[v5,0/2] add ISO7816 support

Message

Ludovic Desroches Sept. 26, 2018, 12:58 p.m. UTC

Hi,

This patchset adds support for the ISO7816 standard. The USART devices
in Microchip SoCs have an ISO7816 mode. It allows to let the USART
managing the CLK and I/O signals of a smart card.

Changes:
- v5
  - rebase on tty-next.
  - add documentation for the new ioctls (mimic rs485 one).
  - fix a switch/case identation
- v4
  - use the IP version number instead of the compatible string to set
  min and max values for fidi.
  - remove a useless macro for fidi.
- v3
  - add IOCTLs to parisc arch.
  - rework atmel_config_iso7816 according to the comments by Richard.
  - keep max iteration hard coded. Will see later if the user need to
    set this value. It may also concern the normal/inverse mode.
  - improve the checking of the value from the user space.
- v2
  - uart_get_iso7816_config: check there is an iso7816_config function.
  - use IOCTL macros to generate the IOCTL number.
  - check that reserved field is not used.
  - remove debug logs.
  - check that the iso7816_config is right before doing any action.
  - change the error from nack and max iteration status to a debug
    message.
  - remove patch 3 as it concerns both rs485 and iso7816 to think more
    about the need of adding a lock or not.

Nicolas Ferre (2):
  tty/serial_core: add ISO7816 infrastructure
  tty/serial: atmel: add ISO7816 support

 Documentation/serial/serial-iso7816.txt |  83 ++++++++++++++
 arch/alpha/include/uapi/asm/ioctls.h    |   2 +
 arch/mips/include/uapi/asm/ioctls.h     |   2 +
 arch/parisc/include/uapi/asm/ioctls.h   |   2 +
 arch/powerpc/include/uapi/asm/ioctls.h  |   2 +
 arch/sh/include/uapi/asm/ioctls.h       |   2 +
 arch/sparc/include/uapi/asm/ioctls.h    |   2 +
 arch/xtensa/include/uapi/asm/ioctls.h   |   2 +
 drivers/tty/serial/atmel_serial.c       | 190 ++++++++++++++++++++++++++++++--
 drivers/tty/serial/atmel_serial.h       |   3 +-
 drivers/tty/serial/serial_core.c        |  60 ++++++++++
 include/linux/serial_core.h             |   3 +
 include/uapi/asm-generic/ioctls.h       |   2 +
 include/uapi/linux/serial.h             |  17 +++
 14 files changed, 360 insertions(+), 12 deletions(-)
 create mode 100644 Documentation/serial/serial-iso7816.txt