This patch fixes two warnings below after unplugging ar9271 usb device:
	-one is a kernel warning[1]
	-another is a lockdep warning[2]

The root reason is that __skb_queue_purge can't be executed in hardirq
context, so the patch forks ath9k_skb_queue_purge(ath9k version of _skb_queue_purge),
which frees skb with dev_kfree_skb_any which can be run in hardirq
context safely, then prevent the lockdep warning and kernel warning after
unplugging ar9271 usb device.

[1] kernel warning
[  602.894005] ------------[ cut here ]------------
[  602.894005] WARNING: at net/core/skbuff.c:398 skb_release_head_state+0x71/0x87()
[  602.894005] Hardware name: 6475EK2
[  602.894005] Modules linked in: ath9k_htc ath9k ath9k_common ath9k_hw ath bridge stp llc sunrpc ipv6 cpufreq_ondemand acpi_cpufreq freq_table kvm_intel kvm arc4 ecb mac80211 snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep thinkpad_acpi snd_pcm snd_timer hwmon iTCO_wdt snd e1000e pcspkr i2c_i801 usbhid iTCO_vendor_support wmi cfg80211 yenta_socket rsrc_nonstatic pata_acpi snd_page_alloc soundcore uhci_hcd ohci_hcd ehci_hcd usbcore i915 drm_kms_helper drm i2c_algo_bit i2c_core video output [last unloaded: ath]
[  602.894005] Pid: 2506, comm: ping Tainted: G        W  2.6.34-rc3-wl #20
[  602.894005] Call Trace:
[  602.894005]  <IRQ>  [<ffffffff8104a41c>] warn_slowpath_common+0x7c/0x94
[  602.894005]  [<ffffffffa022f398>] ? __skb_queue_purge+0x43/0x4a [ath9k_htc]
[  602.894005]  [<ffffffff8104a448>] warn_slowpath_null+0x14/0x16
[  602.894005]  [<ffffffff813269c1>] skb_release_head_state+0x71/0x87
[  602.894005]  [<ffffffff8132829a>] __kfree_skb+0x16/0x81
[  602.894005]  [<ffffffff813283b2>] kfree_skb+0x7e/0x86
[  602.894005]  [<ffffffffa022f398>] __skb_queue_purge+0x43/0x4a [ath9k_htc]
[  602.894005]  [<ffffffffa022f560>] __hif_usb_tx+0x1c1/0x21b [ath9k_htc]
[  602.894005]  [<ffffffffa022f73c>] hif_usb_tx_cb+0x12f/0x154 [ath9k_htc]
[  602.894005]  [<ffffffffa00d2fbe>] usb_hcd_giveback_urb+0x91/0xc5 [usbcore]
[  602.894005]  [<ffffffffa00f6c34>] ehci_urb_done+0x7a/0x8b [ehci_hcd]
[  602.894005]  [<ffffffffa00f6f33>] qh_completions+0x2ee/0x376 [ehci_hcd]
[  602.894005]  [<ffffffffa00f8ba5>] ehci_work+0x95/0x76e [ehci_hcd]
[  602.894005]  [<ffffffffa00fa5ae>] ? ehci_irq+0x2f/0x1d4 [ehci_hcd]
[  602.894005]  [<ffffffffa00fa725>] ehci_irq+0x1a6/0x1d4 [ehci_hcd]
[  602.894005]  [<ffffffff810a6d18>] ? __rcu_process_callbacks+0x7a/0x2df
[  602.894005]  [<ffffffff810a47a4>] ? handle_fasteoi_irq+0x22/0xd2
[  602.894005]  [<ffffffffa00d268d>] usb_hcd_irq+0x4a/0xa7 [usbcore]
