Staging: comedi: simply read and write functions in adl_pci8164

There are several read and write functions in adl_pci8164 that are
essentially the same thing.  They were created with a cut and paste.
Change them to use a common function.
Signed-off-by: NBill Pemberton <wfp5p@virginia.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/adl_pci8164.c

@@ -208,8 +208,16 @@ static int adl_pci8164_detach(struct comedi_device *dev)
 	return 0;
 }
 
-static int adl_pci8164_insn_read_msts(struct comedi_device *dev, struct comedi_subdevice *s,
-	struct comedi_insn *insn, unsigned int *data)
+/*
+ all the read commands are the same except for the addition a constant
+ * const to the data for inw()
+ */
+static void adl_pci8164_insn_read(struct comedi_device *dev,
+				  struct comedi_subdevice *s,
+				  struct comedi_insn *insn,
+				  unsigned int *data,
+				  char *action,
+				  unsigned short offset)
 {
 	int axis, axis_reg;
 	char *axisname;
@@ -238,127 +246,51 @@ static int adl_pci8164_insn_read_msts(struct comedi_device *dev, struct comedi_s
 		axisname = "X";
 	}
 
-	data[0] = inw(dev->iobase + axis_reg + PCI8164_MSTS);
-	printk("comedi: pci8164 MSTS read -> %04X:%04X on axis %s\n", data[0],
+	data[0] = inw(dev->iobase + axis_reg + offset);
+	printk("comedi: pci8164 %s read -> %04X:%04X on axis %s\n", action, data[0],
 		data[1], axisname);
+}
 
+static int adl_pci8164_insn_read_msts(struct comedi_device *dev,
+				      struct comedi_subdevice *s,
+				      struct comedi_insn *insn,
+				      unsigned int *data)
+{
+	adl_pci8164_insn_read(dev, s, insn, data, "MSTS", PCI8164_MSTS);
 	return 2;
 }
 
 static int adl_pci8164_insn_read_ssts(struct comedi_device *dev, struct comedi_subdevice *s,
 	struct comedi_insn *insn, unsigned int *data)
 {
-	int axis, axis_reg;
-	char *axisname;
-
-	axis = CR_CHAN(insn->chanspec);
-
-	switch (axis) {
-	case 0:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-		break;
-	case 1:
-		axis_reg = PCI8164_AXIS_Y;
-		axisname = "Y";
-		break;
-	case 2:
-		axis_reg = PCI8164_AXIS_Z;
-		axisname = "Z";
-		break;
-	case 3:
-		axis_reg = PCI8164_AXIS_U;
-		axisname = "U";
-		break;
-	default:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-	}
-
-	data[0] = inw(dev->iobase + axis_reg + PCI8164_SSTS);
-	printk("comedi: pci8164 SSTS read -> %04X:%04X on axis %s\n", data[0],
-		data[1], axisname);
-
+	adl_pci8164_insn_read(dev, s, insn, data, "SSTS", PCI8164_SSTS);
 	return 2;
 }
 
 static int adl_pci8164_insn_read_buf0(struct comedi_device *dev, struct comedi_subdevice *s,
 	struct comedi_insn *insn, unsigned int *data)
 {
-	int axis, axis_reg;
-	char *axisname;
-
-	axis = CR_CHAN(insn->chanspec);
-
-	switch (axis) {
-	case 0:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-		break;
-	case 1:
-		axis_reg = PCI8164_AXIS_Y;
-		axisname = "Y";
-		break;
-	case 2:
-		axis_reg = PCI8164_AXIS_Z;
-		axisname = "Z";
-		break;
-	case 3:
-		axis_reg = PCI8164_AXIS_U;
-		axisname = "U";
-		break;
-	default:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-	}
-
-	data[0] = inw(dev->iobase + axis_reg + PCI8164_BUF0);
-	printk("comedi: pci8164 BUF0 read -> %04X:%04X on axis %s\n", data[0],
-		data[1], axisname);
-
+	adl_pci8164_insn_read(dev, s, insn, data, "BUF0", PCI8164_BUF0);
 	return 2;
 }
 
 static int adl_pci8164_insn_read_buf1(struct comedi_device *dev, struct comedi_subdevice *s,
 	struct comedi_insn *insn, unsigned int *data)
 {
-	int axis, axis_reg;
-
-	char *axisname;
-
-	axis = CR_CHAN(insn->chanspec);
-
-	switch (axis) {
-	case 0:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-		break;
-	case 1:
-		axis_reg = PCI8164_AXIS_Y;
-		axisname = "Y";
-		break;
-	case 2:
-		axis_reg = PCI8164_AXIS_Z;
-		axisname = "Z";
-		break;
-	case 3:
-		axis_reg = PCI8164_AXIS_U;
-		axisname = "U";
-		break;
-	default:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-	}
-
-	data[0] = inw(dev->iobase + axis_reg + PCI8164_BUF1);
-	printk("comedi: pci8164 BUF1 read -> %04X:%04X on axis %s\n", data[0],
-		data[1], axisname);
-
+	adl_pci8164_insn_read(dev, s, insn, data, "BUF1", PCI8164_BUF1);
 	return 2;
 }
 
