Commit Graph

571 Commits

Author SHA1 Message Date
Masahiro Yamada 0cf2a848ef scripts/spelling.txt: add "omited" pattern and fix typo instances
Fix typos and add the following to the scripts/spelling.txt:

  omited||omitted
  omiting||omitting

Link: http://lkml.kernel.org/r/1481573103-11329-26-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-02-27 18:43:47 -08:00
Alexander Usyskin 7c7a6077f5 mei: bus: split RX and async notification callbacks
Split callbacks for RX and async notification events on mei bus to
eliminate synchronization problems and to open way for RX optimizations.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-17 16:37:49 +01:00
Greg Kroah-Hartman b7d91c9152 Merge 4.9-rc5 into char-misc-next
We want those fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-11-14 16:39:47 +01:00
Alexander Usyskin 582ab27a06 mei: bus: fix received data size check in NFC fixup
NFC version reply size checked against only header size, not against
full message size. That may lead potentially to uninitialized memory access
in version data.

That leads to warnings when version data is accessed:
drivers/misc/mei/bus-fixup.c: warning: '*((void *)&ver+11)' may be used uninitialized in this function [-Wuninitialized]:  => 212:2

Reported in
Build regressions/improvements in v4.9-rc3
https://lkml.org/lkml/2016/10/30/57

Fixes: 59fcd7c63a (mei: nfc: Initial nfc implementation)
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-31 10:25:22 -06:00
Tomas Winkler 1e4edb3fe9 mei: bus: remove rx callback context
The callback context is redunant as all the information can be
retrived from the device struture of its private data.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28 08:21:22 -04:00
Tomas Winkler 972cedf6e3 nfc: mei_phy: get phy from the driver data
In order to remove rather redundant context from the callback
signature we the get nfc mei_phy from the driver's data.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28 08:21:22 -04:00
Tomas Winkler 094dbffedc nfc: mei: use module_mei_cl_driver macro
Replace boilerplate driver registration with module_mei_cl_driver
macro in pn544 and microread devices.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-10-28 08:21:21 -04:00
David S. Miller 276b8c77c3 NFC 4.8 pull request
This is the first NFC pull request for 4.8. We have:
 
 - A fairly large NFC digital stack patchset:
   * RTOX fixes.
   * Proper DEP RWT support.
   * ACK and NACK PDUs handling fixes, in both initiator
     and target modes.
   * A few memory leak fixes.
 
 - A conversion of the nfcsim driver to use the digital stack.
   The driver supports the DEP protocol in both NFC-A and NFC-F.
 
 - Error injection through debugfs for the nfcsim driver.
 
 - Improvements to the port100 driver for the Sony USB chipset, in
   particular to the command abort and cancellation code paths.
 
 - A few minor fixes for the pn533, trf7970a and fdp drivers.
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Merge tag 'nfc-next-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-next

Samuel Ortiz says:

====================
NFC 4.8 pull request

This is the first NFC pull request for 4.8. We have:

- A fairly large NFC digital stack patchset:
  * RTOX fixes.
  * Proper DEP RWT support.
  * ACK and NACK PDUs handling fixes, in both initiator
    and target modes.
  * A few memory leak fixes.

- A conversion of the nfcsim driver to use the digital stack.
  The driver supports the DEP protocol in both NFC-A and NFC-F.

- Error injection through debugfs for the nfcsim driver.

- Improvements to the port100 driver for the Sony USB chipset, in
  particular to the command abort and cancellation code paths.

- A few minor fixes for the pn533, trf7970a and fdp drivers.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-07-20 23:39:36 -07:00
Thierry Escande 2a0fe4fe5b NFC: nfcsim: Simulate lost frames through debugfs entry
This patch allows to simulate the lost of frames exchanged between the 2
nfcsim devices through a control entry in the debugfs and is used as
follow:

 echo n > /sys/kernel/debug/nfcsim/nfcX/dropframe

Where n specifies the number of frames to be dropped between 0 and 255
and nfcX is either nfc0 or nfc1, one of the two nfcsim devices.