[  602.894005]  [<ffffffff810a2853>] handle_IRQ_event+0x77/0x14f
[  602.894005]  [<ffffffff813285ce>] ? skb_release_data+0xc9/0xce
[  602.894005]  [<ffffffff810a4814>] handle_fasteoi_irq+0x92/0xd2
[  602.894005]  [<ffffffff8100c4fb>] handle_irq+0x88/0x91
[  602.894005]  [<ffffffff8100baed>] do_IRQ+0x63/0xc9
[  602.894005]  [<ffffffff81354245>] ? ip_flush_pending_frames+0x4d/0x5c
[  602.894005]  [<ffffffff813ba993>] ret_from_intr+0x0/0x16
[  602.894005]  <EOI>  [<ffffffff811095fe>] ? __delete_object+0x5a/0xb1
[  602.894005]  [<ffffffff813ba5f5>] ? _raw_write_unlock_irqrestore+0x47/0x7e
[  602.894005]  [<ffffffff813ba5fa>] ? _raw_write_unlock_irqrestore+0x4c/0x7e
[  602.894005]  [<ffffffff811095fe>] __delete_object+0x5a/0xb1
[  602.894005]  [<ffffffff81109814>] delete_object_full+0x25/0x31
[  602.894005]  [<ffffffff813a60c0>] kmemleak_free+0x26/0x45
[  602.894005]  [<ffffffff810ff517>] kfree+0xaa/0x149
[  602.894005]  [<ffffffff81323fb7>] ? sock_def_write_space+0x84/0x89
[  602.894005]  [<ffffffff81354245>] ? ip_flush_pending_frames+0x4d/0x5c
[  602.894005]  [<ffffffff813285ce>] skb_release_data+0xc9/0xce
[  602.894005]  [<ffffffff813282a2>] __kfree_skb+0x1e/0x81
[  602.894005]  [<ffffffff813283b2>] kfree_skb+0x7e/0x86
[  602.894005]  [<ffffffff81354245>] ip_flush_pending_frames+0x4d/0x5c
[  602.894005]  [<ffffffff81370c1f>] raw_sendmsg+0x653/0x709
[  602.894005]  [<ffffffff81379e31>] inet_sendmsg+0x54/0x5d
[  602.894005]  [<ffffffff813207a2>] ? sock_recvmsg+0xc6/0xdf
[  602.894005]  [<ffffffff813208c1>] sock_sendmsg+0xc0/0xd9
[  602.894005]  [<ffffffff810e13b4>] ? might_fault+0x68/0xb8
[  602.894005]  [<ffffffff810e13fd>] ? might_fault+0xb1/0xb8
[  602.894005]  [<ffffffff8132a1c3>] ? copy_from_user+0x2f/0x31
[  602.894005]  [<ffffffff8132a5b3>] ? verify_iovec+0x54/0x91
[  602.894005]  [<ffffffff81320d41>] sys_sendmsg+0x1da/0x241
[  602.894005]  [<ffffffff8103d327>] ? finish_task_switch+0x0/0xc9
[  602.894005]  [<ffffffff8103d327>] ? finish_task_switch+0x0/0xc9
[  602.894005]  [<ffffffff8107642e>] ? trace_hardirqs_on_caller+0x16/0x150
[  602.894005]  [<ffffffff813ba27d>] ? _raw_spin_unlock_irq+0x56/0x63
[  602.894005]  [<ffffffff8103d3cb>] ? finish_task_switch+0xa4/0xc9
[  602.894005]  [<ffffffff8103d327>] ? finish_task_switch+0x0/0xc9
[  602.894005]  [<ffffffff810357fe>] ? need_resched+0x23/0x2d
[  602.894005]  [<ffffffff8107642e>] ? trace_hardirqs_on_caller+0x16/0x150
[  602.894005]  [<ffffffff813b9750>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[  602.894005]  [<ffffffff81009c02>] system_call_fastpath+0x16/0x1b
[  602.894005] ---[ end trace 91ba2d8dc7826839 ]---

