wifi: ath9k: eeprom: fix sparse endian warnings

Sparse warns:

drivers/net/wireless/ath/ath9k/eeprom_9287.c:82:9: warning: cast to restricted __le16
drivers/net/wireless/ath/ath9k/eeprom_9287.c:82:9: warning: cast from restricted __le32
drivers/net/wireless/ath/ath9k/eeprom_9287.c:83:9: warning: cast to restricted __le16
drivers/net/wireless/ath/ath9k/eeprom_9287.c:83:9: warning: cast from restricted __le32
drivers/net/wireless/ath/ath9k/eeprom_def.c:138:9: warning: cast to restricted __le16
drivers/net/wireless/ath/ath9k/eeprom_def.c:138:9: warning: cast from restricted __le32
drivers/net/wireless/ath/ath9k/eeprom_def.c:139:9: warning: cast to restricted __le16
drivers/net/wireless/ath/ath9k/eeprom_def.c:139:9: warning: cast from restricted __le32
drivers/net/wireless/ath/ath9k/eeprom_def.c:140:9: warning: cast to restricted __le16
drivers/net/wireless/ath/ath9k/eeprom_def.c:140:9: warning: cast from restricted __le32
drivers/net/wireless/ath/ath9k/eeprom_4k.c:79:9: warning: cast to restricted __le16
drivers/net/wireless/ath/ath9k/eeprom_4k.c:79:9: warning: cast from restricted __le32

antCtrlChain is an array of __le32 so le32_to_cpu() needs to be used.

Compile tested only.

Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://msgid.link/20240320170656.3534265-4-kvalo@kernel.org

ath9k: Differentiate between max combined and per chain power

The ath9k driver uses as maximum allowed txpower the constant
MAX_RATE_POWER. It is used to set a maximum txpower limit for the PHY
(which is combined txpower) and also the maximum txpower for per chain
rates. Its value 63 is derived from the maximum number the registers can
store for the per chain txpower.

The max txpower a user can set because of this is 31 dBm (floor(63 / 2)).
This also means that a device with multiple tx chains is even limited
further:

* 1 chain: 31 dBm per chain
* 2 chains: 28 dBm per chain
* 3 chains: 26 dBm per chain

This combined txpower limit of 31 dBm becomes even more problematic when
some extra antenna gain is set in the EEPROM. A high power device is then
no longer able to reach its potential limits.

Instead the code dealing with the combined txpower must use a higher limit
than 63 and only the code dealing with the per chain txpower have to use
the limit of 63. Since the antenna gain can be quite large and 8 bit
variables are often used in ath9k for txpower, a large, divisible by two
number like 254 is a good choice for this new limit.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath9k: move RELAY and DEBUG_FS to ATH9K[_HTC]_DEBUGFS

Currently, the common ath9k_common module needs to have a
dependency on RELAY and DEBUG_FS in order to built. This
is usually not a problem. But for RAM and FLASH starved
AR71XX devices, every little bit counts.

This patch adds a new symbol CONFIG_ATH9K_COMMON_DEBUG
which makes it possible to drop the RELAY and DEBUG_FS
dependency there and move it to ATH_(HTC)_DEBUGFS.

Note: The shared FFT/spectral code (which is the only user
of the relayfs in ath9k*) needs DEBUG_FS to export the relayfs
interface to dump the data to userspace. So it makes no sense
to have the functions compiled in, if DEBUG_FS is not there.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: define all EEPROM fields in Little Endian format

The ar9300_eeprom logic is already using only 8-bit (endian neutral),
__le16 and __le32 fields to state explicitly how the values should be
interpreted.
All other EEPROM implementations (4k, 9287 and def) were using u16 and
u32 fields with additional logic to swap the values (read from the
original EEPROM) so they match the current CPUs endianness.

