staging: comedi: addi_apci_3120: tidy up APCI3120_ENABLE_TIMER[012]

For aesthetics, replace these defines with a macro that returns the
correct bit needed to set the gate bit to enable a timer.
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/addi-data/hwdrv_apci3120.c

@@ -101,7 +101,6 @@ This program is distributed in the hope that it will be useful, but WITHOUT ANY
 #define APCI3120_10_GAIN		0x30
 #define APCI3120_SEQ_RAM_ADDRESS	0x06
 #define APCI3120_RESET_FIFO		0x0c
-#define APCI3120_ENABLE_TIMER0		0x1000
 
 /* nWrMode_Select */
 #define APCI3120_ENABLE_SCAN		0x8
@@ -130,7 +129,6 @@ This program is distributed in the hope that it will be useful, but WITHOUT ANY
 #define APCI3120_WATCHDOG		2
 #define APCI3120_TIMER_DISABLE		0
 #define APCI3120_TIMER_ENABLE		1
-#define APCI3120_ENABLE_TIMER2		0x4000
 #define APCI3120_ENABLE_TIMER_INT	0x04
 #define APCI3120_DISABLE_TIMER_INT	(~APCI3120_ENABLE_TIMER_INT)
 #define APCI3120_WRITE_MODE_SELECT	0x0e
@@ -143,9 +141,6 @@ This program is distributed in the hope that it will be useful, but WITHOUT ANY
 #define APCI3120_ENABLE_TIMER_COUNTER	0x10
 #define APCI3120_DISABLE_TIMER_COUNTER	(~APCI3120_ENABLE_TIMER_COUNTER)
 #define APCI3120_FC_TIMER		0x1000
-#define APCI3120_ENABLE_TIMER0		0x1000
-#define APCI3120_ENABLE_TIMER1		0x2000
-#define APCI3120_ENABLE_TIMER2		0x4000
 
 #define APCI3120_TIMER2_SELECT_EOS	0xc0
 #define APCI3120_COUNTER		3
@@ -338,7 +333,7 @@ static int apci3120_ai_insn_read(struct comedi_device *dev,
 			     dev->iobase + APCI3120_WRITE_MODE_SELECT);
 
 			/*  Sets gate 0 */
-			devpriv->ctrl |= APCI3120_ENABLE_TIMER0;
+			devpriv->ctrl |= APCI3120_CTRL_GATE(0);
 			outw(devpriv->ctrl, dev->iobase + APCI3120_WR_ADDRESS);
 
 			/* Set the conversion time */
@@ -411,7 +406,7 @@ static int apci3120_ai_insn_read(struct comedi_device *dev,
 			inw(dev->iobase + APCI3120_RD_STATUS);
 
 			/* Sets gate 0 */
-			devpriv->ctrl |= APCI3120_ENABLE_TIMER0;
+			devpriv->ctrl |= APCI3120_CTRL_GATE(0);
 			outw(devpriv->ctrl, dev->iobase + APCI3120_WR_ADDRESS);
 
 			/* Start conversion */
@@ -903,20 +898,20 @@ static int apci3120_cyclic_ai(int mode,
 	if (devpriv->us_UseDma == APCI3120_DISABLE &&
 	    cmd->stop_src == TRIG_COUNT) {
 		/*  set gate 2   to start conversion */
-		devpriv->ctrl |= APCI3120_ENABLE_TIMER2;
+		devpriv->ctrl |= APCI3120_CTRL_GATE(2);
 		outw(devpriv->ctrl, dev->iobase + APCI3120_WR_ADDRESS);
 	}
 
 	switch (mode) {
 	case 1:
 		/*  set gate 0   to start conversion */
-		devpriv->ctrl |= APCI3120_ENABLE_TIMER0;
+		devpriv->ctrl |= APCI3120_CTRL_GATE(0);
 		outw(devpriv->ctrl, dev->iobase + APCI3120_WR_ADDRESS);
 		break;
 	case 2:
 		/*  set  gate 0 and gate 1 */
-		devpriv->ctrl |= APCI3120_ENABLE_TIMER1 |
-				 APCI3120_ENABLE_TIMER0;
+		devpriv->ctrl |= APCI3120_CTRL_GATE(1) |
+				 APCI3120_CTRL_GATE(0);
 		outw(devpriv->ctrl, dev->iobase + APCI3120_WR_ADDRESS);
 		break;
 
@@ -1251,8 +1246,8 @@ static irqreturn_t apci3120_interrupt(int irq, void *d)
 		} else {
 			/* Stops the Timer */
 			outw(devpriv->ctrl &
-			     ~APCI3120_ENABLE_TIMER0 &
-			     ~APCI3120_ENABLE_TIMER1,
+			     ~APCI3120_CTRL_GATE(0) &
+			     ~APCI3120_CTRL_GATE(1),
 			     dev->iobase + APCI3120_WR_ADDRESS);
 		}
 
@@ -1286,7 +1281,7 @@ static int apci3120_config_insn_timer(struct comedi_device *dev,
 	divisor = apci3120_ns_to_timer(dev, 2, data[1], CMDF_ROUND_DOWN);
 
 	/* Reset gate 2 of Timer 2 to disable it (Set Bit D14 to 0) */
-	devpriv->ctrl &= ~APCI3120_ENABLE_TIMER2;
+	devpriv->ctrl &= ~APCI3120_CTRL_GATE(2);
 	outw(devpriv->ctrl, dev->iobase + APCI3120_WR_ADDRESS);
 
 	/*  Disable TIMER Interrupt */
@@ -1398,7 +1393,7 @@ static int apci3120_write_insn_timer(struct comedi_device *dev,
 
 		if (devpriv->b_Timer2Mode == APCI3120_TIMER) {	/* start timer */
 			/* For Timer mode is  Gate2 must be activated	timer started */
-			devpriv->ctrl |= APCI3120_ENABLE_TIMER2;
+			devpriv->ctrl |= APCI3120_CTRL_GATE(2);
 			outw(devpriv->ctrl, dev->iobase + APCI3120_WR_ADDRESS);
 		}
 

drivers/staging/comedi/drivers/addi_apci_3120.c

@@ -15,6 +15,7 @@
 /*
  * PCI BAR 1 register map (dev->iobase)
  */
+#define APCI3120_CTRL_GATE(x)			(1 << (12 + (x)))
 #define APCI3120_CTRL_PR(x)			(((x) & 0xf) << 8)
 #define APCI3120_CTRL_PA(x)			(((x) & 0xf) << 0)
 #define APCI3120_STATUS_TO_VERSION(x)		(((x) >> 4) & 0xf)