110 lines
2.4 KiB
C
110 lines
2.4 KiB
C
#include <stddef.h>
|
|
#include <rtthread.h>
|
|
#include <tty.h>
|
|
#if defined(RT_USING_POSIX_DEVIO)
|
|
#include <termios.h>
|
|
#endif
|
|
|
|
#define DBG_TAG "TTY_IOCTL"
|
|
#ifdef RT_TTY_DEBUG
|
|
#define DBG_LVL DBG_LOG
|
|
#else
|
|
#define DBG_LVL DBG_INFO
|
|
#endif /* RT_TTY_DEBUG */
|
|
#include <rtdbg.h>
|
|
|
|
/*
|
|
* Internal flag options for termios setting behavior
|
|
*/
|
|
#define TERMIOS_FLUSH 1
|
|
#define TERMIOS_WAIT 2
|
|
#define TERMIOS_TERMIO 4
|
|
#define TERMIOS_OLD 8
|
|
|
|
/**
|
|
* set_termios - set termios values for a tty
|
|
* @tty: terminal device
|
|
* @arg: user data
|
|
* @opt: option information
|
|
*
|
|
* Helper function to prepare termios data and run necessary other
|
|
* functions before using tty_set_termios to do the actual changes.
|
|
*
|
|
* Locking:
|
|
* Called functions take ldisc and termios_rwsem locks
|
|
*/
|
|
|
|
static int set_termios(struct tty_struct *tty, void *arg, int opt)
|
|
{
|
|
struct termios old_termios;
|
|
struct tty_ldisc *ld = RT_NULL;
|
|
struct termios *new_termios = (struct termios *)arg;
|
|
int level = 0;
|
|
int retval = tty_check_change(tty);
|
|
|
|
if (retval)
|
|
{
|
|
return retval;
|
|
}
|
|
|
|
rt_memcpy(&old_termios, &(tty->init_termios), sizeof(struct termios));
|
|
level = rt_hw_interrupt_disable();
|
|
tty->init_termios = *new_termios;
|
|
rt_hw_interrupt_enable(level);
|
|
ld = tty->ldisc;
|
|
if (ld != NULL)
|
|
{
|
|
if (ld->ops->set_termios)
|
|
{
|
|
ld->ops->set_termios(tty, &old_termios);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int n_tty_ioctl_extend(struct tty_struct *tty, int cmd, void *args)
|
|
{
|
|
int ret = 0;
|
|
void *p = (void *)args;
|
|
struct tty_struct *real_tty = RT_NULL;
|
|
|
|
if (tty->type == TTY_DRIVER_TYPE_PTY && tty->subtype == PTY_TYPE_MASTER)
|
|
{
|
|
real_tty = tty->other_struct;
|
|
}
|
|
else
|
|
{
|
|
real_tty = tty;
|
|
}
|
|
|
|
switch(cmd)
|
|
{
|
|
case TCGETS:
|
|
{
|
|
struct termios *tio = (struct termios *)p;
|
|
if (tio == RT_NULL)
|
|
{
|
|
return -RT_EINVAL;
|
|
}
|
|
|
|
rt_memcpy(tio, &real_tty->init_termios, sizeof(real_tty->init_termios));
|
|
return ret;
|
|
}
|
|
case TCSETSF:
|
|
{
|
|
return set_termios(real_tty, p, TERMIOS_FLUSH | TERMIOS_WAIT | TERMIOS_OLD);
|
|
}
|
|
case TCSETSW:
|
|
{
|
|
return set_termios(real_tty, p, TERMIOS_WAIT | TERMIOS_OLD);
|
|
}
|
|
case TCSETS:
|
|
{
|
|
return set_termios(real_tty, p, TERMIOS_OLD);
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|