staging: comedi: multiq3: tidy up control register bit defines

For aesthetics, move these defines closer to the register define and
use the BIT macro to define the bits.

Add macros to set the bits needed to select the channel for the analog
output, analog input, and encoder (counter) subdevices as well as the
realtime clock registers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/multiq3.c

@@ -50,20 +50,20 @@
 #define MULTIQ3_STATUS_EOC		BIT(3)
 #define MULTIQ3_STATUS_EOC_I		BIT(4)
 #define MULTIQ3_CTRL_REG		0x06
+#define MULTIQ3_CTRL_AO_CHAN(x)		(((x) & 0x7) << 0)
+#define MULTIQ3_CTRL_RC(x)		(((x) & 0x3) << 0)
+#define MULTIQ3_CTRL_AI_CHAN(x)		(((x) & 0x7) << 3)
+#define MULTIQ3_CTRL_E_CHAN(x)		(((x) & 0x7) << 3)
+#define MULTIQ3_CTRL_EN			BIT(6)
+#define MULTIQ3_CTRL_AZ			BIT(7)
+#define MULTIQ3_CTRL_CAL		BIT(8)
+#define MULTIQ3_CTRL_SH			BIT(9)
+#define MULTIQ3_CTRL_CLK		BIT(10)
+#define MULTIQ3_CTRL_LD			(3 << 11)
 #define MULTIQ3_CLK_REG			0x08
 #define MULTIQ3_ENC_DATA_REG		0x0c
 #define MULTIQ3_ENC_CTRL_REG		0x0e
 
-/*
- * flags for CONTROL register
- */
-#define MULTIQ3_AD_MUX_EN      0x0040
-#define MULTIQ3_AD_AUTOZ       0x0080
-#define MULTIQ3_AD_AUTOCAL     0x0100
-#define MULTIQ3_AD_SH          0x0200
-#define MULTIQ3_AD_CLOCK_4M    0x0400
-#define MULTIQ3_DA_LOAD                0x1800
-
 /*
  * flags for encoder control
  */
@@ -85,7 +85,7 @@ static void multiq3_set_ctrl(struct comedi_device *dev, unsigned int bits)
 	 * According to the programming manual, the SH and CLK bits should
 	 * be kept high at all times.
 	 */
-	outw(MULTIQ3_AD_SH | MULTIQ3_AD_CLOCK_4M | bits,
+	outw(MULTIQ3_CTRL_SH | MULTIQ3_CTRL_CLK | bits,
 	     dev->iobase + MULTIQ3_CTRL_REG);
 }
 
@@ -112,7 +112,7 @@ static int multiq3_ai_insn_read(struct comedi_device *dev,
 	int ret;
 	int i;
 
-	multiq3_set_ctrl(dev, MULTIQ3_AD_MUX_EN | (chan << 3));
+	multiq3_set_ctrl(dev, MULTIQ3_CTRL_EN | MULTIQ3_CTRL_AI_CHAN(chan));
 
 	ret = comedi_timeout(dev, s, insn, multiq3_ai_status,
 			     MULTIQ3_STATUS_EOC);
@@ -150,7 +150,8 @@ static int multiq3_ao_insn_write(struct comedi_device *dev,
 
 	for (i = 0; i < insn->n; i++) {
 		val = data[i];
-		multiq3_set_ctrl(dev, MULTIQ3_DA_LOAD | chan);
+		multiq3_set_ctrl(dev, MULTIQ3_CTRL_LD |
+				      MULTIQ3_CTRL_AO_CHAN(chan));
 		outw(val, dev->iobase + MULTIQ3_AO_REG);
 		multiq3_set_ctrl(dev, 0);
 	}
@@ -191,7 +192,8 @@ static int multiq3_encoder_insn_read(struct comedi_device *dev,
 	int n;
 
 	for (n = 0; n < insn->n; n++) {
-		multiq3_set_ctrl(dev, MULTIQ3_AD_MUX_EN | (chan << 3));
+		multiq3_set_ctrl(dev, MULTIQ3_CTRL_EN |
+				      MULTIQ3_CTRL_E_CHAN(chan));
 		outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CTRL_REG);
 		outb(MULTIQ3_TRSFRCNTR_OL, dev->iobase + MULTIQ3_ENC_CTRL_REG);
 		value = inb(dev->iobase + MULTIQ3_ENC_DATA_REG);
@@ -209,7 +211,8 @@ static void encoder_reset(struct comedi_device *dev)
 	int chan;
 
 	for (chan = 0; chan < s->n_chan; chan++) {
-		multiq3_set_ctrl(dev, MULTIQ3_AD_MUX_EN | (chan << 3));
+		multiq3_set_ctrl(dev, MULTIQ3_CTRL_EN |
+				      MULTIQ3_CTRL_E_CHAN(chan));
 		outb(MULTIQ3_EFLAG_RESET, dev->iobase + MULTIQ3_ENC_CTRL_REG);
 		outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CTRL_REG);
 		outb(MULTIQ3_CLOCK_DATA, dev->iobase + MULTIQ3_ENC_DATA_REG);