The EEPROM format defaults to "all values are Little Endian", indicated
by the absence of the AR5416_EEPMISC_BIG_ENDIAN in the u8 EEPMISC
register. If we detect that the EEPROM indicates Big Endian mode
(AR5416_EEPMISC_BIG_ENDIAN is set in the EEPMISC register) then we'll
swap the values to convert them into Little Endian. This is done by
activating the EEPMISC based logic in ath9k_hw_nvram_swap_data even if
AH_NO_EEP_SWAP is set (this makes ath9k behave like the FreeBSD driver,
which also does not have a flag to enable swapping based on the
AR5416_EEPMISC_BIG_ENDIAN bit). Before this logic was only used to
enable swapping when "current CPU endianness != EEPROM endianness".

After changing all relevant fields to __le16 and __le32 sparse was used
to check that all code which reads any of these fields uses
le{16,32}_to_cpu.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: consistently use get_eeprom_rev(ah)

The AR5416_VER_MASK macro does the same as get_eeprom_rev, except that
one has to know the actual EEPROM type (and providing a reference to
that in a variable named "eep"). Additionally the eeprom_*.c
implementations used the same shifting logic multiple times to get the
eeprom revision which was also unnecessary duplication of
get_eeprom_rev.

Also use the AR5416_EEP_VER_MINOR_MASK macro where needed and introduce
a similar macro (AR5416_EEP_VER_MAJOR_MASK) for the major version.
Finally drop AR9287_EEP_VER_MINOR_MASK since it simply duplicates the
already defined AR5416_EEP_VER_MINOR_MASK.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: replace eeprom_param EEP_MINOR_REV with get_eeprom_rev

get_eeprom(ah, EEP_MINOR_REV) and get_eeprom_rev(ah) are both doing the
same thing: returning the EEPROM revision (12 lowest bits). Make the
code consistent by using get_eeprom_rev(ah) everywhere.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: Add an eeprom_ops callback for retrieving the eepmisc value

This allows deciding if we have to swap the EEPROM data (so it matches
the system's native endianness) even if no byte-swapping (swab16, based on
the first two bytes in the EEPROM) is needed.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: Add a #define for the EEPROM "eepmisc" endianness bit

This replaces a magic number with a named #define. Additionally it
removes two "eeprom format" specific #defines for the "big endianness"
bit which are the same on all eeprom formats.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: Simplify and fix eeprom endianness swapping

The three eeprom implementations had quite some duplicate code when it
came to endianness swapping.
Additionally there was a bug in eeprom_4k and eeprom_9287 which
prevented the endianness swapping from working correctly, because the
swapping code was guarded within an "if (!ath9k_hw_use_flash(ah))". In
eeprom_def this check did not exist, so it seems that eeprom_def was the
only implementation where endianness swapping worked.

This patch takes the duplicate code and moves it from eeprom_* to
eeprom.c. The new code is derived from eeprom_def, while taking into
account the specifics from the other implementations.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath9k: use REG_RMW and rmw buffer in ath9k_hw_4k_set_board_values

replace REG_WRITE to REG_RMW and place every thing in one
RMW buffer.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath9k: use REG_RMW and rmw buffer in ath9k_hw_4k_set_gain

it is possible to reduce time needed for this function
by rplacing REG_WRITE with REG_RMW (plus dummy 0) and putt all commands
in same buffer.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath9k: ath9k_hw_4k_set_board_values: use rmw buffer

it will reduce exution time from 14ms to 2ms on ar9271

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath9k: ath9k_hw_4k_set_board_values: use rmw buffer

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath9k: ath9k_hw_set_4k_power_cal_tabl: use rmw buffer

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath9k: add power per-rate tables for AR9002 chips

Add TX power per-rate tables for MIMO/legacy modes for AR9002 based chips
in order to cap the maximum TX power value per-rate in the TX descriptor path.
Add TX power adjustments for HT40 mode, open loop CCK rates and eeprom power
bias for AR9280 and later chips

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath9k_hw: simplify spur channel handling

Remove ah->config.spurmode and ah->config.spurchans, always use EEPROM
data.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: replace snprintf() with scnprintf()

Whenever the return value of snprintf() is used to calculate
remaining buffer-space, we wanted to use sncprintf() instead.

Indentation is adapted where possible. Some lines exceed the
line width limit, either they did it already before, or
since they can not be broken reasonably well.

Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Fix diversity combining for AR9285

When antenna diversity combining is enabled in the EEPROM,
the initial values for the MAIN/ALT config have to be
programmed correctly. This patch adds it for AR9285.

