Take txq lock in debug file and fix reporting of used buffers.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Descriptors are currently logged with ATH5K_DEBUG_RESET,
which isn't really apt, and also means we can't see just
the descriptor setup or just the resets.  Add a new
debug level just for that.
Acked-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

snprintf() returns the number of characters that would have been written
(not counting the NUL character).  So we can't use it as the limiter to
simple_read_from_buffer() without capping it first at sizeof(buf).
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

We currently trigger a reset via a tasklet when certain error
conditions are detected so that the card will (eventually)
restart.  Unfortunately this makes locking complicated since
reset can also be called in process context (e.g. for channel
change).  Currently nothing protects against concurrent resets,
which can be the source of corruption bugs.

Reset takes too long to spinlock the whole thing, so this
patch moves deferred resets into the mac80211 workqueue to
enable use of sc->lock mutex.
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Acked-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

ath5k_hw_rx_error was only used once, where we could easily just use
ath5k_hw_rx_status as well, so remove it.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Acked-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

In the debug ouptut rx_status_0 was printed twice instead of rx_status_1. Also
make the debug message more clear.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Acked-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Add a debug print for every case of reset.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Collect all pieces concering the antenna switch table into one function.
Previously it was split up between ath5k_hw_reset() and
ath5k_hw_commit_eeprom_settings().

Also we need to set the antenna switch table when ath5k_hw_set_antenna_mode()
is called manually (by "iw phy0 antenna set", for example).

I'm not sure if we need to set the switchtable at the same place in
ath5k_hw_reset() as it was before - it is set later thru
ath5k_hw_set_antenna_mode() anyways - but i leave it there to avoid
problems(?).

Plus print switchtable registers in the debugfs file.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Now that we have ftrace, it is not needed any more.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Acked-by: NNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This is an Adaptive Noise Imunity (ANI) implementation for ath5k. I have looked
at both ath9k and HAL sources (they are nearly the same), and even though i
have implemented some things differently, the basic algorithm is practically
the same, for now. I hope that this can serve as a clean start to improve the
algorithm later.

This also adds a possibility to manually control ANI settings, right now only
thru a debugfs file:
  * set lowest sensitivity (=highest noise immunity):
	echo sens-low > /sys/kernel/debug/ath5k/phy0/ani
  * set highest sensitivity (=lowest noise immunity):
	echo sens-high > /sys/kernel/debug/ath5k/phy0/ani
  * automatically control immunity (default):
	echo ani-on > /sys/kernel/debug/ath5k/phy0/ani
  * to see the parameters in use and watch them change:
	cat /sys/kernel/debug/ath5k/phy0/ani

Manually setting sensitivity will turn the automatic control off. You can also
control each of the five immunity parameters (noise immunity, spur immunity,
firstep, ofdm weak signal detection, cck weak signal detection) manually thru
the debugfs file.

This is tested on AR5414 and nearly doubles the thruput in a noisy 2GHz band.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Update PHY error codes from the HAL, and keep them in statistics for debugging
via the 'frameerrors' file. This will also be used by ANI.
Signed-off-by: NBruno Randolf <br1@einfach.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

add a debugfs file to see different RX and TX errors as reported in our status
descriptors. this can help to diagnose driver problems.

statistics can be cleared by writing 'clear' into the frameerrors file.

example:

# cat /sys/kernel/debug/ath5k/phy0/frameerrors
RX
---------------------
CRC     27      (11%)
PHY     3       (1%)
FIFO    0       (0%)
decrypt 0       (0%)
MIC     0       (0%)
process 0       (0%)
jumbo   0       (0%)
[RX all 245]

TX
---------------------
retry   2       (9%)
FIFO    0       (0%)
filter  0       (0%)
[TX all 21]
Signed-off-by: NBruno Randolf <br1@einfach.org>
Acked-by: NNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

keep statistics about which antenna was used for TX and RX. this is used only
for debugging right now, but might have other applications later.

add a new file 'antenna' in debugfs (/sys/kernel/debug/ath5k/phy0/antenna) to show
antenna use statistics and antenna diversity related register values. it can
also be used to set the antenna mode until we have proper support for that in
iw:
  - echo diversity > antenna: use default antenna mode (RX and TX diversity)
  - echo fixed-a > antenna: use fixed antenna A for RX and TX
  - echo fixed-b > antenna: use fixed antenna B for RX and TX
  - echo clear > antenna: reset antenna statistics
Signed-off-by: NBruno Randolf <br1@einfach.org>
Acked-by: NNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Don't allow users to open debugfs files, because it can cause oopses.

