1#ifndef _ASM_GENERIC_TERMIOS_H
2#define _ASM_GENERIC_TERMIOS_H
3
4
5#include <asm/uaccess.h>
6#include <uapi/asm-generic/termios.h>
7
8/*	intr=^C		quit=^\		erase=del	kill=^U
9	eof=^D		vtime=\0	vmin=\1		sxtc=\0
10	start=^Q	stop=^S		susp=^Z		eol=\0
11	reprint=^R	discard=^U	werase=^W	lnext=^V
12	eol2=\0
13*/
14#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
15
16/*
17 * Translate a "termio" structure into a "termios". Ugh.
18 */
19static inline int user_termio_to_kernel_termios(struct ktermios *termios,
20						const struct termio __user *termio)
21{
22	unsigned short tmp;
23
24	if (get_user(tmp, &termio->c_iflag) < 0)
25		goto fault;
26	termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
27
28	if (get_user(tmp, &termio->c_oflag) < 0)
29		goto fault;
30	termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
31
32	if (get_user(tmp, &termio->c_cflag) < 0)
33		goto fault;
34	termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
35
36	if (get_user(tmp, &termio->c_lflag) < 0)
37		goto fault;
38	termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
39
40	if (get_user(termios->c_line, &termio->c_line) < 0)
41		goto fault;
42
43	if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
44		goto fault;
45
46	return 0;
47
48 fault:
49	return -EFAULT;
50}
51
52/*
53 * Translate a "termios" structure into a "termio". Ugh.
54 */
55static inline int kernel_termios_to_user_termio(struct termio __user *termio,
56						struct ktermios *termios)
57{
58	if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
59	    put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
60	    put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
61	    put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
62	    put_user(termios->c_line,  &termio->c_line) < 0 ||
63	    copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
64		return -EFAULT;
65
66	return 0;
67}
68
69#ifdef TCGETS2
70static inline int user_termios_to_kernel_termios(struct ktermios *k,
71						 struct termios2 __user *u)
72{
73	return copy_from_user(k, u, sizeof(struct termios2));
74}
75
76static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
77						 struct ktermios *k)
78{
79	return copy_to_user(u, k, sizeof(struct termios2));
80}
81
82static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
83						   struct termios __user *u)
84{
85	return copy_from_user(k, u, sizeof(struct termios));
86}
87
88static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
89						   struct ktermios *k)
90{
91	return copy_to_user(u, k, sizeof(struct termios));
92}
93#else /* TCGETS2 */
94static inline int user_termios_to_kernel_termios(struct ktermios *k,
95						 struct termios __user *u)
96{
97	return copy_from_user(k, u, sizeof(struct termios));
98}
99
100static inline int kernel_termios_to_user_termios(struct termios __user *u,
101						 struct ktermios *k)
102{
103	return copy_to_user(u, k, sizeof(struct termios));
104}
105#endif /* TCGETS2 */
106
107#endif /* _ASM_GENERIC_TERMIOS_H */
108