Since the diversity combining macros are common to all chip
families, remove the redundant AR9285 macros and move the
definitions to phy.h.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: use 'struct ath_hw *' as the first argument for 'ath9k_hw_nvram_read'

The 'ath9k_hw_nvram_read' function takes a
'struct ath_common *' as its first argument.
Almost each of its caller has a 'struct ath_hw *'
parameter in their argument list, and that is
dereferenced in order to get the 'struct ath_common'
pointer.

Change the first argument of 'ath9k_hw_nvram_read'
to be a 'struct ath_hw *', and remove the dereference
calls from the callers.

Also change the type of the first argument of the
ar9300_eeprom_read_{byte,word} functions.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: move duplicated debug message to 'ath9k_hw_nvram_read'

The fill_eeprom functions are printing the same
debug message in case the 'ath9k_hw_nvram_read'
function fails. Remove the duplicated code from
fill_eeprom functions and add the ath_dbg call
directly into 'ath9k_hw_nvram_read'.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

wireless: Remove casts to same type

Adding casts of objects to the same type is unnecessary
and confusing for a human reader.

For example, this cast:

int y;
int *p = (int *)&y;

I used the coccinelle script below to find and remove these
unnecessary casts. I manually removed the conversions this
script produces of casts with __force, __iomem and __user.

@@
type T;
T *p;
@@

- (T *)p
+ p

Neatened the mwifiex_deauthenticate_infra function which
was doing odd things with array pointers and not using
is_zero_ether_addr.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ath9k: Fix modal EEPROM dump

we provide excess buffer size for 'simple_read_from_buffer'
for modal EEPROM dump. This results in trailing NULL bytes
at the end of EEPROM dump, fix this.

Cc: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Reported-by: Holger Schurig <holgerschurig@googlemail.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Tested-by: Holger Schurig <holgerschurig@gogglemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath: Convert ath_dbg(bar, ATH_DBG_<FOO>, to ath_dbg(bar, FOO

Add ATH_DBG_ to macros to shorten the uses and
reduce the line count.

Coalesce ath_dbg formats.
Add missing spaces to coalesced formats.
Add missing newline terminations to ath_dbg formats.
Align ath_dbg arguments where appropriate.
Standardize ath_dbg formats without periods.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: Fix minimum CTL power for each runtime mode

The conformance test limits (CTL) for each regulatory domains
(FCC/ETSI/MKK) are programmed for each runtime modes (11B,11G,
HT20 and HT40) in EEPROM. The lowest ctledge power value of a
particular running mode should not be used while computing
ctledge power for a different running mode.(i.e 11G's min ctledge
power should not be used while computing ctledge power for HT20).

Currently, the code does not handle this properly which would
result in incorrect txpowers in certain cases. So reset the
twiceMaxEdgePower to the default while computing min ctlegepower
for every mode.

Cc: David Quan <dquan@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: remove EEP_REG_1

It was previously used for current_rd_ext

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: clean up tx power handling

The code for handling various restrictions concerning regulatory limits,
antenna gain, etc. is very convoluted and duplicated across various
EEPROM parsing implementations, making it hard to review.

This patch partially cleans up the mess by unifying regulatory limit
handling in one function and simplifying handling of antenna gain.
It also removes unused transmit power scaling arrays from the EEPROM code,
which belonged to an unimplemented API that isn't supposed to be in
the driver anyway.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: remove dead code in the eeprom ops

The eeprom .set_addac function is only necessary for AR9160, remove it
from eeprom_4k.c and remove the dummy function from eeprom_9287.c

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: clean up hardware revision checks

- AR_SREV_5416_20_OR_LATER is always true, remove it
- AR_SREV_9280_20_OR_LATER is always true within eeprom_4k.c and eeprom_9287.c
- (AR_SREV_9271 || AR_SREV_9285) is always true in eeprom_4k.c

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: remove eeprom txgain override for minor version < 19

ath9k_hw_4k_get_eeprom() overrides the eeprom value for txgain if the
minor version is not 19 or above with a value of 0.
ar9002_hw_init_mode_gain_regs() relies on this information to
determine whether this is a high power wifi card or not. The override
caused the driver to always use the 'normal' power tables even for
high power devices if their minor version was not high enough. Thus
leading to reduced power output.