When a user opens some file, driver unlinks it and frees the
corresponding structure, we will dereference freed memory.
Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Make some structures const to place them in .rodata, since we won't
change them.

Most important parts of objdump -h:
-  0 .text         00011170
+  0 .text         00011140
-  5 .rodata       0000828e
+  5 .rodata       0000895e
- 13 .data         00000560
+ 13 .data         00000110
- 14 .devinit.data 00000260
Signed-off-by: NJiri Slaby <jirislaby@gmail.com>
Acked-by: NNick Kossifidis <mickflemm@gmail.com>
Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
Cc: Bob Copeland <me@bobcopeland.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch enables low-level driver independent debugging of the TSF and remove the driver specific things of ath5k and ath9k from the debugfs.
Signed-off-by: NAlina Friedrichsen <x-alina@gmx.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch updates the ath5k specific entry in the debugfs to read and reset the TSF value, to allowing write it, too. This makes debugging the IBSS handling of wifi drivers _much_ easier.
Signed-off-by: NAlina Friedrichsen <x-alina@gmx.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NJan Engelhardt <jengelh@medozas.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

http://bugzilla.kernel.org/show_bug.cgi?id=12076

Remove any write access to groups and others, only keep write permission
to its owner, usually only root user.
Reported-by: NJérôme Poulin <jeromepoulin@gmail.com>
Signed-off-by: NCheng Renquan <crquan@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Change "mamagement" to "management"
Signed-off-by: NBob Copeland <me@bobcopeland.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

 * No code changes...

 * Split hw.c to multiple files for better maintenance and add some documentation on each file
   code is going to grow soon (eeprom.c for example is going to get much stuff currently developed
   on ath_info) so it's better this way.

 * Rename following functions to maintain naming scheme:

     ah_setup_xtx_desc -> ah_setup_mrr_tx_desc
     (Because xtx doesn't say much, it's actually
     a multi-rate-retry tx descriptor)

     ath5k_hw_put_tx/rx_buf - > ath5k_hw_set_tx/rxdp
     ath5k_hw_get_tx/rx_buf -> ath5k_hw_get_tx/rxdp
     (We don't put any "buf" we set descriptor pointers on hw)

     ath5k_hw_tx_start -> ath5k_hw_start_tx_dma
     ath5k_hw_start_rx -> ath5k_hw_start_rx_dma
     ath5k_hw_stop_pcu_recv -> ath5k_hw_stop_rx_pcu
     (It's easier this way to identify them, we also
     have ath5k_hw_start_rx_pcu which completes the
     set)

     ath5k_hw_set_intr -> ath5k_hw_set_imr
     (As in get_isr we set imr here, not "intr")

  * Move ath5k_hw_setup_rx_desc on ah->ah_setup_rx_desc so we can
    include support for different rx descriptors in the future

  * Further cleanups so that checkpatch doesn't complain
    (only some > 80 col warnings for eeprom.h and reg.h as usual
    due to comments)

  Tested on 5211 and 5213 cards and works ok.

Changes-licensed-under: ISC
Signed-off-by: NNick Kossifidis <mickflemm@gmail.com>
Acked-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

* Update list of registers
* Use updated register macros inside hw.c, initvals.c and debug.c

Changes-licensed-under: ISC
Signed-off-by: NNick Kossifidis <mickflemm@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath5k/debug.c: In function 'read_file_tsf': drivers/net/wireless/ath5k/debug.c:203: warning: format '%016llx'
expects type 'long long unsigned int', but argument 4 has type 'u64' drivers/net/wireless/ath5k/debug.c:203: warning: format '%016llx'
expects type 'long long unsigned int', but argument 4 has type 'u64' drivers/net/wireless/ath5k/debug.c: In function 'read_file_beacon':
drivers/net/wireless/ath5k/debug.c:274: warning: format '%016llx' expects type 'long long unsigned int', but argument 4 has type 'u64'
drivers/net/wireless/ath5k/debug.c:274: warning: format '%016llx' expects type 'long long unsigned int', but argument 4 has type 'u64'

drivers/net/wireless/iwlwifi/iwl-4965.c: In function 'iwl4965_tx_status_reply_compressed_ba':
drivers/net/wireless/iwlwifi/iwl-4965.c:3907: warning: format '%llx' expects type 'long long unsigned int', but argument 4 has type 'u64'
drivers/net/wireless/iwlwifi/iwl-4965.c: In function 'iwl4965_rx_reply_compressed_ba':
drivers/net/wireless/iwlwifi/iwl-4965.c:4039: warning: format '%llx' expects type 'long long unsigned int', but argument 6 has type '__le64'
drivers/net/wireless/iwlwifi/iwl-4965.c:4046: warning: format '%llx' expects type 'long long unsigned int', but argument 5 has type 'u64'
drivers/net/wireless/iwlwifi/iwl4965-base.c: In function 'iwl4965_tx_status_reply_tx':
drivers/net/wireless/iwlwifi/iwl4965-base.c:3661: warning: format '%llx' expects type 'long long unsigned int', but argument 6 has type 'u64'
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

move ath5k_tx_status and ath5k_rx_status structures out of the hardware
descriptor since they are not accessed by the hardware at all. they just
contain converted information from the hardware descriptor. since they are only
used in the rx and tx tasklets there is also no use to keep them for each
descriptor.