In the following example, the next frame that should be sent by the nfc0
device will be dropped and thus not received by the nfc1 device:

 echo 1 > /sys/kernel/debug/nfcsim/nfc0/dropframe

The value of 0 can be used to reset the dropframe counter.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-19 23:24:49 +02:00
Thierry Escande f9ac6273e5 NFC: nfcsim: Add support for sysfs control entry
The idea is to have a way to control and/or modify the behavior of the
nfcsim virtual devices.

This patch creates a folder tree in the debug filesystem. The debugfs is
usually mounted into /sys/kernel/debug and the nfcsim entries are
located in DEBUGFS/nfcsim/nfcX/ where X is either 0 or 1 depending on
the device you want to address.

These folders are empty for now and control entries will be added by
upcoming commits.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-19 23:23:29 +02:00
Geert Uytterhoeven 4360fa22ad drivers: misc: ti-st: Use int instead of fuzzy char for callback status
On mips and parisc:

    drivers/bluetooth/btwilink.c: In function 'ti_st_open':
    drivers/bluetooth/btwilink.c:174:21: warning: overflow in implicit constant conversion [-Woverflow]
       hst->reg_status = -EINPROGRESS;

    drivers/nfc/nfcwilink.c: In function 'nfcwilink_open':
    drivers/nfc/nfcwilink.c:396:31: warning: overflow in implicit constant conversion [-Woverflow]
      drv->st_register_cb_status = -EINPROGRESS;

There are actually two issues:
  1. Whether "char" is signed or unsigned depends on the architecture.
     As the completion callback data is used to pass a (negative) error
     code, it should always be signed.
  2. EINPROGRESS is 150 on mips, 245 on parisc.
     Hence -EINPROGRESS doesn't fit in a signed 8-bit number.

Change the callback status from "char" to "int" to fix these.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-07-17 19:59:26 +02:00
Thierry Escande 8f49bec6c3 NFC: nfcsim: Fix missing dependency on NFC_DIGITAL
The nfcsim driver now depends on the Digital layer. This patch adds the
missing dependency on NFC_DIGITAL for NFC_SIM config.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-06 10:02:09 +02:00
Thierry Escande 9f0c4542c4 NFC: port100: Abort current command before switching RF off
If a command is still being processed by the device, the switch RF off
command will be rejected. With this patch, the port100 driver calls
port100_abort_cmd() before sending the switch RF off command.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-06 10:02:08 +02:00
Thierry Escande a52bd7d275 NFC: port100: Make port100_abort_cmd() synchronous
This patch makes the abort_cmd function synchronous. This allows the
caller to immediately send a new command after abort_cmd() returns.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-06 10:02:08 +02:00
Thierry Escande b74584c1a6 NFC: port100: Fix the command cancellation process
The USB out_urb used to send commands to the device can be submitted
through the standard command processing queue coming from the Digital
Protocol layer but it can also be submitted from port100_abort_cmd().

To not submit the URB while already active, a mutex is now used to
protect it and a cmd_cancel flag is used to not send command while
canceling the previous one.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-06 10:02:07 +02:00
Thierry Escande e3e0258839 NFC: port100: Don't send a new command if one is still pending
This patch ensures that a command is not still in process before sending
a new one to the device. This can happen when neard is in constant
polling mode: the configure_hw command can be sent when neard restarts
polling after a LLCP SYMM timeout but before the device has returned in
timeout from the last DEP frame sent.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-06 10:02:07 +02:00
Thierry Escande 204bddcb50 NFC: nfcsim: Make use of the Digital layer
With this complete rewrite, the loopback nfcsim driver now relies on the
Digital layer of the nfc stack. As with the previous version, 2 nfc
devices are declared when the driver is initialized. The driver supports
the NFC_DEP protocol in NFC-A and NFC-F technologies.

The 2 devices are using a pair of virtual links for sk_buff exchange.
The out-link of one device is the in-link of the other and conversely.

