staging: comedi: das800: remove forward declarations

Move the das800_cancel() and das800_interrupt() functions to remove
the need for the remaining forward declarations.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/das800.c

@@ -228,122 +228,6 @@ struct das800_private {
 	volatile int do_bits;	/* digital output bits */
 };
 
-static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
-
-static irqreturn_t das800_interrupt(int irq, void *d);
-static void enable_das800(struct comedi_device *dev);
-static void disable_das800(struct comedi_device *dev);
-
-/* interrupt service routine */
-static irqreturn_t das800_interrupt(int irq, void *d)
-{
-	short i;		/* loop index */
-	short dataPoint = 0;
-	struct comedi_device *dev = d;
-	const struct das800_board *thisboard = comedi_board(dev);
-	struct das800_private *devpriv = dev->private;
-	struct comedi_subdevice *s = dev->read_subdev;	/* analog input subdevice */
-	struct comedi_async *async;
-	int status;
-	unsigned long irq_flags;
-	static const int max_loops = 128;	/*  half-fifo size for cio-das802/16 */
-	/*  flags */
-	int fifo_empty = 0;
-	int fifo_overflow = 0;
-
-	status = inb(dev->iobase + DAS800_STATUS);
-	/* if interrupt was not generated by board or driver not attached, quit */
-	if (!(status & IRQ))
-		return IRQ_NONE;
-	if (!(dev->attached))
-		return IRQ_HANDLED;
-
-	/* wait until here to initialize async, since we will get null dereference
-	 * if interrupt occurs before driver is fully attached!
-	 */
-	async = s->async;
-
-	/*  if hardware conversions are not enabled, then quit */
-	spin_lock_irqsave(&dev->spinlock, irq_flags);
-	outb(CONTROL1, dev->iobase + DAS800_GAIN);	/* select base address + 7 to be STATUS2 register */
-	status = inb(dev->iobase + DAS800_STATUS2) & STATUS2_HCEN;
-	/* don't release spinlock yet since we want to make sure no one else disables hardware conversions */
-	if (status == 0) {
-		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
-		return IRQ_HANDLED;
-	}
-
-	/* loop while card's fifo is not empty (and limit to half fifo for cio-das802/16) */
-	for (i = 0; i < max_loops; i++) {
-		/* read 16 bits from dev->iobase and dev->iobase + 1 */
-		dataPoint = inb(dev->iobase + DAS800_LSB);
-		dataPoint += inb(dev->iobase + DAS800_MSB) << 8;
-		if (thisboard->resolution == 12) {
-			fifo_empty = dataPoint & FIFO_EMPTY;
-			fifo_overflow = dataPoint & FIFO_OVF;
-			if (fifo_overflow)
-				break;
-		} else {
-			fifo_empty = 0;	/*  cio-das802/16 has no fifo empty status bit */
-		}
-		if (fifo_empty)
-			break;
-		/* strip off extraneous bits for 12 bit cards */
-		if (thisboard->resolution == 12)
-			dataPoint = (dataPoint >> 4) & 0xfff;
-		/* if there are more data points to collect */
-		if (devpriv->count > 0 || devpriv->forever == 1) {
-			/* write data point to buffer */
-			cfc_write_to_buffer(s, dataPoint);
-			if (devpriv->count > 0)
-				devpriv->count--;
-		}
-	}
-	async->events |= COMEDI_CB_BLOCK;
-	/* check for fifo overflow */
-	if (thisboard->resolution == 12) {
-		fifo_overflow = dataPoint & FIFO_OVF;
-		/*  else cio-das802/16 */
-	} else {
-		fifo_overflow = inb(dev->iobase + DAS800_GAIN) & CIO_FFOV;
-	}
-	if (fifo_overflow) {
-		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
-		comedi_error(dev, "DAS800 FIFO overflow");
-		das800_cancel(dev, s);
-		async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
-		comedi_event(dev, s);
-		async->events = 0;
-		return IRQ_HANDLED;
-	}
-	if (devpriv->count > 0 || devpriv->forever == 1) {
-		/* Re-enable card's interrupt.
-		 * We already have spinlock, so indirect addressing is safe */
-		outb(CONTROL1, dev->iobase + DAS800_GAIN);	/* select dev->iobase + 2 to be control register 1 */
-		outb(CONTROL1_INTE | devpriv->do_bits,
-		     dev->iobase + DAS800_CONTROL1);
-		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
-		/* otherwise, stop taking data */
-	} else {
-		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
-		disable_das800(dev);	/* disable hardware triggered conversions */
-		async->events |= COMEDI_CB_EOA;
-	}
-	comedi_event(dev, s);
-	async->events = 0;
-	return IRQ_HANDLED;
-}
-
-static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
-{
-	struct das800_private *devpriv = dev->private;
-
-	devpriv->forever = 0;
-	devpriv->count = 0;
-	disable_das800(dev);
-	return 0;
-}
-
 /* enable_das800 makes the card start taking hardware triggered conversions */
 static void enable_das800(struct comedi_device *dev)
 {
@@ -387,6 +271,16 @@ static int das800_set_frequency(struct comedi_device *dev)
 	return 0;
 }
 