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

* make struct ath5k_desc clearer by directly including unions of structures,
  which correspond to the hardware descriptors of different HW versions (5210
  and 5212). before they were casted at onto ath5k_desc at different points
  (e.g.  ds_hw[2]).

* rename some structures and variable names to make their use clearer, e.g.
  struct ath5k_hw_4w_tx_desc to ath5k_hw_4w_tx_ctl.

* substitute "old" with "5210" and "new" with "5212" (eg. rename
  ath5k_hw_proc_new_rx_status() to ath5k_hw_proc_5212_rx_status()) because old
  and new are relative and we might have a newer structure at some point.

* unify structs ath5k_hw_old_rx_status and ath5k_hw_new_rx_status into one
  ath5k_hw_rx_status, because they only differ in the flags and masks.

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

This patch finishes the port and enables debug as an build option.
This was tested on:

Atheros AR5213A chip found (MAC: 0x59, PHY: 0x43)
RF5112A multiband radio found (0x36)

Note:

For 2 GHz band on the above card I noticed we get negative channel
numbers. Will look into this unless someone beats me to it.

Example out put when loading using:

sudo modprobe ath5k debug=0x00000400

 Band 2 GHz: channels 26, rates 12
  channels:
     1 2412 00c0 0000
     2 2417 00c0 0000
     3 2422 00c0 0000
     4 2427 00c0 0000
     5 2432 00c0 0000
     6 2437 00c0 0000
     7 2442 00c0 0000
     8 2447 00c0 0000
     9 2452 00c0 0000
    10 2457 00c0 0000
    11 2462 00c0 0000
    12 2467 00c0 0000
    13 2472 00c0 0000
    14 2484 00c0 0000
   -498 2512 00c0 0000
   -494 2532 00c0 0000
   -490 2552 00c0 0000
   -486 2572 00c0 0000
   -482 2592 00c0 0000
   -478 2612 00c0 0000
   -474 2632 00c0 0000
   -470 2652 00c0 0000
   -466 2672 00c0 0000
   -462 2692 00c0 0000
   -458 2712 00c0 0000
   -454 2732 00c0 0000
 Band 5 GHz: channels 194, rates 8
  channels:
    27 5135 0140 0000
    28 5140 0140 0000
[... etc ]
   219 6095 0140 0000
   220 6100 0140 0000
  rates:
     60 000b 0000 0000
     90 000f 0000 0000
    120 000a 0000 0000
    180 000e 0000 0000
    240 0009 0000 0000
    360 000d 0000 0000
    480 0008 0000 0000
    540 000c 0000 0000

Changes to base.c, base.h
Changes-licensed-under: 3-Clause-BSD

Changes to debug.c, debug.h
Changes-licensed-under: GPL
Signed-off-by: NLuis R. Rodriguez <mcgrof@winlab.rutgers.edu>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

* use only one debug level for beacon debugging: unify ATH5K_DEBUG_BEACON and
ATH5K_DEBUG_BEACON_PROC.

* remove debug level ATH5K_DEBUG_FATAL. doesn't make sense as a debug level -
if it's fatal it should be logged as an error.

* fancier printing of debug levels. cat /debugfs/ath5k/phy0/debug.

* allow debug levels to be changed by echoing their name into
/debugfs/ath5k/phy0/debug. this will toggle the state, when it was off it will
be turned on and vice versa.

* use copy_from_user() when reading from the debug files. use unsigned int for
better optimization. reduce buffer sizes on stack.

drivers/net/wireless/ath5k/base.c:      Changes-licensed-under: 3-Clause-BSD
drivers/net/wireless/ath5k/debug.c:     Changes-licensed-under: GPL
drivers/net/wireless/ath5k/debug.h:     Changes-licensed-under: GPL
Signed-off-by: NBruno Randolf <bruno@thinktube.com>
Acked-by: NLuis R. Rodriguez <mcgrof@winlab.rutgers.edu>
Acked-by: NJiri Slaby <jirislaby@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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>