-static int adl_pci8164_insn_write_cmd(struct comedi_device *dev, struct comedi_subdevice *s,
-	struct comedi_insn *insn, unsigned int *data)
+/*
+ all the write commands are the same except for the addition a constant
+ * const to the data for outw()
+ */
+static void adl_pci8164_insn_out(struct comedi_device *dev,
+					struct comedi_subdevice *s,
+					struct comedi_insn *insn,
+					unsigned int *data,
+					char *action,
+					unsigned short offset)
 {
 	unsigned int axis, axis_reg;
 
@@ -388,124 +320,39 @@ static int adl_pci8164_insn_write_cmd(struct comedi_device *dev, struct comedi_s
 		axisname = "X";
 	}
 
-	outw(data[0], dev->iobase + axis_reg + PCI8164_CMD);
-	printk("comedi: pci8164 CMD write -> %04X:%04X on axis %s\n", data[0],
-		data[1], axisname);
+	outw(data[0], dev->iobase + axis_reg + offset);
 
+	printk("comedi: pci8164 %s write -> %04X:%04X on axis %s\n", action,
+	       data[0], data[1], axisname);
+
+}
+
+
+static int adl_pci8164_insn_write_cmd(struct comedi_device *dev, struct comedi_subdevice *s,
+	struct comedi_insn *insn, unsigned int *data)
+{
+	adl_pci8164_insn_out(dev, s, insn, data, "CMD", PCI8164_CMD);
 	return 2;
 }
 
 static int adl_pci8164_insn_write_otp(struct comedi_device *dev, struct comedi_subdevice *s,
 	struct comedi_insn *insn, unsigned int *data)
 {
-	int axis, axis_reg;
-
-	char *axisname;
-
-	axis = CR_CHAN(insn->chanspec);
-
-	switch (axis) {
-	case 0:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-		break;
-	case 1:
-		axis_reg = PCI8164_AXIS_Y;
-		axisname = "Y";
-		break;
-	case 2:
-		axis_reg = PCI8164_AXIS_Z;
-		axisname = "Z";
-		break;
-	case 3:
-		axis_reg = PCI8164_AXIS_U;
-		axisname = "U";
-		break;
-	default:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-	}
-
-	outw(data[0], dev->iobase + axis_reg + PCI8164_OTP);
-	printk("comedi: pci8164 OTP write -> %04X:%04X on axis %s\n", data[0],
-		data[1], axisname);
-
+	adl_pci8164_insn_out(dev, s, insn, data, "OTP", PCI8164_OTP);
 	return 2;
 }
 
 static int adl_pci8164_insn_write_buf0(struct comedi_device *dev,
 	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data)
 {
-	int axis, axis_reg;
-
-	char *axisname;
-
-	axis = CR_CHAN(insn->chanspec);
-
-	switch (axis) {
-	case 0:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-		break;
-	case 1:
-		axis_reg = PCI8164_AXIS_Y;
-		axisname = "Y";
-		break;
-	case 2:
-		axis_reg = PCI8164_AXIS_Z;
-		axisname = "Z";
-		break;
-	case 3:
-		axis_reg = PCI8164_AXIS_U;
-		axisname = "U";
-		break;
-	default:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-	}
-
-	outw(data[0], dev->iobase + axis_reg + PCI8164_BUF0);
-	printk("comedi: pci8164 BUF0 write -> %04X:%04X on axis %s\n", data[0],
-		data[1], axisname);
-
+	adl_pci8164_insn_out(dev, s, insn, data, "BUF0", PCI8164_BUF0);
 	return 2;
 }
 
 static int adl_pci8164_insn_write_buf1(struct comedi_device *dev,
 	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data)
 {
-	int axis, axis_reg;
-
-	char *axisname;
-
-	axis = CR_CHAN(insn->chanspec);
-
-	switch (axis) {
-	case 0:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-		break;
-	case 1:
-		axis_reg = PCI8164_AXIS_Y;
-		axisname = "Y";
-		break;
-	case 2:
-		axis_reg = PCI8164_AXIS_Z;
-		axisname = "Z";
-		break;
-	case 3:
-		axis_reg = PCI8164_AXIS_U;
-		axisname = "U";
-		break;
-	default:
-		axis_reg = PCI8164_AXIS_X;
-		axisname = "X";
-	}
-
-	outw(data[0], dev->iobase + axis_reg + PCI8164_BUF1);
-	printk("comedi: pci8164 BUF1 write -> %04X:%04X on axis %s\n", data[0],
-		data[1], axisname);
-
+	adl_pci8164_insn_out(dev, s, insn, data, "BUF1", PCI8164_BUF1);
 	return 2;
 }