Commit Graph

45 Commits

Author SHA1 Message Date
Eric Lapuyade a10d595b10 NFC: Allow HCI driver to pre-open pipes to some gates
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>
2012-07-09 16:42:12 -04:00
Eric Lapuyade 456411ca81 NFC: Driver failure API
This API should be used by drivers, HCI, SHDLC or NCI stacks to report an
unrecoverable error.

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-07-09 16:42:08 -04:00
Eric Lapuyade a9a741a7e2 NFC: Prepare asynchronous error management for driver and shdlc
Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-07-09 16:42:04 -04:00
Samuel Ortiz 73167ced31 NFC: Introduce target mode rx data callback
This routine will be called by drivers whenever they receive data in target
mode. This should be unexpected events and as such should be handled by a
standalone API (i.e. not as a callback pointer from an existing API).

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-06-04 21:34:31 +02:00
Samuel Ortiz be9ae4ce4e NFC: Introduce target mode tx ops
And rename the initiator mode data exchange ops for consistency sake.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-06-04 21:34:30 +02:00
Samuel Ortiz f212ad5e99 NFC: Set the NFC device RF mode appropriately
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-06-04 21:34:30 +02:00
Samuel Ortiz fc40a8c1a0 NFC: Add target mode activation netlink event
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>
2012-06-04 21:34:30 +02:00
Samuel Ortiz fe7c580073 NFC: Add target mode protocols to the polling loop startup routine
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-06-04 21:34:29 +02:00
Samuel Ortiz ab73b75130 NFC: Export LLCP general bytes getter
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-06-04 21:34:29 +02:00
Eric Lapuyade 03bed29e05 NFC: HCI drivers don't have to keep track of polling state
The NFC core code already does that for them.

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>
2012-05-15 17:31:22 -04:00
Eric Lapuyade 1676f75159 NFC: Add HCI/SHDLC support to let driver check for tag presence
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>
2012-05-15 17:28:00 -04:00
Eric Lapuyade d4ccb13280 NFC: Specify usage for targets found and target lost events
It is now specified that nfc_target_found() and nfc_target_lost() core
functions must not be called from an atomic context. This allow us to
serialize calls and protect the targets table using the nfc device lock
instead of a spinlock.

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>
2012-05-15 17:28:00 -04:00
Eric Lapuyade addfabf98d NFC: Remove useless HCI private nfc target table
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>
2012-05-15 17:28:00 -04:00
Eric Lapuyade 9009943326 NFC: Cache the core NFC active target pointer instead of its index
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>
2012-05-15 17:27:59 -04:00
John W. Linville 59ef43e681 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
	drivers/net/wireless/iwlwifi/iwl-testmode.c
	include/net/nfc/nfc.h
	net/nfc/netlink.c
	net/wireless/nl80211.c
2012-04-18 14:27:48 -04:00
Eric Dumazet 95c9617472 net: cleanup unsigned to unsigned int
Use of "unsigned int" is preferred to bare "unsigned" in net tree.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-04-15 12:44:40 -04:00
Eric Lapuyade c8d56ae786 NFC: Add Core support to generate tag lost event
Some HW/drivers get notifications when a tag moves out of the radio field.
This notification is now forwarded to user space through netlink.

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>
2012-04-12 15:10:39 -04:00
Eric Lapuyade 144612cacc NFC: Changed target activated state logic
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>
2012-04-12 15:10:38 -04:00
Eric Lapuyade 01ae0eea9b NFC: Fix next target_idx type and rename for clarity
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>
2012-04-12 15:10:37 -04:00
Samuel Ortiz c4fbb6515a NFC: The core part should generate the target index
The target index can be used by userspace to uniquely identify a target
and thus should be kept unique, per NFC adapter. Moreover, some protocols
do not provide a logical index when discovering new targets, so we have to
generate one for them.
For NCI or pn533 to fetch their logical index, we added a logical_idx field
to the target structure.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-04-12 15:10:37 -04:00
Eric Lapuyade eb738fe535 NFC: SHDLC implementation
Most NFC HCI chipsets actually use a simplified HDLC link layer to
carry HCI payloads.
This implementation registers itself as an HCI device on behalf of the
NFC driver.

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>
2012-04-12 15:10:35 -04:00
Eric Lapuyade 8b8d2e08bf NFC: HCI support
This is an implementation of ETSI TS 102 622 specification.
Many NFC chipsets use HCI as the host <-> target protocol on top of a
serial link like i2c.

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>
2012-04-12 15:10:34 -04:00
Eric Lapuyade e1da0efa2e NFC: Export target lost function
NFC drivers will call this routine when they detect that a tag leaves the
RF field. This will eventually lead to the corresponding netlink event
to be sent.