This isn't needed for the AR9285; the check originated with the
AR9280 setup code which requires the EEPROM version check.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Adrian Chadd <adrian@freebsd.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: Add dump_eeprom support for eeprom_4k

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: fix calculated runtime tx power limit

Use the previously calculated maximum of all rates instead of just the one
from the lowest rate of the selected PHY mode.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: remove the tx power index offset

It is always 0

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: use get_unaligned_{b16, le16, le32} where possible

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Drag the driver to the year 2011

The Times They Are a-Changin'.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: Fix instable target power control b/w CCK/OFDM

The problem is that when the attenuation is increased,
the rate will start to drop from MCS7 -> MCS6, and finally
will see MCS1 -> CCK_11Mbps. When the rate is changed b/w
CCK and OFDM, it will use register desired_scale to calculate
how much tx gain need to change.

The output power with the same tx gain for CCK and OFDM modulated
signals are different. This difference is constant for AR9280
but not AR9285/AR9271. It has different PA architecture
a constant. So it should be calibrated against this PA
characteristic.

The driver has to read the calibrated values from EEPROM and set
the tx power registers accordingly.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: Offload USB eeprom reading to target

For USB devices, reading the EEPROM data can be offloaded
to the target. Use multiple register reads to take advantage
of this feature to reduce initialization time.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: remove antenna configuration eeprom ops and variables

AR9280 based hardware with 3 antennas and slow antenna diversity has
not been seen in the wild and ath9k does not support that form of
antenna diversity, so remove the EEPROM ops for it.
These EEPROM ops are currently only used for setting the
AR_PHY_SWITCH_COM register, which is being done in the EEPROM specific
file already.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: merge ath9k_hw_get_gain_boundaries_pdadcs between eeprom_def.c and eeprom_4k.c

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: clean up duplicate and unnused eeprom related defines

AR*_MAX_RATE_POWER => MAX_RATE_POWER
AR*_EEPROM_MODAL_SPURS => AR_EEPROM_MODAL_SPURS
AR*_OPFLAGS_* => AR5416_OPFLAGS_*
...

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath: Convert ath_print to ath_dbg

Remove ath/debug.h and the includes of these files.
Coalesce long formats.
Correct a few misspellings and missing "\n"s from these logging messages.
Remove unnecessary trailing space before a newline.
Remove ARRAY_SIZE casts, use printf type %zu

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath: Convert ath_print(.., ATH_DBG_FATAL to ath_err

So these errors are always emitted at KERN_ERR level.
Remove ARRAY_SIZE casts, use printf type %zu

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Use static const

Using static const generally increases object text and decreases data size.
It also generally decreases overall object size.