To receive data, a device calls nfcsim_link_recv_skb() on its in-link
and waits for incoming data on a wait queue. To send data, a device
calls nfcsim_link_send_skb() on its out-link which stores the passed skb
and signals its wait queue. If the peer device was in the
nfcsim_link_recv_skb() call, it will be signaled and will be able to
pass the received sk_buff up to the Digital layer.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-04 12:36:30 +02:00
Thierry Escande a81ba50a89 NFC: port100: Explicitly set NFC-F framing for NFC-DEP
When setting the driver framing as NFC_DIGITAL_FRAMING_NFCF_NFC_DEP it
used to be already configured as NFC_DIGITAL_FRAMING_NFCF which is the
same. So this entry was empty in the in_protocols table.
Now that the digital stack can handle PLS requests, it can be changed
on the fly from NFC_DIGITAL_FRAMING_NFCA_NFC_DEP.
This patch explicitly defines the framing configuration values for
NFC_DIGITAL_FRAMING_NFCF_NFC_DEP.

Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-04 12:26:27 +02:00
Geoff Lansberry 58d46f538b NFC: trf7970a: add TI recommended write of zero to Register 0x18
Signed-off-by: Geoff Lansberry <geoff@kuvee.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-04 12:20:21 +02:00
Geert Uytterhoeven fa1ce54ea3 NFC: fdp: Detect errors from fdp_nci_create_conn()
drivers/nfc/fdp/fdp.c: In function ‘fdp_nci_patch_otp’:
drivers/nfc/fdp/fdp.c:373: warning: comparison is always false due to limited range of data type
drivers/nfc/fdp/fdp.c: In function ‘fdp_nci_patch_ram’:
drivers/nfc/fdp/fdp.c:444: warning: comparison is always false due to limited range of data type

fdp_nci_create_conn() may return a negative error code, which is
silently ignored by assigning it to a u8.

Change conn_id from u8 to int to fix this.

Fixes: a06347c04c ("NFC: Add Intel Fields Peak NFC solution driver")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-04 12:17:56 +02:00
Dan Carpenter 6d2f70cae4 NFC: pn533: double free on error in probe()
We can't pass devm_ allocated pointers to kfree() because they will be
freed again after the drive is unloaded.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-04 12:15:00 +02:00
Colin Ian King f36acc334f NFC: set info->ram_patch to NULL when it is released
When info->ram_patch is released info->otp_patch is being set
to NULL rather than info->ram_patch. I believe this is a cut-n-paste
bug from almost identical code proceeding it that uses the same
idiom for info->otp_patch.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-07-04 12:11:54 +02:00
Michael Thalmeier b31d5103c3 NFC: pn533: handle interrupted commands in pn533_recv_frame
When pn533_recv_frame is called from within abort_command
context the current  dev->cmd is not guaranteed to be set.

Additionally on receiving an error status we can omit frame
checking and simply schedule the workqueue.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-10 00:01:47 +02:00
Michael Thalmeier c952f915ce NFC: pn533: reset poll modulation list before calling targets_found
We need to reset the poll modulation list before calling
nfc_targets_found because otherwise userspace could run
before the modulation list is cleared and then get a "Cannot
activate target while polling" error upon calling activate_target.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-10 00:01:16 +02:00
Michael Thalmeier 30f98489f5 NFC: pn533: i2c: do not call pn533_recv_frame with aborted commands
When a command gets aborted the pn533 core does not need any RX
frames that may be received until a new frame is sent.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-09 23:59:47 +02:00
Michael Thalmeier b16931b13c NFC: pn533: fix order of initialization
Correctly call nfc_set_parent_dev before nfc_register_device.
Otherwise the driver will OOPS when being removed.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-09 23:59:18 +02:00
Michael Thalmeier 79f09fa79c NFC: pn533: i2c: free irq on driver remove
The requested irq needs to be freed when removing the driver,
otherwise a following driver load fails to request the irq.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-09 23:56:23 +02:00
Christophe Ricard 3aacd7fe55 nfc: st-nci: Move loopback usage from HCI to NCI
NCI provides possible way to run loopback testing has done over HCI.

