linux-toradex.git/drivers/nfc, branch v3.5.7 Linux kernel for Apalis and Colibri modules NFC: potential integer overflow problem in check_crc() 2012-05-25T15:16:16+00:00 Dan Carpenter dan.carpenter@oracle.com 2012-05-18T07:36:47+00:00 885ba1da689299ec52e646ca1a2429b8de55f364 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> 
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>
NFC: HCI based pn544 driver 2012-05-15T21:30:30+00:00 Eric Lapuyade eric.lapuyade@intel.com 2012-05-07T10:31:29+00:00 bbed0deefbb4bb1ab09e0dbc29e00fda86bb7838 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> 
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>
NFC: Remove unneeded pn533 dev NULL check 2012-05-15T21:28:01+00:00 Dan Carpenter dan.carpenter@oracle.com 2012-05-07T10:31:18+00:00 0f909361062d42b0ff7c6522e2347b56a0bf43cc 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> 
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>
NFC: Cache the core NFC active target pointer instead of its index 2012-05-15T21:27:59+00:00 Eric Lapuyade eric.lapuyade@intel.com 2012-05-07T10:31:13+00:00 900994332675f84a9fbbb33ff089474614c7f2fe 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> 
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>
NFC: pn533 Rx chaining support 2012-04-12T19:10:44+00:00 Samuel Ortiz sameo@linux.intel.com 2012-04-10T17:43:18+00:00 6ff73fd239ff5d6f1ebfe5b5f7f560d9fad7d749 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> 
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>
NFC: Convert pn533 from tasklet to workqueues 2012-04-12T19:10:43+00:00 Samuel Ortiz sameo@linux.intel.com 2012-04-10T17:43:17+00:00 4849f85ee36db94033a7c8b32689458d6f435e80 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> 
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>
NFC: Remove the rf mode parameter from the DEP link up routine 2012-03-06T20:16:23+00:00 Samuel Ortiz sameo@linux.intel.com 2012-03-05T00:03:50+00:00 47807d3dbb62e93850cbcb797db1a9ee1806f986 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> 
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>
NFC: Export NFCID when detecting a p2p target with pn533 2012-03-06T20:16:23+00:00 Samuel Ortiz sameo@linux.intel.com 2012-03-05T00:03:47+00:00 2fbabfa467ce945deb92bf04c745b4d101fc21ee Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> 
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
NFC: Export Jewel/Topaz ID from pn533 2012-03-06T20:16:22+00:00 Samuel Ortiz sameo@linux.intel.com 2012-03-05T00:03:46+00:00 d8dc107248d336695ca6a964c5ffdc2f4d160a04 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> 
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>
NFC: Export sensf from pn533 2012-03-06T20:16:22+00:00 Samuel Ortiz sameo@linux.intel.com 2012-03-05T00:03:45+00:00 7975754f61b8e87ad0b34509a94c54c8d19ea15d 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> 
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>