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>
2012-04-12 15:10:34 -04:00
Samuel Ortiz eb9bc6e9a0 NFC: NCI code identation fixes
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-03-06 15:16:25 -05:00
Samuel Ortiz 0a40acb246 NFC: Core code identation fixes
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-03-06 15:16:25 -05:00
Samuel Ortiz 47807d3dbb NFC: Remove the rf mode parameter from the DEP link up routine
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>
2012-03-06 15:16:23 -05:00
Ilan Elias 019c4fbaa7 NFC: Add NCI multiple targets support
Add the ability to select between multiple targets in NCI.
If only one target is found, it will be auto-activated.
If more than one target is found, then DISCOVER_NTF will be
generated for each target, and the host should select one by
calling DISCOVER_SELECT_CMD. Then, the target will be activated.
If the activation fails, GENERIC_ERROR_NTF is generated.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-24 14:32:29 -05:00
Ilan Elias 25a1d9dc85 NFC: NFC core layer should not set the target_idx
The NFC core layer should not set the target_idx.
Instead, the driver layer (e.g. NCI, PN533) should set the
target_idx, so that it will be able to identify the target
when its I/F (e.g. activate_target) is called.
This is required in order to support multiple targets.
Note that currently supported drivers (PN533 and NCI) don't
use the target_idx in their implementation.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-24 14:32:28 -05:00
Ilan Elias 8939e47fc9 NFC: Clearly separate NCI states from flags
Make a clear separation between NCI states and flags.
This is required in order to support more NCI states (e.g.
for multiple targets support).

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-24 14:32:28 -05:00
Ilan Elias c4bf98b220 NFC: Add NCI data exchange timer
Add NCI data exchange timer to catch timeouts,
and call the data exchange callback with an error.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-24 14:21:55 -05:00
Ilan Elias d5a2ca60e4 NFC: Export new attributes sensb_res and sensf_res
Export new attributes sensb_res for tech B and sensf_res
for tech F in the target info (returned as a response to
NFC_CMD_GET_TARGET).
The max size of the attributes nfcid1, sensb_res and sensf_res
is exported to user space though include/linux/nfc.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-24 14:21:15 -05:00
Ilan Elias 11ee51589a NFC: Increase NCI deactivate timeout
Increase NCI deactivate timeout from 5 sec to 30 sec.
NCI deactivate procedure might take a long time,
depending on the local and remote parameters.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-24 14:08:39 -05:00
Ilan Elias 288e0713f4 NFC: Export a new attribute nfcid1 in target info
The nfcid1 is the NFC-A identifier.
It is exported as an attribute of the target info
(returned as a response to NFC_CMD_GET_TARGET).

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-04 14:30:43 -05:00
Ilan Elias 004161cb52 NFC: Handle error during NCI data exchange
Add support for NCI Interface Error Notification.
When this notification is received and we're during a
data exchange transaction, indicate an error to the NFC
core layer via the data exchange callback.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-04 14:30:39 -05:00
Ilan Elias 637d85a7cd NFC: Update names and structs to NCI spec 1.0 d22
Addition, deletion, and modification of NCI constants.
Changes in NCI commands, responses, and notifications structures.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-04 14:30:39 -05:00
Samuel Ortiz 541d920b05 NFC: Set and get DEP general bytes
Without an API for setting and getting the local and remote general bytes,
drivers won't be able to properly establish a DEP link.
This API also allows them to propagate the remote general bytes they get
from the DEP link establishment up to the LLCP layer.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-12-14 14:50:13 -05:00
Samuel Ortiz 1ed28f6106 NFC: Add a DEP link control netlink command
NFC-DEP (Data Exchange Protocol) is an NFC MAC layer.
This command allows to enable and disable the DEP link on to which e.g.
LLCP can run.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-12-14 14:50:12 -05:00
Samuel Ortiz 7c7cd3bfec NFC: Add tx skb allocation routine
This is a factorization of the current rawsock tx skb allocation routine,
as it will be used by the LLCP code.
We also rename nfc_alloc_skb to nfc_alloc_recv_skb for consistency sake.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-12-14 14:50:12 -05:00
Ilan Elias ccb290fccc NFC: Fix indentation in nci.h file
Fix indentation in nci.h file.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-11-17 15:43:55 -05:00
Ilan Elias db98c829b7 NFC: Check if NCI data flow control is used
Check if NCI data flow control is used in nci_tx_work.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-11-11 12:32:50 -05:00
Ilan Elias ee4c64fb98 NFC: Removal of unused operations for NCI spec 1.0 d18
Remove unused NCI operations, e.g. create static rf connection.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-11-11 12:32:50 -05:00
Ilan Elias e8c0dacd98 NFC: Update names and structs to NCI spec 1.0 d18
Addition, deletion and modification of NCI constants.
Changes in NCI commands, responses and notifications structures.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-11-11 12:32:50 -05:00
Ilan Elias 38f04c6b1b NFC: protect nci_data_exchange transactions
Protect 'cb' and 'cb_context' arguments in nci_data_exchange.
In fact, this implements a queue with max length of 1 data
exchange transactions in parallel.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-09-27 14:34:05 -04:00
Ilan Elias 6a2968aaf5 NFC: basic NCI protocol implementation
The NFC Controller Interface (NCI) is a standard
communication protocol between an NFC Controller (NFCC)
and a Device Host (DH), defined by the NFC Forum.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-09-20 14:43:49 -04:00
Ilan Elias 55eb94f9e9 NFC: move nfc.h from include/net to include/net/nfc
The file nfc.h was moved from include/net to include/net/nfc,
since new NFC header files will be added to include/net/nfc.

Signed-off-by: Ilan Elias <ilane@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-09-20 14:43:49 -04:00