For us it offers many advantages:
- It simplifies the code: No more need for a vendor_cmds structure
- Loopback over HCI may not be supported in future st-nci firmware

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:51:42 +02:00
Christophe Ricard 9b8d1a4cf2 nfc: nci: Add an additional parameter to identify a connection id
According to NCI specification, destination type and destination
specific parameters shall uniquely identify a single destination
for the Logical Connection.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:43:21 +02:00
Christophe Ricard 99adc394f2 nfc: st21nfca: Remove duplicated ST21NFCA_ESE_HOST_ID from se.c
ST21NFCA_ESE_HOST_ID is already defined in st21nfca.h.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:40:28 +02:00
Christophe Ricard c50e8fef7b nfc: st-nci: Remove redundant ST_NCI_HCI_HOST_ID_ESE from st-nci.h
ST_NCI_HCI_HOST_ID_ESE is already having an equivalent in se.c
(ST_NCI_ESE_HOST_ID).

Remove and replace where relevant.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:39:36 +02:00
Christophe Ricard 1f34b20404 NFC: st-nci: spi: Drop two useless checks in ACPI probe path
When st_nci_spi_acpi_request_resources() gets called we
already know that the entries in ->acpi_match_table have
matched ACPI ID of the device.
In addition spi_device pointer cannot be NULL in any case
(otherwise SPI core would not call ->probe() for the driver
in the first place).

Drop the two useless checks from the driver.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:38:13 +02:00
Christophe Ricard 4ac52a0fd0 NFC: st-nci: i2c: Drop two useless checks in ACPI probe path
When st_nci_i2c_acpi_request_resources() gets called we already
know that the entries in ->acpi_match_table have matched ACPI ID
of the device.
In addition I2C client pointer cannot be NULL in any case
(otherwise I2C core would not call ->probe() for the driver in
the first place).

Drop the two useless checks from the driver.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:37:13 +02:00
Christophe Ricard 070718a499 NFC: st21nfca: Drop two useless checks in ACPI probe path
When st21nfca_hci_i2c_acpi_request_resources() gets called we
already know that the entries in ->acpi_match_table have matched
ACPI ID of the device.
In addition I2C client pointer cannot be NULL in any case
(otherwise I2C core would not call ->probe() for the driver in
the first place).

Drop the two useless checks from the driver.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:36:24 +02:00
Christophe Ricard 7cb6ab590d nfc: st21nfca: A APDU_READER_GATE pipe is unexpected on a UICC
An APDU_READER_GATE pipe is not expected on a UICC. Be more
explicit so that an other secure element form factor (SD card)
does not prompt this message.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:33:52 +02:00
Christophe Ricard 0209e79d54 nfc: st-nci: A APDU_READER_GATE pipe is unexpected on a UICC
An APDU_READER_GATE pipe is not expected on a UICC. Be more
explicit so that an other secure element form factor (SD card)
does not prompt this message.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:33:08 +02:00
Christophe Ricard cde4856e61 nfc: st-nci: Simplify white list building
Simplify white list Building

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:32:25 +02:00
Christophe Ricard d35cb20b41 nfc: st21nfca: Simplify white list building
Simplify white list Building

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:31:56 +02:00
Christophe Ricard 27420fec40 nfc: st-nci: set is_ese_present and is_uicc_present properly
When they're present, set is_ese_present and set is_uicc_present
to the value describe in their package description.

So far is_ese_present and is_uicc_present was set to true if their
property was present.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:31:07 +02:00
Christophe Ricard bd9d523257 nfc: st21nfca: set is_ese_present and is_uicc_present properly
When they're present, set is_ese_present and set is_uicc_present
to the value describe in their package description.

So far is_ese_present and is_uicc_present was set to true if their
property was present.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:29:57 +02:00
Christophe Ricard 2a19697505 nfc: st21nfca: i2c: Change ST21NFCA_GPIO_NAME_RESET to match DT
Since
commit 10cf4899f8 ("gpiolib: tighten up ACPI legacy gpio lookups")

If _DSD properties are available in an ACPI node, we are not
allowed to fallback to _CRS data to retrieve gpio properties.
This was causing us to fail if uicc-present and/or ese-present
are defined.

