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Commit e942e577 authored by Jag Raman's avatar Jag Raman Committed by David S. Miller
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sparc64: vcc: Add break_ctl TTY operation 



Add handler to support TTY break_ctl operation

Signed-off-by: default avatarJagannathan Raman <jag.raman@oracle.com>
Reviewed-by: default avatarLiam Merwick <liam.merwick@oracle.com>
Reviewed-by: default avatarShannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aeee7deb

drivers/tty/vcc.c

+35 −0
Original line number Diff line number Diff line
@@ -960,6 +960,40 @@ static int vcc_chars_in_buffer(struct tty_struct *tty) 
	return num;

}



static int vcc_break_ctl(struct tty_struct *tty, int state)

{

	struct vcc_port *port;

	unsigned long flags;



	if (unlikely(!tty)) {

		pr_err("VCC: break_ctl: Invalid TTY handle\n");

		return -ENXIO;

	}



	port = vcc_get_ne(tty->index);

	if (unlikely(!port)) {

		pr_err("VCC: break_ctl: Failed to find VCC port\n");

		return -ENODEV;

	}



	/* Turn off break */

	if (state == 0) {

		vcc_put(port, false);

		return 0;

	}



	spin_lock_irqsave(&port->lock, flags);



	if (vcc_send_ctl(port, VCC_CTL_BREAK) < 0)

		vcc_kick_tx(port);



	spin_unlock_irqrestore(&port->lock, flags);



	vcc_put(port, false);



	return 0;

}



static const struct tty_operations vcc_ops = {

	.open			= vcc_open,

	.close			= vcc_close,
@@ -967,6 +1001,7 @@ static const struct tty_operations vcc_ops = { 
	.write			= vcc_write,

	.write_room		= vcc_write_room,

	.chars_in_buffer	= vcc_chars_in_buffer,

	.break_ctl		= vcc_break_ctl,

};



#define VCC_TTY_FLAGS   (TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_REAL_RAW)