epca: Restore driver

Convert the driver to use the added hardware break support

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 29 deletions

diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 94dca7b082b2..9d9ae1ca2925 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -184,7 +184,7 @@ static void pc_stop(struct tty_struct *);
 static void pc_start(struct tty_struct *);
 static void pc_throttle(struct tty_struct *tty);
 static void pc_unthrottle(struct tty_struct *tty);
-static void digi_send_break(struct channel *ch, int msec);
+static int pc_send_break(struct tty_struct *tty, int msec);
 static void setup_empty_event(struct tty_struct *tty, struct channel *ch);
 static void epca_setup(char *, int *);
 
@@ -1040,6 +1040,7 @@ static const struct tty_operations pc_ops = {
 	.throttle = pc_throttle,
 	.unthrottle = pc_unthrottle,
 	.hangup = pc_hangup,
+	.break_ctl = pc_send_break
 };
 
 static int info_open(struct tty_struct *tty, struct file *filp)
@@ -1132,7 +1133,7 @@ static int __init pc_init(void)
 	pc_driver->init_termios.c_lflag = 0;
 	pc_driver->init_termios.c_ispeed = 9600;
 	pc_driver->init_termios.c_ospeed = 9600;
-	pc_driver->flags = TTY_DRIVER_REAL_RAW;
+	pc_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK;
 	tty_set_operations(pc_driver, &pc_ops);
 
 	pc_info->owner = THIS_MODULE;
@@ -2177,7 +2178,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file,
 					unsigned int cmd, unsigned long arg)
 {
 	digiflow_t dflow;
-	int retval;
 	unsigned long flags;
 	unsigned int mflag, mstat;
 	unsigned char startc, stopc;
@@ -2190,31 +2190,6 @@ static int pc_ioctl(struct tty_struct *tty, struct file *file,
 	else
 		return -EINVAL;
 	switch (cmd) {
-	case TCSBRK:	/* SVID version: non-zero arg --> no break */
-		retval = tty_check_change(tty);
-		if (retval)
-			return retval;
-		/* Setup an event to indicate when the transmit
-		   buffer empties */
-		spin_lock_irqsave(&epca_lock, flags);
-		setup_empty_event(tty, ch);
-		spin_unlock_irqrestore(&epca_lock, flags);
-		tty_wait_until_sent(tty, 0);
-		if (!arg)
-			digi_send_break(ch, HZ / 4);    /* 1/4 second */
-		return 0;
-	case TCSBRKP:	/* support for POSIX tcsendbreak() */
-		retval = tty_check_change(tty);
-		if (retval)
-			return retval;
-		/* Setup an event to indicate when the transmit buffer
-		   empties */
-		spin_lock_irqsave(&epca_lock, flags);
-		setup_empty_event(tty, ch);
-		spin_unlock_irqrestore(&epca_lock, flags);
-		tty_wait_until_sent(tty, 0);
-		digi_send_break(ch, arg ? arg*(HZ/10) : HZ/4);
-		return 0;
 	case TIOCMODG:
 		mflag = pc_tiocmget(tty, file);
 		if (put_user(mflag, (unsigned long __user *)argp))
@@ -2500,10 +2475,14 @@ static void pc_unthrottle(struct tty_struct *tty)
 	}
 }
 
-static void digi_send_break(struct channel *ch, int msec)
+static int pc_send_break(struct tty_struct *tty, int msec)
 {
+	struct channel *ch = (struct channel *) tty->driver_data;
 	unsigned long flags;
 
+	if (msec == -1)
+		return -EOPNOTSUPP;
+
 	spin_lock_irqsave(&epca_lock, flags);
 	globalwinon(ch);
 	/*
@@ -2516,6 +2495,7 @@ static void digi_send_break(struct channel *ch, int msec)
 	fepcmd(ch, SENDBREAK, msec, 0, 10, 0);
 	memoff(ch);
 	spin_unlock_irqrestore(&epca_lock, flags);
+	return 0;
 }
 
 /* Caller MUST hold the lock */