To be consistent with devicetree change ST_NCI_GPIO_NAME_RESET
content to reset so that acpi_find_gpio in drivers/gpio/gpiolib.c
will look for reset-gpios. In the mean time the ACPI table needs
to be fixed as follow:

Device (NFC1)
{
    Name (_ADR, Zero)  // _ADR: Address
    Name (_HID, "SMO2100")  // _HID: Hardware ID
    Name (_CID, "SMO2100")  // _CID: Compatible ID
    Name (_DDN, "SMO NFC")  // _DDN: DOS Device Name
    Name (_UID, One)  // _UID: Unique ID
    Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
    {
        Name (SBUF, ResourceTemplate ()
        {
             I2cSerialBus (0x0008, ControllerInitiated, 400000,
                           AddressingMode7Bit, "\\_SB.I2C7",
                           0x00, ResourceConsumer, ,)
             GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
                      "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
             {   // Pin list
                 0x0001
             }
             GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
                     "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
             {   // Pin list
                 0x0002,
             }
        })
        Name (_DSD, Package (0x02)
        {
             ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301") /* Device Properties for _DSD */,
             Package (0x03)
             {
                 Package (0x02) { "uicc-present", 1 },
                 Package (0x02) { "ese-present", 1 },
                 Package (0x02) { "enable-gpios", Package(0x04) { ^NFC1, 1, 0, 0} },
             }
        })
        Return (SBUF) /* \_SB_.I2C7.NFC1._CRS.SBUF */
    }
    Method (_STA, 0, NotSerialized)  // _STA: Status
    {
        Return (0x0F)
    }
}

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:28:47 +02:00
Christophe Ricard de72dbc52c nfc: st-nci: spi: Change ST_NCI_GPIO_NAME_RESET to match DT
Since
commit 10cf4899f8 ("gpiolib: tighten up ACPI legacy gpio lookups")

If _DSD properties are available in an ACPI node, we are not
allowed to fallback to _CRS data to retrieve gpio properties.
This was causing us to fail if uicc-present and/or ese-present
are defined.

To be consistent with devicetree change ST_NCI_GPIO_NAME_RESET
content to reset so that acpi_find_gpio in drivers/gpio/gpiolib.c
will look for reset-gpios. In the mean time the ACPI table needs
to be fixed as follow (Tested on Minnowboard Max):

Device (NFC1)
{
    Name (_ADR, Zero)  // _ADR: Address
    Name (_HID, "SMO2101")  // _HID: Hardware ID
    Name (_CID, "SMO2101")  // _CID: Compatible ID
    Name (_DDN, "SMO NFC")  // _DDN: DOS Device Name
    Name (_UID, One)  // _UID: Unique ID
    Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
    {
        Name (SBUF, ResourceTemplate ()
        {
             SpiSerialBus (0, PolarityLow, FourWireMode, 8,
                           ControllerInitiated, 4000000, ClockPolarityLow,
                           ClockPhaseFirst, "\\_SB.SPI1",
                           0x00, ResourceConsumer, ,)
             GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
                      "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
             {   // Pin list
                 0x0001
             }
             GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
                     "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
             {   // Pin list
                 0x0002,
             }
        })
        Name (_DSD, Package (0x02)
        {
             ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301") /* Device Properties for _DSD */,
             Package (0x03)
             {
                 Package (0x02) { "uicc-present", 1 },
                 Package (0x02) { "ese-present", 1 },
                 Package (0x02) { "reset-gpios", Package(0x04) { ^NFC1, 1, 0, 0} },
             }
        })
        Return (SBUF) /* \_SB_.SPI1.NFC1._CRS.SBUF */
    }
    Method (_STA, 0, NotSerialized)  // _STA: Status
    {
        Return (0x0F)
    }
}

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:27:24 +02:00
Christophe Ricard c1fc9136c8 nfc: st-nci: i2c: Change ST_NCI_GPIO_NAME_RESET to match DT
Since
commit 10cf4899f8 ("gpiolib: tighten up ACPI legacy gpio lookups")

If _DSD properties are available in an ACPI node, we are not
allowed to fallback to _CRS data to retrieve gpio properties.
This was causing us to fail if uicc-present and/or ese-present
are defined.

