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
  14 struct 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
  22 struct 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  */
  64 static 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  */
 100 static 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
 115 static 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
 121 static 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
 127 static 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
 133 static 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 */
 139 static 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
 145 static 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 */