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 */