[2] lockdep warning
[  169.363215] ======================================================
[  169.365390] [ INFO: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected ]
[  169.366334] 2.6.34-rc3-wl #20
[  169.366872] ------------------------------------------------------
[  169.366872] khubd/78 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
[  169.366872]  (clock-AF_INET){++.?..}, at: [<ffffffff81323f51>] sock_def_write_space+0x1e/0x89
[  169.366872]
[  169.366872] and this task is already holding:
[  169.366872]  (&(&hif_dev->tx.tx_lock)->rlock){-.-...}, at: [<ffffffffa03715b0>] hif_usb_stop+0x24/0x53 [ath9k_htc]
[  169.366872] which would create a new lock dependency:
[  169.366872]  (&(&hif_dev->tx.tx_lock)->rlock){-.-...} -> (clock-AF_INET){++.?..}
[  169.366872]
[  169.366872] but this new dependency connects a HARDIRQ-irq-safe lock:
[  169.366872]  (&(&hif_dev->tx.tx_lock)->rlock){-.-...}
[  169.366872] ... which became HARDIRQ-irq-safe at:
[  169.366872]   [<ffffffff810772d5>] __lock_acquire+0x2c6/0xd2b
[  169.366872]   [<ffffffff8107866d>] lock_acquire+0xec/0x119
[  169.366872]   [<ffffffff813b99bb>] _raw_spin_lock+0x40/0x73
[  169.366872]   [<ffffffffa037163d>] hif_usb_tx_cb+0x5e/0x154 [ath9k_htc]
[  169.366872]   [<ffffffffa00d2fbe>] usb_hcd_giveback_urb+0x91/0xc5 [usbcore]
[  169.366872]   [<ffffffffa00f6c34>] ehci_urb_done+0x7a/0x8b [ehci_hcd]
[  169.366872]   [<ffffffffa00f6f33>] qh_completions+0x2ee/0x376 [ehci_hcd]
[  169.366872]   [<ffffffffa00f8ba5>] ehci_work+0x95/0x76e [ehci_hcd]
[  169.366872]   [<ffffffffa00fa725>] ehci_irq+0x1a6/0x1d4 [ehci_hcd]
[  169.366872]   [<ffffffffa00d268d>] usb_hcd_irq+0x4a/0xa7 [usbcore]
[  169.366872]   [<ffffffff810a2853>] handle_IRQ_event+0x77/0x14f
[  169.366872]   [<ffffffff810a4814>] handle_fasteoi_irq+0x92/0xd2
[  169.366872]   [<ffffffff8100c4fb>] handle_irq+0x88/0x91
[  169.366872]   [<ffffffff8100baed>] do_IRQ+0x63/0xc9
[  169.366872]   [<ffffffff813ba993>] ret_from_intr+0x0/0x16
[  169.366872]   [<ffffffff8130f6ee>] cpuidle_idle_call+0xa7/0x115
[  169.366872]   [<ffffffff81008c4f>] cpu_idle+0x68/0xc4
[  169.366872]   [<ffffffff813a41e0>] rest_init+0x104/0x10b
[  169.366872]   [<ffffffff81899db3>] start_kernel+0x3f1/0x3fc
[  169.366872]   [<ffffffff818992c8>] x86_64_start_reservations+0xb3/0xb7
[  169.366872]   [<ffffffff818993c4>] x86_64_start_kernel+0xf8/0x107
[  169.366872]
[  169.366872] to a HARDIRQ-irq-unsafe lock:
[  169.366872]  (clock-AF_INET){++.?..}
[  169.366872] ... which became HARDIRQ-irq-unsafe at:
[  169.366872] ...  [<ffffffff81077349>] __lock_acquire+0x33a/0xd2b
[  169.366872]   [<ffffffff8107866d>] lock_acquire+0xec/0x119
[  169.366872]   [<ffffffff813b9d07>] _raw_write_lock_bh+0x45/0x7a
[  169.366872]   [<ffffffff8135cf14>] tcp_close+0x165/0x34d
[  169.366872]   [<ffffffff8137aced>] inet_release+0x55/0x5c
[  169.366872]   [<ffffffff81321350>] sock_release+0x1f/0x6e
[  169.366872]   [<ffffffff813213c6>] sock_close+0x27/0x2b
[  169.366872]   [<ffffffff8110dd45>] __fput+0x125/0x1ca
[  169.366872]   [<ffffffff8110de04>] fput+0x1a/0x1c
[  169.366872]   [<ffffffff8110adc9>] filp_close+0x68/0x72
[  169.366872]   [<ffffffff8110ae80>] sys_close+0xad/0xe7
[  169.366872]   [<ffffffff81009c02>] system_call_fastpath+0x16/0x1b

