1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _LINUX_TTY_FLAGS_H
3 #define _LINUX_TTY_FLAGS_H
4 
5 /*
6  * Definitions for async_struct (and serial_struct) flags field also
7  * shared by the tty_port flags structures.
8  *
9  * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
10  *
11  * Bits [0..ASYNCB_LAST_USER] are userspace defined/visible/changeable
12  * [x] in the bit comments indicates the flag is defunct and no longer used.
13  */
14 #define ASYNCB_HUP_NOTIFY	 0 /* Notify getty on hangups and closes
15 				    * on the callout port */
16 #define ASYNCB_FOURPORT		 1 /* Set OU1, OUT2 per AST Fourport settings */
17 #define ASYNCB_SAK		 2 /* Secure Attention Key (Orange book) */
18 #define ASYNCB_SPLIT_TERMIOS	 3 /* [x] Separate termios for dialin/callout */
19 #define ASYNCB_SPD_HI		 4 /* Use 57600 instead of 38400 bps */
20 #define ASYNCB_SPD_VHI		 5 /* Use 115200 instead of 38400 bps */
21 #define ASYNCB_SKIP_TEST	 6 /* Skip UART test during autoconfiguration */
22 #define ASYNCB_AUTO_IRQ		 7 /* Do automatic IRQ during
23 				    * autoconfiguration */
24 #define ASYNCB_SESSION_LOCKOUT	 8 /* [x] Lock out cua opens based on session */
25 #define ASYNCB_PGRP_LOCKOUT	 9 /* [x] Lock out cua opens based on pgrp */
26 #define ASYNCB_CALLOUT_NOHUP	10 /* [x] Don't do hangups for cua device */
27 #define ASYNCB_HARDPPS_CD	11 /* Call hardpps when CD goes high  */
28 #define ASYNCB_SPD_SHI		12 /* Use 230400 instead of 38400 bps */
29 #define ASYNCB_LOW_LATENCY	13 /* Request low latency behaviour */
30 #define ASYNCB_BUGGY_UART	14 /* This is a buggy UART, skip some safety
31 				    * checks.  Note: can be dangerous! */
32 #define ASYNCB_AUTOPROBE	15 /* [x] Port was autoprobed by PCI/PNP code */
33 #define ASYNCB_MAGIC_MULTIPLIER	16 /* Use special CLK or divisor */
34 #define ASYNCB_LAST_USER	16
35 
36 /*
37  * Internal flags used only by kernel (read-only)
38  *
39  * WARNING: These flags are no longer used and have been superceded by the
40  *	    TTY_PORT_ flags in the iflags field (and not userspace-visible)
41  */
42 #ifndef _KERNEL_
43 #define ASYNCB_INITIALIZED	31 /* Serial port was initialized */
44 #define ASYNCB_SUSPENDED	30 /* Serial port is suspended */
45 #define ASYNCB_NORMAL_ACTIVE	29 /* Normal device is active */
46 #define ASYNCB_BOOT_AUTOCONF	28 /* Autoconfigure port on bootup */
47 #define ASYNCB_CLOSING		27 /* Serial port is closing */
48 #define ASYNCB_CTS_FLOW		26 /* Do CTS flow control */
49 #define ASYNCB_CHECK_CD		25 /* i.e., CLOCAL */
50 #define ASYNCB_SHARE_IRQ	24 /* for multifunction cards, no longer used */
51 #define ASYNCB_CONS_FLOW	23 /* flow control for console  */
52 #define ASYNCB_FIRST_KERNEL	22
53 #endif
54 
55 /* Masks */
56 #define ASYNC_HUP_NOTIFY	(1U << ASYNCB_HUP_NOTIFY)
57 #define ASYNC_SUSPENDED		(1U << ASYNCB_SUSPENDED)
58 #define ASYNC_FOURPORT		(1U << ASYNCB_FOURPORT)
59 #define ASYNC_SAK		(1U << ASYNCB_SAK)
60 #define ASYNC_SPLIT_TERMIOS	(1U << ASYNCB_SPLIT_TERMIOS)
61 #define ASYNC_SPD_HI		(1U << ASYNCB_SPD_HI)
62 #define ASYNC_SPD_VHI		(1U << ASYNCB_SPD_VHI)
63 #define ASYNC_SKIP_TEST		(1U << ASYNCB_SKIP_TEST)
64 #define ASYNC_AUTO_IRQ		(1U << ASYNCB_AUTO_IRQ)
65 #define ASYNC_SESSION_LOCKOUT	(1U << ASYNCB_SESSION_LOCKOUT)
66 #define ASYNC_PGRP_LOCKOUT	(1U << ASYNCB_PGRP_LOCKOUT)
67 #define ASYNC_CALLOUT_NOHUP	(1U << ASYNCB_CALLOUT_NOHUP)
68 #define ASYNC_HARDPPS_CD	(1U << ASYNCB_HARDPPS_CD)
69 #define ASYNC_SPD_SHI		(1U << ASYNCB_SPD_SHI)
70 #define ASYNC_LOW_LATENCY	(1U << ASYNCB_LOW_LATENCY)
71 #define ASYNC_BUGGY_UART	(1U << ASYNCB_BUGGY_UART)
72 #define ASYNC_AUTOPROBE		(1U << ASYNCB_AUTOPROBE)
73 #define ASYNC_MAGIC_MULTIPLIER	(1U << ASYNCB_MAGIC_MULTIPLIER)
74 
75 #define ASYNC_FLAGS		((1U << (ASYNCB_LAST_USER + 1)) - 1)
76 #define ASYNC_DEPRECATED	(ASYNC_SESSION_LOCKOUT | ASYNC_PGRP_LOCKOUT | \
77 		ASYNC_CALLOUT_NOHUP | ASYNC_AUTOPROBE)
78 #define ASYNC_USR_MASK		(ASYNC_SPD_MASK|ASYNC_CALLOUT_NOHUP| \
79 		ASYNC_LOW_LATENCY)
80 #define ASYNC_SPD_CUST		(ASYNC_SPD_HI|ASYNC_SPD_VHI)
81 #define ASYNC_SPD_WARP		(ASYNC_SPD_HI|ASYNC_SPD_SHI)
82 #define ASYNC_SPD_MASK		(ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
83 
84 #ifndef _KERNEL_
85 /* These flags are no longer used (and were always masked from userspace) */
86 #define ASYNC_INITIALIZED	(1U << ASYNCB_INITIALIZED)
87 #define ASYNC_NORMAL_ACTIVE	(1U << ASYNCB_NORMAL_ACTIVE)
88 #define ASYNC_BOOT_AUTOCONF	(1U << ASYNCB_BOOT_AUTOCONF)
89 #define ASYNC_CLOSING		(1U << ASYNCB_CLOSING)
90 #define ASYNC_CTS_FLOW		(1U << ASYNCB_CTS_FLOW)
91 #define ASYNC_CHECK_CD		(1U << ASYNCB_CHECK_CD)
92 #define ASYNC_SHARE_IRQ		(1U << ASYNCB_SHARE_IRQ)
93 #define ASYNC_CONS_FLOW		(1U << ASYNCB_CONS_FLOW)
94 #define ASYNC_INTERNAL_FLAGS	(~((1U << ASYNCB_FIRST_KERNEL) - 1))
95 #endif
96 
97 #endif
98