Root/include/asm-generic/termios.h

1#ifndef _ASM_GENERIC_TERMIOS_H
2#define _ASM_GENERIC_TERMIOS_H
3/*
4 * Most architectures have straight copies of the x86 code, with
5 * varying levels of bug fixes on top. Usually it's a good idea
6 * to use this generic version instead, but be careful to avoid
7 * ABI changes.
8 * New architectures should not provide their own version.
9 */
10
11#include <asm/termbits.h>
12#include <asm/ioctls.h>
13
14struct winsize {
15    unsigned short ws_row;
16    unsigned short ws_col;
17    unsigned short ws_xpixel;
18    unsigned short ws_ypixel;
19};
20
21#define NCC 8
22struct termio {
23    unsigned short c_iflag; /* input mode flags */
24    unsigned short c_oflag; /* output mode flags */
25    unsigned short c_cflag; /* control mode flags */
26    unsigned short c_lflag; /* local mode flags */
27    unsigned char c_line; /* line discipline */
28    unsigned char c_cc[NCC]; /* control characters */
29};
30
31/* modem lines */
32#define TIOCM_LE 0x001
33#define TIOCM_DTR 0x002
34#define TIOCM_RTS 0x004
35#define TIOCM_ST 0x008
36#define TIOCM_SR 0x010
37#define TIOCM_CTS 0x020
38#define TIOCM_CAR 0x040
39#define TIOCM_RNG 0x080
40#define TIOCM_DSR 0x100
41#define TIOCM_CD TIOCM_CAR
42#define TIOCM_RI TIOCM_RNG
43#define TIOCM_OUT1 0x2000
44#define TIOCM_OUT2 0x4000
45#define TIOCM_LOOP 0x8000
46
47/* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
48
49#ifdef __KERNEL__
50
51#include <asm/uaccess.h>
52
53/* intr=^C quit=^\ erase=del kill=^U
54    eof=^D vtime=\0 vmin=\1 sxtc=\0
55    start=^Q stop=^S susp=^Z eol=\0
56    reprint=^R discard=^U werase=^W lnext=^V
57    eol2=\0
58*/
59#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
60
61/*
62 * Translate a "termio" structure into a "termios". Ugh.
63 */
64static inline int user_termio_to_kernel_termios(struct ktermios *termios,
65                        const struct termio __user *termio)
66{
67    unsigned short tmp;
68
69    if (get_user(tmp, &termio->c_iflag) < 0)
70        goto fault;
71    termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
72
73    if (get_user(tmp, &termio->c_oflag) < 0)
74        goto fault;
75    termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
76
77    if (get_user(tmp, &termio->c_cflag) < 0)
78        goto fault;
79    termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
80
81    if (get_user(tmp, &termio->c_lflag) < 0)
82        goto fault;
83    termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
84
85    if (get_user(termios->c_line, &termio->c_line) < 0)
86        goto fault;
87
88    if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
89        goto fault;
90
91    return 0;
92
93 fault:
94    return -EFAULT;
95}
96
97/*
98 * Translate a "termios" structure into a "termio". Ugh.
99 */
100static inline int kernel_termios_to_user_termio(struct termio __user *termio,
101                        struct ktermios *termios)
102{
103    if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
104        put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
105        put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
106        put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
107        put_user(termios->c_line, &termio->c_line) < 0 ||
108        copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
109        return -EFAULT;
110
111    return 0;
112}
113
114#ifdef TCGETS2
115static inline int user_termios_to_kernel_termios(struct ktermios *k,
116                         struct termios2 __user *u)
117{
118    return copy_from_user(k, u, sizeof(struct termios2));
119}
120
121static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
122                         struct ktermios *k)
123{
124    return copy_to_user(u, k, sizeof(struct termios2));
125}
126
127static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
128                           struct termios __user *u)
129{
130    return copy_from_user(k, u, sizeof(struct termios));
131}
132
133static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
134                           struct ktermios *k)
135{
136    return copy_to_user(u, k, sizeof(struct termios));
137}
138#else /* TCGETS2 */
139static inline int user_termios_to_kernel_termios(struct ktermios *k,
140                         struct termios __user *u)
141{
142    return copy_from_user(k, u, sizeof(struct termios));
143}
144
145static inline int kernel_termios_to_user_termios(struct termios __user *u,
146                         struct ktermios *k)
147{
148    return copy_to_user(u, k, sizeof(struct termios));
149}
150#endif /* TCGETS2 */
151
152#endif /* __KERNEL__ */
153
154#endif /* _ASM_GENERIC_TERMIOS_H */
155

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