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4f768e9477
Add support for RS-485 multipoint addressing using 9th bit [*]. The addressing mode is configured through ->rs485_config(). ADDRB in termios indicates 9th bit addressing mode is enabled. In this mode, 9th bit is used to indicate an address (byte) within the communication line. ADDRB can only be enabled/disabled through ->rs485_config() that is also responsible for setting the destination and receiver (filter) addresses. Add traps to detect unwanted changes to struct serial_rs485 layout using static_assert(). [*] Technically, RS485 is just an electronic spec and does not itself specify the 9th bit addressing mode but 9th bit seems at least "semi-standard" way to do addressing with RS485. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20220624204210.11112-6-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef __ASM_GENERIC_TERMBITS_COMMON_H
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#define __ASM_GENERIC_TERMBITS_COMMON_H
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typedef unsigned char cc_t;
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typedef unsigned int speed_t;
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/* c_iflag bits */
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#define IGNBRK 0x001 /* Ignore break condition */
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#define BRKINT 0x002 /* Signal interrupt on break */
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#define IGNPAR 0x004 /* Ignore characters with parity errors */
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#define PARMRK 0x008 /* Mark parity and framing errors */
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#define INPCK 0x010 /* Enable input parity check */
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#define ISTRIP 0x020 /* Strip 8th bit off characters */
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#define INLCR 0x040 /* Map NL to CR on input */
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#define IGNCR 0x080 /* Ignore CR */
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#define ICRNL 0x100 /* Map CR to NL on input */
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#define IXANY 0x800 /* Any character will restart after stop */
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/* c_oflag bits */
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#define OPOST 0x01 /* Perform output processing */
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#define OCRNL 0x08
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#define ONOCR 0x10
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#define ONLRET 0x20
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#define OFILL 0x40
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#define OFDEL 0x80
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/* c_cflag bit meaning */
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/* Common CBAUD rates */
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#define B0 0x00000000 /* hang up */
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#define B50 0x00000001
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#define B75 0x00000002
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#define B110 0x00000003
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#define B134 0x00000004
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#define B150 0x00000005
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#define B200 0x00000006
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#define B300 0x00000007
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#define B600 0x00000008
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#define B1200 0x00000009
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#define B1800 0x0000000a
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#define B2400 0x0000000b
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#define B4800 0x0000000c
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#define B9600 0x0000000d
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#define B19200 0x0000000e
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#define B38400 0x0000000f
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#define EXTA B19200
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#define EXTB B38400
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#define ADDRB 0x20000000 /* address bit */
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#define CMSPAR 0x40000000 /* mark or space (stick) parity */
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#define CRTSCTS 0x80000000 /* flow control */
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#define IBSHIFT 16 /* Shift from CBAUD to CIBAUD */
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/* tcflow() ACTION argument and TCXONC use these */
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#define TCOOFF 0 /* Suspend output */
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#define TCOON 1 /* Restart suspended output */
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#define TCIOFF 2 /* Send a STOP character */
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#define TCION 3 /* Send a START character */
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/* tcflush() QUEUE_SELECTOR argument and TCFLSH use these */
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#define TCIFLUSH 0 /* Discard data received but not yet read */
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#define TCOFLUSH 1 /* Discard data written but not yet sent */
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#define TCIOFLUSH 2 /* Discard all pending data */
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#endif /* __ASM_GENERIC_TERMBITS_COMMON_H */
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