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tty/serial_core: add ISO7816 infrastructure

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Add the ISO7816 ioctl and associated accessors and data structure.
Drivers can then use this common implementation to handle ISO7816
(smart cards).

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
[ludovic.desroches@microchip.com: squash and rebase, removal of gpios, checkpatch fixes]
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicolas Ferre
2018-09-26 14:58:47 +02:00
committed by Greg Kroah-Hartman
parent c550f01c81
commit ad8c0eaa0a
12 changed files with 179 additions and 0 deletions
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2
include/uapi/asm-generic/ioctls.h
View File

@@ -79,6 +79,8 @@
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCGPTPEER _IO('T', 0x41) /* Safely open the slave */
#define TIOCGISO7816 _IOR('T', 0x42, struct serial_iso7816)
#define TIOCSISO7816 _IOWR('T', 0x43, struct serial_iso7816)
#define FIONCLEX 0x5450
#define FIOCLEX 0x5451

17
include/uapi/linux/serial.h
View File

@@ -132,4 +132,21 @@ struct serial_rs485 {
are a royal PITA .. */
};
/*
* Serial interface for controlling ISO7816 settings on chips with suitable
* support. Set with TIOCSISO7816 and get with TIOCGISO7816 if supported by
* your platform.
*/
struct serial_iso7816 {
__u32 flags; /* ISO7816 feature flags */
#define SER_ISO7816_ENABLED (1 << 0)
#define SER_ISO7816_T_PARAM (0x0f << 4)
#define SER_ISO7816_T(t) (((t) & 0x0f) << 4)
__u32 tg;
__u32 sc_fi;
__u32 sc_di;
__u32 clk;
__u32 reserved[5];
};
#endif /* _UAPI_LINUX_SERIAL_H */