To be consistent with devicetree change ST_NCI_GPIO_NAME_RESET
content to reset so that acpi_find_gpio in drivers/gpio/gpiolib.c
will look for reset-gpios. In the mean time the ACPI table needs
to be fixed as follow:

Device (NFC1)
{
    Name (_ADR, Zero)  // _ADR: Address
    Name (_HID, "SMO2101")  // _HID: Hardware ID
    Name (_CID, "SMO2101")  // _CID: Compatible ID
    Name (_DDN, "SMO NFC")  // _DDN: DOS Device Name
    Name (_UID, One)  // _UID: Unique ID
    Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
    {
        Name (SBUF, ResourceTemplate ()
        {
             I2cSerialBus (0x0008, ControllerInitiated, 400000,
                           AddressingMode7Bit, "\\_SB.I2C7",
                           0x00, ResourceConsumer, ,)
             GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
                      "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
             {   // Pin list
                 0x0001
             }
             GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
                     "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
             {   // Pin list
                 0x0002,
             }
        })
        Name (_DSD, Package (0x02)
        {
             ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301") /* Device Properties for _DSD */,
             Package (0x03)
             {
                 Package (0x02) { "uicc-present", 1 },
                 Package (0x02) { "ese-present", 1 },
                 Package (0x02) { "reset-gpios", Package(0x04) { ^NFC1, 1, 0, 0} },
             }
        })
        Return (SBUF) /* \_SB_.I2C7.NFC1._CRS.SBUF */
    }
    Method (_STA, 0, NotSerialized)  // _STA: Status
    {
        Return (0x0F)
    }
}

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:26:44 +02:00
Christophe Ricard b58afe6d6d nfc: st21nfca: Fix static checker warning
Fix static checker warning:
drivers/nfc/st21nfca/i2c.c:530 st21nfca_hci_i2c_acpi_request_resources()
error: 'gpiod_ena' dereferencing possible ERR_PTR()

Fix so that if no enable gpio can be retrieved an -ENODEV is returned.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: dfa8070d7f ("nfc: st21nfca: Add support for acpi probing for i2c device.")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-04 01:23:30 +02:00
Krzysztof Kozlowski dfeb87df48 nfc: Drop owner assignment from i2c_driver
i2c_driver does not need to set an owner because i2c_register_driver()
will set it.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-05-01 23:38:14 +02:00
Michael Thalmeier dd7bedcd26 NFC: pn533: add I2C phy driver
This adds the I2C phy interface for the pn533 driver.
This way the driver can be used to interact with I2C
connected pn532 devices.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-04-09 23:53:20 +02:00
Michael Thalmeier 9815c7cf22 NFC: pn533: Separate physical layer from the core implementation
The driver now has all core stuff isolated in one file, and all
the hardware link specifics in another. Writing a pn533 driver
on top of another hardware link is now just a matter of adding a
new file for that new hardware specifics.

The first user of this separation will be the i2c based pn532
driver that reuses pn533 core implementation on top of an i2c
layer.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-04-09 23:53:15 +02:00
Michael Thalmeier 37f895d7e8 NFC: pn533: Fix socket deadlock
A deadlock can occur when the NFC raw socket is closed while
the driver is processing a command.

Following is the call graph of the affected situation:

send data via raw_sock:
-------------
rawsock_tx_work
  sock_hold => socket refcnt++
  nfc_data_exchange => cb = rawsock_data_exchange_complete

    ops->im_transceive = pn533_transceive => arg->cb = db
                               = rawsock_data_exchange_complete

      pn533_send_data_async => cb = pn533_data_exchange_complete

        __pn533_send_async => cmd->complete_cb = cb
                              = pn533_data_exchange_complete

          if_ops->send_frame_async

response:
--------
pn533_recv_response
  queue_work(priv->wq, &priv->cmd_complete_work)

pn533_wq_cmd_complete

  pn533_send_async_complete

    cmd->complete_cb() = pn533_data_exchange_complete()

      arg->cb() = rawsock_data_exchange_complete()

        sock_put => socket refcnt-- => If the corresponding
                    socket gets closed in the meantime socket
                    will be destructed

          sk_free

            __sk_free

              sk->sk_destruct = rawsock_destruct

                nfc_deactivate_target

                  ops->deactivate_target = pn533_deactivate_target

                    pn533_send_cmd_sync

                      pn533_send_cmd_async

                        __pn533_send_async

                          list_add_tail(&cmd->queue,&dev->cmd_queue)
                                  => add to command list because
                                     a command is currently
                                     processed