(Trimmed at the "other info that might help us debug this" line in
the interest of brevity... -- JWL)
Signed-off-by: NMing Lei <tom.leiming@gmail.com>
Acked-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

In ath9k-htc register out path, ath9k-htc will pass skb->data into
usb hcd and usb hcd will do dma mapping and unmapping to the buffer
pointed by skb->data, so we should pass a cache-line aligned address.

This patch replace __dev_alloc_skb with alloc_skb to make skb->data
pointed to a cacheline aligned address simply since ath9k-htc does not
skb_push on the skb and pass it to mac80211, also use kfree_skb to free
the skb allocated by alloc_skb(we can use kfree_skb safely in hardirq
context since skb->destructor is NULL always in the path).
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NMing Lei <tom.leiming@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

In ath9k-htc register in path, ath9k-htc will pass skb->data into
usb hcd and usb hcd will do dma mapping and unmapping to the buffer
pointed by skb->data, so we should pass a cache-line aligned address.

This patch replace __dev_alloc_skb with alloc_skb to make skb->data
pointed to a cacheline aligned address simply since ath9k-htc does not
skb_push on the skb and pass it to mac80211, also use kfree_skb to free
the skb allocated by alloc_skb(we can use kfree_skb safely in hardirq
context since skb->destructor is NULL always in the path).
Signed-off-by: NMing Lei <tom.leiming@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

In ath9k_hif_usb_alloc_rx_urbs, ath9k-htc will pass skb->data into
usb hcd and usb hcd will do dma mapping and unmapping to the buffer
pointed by skb->data, so we should pass a cache-line aligned address.

This patch replace __dev_alloc_skb with alloc_skb to make skb->data
pointed to a cacheline aligned address simply since ath9k-htc does not
skb_push on the skb and pass it to mac80211, also use kfree_skb to free
the skbs allocated by alloc_skb(we can use kfree_skb safely in hardirq
context since skb->destructor is NULL always in the path).
Signed-off-by: NMing Lei <tom.leiming@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Don't modify ah->iniModes, it's supposed to be constant.  Instead, apply
the fixup when the data is written to the registers.

Change ath9k_hw_init_eeprom_fix() to only determine whether the fixup is
needed.

This allows similteneous support for AR9220 cards that need AR_AN_TOP2
fixup (such as Ubiquiti SR71-12) and those that don't need it (D-Link
DWA-552 rev A2).
Signed-off-by: NPavel Roskin <proski@gnu.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Messages that are generated by the HTC layer
don't have any TX callback endpoints assigned to them.
Consequently, the allocated SKBs are never freed.

Fix this issue by handling this case in the HTC layer
itself.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

hif_usb_regout_cb() frees the given URB, which is
borked by design. Use an anchor to simplify URB
management.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The maximum number of packets in a single buffer in
stream mode is 10. The driver currently uses 8 - which
caused stack corruption, in the absence of any kind
of OOB checking.

Fixing this to the correct value of 10 fixes the module
unload issue.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Tested-by: NMing Lei <tom.leiming@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

RX URBs are automatically freed when the reference
count drops to zero - this currently doesn't happen when
usb_kill_anchored_urbs() is called during unload.

Fix this by dropping the reference count by one during
initial submission.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Use a spin lock to prevent concurrent access
to variables dealing with RX stream mode handling.
Currently, no protection is implemented - which
causes problems in RX.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

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

Signed-off-by: NVivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Signed-off-by: NVivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch adds support for a modified newer version of AR9285
chipsets.
Signed-off-by: NVivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

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

For USB devices, this check is invalid.
Remove the check so that new product IDs can be added.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This can be used to store the bus types ( AHB/PCI/USB ).
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

commits 8e6f5aa2 and
db1a052b accidentally introduced
compile errors that happens when ath9k debug is not enabled.
This patch fixes the declaration of the inline stubs to resolve this.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

ah->mask_reg was used to hold different data throughout the driver.
ath9k_hw_init_interrupt_masks() used it to save the value written to
AR_IMR.  ath9k_hw_set_interrupts() used it to hold the interrupt mask as
defined in enum ath9k_int.  Those masks differ in many bits.