text data bss dec hex filename
11161 56 2136 13353 3429 drivers/net/wireless/ath/ath9k/ar9003_paprd.o.new
11167 56 2136 13359 342f drivers/net/wireless/ath/ath9k/ar9003_paprd.o.old
15428 56 3056 18540 486c drivers/net/wireless/ath/ath9k/eeprom_4k.o.old
15451 56 3056 18563 4883 drivers/net/wireless/ath/ath9k/eeprom_4k.o.new
14087 56 2560 16703 413f drivers/net/wireless/ath/ath9k/eeprom_9287.o.old
14036 56 2560 16652 410c drivers/net/wireless/ath/ath9k/eeprom_9287.o.new
10041 56 2384 12481 30c1 drivers/net/wireless/ath/ath9k/ani.o.new
10088 56 2384 12528 30f0 drivers/net/wireless/ath/ath9k/ani.o.old
9316 1580 2304 13200 3390 drivers/net/wireless/ath/ath9k/htc_drv_init.o.new
9316 1580 2304 13200 3390 drivers/net/wireless/ath/ath9k/htc_drv_init.o.old
16483 56 3432 19971 4e03 drivers/net/wireless/ath/ath9k/ar9003_phy.o.new
16517 56 3432 20005 4e25 drivers/net/wireless/ath/ath9k/ar9003_phy.o.old
18221 104 2960 21285 5325 drivers/net/wireless/ath/ath9k/rc.o.old
18203 104 2960 21267 5313 drivers/net/wireless/ath/ath9k/rc.o.new
19985 56 4288 24329 5f09 drivers/net/wireless/ath/ath9k/eeprom_def.o.new
20040 56 4288 24384 5f40 drivers/net/wireless/ath/ath9k/eeprom_def.o.old
23997 56 4984 29037 716d drivers/net/wireless/ath/ath9k/ar5008_phy.o.old
23846 56 4984 28886 70d6 drivers/net/wireless/ath/ath9k/ar5008_phy.o.new
24285 56 3184 27525 6b85 drivers/net/wireless/ath/ath9k/ar9003_eeprom.o.old
24101 56 3184 27341 6acd drivers/net/wireless/ath/ath9k/ar9003_eeprom.o.new
6834 56 1032 7922 1ef2 drivers/net/wireless/ath/ath9k/ar9002_phy.o.old
6780 56 1032 7868 1ebc drivers/net/wireless/ath/ath9k/ar9002_phy.o.new
36211 64 8624 44899 af63 drivers/net/wireless/ath/ath9k/hw.o.new
36401 64 8624 45089 b021 drivers/net/wireless/ath/ath9k/hw.o.old
9281 56 1496 10833 2a51 drivers/net/wireless/ath/ath9k/ar9003_calib.o.old
9150 56 1496 10702 29ce drivers/net/wireless/ath/ath9k/ar9003_calib.o.new

Use ARRAY_SIZE instead of a magic number.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: extend ath9k_hw_set_txpowerlimit to test channel txpower

ath9k_hw_set_txpowerlimit gets an extra boolean parameter that - if set -
causes the rate txpower table and the regulatory limit to be calculated
and stored, without changing hardware registers.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: clean up register write buffering

Throughout the code, DISABLE_REGWRITE_BUFFER is always called right after
REGWRITE_BUFFER_FLUSH. Since that's unlikely to change any time soon, that
makes keeping those ops separate rather pointless, as it only increases
code size and line number counts.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: get correct tx gain type in ath9k_hw_4k_get_eeprom

The base_eep_header_4k structure contains information that the
device supports high power tx gain table or not. However the
ath9k_hw_4k_get_eeprom function does not return that value when
it is called with EEP_TXGAIN_TYPE. This leads to that the tx gain
initialization will use the init values from the original tx gain
table even if the device inidicates that the high power table
should be used.

Changes-licensed-under: ISC
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Shu Hwa Shen <shensh@zcomm.com.cn>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: simplify revision checks for AR9285

Since AR9285 v1.0 and v1.1 were never sold (and the initvals removed),
its revision checks can be simplified similar to AR9280

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: simplify revision checks for AR9280

Since AR9280 v1.0 was never sold (and the initvals removed), v1.0 specific
revision checks can be removed and the 'v2.0 or later' check can be
simplified to a check for AR9280 or later.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: remove warning in ath9k_hw_def_get_num_ant_config

This patch fixes following warning

drivers/net/wireless/ath/ath9k/eeprom_def.c: In function 'ath9k_hw_def_get_num_ant_config'
drivers/net/wireless/ath/ath9k/eeprom_def.c:1425:47: warning: comparison
between 'enum ath9k_hal_freq_band' and 'enum ieee80211_band'

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: Add capability flag for Antenna diversity and combining feature

This is enabled only for ar9285.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: remove unneeded calculation of minimal calibration power

Remove tMinCalPower from ath9k_hw_set_def_power_cal_table(), as it's
never used. Remove corresponding arguments of the functions calculating
that value.

