staging: comedi: ni_stc.h: add read/write callbacks to struct ni_private

The {read,write}[bwl] macros used to access the registers in the ni_atmio,
ni_mio_cs, and ni_pcimio drivers and the included ni_mio_common.c file all
rely on a local variable having a specific name. They also require some of
the ni_mio_common code to need a __maybe_unused tag on the devpriv local
variable.

Remove all the macros by converting them into private functions and storing
the callbacks in the private data.

Signed-off-by: H Hartley Sweeten <[email protected]>
Reviewed-by: Ian Abbott <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/staging/comedi/drivers/ni_atmio.c

@@ -272,12 +272,35 @@ static const int ni_irqpin[] = {
 
 /* How we access registers */
 
-#define ni_writel(a, b)		(outl((a), (b)+dev->iobase))
-#define ni_readl(a)		(inl((a)+dev->iobase))
-#define ni_writew(a, b)		(outw((a), (b)+dev->iobase))
-#define ni_readw(a)		(inw((a)+dev->iobase))
-#define ni_writeb(a, b)		(outb((a), (b)+dev->iobase))
-#define ni_readb(a)		(inb((a)+dev->iobase))
+static uint8_t ni_atmio_inb(struct comedi_device *dev, int reg)
+{
+	return inb(dev->iobase + reg);
+}
+
+static uint16_t ni_atmio_inw(struct comedi_device *dev, int reg)
+{
+	return inw(dev->iobase + reg);
+}
+
+static uint32_t ni_atmio_inl(struct comedi_device *dev, int reg)
+{
+	return inl(dev->iobase + reg);
+}
+
+static void ni_atmio_outb(struct comedi_device *dev, uint8_t val, int reg)
+{
+	outb(val, dev->iobase + reg);
+}
+
+static void ni_atmio_outw(struct comedi_device *dev, uint16_t val, int reg)
+{
+	outw(val, dev->iobase + reg);
+}
+
+static void ni_atmio_outl(struct comedi_device *dev, uint32_t val, int reg)
+{
+	outl(val, dev->iobase + reg);
+}
 
 /* How we access windowed registers */
 
@@ -292,10 +315,10 @@ static void ni_atmio_win_out(struct comedi_device *dev, uint16_t data, int addr)
 
 	spin_lock_irqsave(&devpriv->window_lock, flags);
 	if ((addr) < 8) {
-		ni_writew(data, addr * 2);
+		devpriv->writew(dev, data, addr * 2);
 	} else {
-		ni_writew(addr, Window_Address);
-		ni_writew(data, Window_Data);
+		devpriv->writew(dev, addr, Window_Address);
+		devpriv->writew(dev, data, Window_Data);
 	}
 	spin_unlock_irqrestore(&devpriv->window_lock, flags);
 }
@@ -308,10 +331,10 @@ static uint16_t ni_atmio_win_in(struct comedi_device *dev, int addr)
 
 	spin_lock_irqsave(&devpriv->window_lock, flags);
 	if (addr < 8) {
-		ret = ni_readw(addr * 2);
+		ret = devpriv->readw(dev, addr * 2);
 	} else {
-		ni_writew(addr, Window_Address);
-		ret = ni_readw(Window_Data);
+		devpriv->writew(dev, addr, Window_Address);
+		ret = devpriv->readw(dev, Window_Data);
 	}
 	spin_unlock_irqrestore(&devpriv->window_lock, flags);
 
@@ -405,10 +428,17 @@ static int ni_atmio_attach(struct comedi_device *dev,
 		return ret;
 	devpriv = dev->private;
 
-	devpriv->stc_writew = &ni_atmio_win_out;
-	devpriv->stc_readw = &ni_atmio_win_in;
-	devpriv->stc_writel = &win_out2;
-	devpriv->stc_readl = &win_in2;
+	devpriv->readb		= ni_atmio_inb;
+	devpriv->readw		= ni_atmio_inw;
+	devpriv->readl		= ni_atmio_inl;
+	devpriv->writeb		= ni_atmio_outb;
+	devpriv->writew		= ni_atmio_outw;
+	devpriv->writel		= ni_atmio_outl;
+
+	devpriv->stc_writew	= ni_atmio_win_out;
+	devpriv->stc_readw	= ni_atmio_win_in;
+	devpriv->stc_writel	= win_out2;
+	devpriv->stc_readl	= win_in2;
 
 	iobase = it->options[0];
 	irq = it->options[1];