18:00:27 +00:00
2016-05-03 18:00:27 +00:00

This is the top level of the FreeBSD source directory.  This file
was last revised on:
$FreeBSD$

For copyright information, please see the file COPYRIGHT in this
directory (additional copyright information also exists for some
sources in this tree - please see the specific source directories for
more information).

The Makefile in this directory supports a number of targets for
building components (or all) of the FreeBSD source tree.  See build(7)
and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
for more information, including setting make(1) variables.

The `buildkernel` and `installkernel` targets build and install
the kernel and the modules (see below).  Please see the top of
the Makefile in this directory for more information on the
standard build targets and compile-time flags.

Building a kernel is a somewhat more involved process.  See build(7), config(8),
and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
for more information.

Note: If you want to build and install the kernel with the
`buildkernel` and `installkernel` targets, you might need to build
world before.  More information is available in the handbook.

The kernel configuration files reside in the sys/<arch>/conf
sub-directory.  GENERIC is the default configuration used in release builds.
NOTES contains entries and documentation for all possible
devices, not just those commonly used.


Source Roadmap:
---------------

bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

games		Amusements.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

sys		Kernel sources.

tests		Regression tests which can be run by Kyua.  See tests/README
		for additional information.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.


For information on synchronizing your source tree with one or more of
the FreeBSD Project's development branches, please see:

  http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html
Description
freebsd kernel with SKQ
Readme 2 GiB
Languages
C 63.3%
C++ 23.3%
Roff 5.1%
Shell 2.9%
Makefile 1.5%
Other 3.4%