Original patch by Prarit Bhargava <prarit@redhat.com>

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: fix antenna diversity on AR9285

On AR9285, the antenna switch configuration register uses more than just
16 bits. Because of an arbitrary mask applied to the EEPROM value that
stores this configuration, diversity was broken in some cases, leading
to a significant degradation in signal strength.
Fix this by changing the callback to return a 32 bit value and remove
the arbitrary mask.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath: Fix uninitialized variable warnings

Fixes 'make -j24 CONFIG_DEBUG_SECTION_MISMATCH=y' warning:

drivers/net/wireless/ath/ath9k/eeprom_4k.c: In function ‘ath9k_hw_get_4k_gain_boundaries_pdadcs.clone.1’:
drivers/net/wireless/ath/ath9k/eeprom_4k.c:311: error: ‘minPwrT4’ may be used uninitialized in this function
drivers/net/wireless/ath/ath9k/eeprom_9287.c: In function ‘ath9k_hw_get_AR9287_gain_boundaries_pdadcs’:
drivers/net/wireless/ath/ath9k/eeprom_9287.c:302: error: ‘minPwrT4’ may be used uninitialized in this function
drivers/net/wireless/ath/ath9k/eeprom_def.c: In function ‘ath9k_hw_get_def_gain_boundaries_pdadcs.clone.0’:
drivers/net/wireless/ath/ath9k/eeprom_def.c:679: error: ‘minPwrT4’ may be used uninitialized in this function

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: Use buffered register writes

This patch adds macros at certain places
which could be optimized for multiple register writes.

The performance of ath9k_htc improves considerably,
especially reducing the latency involved in a scan run.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: restore mac address reading logic

Once upon a time the AR_EEPROM_MAC macro was added to let us
add a random attribute to the three 4-bytes of MAC addresses
entries we read from the EEPROM. This was good while a random
high-enough value was used which did not conflict with any
of the already existing enum eeprom_param values. With AR9003
support the enums overlap and it means we either increment
the random offset or just restore the reading logic to match
what the HAL has. I choose to do the later to synchronize
the logic on both code bases.

This should fix reading the MAC address from the EEPROM
on AR9003 hardware.

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

ath9k_hw: Move some RF ops to the private callbacks

The PHY split is easier done in a few steps. First move
the RF ops to the private ops and rename them accordingly.
We split PHY stuff up first for the AR5008 and AR9002
families. There are some callbacks that AR9002 share
with the AR5008 familiy so we set those first, if AR9002
has some different callbacks it will override them upon
hardware init.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

wireless/ath: remove trailing space in messages

Signed-off-by: Frans Pop <elendil@planet.nl>
Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k_hw: modify the rf control register for ar9271 revision 1.0

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

ath9k: Fix bugs in handling TX power

* Get power table offset from the EEPROM instead of using
a hardcoded value of -5 if the EEPROM rev is >= 21.
* Add support in the 4k eeprom code for tx power offset
in case we have a 4k AR9280 implementation.
* Fix tx power accuracy at high powers.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

atheros: move bus ops to ath_common

This is the last part to make ath9k hw code core driver agnostic.
I believe ath9k_htc can now use use the hw code unmodified.

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

ath9k: clarify what hw code is and remove ath9k.h from a few files

hw code will be shared between ath9k and ath9k_htc.
Just a few more files are left to clean up, mark them as well.

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

atheros: add common debug printing

ath9k uses this for now, ath9k_htc is expected to re-use this
as well. We lave ath5k as is, but it certainly can also be
converted later.

The ath9k module parameter and debugfs entry is kept.

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

ath9k: use ath_hw for DPRINTF() and debug init/exit

DPRINTF() is used in hw specific related code, as such
ensure we don't rely on the private driver core ath_softc
struct when calling it. Drivers can then implement their
own DPRINTF() as they see fit.

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

ath: move regulatory info into shared common structure

This moves the shared regulatory structure into the
common structure. We will use this ongoing for common
data.

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

ath9k: Remove local chainmask variable

The chainmask can be obtained directly from ath_hw.
Also, use a helper macro for comparing CTLs - this improves readability.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Cleanup TX power calculation for 4K chips

Write CCK power-per-rate array always and report
correct TX power to regulatory.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Clean antenna configuration for 4K EEPROM chips

This patch revamps the antenna configuration mechanism
for 4K chips.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Cleanup ath9k_hw_4k_set_gain() interface

regChainOffset is always zero, remove it.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

ath9k: Split eeprom.c into manageable pieces

Add eeprom_def.c, eeprom_4k.c and eeprom_9287.c
This improves maintainability.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>