Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  1 #ifndef _ASM_X86_TERMIOS_H
  2 #define _ASM_X86_TERMIOS_H
  3 
  4 #include <asm/termbits.h>
  5 #include <asm/ioctls.h>
  6 
  7 struct winsize {
  8         unsigned short ws_row;
  9         unsigned short ws_col;
 10         unsigned short ws_xpixel;
 11         unsigned short ws_ypixel;
 12 };
 13 
 14 #define NCC 8
 15 struct termio {
 16         unsigned short c_iflag;         /* input mode flags */
 17         unsigned short c_oflag;         /* output mode flags */
 18         unsigned short c_cflag;         /* control mode flags */
 19         unsigned short c_lflag;         /* local mode flags */
 20         unsigned char c_line;           /* line discipline */
 21         unsigned char c_cc[NCC];        /* control characters */
 22 };
 23 
 24 /* modem lines */
 25 #define TIOCM_LE        0x001
 26 #define TIOCM_DTR       0x002
 27 #define TIOCM_RTS       0x004
 28 #define TIOCM_ST        0x008
 29 #define TIOCM_SR        0x010
 30 #define TIOCM_CTS       0x020
 31 #define TIOCM_CAR       0x040
 32 #define TIOCM_RNG       0x080
 33 #define TIOCM_DSR       0x100
 34 #define TIOCM_CD        TIOCM_CAR
 35 #define TIOCM_RI        TIOCM_RNG
 36 #define TIOCM_OUT1      0x2000
 37 #define TIOCM_OUT2      0x4000
 38 #define TIOCM_LOOP      0x8000
 39 
 40 /* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
 41 
 42 #ifdef __KERNEL__
 43 
 44 #include <asm/uaccess.h>
 45 
 46 /*      intr=^C         quit=^\         erase=del       kill=^U
 47         eof=^D          vtime=\0        vmin=\1         sxtc=\0
 48         start=^Q        stop=^S         susp=^Z         eol=\0
 49         reprint=^R      discard=^U      werase=^W       lnext=^V
 50         eol2=\0
 51 */
 52 #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
 53 
 54 /*
 55  * Translate a "termio" structure into a "termios". Ugh.
 56  */
 57 #define SET_LOW_TERMIOS_BITS(termios, termio, x) { \
 58         unsigned short __tmp; \
 59         get_user(__tmp,&(termio)->x); \
 60         *(unsigned short *) &(termios)->x = __tmp; \
 61 }
 62 
 63 static inline int user_termio_to_kernel_termios(struct ktermios *termios,
 64                                                 struct termio __user *termio)
 65 {
 66         SET_LOW_TERMIOS_BITS(termios, termio, c_iflag);
 67         SET_LOW_TERMIOS_BITS(termios, termio, c_oflag);
 68         SET_LOW_TERMIOS_BITS(termios, termio, c_cflag);
 69         SET_LOW_TERMIOS_BITS(termios, termio, c_lflag);
 70         return copy_from_user(termios->c_cc, termio->c_cc, NCC);
 71 }
 72 
 73 /*
 74  * Translate a "termios" structure into a "termio". Ugh.
 75  */
 76 static inline int kernel_termios_to_user_termio(struct termio __user *termio,
 77                                             struct ktermios *termios)
 78 {
 79         put_user((termios)->c_iflag, &(termio)->c_iflag);
 80         put_user((termios)->c_oflag, &(termio)->c_oflag);
 81         put_user((termios)->c_cflag, &(termio)->c_cflag);
 82         put_user((termios)->c_lflag, &(termio)->c_lflag);
 83         put_user((termios)->c_line,  &(termio)->c_line);
 84         return copy_to_user((termio)->c_cc, (termios)->c_cc, NCC);
 85 }
 86 
 87 static inline int user_termios_to_kernel_termios(struct ktermios *k,
 88                                                  struct termios2 __user *u)
 89 {
 90         return copy_from_user(k, u, sizeof(struct termios2));
 91 }
 92 
 93 static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
 94                                                  struct ktermios *k)
 95 {
 96         return copy_to_user(u, k, sizeof(struct termios2));
 97 }
 98 
 99 static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
100                                                    struct termios __user *u)
101 {
102         return copy_from_user(k, u, sizeof(struct termios));
103 }
104 
105 static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
106                                                    struct ktermios *k)
107 {
108         return copy_to_user(u, k, sizeof(struct termios));
109 }
110 
111 #endif  /* __KERNEL__ */
112 
113 #endif /* _ASM_X86_TERMIOS_H */
114 
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