Use ah->imask instead of ah->mask_reg in ath9k_hw_set_interrupts() and
ath9k_hw_updatetxtriglevel().  That's what the code was meant to do.
ah->imask is initialized in ath9k_start(), so we don't need to
initialize it from ah->mask_reg.

Once it's done, ah->mask_reg becomes write-only, so it's replaced with a
local variable in ath9k_hw_init_interrupt_masks().
Signed-off-by: NPavel Roskin <proski@gnu.org>
Reported-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Add ah variable in the functions that didn't have it and used sc->imask.
Replace sc->sc_ah with ah in those functions.
Signed-off-by: NPavel Roskin <proski@gnu.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Symbols starting with "ATH9K_INT" are also used for interrupt mask.
Signed-off-by: NPavel Roskin <proski@gnu.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

With the enable_radio being uninitialized, ath_radio_enable() might be
called twice, which can leave some hardware in an undefined state.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

mac80211 skips drop_unencrypted checks if the driver/firmware has
already taken care of this. In case of ath9k, we must not indicate
that the frame was decrypted if no decryption was actually done.
Signed-off-by: NJouni Malinen <j@w1.fi>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Set IEEE80211_HW_RX_INCLUDES_FCS to indicate that
the FCS is present in RX frames. Also, remove a redundant
assignment of skb length and include the FCS_LEN
when checking padding.

Fixing this issue makes TKIP work.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

ath_tx_status and ath_rx_status data are only necessary for a short
time, until they have been processed and converted into mac80211 data
structures.
Because of that, it makes no sense to keep them tied to the DMA
descriptor, that only wastes precious memory.
This patch allocates the data on stack in the functions that call the
conversion functions from ath9k_hw.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch passes in a pointer to the ath_rx_status data structure for
functions that need it, instead of letting them grab it directly from
the ath_desc struct. This is useful for making it possible to allocate
the intermediate rx status data separately.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch passes in a pointer to the ath_tx_status data structure for
functions that need it, instead of letting them grab it directly from
the ath_desc struct. This is useful for making it possible to allocate
the intermediate tx status data separately.
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Not setting the opmode properly during initialization
results in the firmware sending up a bunch of packets
before add_interface() has been called, for the first
interface.

This patch fixes the issue by setting the initial mode
to 'managed'.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Stop/restart TX queues when the internal SKB
queue is full. This helps handle TX better
under heavy load.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

This patch introduces the usage of URB anchors,
thus reducing a large amount of code dealing with
URB maintenance within the driver. The RX callback now
takes care of freeing the SKB associated with each URB.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Skip beyond the watchdog pattern properly.
This fixes occasional failure of the driver to load.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Accessing the sta pointer in TX completion without
approprate RCU protection is wrong. Fix this.

Also, RCU protection is needed when the station's
aggregation state is updated. Handle this properly.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

The calculation of RX filter is fairly different
between ath9k and ath9k_htc, trying to make this
common between the two drivers would result in code churn.

While at it, remove the handling of PSPOLL filter,
it can be added when(if) AP support is added to ath9k_htc.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

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

Features:

 * Station mode
 * IBSS mode
 * Monitor mode
 * Legacy support
 * HT support
 * TX/RX 11n Aggregation
 * HW encryption
 * LED
 * Suspend/Resume

For more information: http://wireless.kernel.org/en/users/Drivers/ath9k_htcSigned-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NSenthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Without this you will get a panic if the device initialization
fails. Also, free ath_hw instance properly. ath9k_hw_deinit()
shouldn't do it.

Cc: stable@kernel.org
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

AR9271 needs a full reset only upon the first reset, add
a call for the driver to enable these special resets. We
can optimize this out later without an export.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

When initializing the PLL on AR9271 we always need
to set the core clock to 117MHz. While at it remove
the baud rate settings for the serial device on the
AR9271, the default settings work well unless you
want to customize it.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Periodic power amplifier offset calibration is skipped on ath9k
algorithmically, this is required on AR9271.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

Noisefloor values read on AR9271 are unreliable if they
are less than -114, set those statically to -116.
Signed-off-by: NSujith <Sujith.Manoharan@atheros.com>
Signed-off-by: NVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>