+static int das800_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
+{
+	struct das800_private *devpriv = dev->private;
+
+	devpriv->forever = 0;
+	devpriv->count = 0;
+	disable_das800(dev);
+	return 0;
+}
+
 static int das800_ai_do_cmdtest(struct comedi_device *dev,
 				struct comedi_subdevice *s,
 				struct comedi_cmd *cmd)
@@ -564,6 +458,105 @@ static int das800_ai_do_cmd(struct comedi_device *dev,
 	return 0;
 }
 
+static irqreturn_t das800_interrupt(int irq, void *d)
+{
+	short i;		/* loop index */
+	short dataPoint = 0;
+	struct comedi_device *dev = d;
+	const struct das800_board *thisboard = comedi_board(dev);
+	struct das800_private *devpriv = dev->private;
+	struct comedi_subdevice *s = dev->read_subdev;	/* analog input subdevice */
+	struct comedi_async *async;
+	int status;
+	unsigned long irq_flags;
+	static const int max_loops = 128;	/*  half-fifo size for cio-das802/16 */
+	/*  flags */
+	int fifo_empty = 0;
+	int fifo_overflow = 0;
+
+	status = inb(dev->iobase + DAS800_STATUS);
+	/* if interrupt was not generated by board or driver not attached, quit */
+	if (!(status & IRQ))
+		return IRQ_NONE;
+	if (!(dev->attached))
+		return IRQ_HANDLED;
+
+	/* wait until here to initialize async, since we will get null dereference
+	 * if interrupt occurs before driver is fully attached!
+	 */
+	async = s->async;
+
+	/*  if hardware conversions are not enabled, then quit */
+	spin_lock_irqsave(&dev->spinlock, irq_flags);
+	outb(CONTROL1, dev->iobase + DAS800_GAIN);	/* select base address + 7 to be STATUS2 register */
+	status = inb(dev->iobase + DAS800_STATUS2) & STATUS2_HCEN;
+	/* don't release spinlock yet since we want to make sure no one else disables hardware conversions */
+	if (status == 0) {
+		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+		return IRQ_HANDLED;
+	}
+
+	/* loop while card's fifo is not empty (and limit to half fifo for cio-das802/16) */
+	for (i = 0; i < max_loops; i++) {
+		/* read 16 bits from dev->iobase and dev->iobase + 1 */
+		dataPoint = inb(dev->iobase + DAS800_LSB);
+		dataPoint += inb(dev->iobase + DAS800_MSB) << 8;
+		if (thisboard->resolution == 12) {
+			fifo_empty = dataPoint & FIFO_EMPTY;
+			fifo_overflow = dataPoint & FIFO_OVF;
+			if (fifo_overflow)
+				break;
+		} else {
+			fifo_empty = 0;	/*  cio-das802/16 has no fifo empty status bit */
+		}
+		if (fifo_empty)
+			break;
+		/* strip off extraneous bits for 12 bit cards */
+		if (thisboard->resolution == 12)
+			dataPoint = (dataPoint >> 4) & 0xfff;
+		/* if there are more data points to collect */
+		if (devpriv->count > 0 || devpriv->forever == 1) {
+			/* write data point to buffer */
+			cfc_write_to_buffer(s, dataPoint);
+			if (devpriv->count > 0)
+				devpriv->count--;
+		}
+	}
+	async->events |= COMEDI_CB_BLOCK;
+	/* check for fifo overflow */
+	if (thisboard->resolution == 12) {
+		fifo_overflow = dataPoint & FIFO_OVF;
+		/*  else cio-das802/16 */
+	} else {
+		fifo_overflow = inb(dev->iobase + DAS800_GAIN) & CIO_FFOV;
+	}
+	if (fifo_overflow) {
+		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+		comedi_error(dev, "DAS800 FIFO overflow");
+		das800_cancel(dev, s);
+		async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
+		comedi_event(dev, s);
+		async->events = 0;
+		return IRQ_HANDLED;
+	}
+	if (devpriv->count > 0 || devpriv->forever == 1) {
+		/* Re-enable card's interrupt.
+		 * We already have spinlock, so indirect addressing is safe */
+		outb(CONTROL1, dev->iobase + DAS800_GAIN);	/* select dev->iobase + 2 to be control register 1 */
+		outb(CONTROL1_INTE | devpriv->do_bits,
+		     dev->iobase + DAS800_CONTROL1);
+		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+		/* otherwise, stop taking data */
+	} else {
+		spin_unlock_irqrestore(&dev->spinlock, irq_flags);
+		disable_das800(dev);	/* disable hardware triggered conversions */
+		async->events |= COMEDI_CB_EOA;
+	}
+	comedi_event(dev, s);
+	async->events = 0;
+	return IRQ_HANDLED;
+}
+
 static int das800_ai_rinsn(struct comedi_device *dev,
 			   struct comedi_subdevice *s, struct comedi_insn *insn,
 			   unsigned int *data)