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 */