diff options
Diffstat (limited to 'include/uapi/linux/serial.h')
| -rw-r--r-- | include/uapi/linux/serial.h | 75 |
1 files changed, 56 insertions, 19 deletions
diff --git a/include/uapi/linux/serial.h b/include/uapi/linux/serial.h index 93eb3c496ff1..de9b4733607e 100644 --- a/include/uapi/linux/serial.h +++ b/include/uapi/linux/serial.h @@ -11,6 +11,7 @@ #ifndef _UAPI_LINUX_SERIAL_H #define _UAPI_LINUX_SERIAL_H +#include <linux/const.h> #include <linux/types.h> #include <linux/tty_flags.h> @@ -52,11 +53,11 @@ struct serial_struct { #define PORT_16450 2 #define PORT_16550 3 #define PORT_16550A 4 -#define PORT_CIRRUS 5 /* usurped by cyclades.c */ +#define PORT_CIRRUS 5 #define PORT_16650 6 #define PORT_16650V2 7 #define PORT_16750 8 -#define PORT_STARTECH 9 /* usurped by cyclades.c */ +#define PORT_STARTECH 9 #define PORT_16C950 10 /* Oxford Semiconductor */ #define PORT_16654 11 #define PORT_16850 12 @@ -107,29 +108,65 @@ struct serial_icounter_struct { int reserved[9]; }; -/* +/** + * struct serial_rs485 - serial interface for controlling RS485 settings. + * @flags: RS485 feature flags. + * @delay_rts_before_send: Delay before send (milliseconds). + * @delay_rts_after_send: Delay after send (milliseconds). + * @addr_recv: Receive filter for RS485 addressing mode + * (used only when %SER_RS485_ADDR_RECV is set). + * @addr_dest: Destination address for RS485 addressing mode + * (used only when %SER_RS485_ADDR_DEST is set). + * @padding0: Padding (set to zero). + * @padding1: Padding (set to zero). + * @padding: Deprecated, use @padding0 and @padding1 instead. + * Do not use with @addr_recv and @addr_dest (due to + * overlap). + * * Serial interface for controlling RS485 settings on chips with suitable * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your * platform. The set function returns the new state, with any unsupported bits * reverted appropriately. + * + * The flag bits are: + * + * * %SER_RS485_ENABLED - RS485 enabled. + * * %SER_RS485_RTS_ON_SEND - Logical level for RTS pin when sending. + * * %SER_RS485_RTS_AFTER_SEND - Logical level for RTS pin after sent. + * * %SER_RS485_RX_DURING_TX - Full-duplex RS485 line. + * * %SER_RS485_TERMINATE_BUS - Enable bus termination (if supported). + * * %SER_RS485_ADDRB - Enable RS485 addressing mode. + * * %SER_RS485_ADDR_RECV - Receive address filter (enables @addr_recv). Requires %SER_RS485_ADDRB. + * * %SER_RS485_ADDR_DEST - Destination address (enables @addr_dest). Requires %SER_RS485_ADDRB. + * * %SER_RS485_MODE_RS422 - Enable RS422. Requires %SER_RS485_ENABLED. */ - struct serial_rs485 { - __u32 flags; /* RS485 feature flags */ -#define SER_RS485_ENABLED (1 << 0) /* If enabled */ -#define SER_RS485_RTS_ON_SEND (1 << 1) /* Logical level for - RTS pin when - sending */ -#define SER_RS485_RTS_AFTER_SEND (1 << 2) /* Logical level for - RTS pin after sent*/ -#define SER_RS485_RX_DURING_TX (1 << 4) -#define SER_RS485_TERMINATE_BUS (1 << 5) /* Enable bus - termination - (if supported) */ - __u32 delay_rts_before_send; /* Delay before send (milliseconds) */ - __u32 delay_rts_after_send; /* Delay after send (milliseconds) */ - __u32 padding[5]; /* Memory is cheap, new structs - are a royal PITA .. */ + __u32 flags; +#define SER_RS485_ENABLED _BITUL(0) +#define SER_RS485_RTS_ON_SEND _BITUL(1) +#define SER_RS485_RTS_AFTER_SEND _BITUL(2) +/* Placeholder for bit 3: SER_RS485_RTS_BEFORE_SEND, which isn't used anymore */ +#define SER_RS485_RX_DURING_TX _BITUL(4) +#define SER_RS485_TERMINATE_BUS _BITUL(5) +#define SER_RS485_ADDRB _BITUL(6) +#define SER_RS485_ADDR_RECV _BITUL(7) +#define SER_RS485_ADDR_DEST _BITUL(8) +#define SER_RS485_MODE_RS422 _BITUL(9) + + __u32 delay_rts_before_send; + __u32 delay_rts_after_send; + + /* The fields below are defined by flags */ + union { + __u32 padding[5]; /* Memory is cheap, new structs are a pain */ + + struct { + __u8 addr_recv; + __u8 addr_dest; + __u8 padding0[2]; + __u32 padding1[4]; + }; + }; }; /* |