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Add scancode reading capability to TTY

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This commit is contained in:
Erik van der Kouwe
2010-04-15 06:55:42 +00:00
parent 32f43d7571
commit 7de730afe4
7 changed files with 64 additions and 16 deletions
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drivers/tty/tty.c
+29 -10
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@@ -1036,10 +1036,26 @@ register tty_t *tp; /* pointer to terminal to read from */
/*===========================================================================*
* in_process *
*===========================================================================*/
PUBLIC int in_process(tp, buf, count)
PRIVATE void in_process_send_byte(tp, ch)
tty_t *tp; /* terminal on which character has arrived */
int ch; /* input character */
{
/* Save the character in the input queue. */
*tp->tty_inhead++ = ch;
if (tp->tty_inhead == bufend(tp->tty_inbuf))
tp->tty_inhead = tp->tty_inbuf;
tp->tty_incount++;
if (ch & IN_EOT) tp->tty_eotct++;
/* Try to finish input if the queue threatens to overflow. */
if (tp->tty_incount == buflen(tp->tty_inbuf)) in_transfer(tp);
}
PUBLIC int in_process(tp, buf, count, scode)
register tty_t *tp; /* terminal on which character has arrived */
char *buf; /* buffer with input characters */
int count; /* number of input characters */
int scode; /* scan code */
{
/* Characters have just been typed in. Process, save, and echo them. Return
* the number of characters processed.
@@ -1048,6 +1064,11 @@ int count; /* number of input characters */
int ch, sig, ct;
int timeset = FALSE;
/* Send scancode if requested */
if (tp->tty_termios.c_iflag & SCANCODES) {
in_process_send_byte(tp, (scode & BYTE) | IN_EOT);
}
for (ct = 0; ct < count; ct++) {
/* Take one character. */
ch = *buf++ & BYTE;
@@ -1180,15 +1201,10 @@ int count; /* number of input characters */
/* Perform the intricate function of echoing. */
if (tp->tty_termios.c_lflag & (ECHO|ECHONL)) ch = tty_echo(tp, ch);
/* Save the character in the input queue. */
*tp->tty_inhead++ = ch;
if (tp->tty_inhead == bufend(tp->tty_inbuf))
tp->tty_inhead = tp->tty_inbuf;
tp->tty_incount++;
if (ch & IN_EOT) tp->tty_eotct++;
/* Try to finish input if the queue threatens to overflow. */
if (tp->tty_incount == buflen(tp->tty_inbuf)) in_transfer(tp);
/* Send processed byte of input unless scancodes sent instead */
if (!(tp->tty_termios.c_iflag & SCANCODES)) {
in_process_send_byte(tp, ch);
}
}
return ct;
}
@@ -1502,6 +1518,9 @@ tty_t *tp;
/* Setting the output speed to zero hangs up the phone. */
if (tp->tty_termios.c_ospeed == B0) sigchar(tp, SIGHUP, 1);
/* SCANCODES is supported only for the console */
if (!isconsole(tp)) tp->tty_termios.c_iflag &= ~SCANCODES;
/* Set new line speed, character size, etc at the device level. */
(*tp->tty_ioctl)(tp, 0);
}