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Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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And implement the corresponding hooks for pn544.
Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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And implement the corresponding hooks for pn544.
Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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We need to send continue activation command to allow NFCIP-1
activation when a NFC target has been discovered in type A or
type F reader gate.
Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Set the local general bytes and default value for NFCIP1
Target/Initiator registries if the protocol is NFC-DEP
Signed-off-by: Arron Wang <arron.wang@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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If command allocation failed cmd_lock was not released and deadlock
would occur.
Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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xmit callback provided by a driver encapsulates upper layers
data and sends it to the hardware. So, HCI does not know the
exact amount of data being sent and thus can't handle partially
sent frames properly.
Therefore, the driver must return 0 for completely sent frame or
negative for failure.
Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Acked-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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This was scheduled for 3.6, we're late.
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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The dereference should be moved below the NULL test.
spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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spatch with a semantic match is used to found this.
(http://coccinelle.lip6.fr/)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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The previous shdlc HCI driver and its header are removed from the tree.
PN544 now registers directly with HCI and passes the name of the llc it
requires (shdlc).
HCI instantiation now allocates the required llc instance. The llc is
started when the HCI device is brought up.
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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This enables the completion callback to be called from a different
context, preventing a possible deadlock if the callback resulted in the
invocation of a nested call to the currently locked nfc_dev.
This is also more in line with the im_transceive nfc_ops for NFC Core or
NCI drivers which already behave asynchronously.
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Checksum is specific for a chip spcification and it varies
(in size and type) between different hardware. It should be
handled in the driver then.
Moreover, shdlc spec doesn't mention crc as a part of the frame.
Update pn544_hci driver as well.
Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Acked-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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As we don't have a primary handler but only a threaded one, __setup_irq()
ends up failing if we don't set this flag.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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NFC driver doesn't sit in memory reclaim path and has no reason to use
WQ_MEM_RECLAIM. Drop WQ_MEM_RECLAIM from pn533->wq and use
alloc_ordered_workqueue() instead of WQ_UNBOUND w/ max_active == 1.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Simplify the code by make use of module_platform_driver macro.
Signed-off-by: Syam Sidhardhan <s.syam@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Instead of returning EBUSY when getting a command while another one is
running, we queue them. Upon completion of the pending command, the next
one is processed.
Besides the fact that it simplifies the pn533 locking scheme, it also
comes with the nice side effect of fixing the following warning:
[ 82.274297] =====================================
[ 82.274297] [ BUG: bad unlock balance detected! ]
[ 82.274298] 3.5.0-rc1+ #1 Not tainted
[ 82.274299] -------------------------------------
[ 82.274300] kworker/u:1/16 is trying to release lock (&dev->cmd_lock) at:
[ 82.274305] [<ffffffff8144f246>] mutex_unlock+0x9/0xb
[ 82.274305] but there are no more locks to release!
[ 82.274306]
[ 82.274306] other info that might help us debug this:
[ 82.274306] 2 locks held by kworker/u:1/16:
[ 82.274311] #0: (pn533){.+.+..}, at: [<ffffffff8103a67d>]
+process_one_work+0x145/0x2e2
[ 82.274314] #1: ((&dev->cmd_work)){+.+...}, at: [<ffffffff8103a67d>]
+process_one_work+0x145/0x2e2
[ 82.274314]
[ 82.274314] stack backtrace:
[ 82.274315] Pid: 16, comm: kworker/u:1 Not tainted 3.5.0-rc1+ #1
[ 82.274315] Call Trace:
[ 82.274317] [<ffffffff8144f246>] ? mutex_unlock+0x9/0xb
[ 82.274321] [<ffffffff81059841>] print_unlock_inbalance_bug+0xda/0xe4
[ 82.274323] [<ffffffff8105c74c>] lock_release_non_nested+0xb2/0x232
[ 82.274325] [<ffffffff8105a61e>] ? mark_held_locks+0x6d/0x95
[ 82.274326] [<ffffffff8144f246>] ? mutex_unlock+0x9/0xb
[ 82.274328] [<ffffffff81451105>] ? _raw_spin_unlock_irqrestore+0x40/0x5c
[ 82.274329] [<ffffffff8144f246>] ? mutex_unlock+0x9/0xb
[ 82.274330] [<ffffffff8105ca42>] lock_release+0x176/0x1ac
[ 82.274333] [<ffffffff8123de14>] ? pn533_send_complete+0xa8/0xa8
[ 82.274334] [<ffffffff8144f1d6>] __mutex_unlock_slowpath+0xb0/0x117
[ 82.274336] [<ffffffff8144f246>] mutex_unlock+0x9/0xb
[ 82.274337] [<ffffffff8123de65>] pn533_wq_cmd_complete+0x51/0x55
[ 82.274338] [<ffffffff8103a6db>] process_one_work+0x1a3/0x2e2
[ 82.274340] [<ffffffff8103a67d>] ? process_one_work+0x145/0x2e2
