linux/drivers/nfc/Kconfig
Christophe Ricard 68957303f4 NFC: ST21NFCA: Add driver for STMicroelectronics ST21NFCA NFC Chip
Add driver for STMicroelectronics ST21NFCA NFC controller.
ST21NFCA is using HCI protocol, shdlc as LLC layer & I2C as
communication protocol.

Adding support for Reader/Writer mode with Tag type 1/2/3/4 A & B.
It is using proprietary gate 15 for ISO14443-3 such as type 1 &
type 2 tags. It is using proprietary gate 14 for type F tags.
ST21NFCA_DEVICE_MGNT_GATE gives access to proprietary CLF configuration.
Standard gate for ISO14443-4 A (13) & B (11) are also used.

ST21NFCA specific mecanism:

One particular point to notice for the data handling is that frame
does not contain any length value. Therefore the i2c part of this driver
is managing the reception with a read length sequence until the end of
frame (0x7e) is reached.

In order to avoid conflict between sof & eof a mecanism
called byte stuffing concist of an escape byte (0x7d) insertion before
special byte (0x7e, 0x7d). The special byte is then xored with 0x20.

In this driver, When data are available in the CLF, the interrupt
gpio is driven to active state and triggered an interrupt.
Once the i2c_master_recv start, the interrupt gpio is driven to idle
state until its complete. If the frame is incomplete or data are still
available, interrupts will be triggered again.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2014-04-22 00:37:25 +02:00

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#
# Near Field Communication (NFC) devices
#
menu "Near Field Communication (NFC) devices"
depends on NFC
config NFC_PN533
tristate "NXP PN533 USB driver"
depends on USB
help
NXP PN533 USB driver.
This driver provides support for NFC NXP PN533 devices.
Say Y here to compile support for PN533 devices into the
kernel or say M to compile it as module (pn533).
config NFC_WILINK
tristate "Texas Instruments NFC WiLink driver"
depends on TI_ST && NFC_NCI
help
This enables the NFC driver for Texas Instrument's BT/FM/GPS/NFC
combo devices. This makes use of shared transport line discipline
core driver to communicate with the NFC core of the combo chip.
Say Y here to compile support for Texas Instrument's NFC WiLink driver
into the kernel or say M to compile it as module.
config NFC_TRF7970A
tristate "Texas Instruments TRF7970a NFC driver"
depends on SPI && NFC_DIGITAL
help
This option enables the NFC driver for Texas Instruments' TRF7970a
device. Such device supports 5 different protocols: ISO14443A,
ISO14443B, FeLiCa, ISO15693 and ISO18000-3.
Say Y here to compile support for TRF7970a into the kernel or
say M to compile it as a module. The module will be called
trf7970a.ko.
config NFC_MEI_PHY
tristate "MEI bus NFC device support"
depends on INTEL_MEI && NFC_HCI
help
This adds support to use an mei bus nfc device. Select this if you
will use an HCI NFC driver for an NFC chip connected behind an
Intel's Management Engine chip.
If unsure, say N.
config NFC_SIM
tristate "NFC hardware simulator driver"
help
This driver declares two virtual NFC devices supporting NFC-DEP
protocol. An LLCP connection can be established between them and
all packets sent from one device is sent back to the other, acting as
loopback devices.
If unsure, say N.
config NFC_PORT100
tristate "Sony NFC Port-100 Series USB device support"
depends on USB
depends on NFC_DIGITAL
help
This adds support for Sony Port-100 chip based USB devices such as the
RC-S380 dongle.
If unsure, say N.
source "drivers/nfc/pn544/Kconfig"
source "drivers/nfc/microread/Kconfig"
source "drivers/nfc/nfcmrvl/Kconfig"
source "drivers/nfc/st21nfca/Kconfig"
endmenu