update ath5k_beacon_update_timers() for better beacon timer calculation in a
variety of situations. most important is the possibility to call it with the
timestamp of a received beacon, when we detected that a HW merge has happened
and we need to reconfigure the beacon timers based on that.

we call this from the mac80211 callback reset_tsf now instead of beacon_update,
and there will be more use of it in the next patch.

drivers/net/wireless/ath5k/base.c:      Changes-licensed-under: 3-Clause-BSD
Signed-off-by: NBruno Randolf <bruno@thinktube.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

the beacon interval is passed by mac80211 in TU already, so we can directly use
it without conversion. also update the comments about TU (1 TU is defined by
802.11 as 1024usec).

drivers/net/wireless/ath5k/ath5k.h:     Changes-licensed-under: ISC
drivers/net/wireless/ath5k/base.c:      Changes-licensed-under: 3-Clause-BSD
drivers/net/wireless/ath5k/base.h:      Changes-licensed-under: 3-Clause-BSD
Signed-off-by: NBruno Randolf <bruno@thinktube.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Otherwise it may be impossible to connected to an open network after a
resume.

This is a modified version of an original patch by
Alex Eskin <alexeskin@yahoo.com>:

	https://bugzilla.redhat.com/show_bug.cgi?id=425950#c8Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

...instead of using AR5K_KEYCACHE_SIZE, which would seem to be a
typo/thinko...
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch gets rid of the if_id stuff where possible in favour of
a new per-virtual-interface structure "struct ieee80211_vif". This
structure is located at the end of the per-interface structure and
contains a variable length driver-use data area.

This has two advantages:
 * removes the need to look up interfaces by if_id, this is better
   for working with network namespaces and performance
 * allows drivers to store and retrieve per-interface data without
   having to allocate own lists/hash tables
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

add ath5k wireless driver

Portions of this driver are covered by one or both of the ISC and
3-clause BSD licenses.  Specific license information is cited at the top
of each file.

Acked-by and Signed-off-by information is collected from individual
patches as collected in the wireless-2.6 tree prior to upstream
submission.
Acked-by: NMatthew W. S. Bell  <mentor@madwifi.org>
Acked-by: NMichael Taylor <mike.taylor@apprion.com>
Acked-by: NPavel Roskin <proski@gnu.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NBradley M. Kuhn <bkuhn@softwarefreedom.org>
Signed-off-by: NBruno Randolf <bruno@thinktube.com>
Signed-off-by: NDave Young <hidave.darkstar@gmail.com>
Signed-off-by: NFrancesco Gringoli <francesco.gringoli@ing.unibs.it>
Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NKaren Sandler <karen@softwarefreedom.org>
Signed-off-by: NKrzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: NLuis R. Rodriguez <mcgrof@gmail.com>
Signed-off-by: NMatt Norwood <norwood@softwarefreedom.org>
Signed-off-by: NNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: NRichard Fontana <fontana@softwarefreedom.org>
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NUlrich Meis <meis@nets.rwth-aachen.de>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>