                        wait_for_completion
                                   => the workqueue thread waits
                                      here because it is the one
                                      processing the commands
                                         => deadlock

To fix the deadlock pn533_deactivate_target is changed to
issue the PN533_CMD_IN_RELEASE command in async mode. This
way nothing blocks and the release command is executed after
the current command.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-04-09 23:53:11 +02:00
Michael Thalmeier e997ebbe46 NFC: pn533: Send ATR_REQ only if NFC_PROTO_NFC_DEP bit is set
Currently it is not possible to only poll for passive targets
with the pn533 driver. To change this ATR_REQ is only sent when
NFC_PROTO_NFC_DEP is explicitly requested in poll_protocols.
As most implementations (e.g. neard) poll for all protocols
that are reported to be supported by the adapter, this should
not have much of an effect on current implementations.

Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2016-04-09 23:53:05 +02:00
Linus Torvalds 1200b6809d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Highlights:

   1) Support more Realtek wireless chips, from Jes Sorenson.

   2) New BPF types for per-cpu hash and arrap maps, from Alexei
      Starovoitov.

   3) Make several TCP sysctls per-namespace, from Nikolay Borisov.

   4) Allow the use of SO_REUSEPORT in order to do per-thread processing
   of incoming TCP/UDP connections.  The muxing can be done using a
   BPF program which hashes the incoming packet.  From Craig Gallek.

   5) Add a multiplexer for TCP streams, to provide a messaged based
      interface.  BPF programs can be used to determine the message
      boundaries.  From Tom Herbert.

   6) Add 802.1AE MACSEC support, from Sabrina Dubroca.

   7) Avoid factorial complexity when taking down an inetdev interface
      with lots of configured addresses.  We were doing things like
      traversing the entire address less for each address removed, and
      flushing the entire netfilter conntrack table for every address as
      well.

   8) Add and use SKB bulk free infrastructure, from Jesper Brouer.

   9) Allow offloading u32 classifiers to hardware, and implement for
      ixgbe, from John Fastabend.

  10) Allow configuring IRQ coalescing parameters on a per-queue basis,
      from Kan Liang.

  11) Extend ethtool so that larger link mode masks can be supported.
      From David Decotigny.

  12) Introduce devlink, which can be used to configure port link types
      (ethernet vs Infiniband, etc.), port splitting, and switch device
      level attributes as a whole.  From Jiri Pirko.

  13) Hardware offload support for flower classifiers, from Amir Vadai.

  14) Add "Local Checksum Offload".  Basically, for a tunneled packet
      the checksum of the outer header is 'constant' (because with the
      checksum field filled into the inner protocol header, the payload
      of the outer frame checksums to 'zero'), and we can take advantage
      of that in various ways.  From Edward Cree"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1548 commits)
  bonding: fix bond_get_stats()
  net: bcmgenet: fix dma api length mismatch
  net/mlx4_core: Fix backward compatibility on VFs
  phy: mdio-thunder: Fix some Kconfig typos
  lan78xx: add ndo_get_stats64
  lan78xx: handle statistics counter rollover
  RDS: TCP: Remove unused constant
  RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket
  net: smc911x: convert pxa dma to dmaengine
  team: remove duplicate set of flag IFF_MULTICAST
  bonding: remove duplicate set of flag IFF_MULTICAST
  net: fix a comment typo
  ethernet: micrel: fix some error codes
  ip_tunnels, bpf: define IP_TUNNEL_OPTS_MAX and use it
  bpf, dst: add and use dst_tclassid helper
  bpf: make skb->tc_classid also readable
  net: mvneta: bm: clarify dependencies
  cls_bpf: reset class and reuse major in da
  ldmvsw: Checkpatch sunvnet.c and sunvnet_common.c
  ldmvsw: Add ldmvsw.c driver code
  ...
2016-03-19 10:05:34 -07:00