[ 82.274341] [<ffffffff8103b119>] worker_thread+0xcf/0x153
[ 82.274343] [<ffffffff8103b04a>] ? manage_workers.isra.22+0x16b/0x16b
[ 82.274344] [<ffffffff8103b04a>] ? manage_workers.isra.22+0x16b/0x16b
[ 82.274346] [<ffffffff8103eb11>] kthread+0x95/0x9d
[ 82.274348] [<ffffffff81452ef4>] kernel_thread_helper+0x4/0x10
[ 82.274351] [<ffffffff81046561>] ? finish_task_switch+0x45/0xc3
[ 82.274352] [<ffffffff814514f0>] ? retint_restore_args+0x13/0x13
[ 82.274353] [<ffffffff8103ea7c>] ? __init_kthread_worker+0x55/0x55
[ 82.274354] [<ffffffff81452ef0>] ? gs_change+0x13/0x13
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Some devices (e.g. Sony's PaSoRi) can not do type B polling, so we have
to make a distinction between ISO14443 type A and B poll modes.
Cc: Eric Lapuyade <eric.lapuyade@intel.com>
Cc: Ilan Elias <ilane@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Otherwise DATA_EXCHANGE seems to be just fine.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Sony RC-S360 is also known as the Sony PaSoRi contactless reader.
Only type 2, 3 and 4 tag reading is supported at the moment.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Some NFC chips will statically create and open pipes for both standard
and proprietary gates. The driver can now pass this information to HCI
such that HCI will not attempt to create and open them, but will instead
directly use the passed pipe ids.
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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When receiving a DEP link down event, we should cancel all pending URBs
if we're activated as a target or if we're an initiator.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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We get the right baud rate from the last polled modulation.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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After going through all the modulations, the pn533 driver spends 2
seconds listening for targets.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Without those settings several devices will not activate pn533 as a target.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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When trying to enable a DEP link as a passive initiator, pn533 needs to
provide the polling request command payload.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Those define the ATR_RES response timeout after which the pn533 considers the
target to be mute.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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This one needs to be called as soon as we are activated as a target, for
the pn533 to receive the first SYMM and keep the LLCP link alive.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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And rename the initiator mode data exchange ops for consistency sake.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Userspace gets a netlink event upon target mode activation.
The LLCP layer is also signaled when we get an ATR_REQ in order to get
the remote general bytes.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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We only want to support p2p target mode for now, no host card emulation.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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If "buf[0]" is 255 then "len" gets set to 0. The call to
"crc_ccitt(0xffff, buf, len - 2);" casts the "len - 2" to a high
positive number which is ugly.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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This is an NFC driver for NXP pn544.
Unlike pn544.c, this one is based on the NFC HCI and SHDLC kernel layers.
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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container_of() works by subtracting the offset of the member. The math
can't really return a zero here. Sometimes people check it when they
actually meant to check something else but in this case we can just
remove the check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The NFC Core now caches the active nfc target pointer, thereby avoiding
the need to lookup the target table for each invocation of a driver ops.
Consequently, pn533, HCI and NCI now directly receive an nfc_target
pointer instead of a target index.
Cc: Ilan Elias <ilane@ti.com>
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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When buffers on the receiption path exceed 262 bytes, the pn533 uses
a chaining mechanism where the initiator has to send NULL data frames
to fetch the remaining frames.
We do that from a workqueue context while holding the cmd lock. Once the
MI bit is gone, we aggregate the queued received skbs.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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There is no need for soft IRQ contexts, and workqueues are more flexible.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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When calling nfc_dep_link_up, we implicitely are in initiator mode.
Which means we also can provide the general bytes as a function argument,
as all drivers will eventually request them.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The jewel ID is the NFCID1 for Topaz NFC tags.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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sensf is the detection response for Felica NFC tags.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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The polled target structure should be memset to 0 in order to avoid
sel_res and sens_res garbage.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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