Exemple #1
0
static int hsic_tty_open(struct tty_struct *tty, struct file *f)
{
    int res = 0;
    unsigned int n = tty->index;
    struct hsic_tty_info *info = &hsic_tty;
    unsigned port_num;

    pr_debug("%s: #%d\n", __func__, n);

    if (n >= MAX_HSIC_TTYS) {
        pr_err("%s: NODEV\n", __func__);
        return -ENODEV;
    }

    if (info->serial_state & ACM_CTRL_DSR & ACM_CTRL_DCD) {
        pr_err("%s: NODEV: DSR(%d), DCD(%d)\n", __func__,
                info->serial_state & ACM_CTRL_DSR ? 1 : 0,
                info->serial_state & ACM_CTRL_DCD ? 1 : 0);
        return -ENODEV;
    }

    port_num = info->client_port_num;

    mutex_lock(&hsic_tty_lock);
    tty->driver_data = info;

    if (info->open_counts++ == 0)
    {
        wake_lock_init(&info->wake_lock, WAKE_LOCK_SUSPEND, "hsic_tty");
    }

    if (info->open_count[n]++ == 0)
    {
        info->ttys[n] = tty;

        if (!info->tty || info->tty->index < n)
        {
            info->tty = tty;

#ifdef CONFIG_MODEM_SUPPORT
            if (n == 1)
            {
                if (info->port_handshake_bits & TIOCM_DTR)
                    hsic_tty_tiocmset(info->tty, 0, TIOCM_DTR);

                hsic_tty_tiocmset(info->tty, TIOCM_DTR, 0);
            }
#endif
        }
    }

    mutex_unlock(&hsic_tty_lock);

    pr_debug("%s: #%d, done\n", __func__, n);
    return res;
}
Exemple #2
0
static void hsic_tty_close(struct tty_struct *tty, struct file *f)
{
    struct hsic_tty_info *info = tty->driver_data;
    unsigned long flags;
    int n = tty->index;
    unsigned port_num;

    pr_debug("%s: #%d\n", __func__, n);

    if (info == 0)
        return;

    port_num = info->client_port_num;

    mutex_lock(&hsic_tty_lock);

    if (--info->open_count[n] == 0)
    {
#ifdef CONFIG_MODEM_SUPPORT
        if (n == 1)
            hsic_tty_tiocmset(info->tty, 0, TIOCM_DTR);
#endif

	if (n == 0)
	    info->ttys[n] = NULL;

        if (n-- > 0)
        {
            info->tty = info->ttys[n];
        }
    }

    if (--info->open_counts == 0)
    {
        spin_lock_irqsave(&info->reset_lock, flags);
        info->is_open = 0;
        spin_unlock_irqrestore(&info->reset_lock, flags);
        if (info->tty)
        {
            wake_lock_destroy(&info->wake_lock);
            info->tty = NULL;
        }
        tty->driver_data = 0;
        del_timer(&info->buf_req_timer);

#ifdef CONFIG_MODEM_SUPPORT
        info->port_handshake_bits = 0;
        info->serial_state = 0;
#endif
    }

    mutex_unlock(&hsic_tty_lock);
}