[PATCH 07/15] staging: comedi: addi_apci_1564: fix timer iobase for all PLD revisions

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The APCI-1564 has different I/O mapping depending on if the PLD revision
is Rev 1.0 or Rev 2.x.

Add a member, 'timer', to the private data for the base address of the
12-bit timer. Fix the register defines so they will work for all PLD
revisions and initialize the devpriv->timer appropriately.

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 .../comedi/drivers/addi-data/hwdrv_apci1564.c      | 32 ++++++++++--------
 drivers/staging/comedi/drivers/addi_apci_1564.c    | 38 ++++++++++++++--------
 2 files changed, 42 insertions(+), 28 deletions(-)

diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
index 1c313bc..b689303 100644
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
@@ -52,15 +52,15 @@ static int apci1564_timer_config(struct comedi_device *dev,
 	devpriv->tsk_current = current;
 	if (data[0] == ADDIDATA_TIMER) {
 		/* First Stop The Timer */
-		ul_Command1 = inl(dev->iobase + APCI1564_TIMER_CTRL_REG);
+		ul_Command1 = inl(devpriv->timer + APCI1564_TIMER_CTRL_REG);
 		ul_Command1 = ul_Command1 & 0xFFFFF9FEUL;
 		/* Stop The Timer */
-		outl(ul_Command1, dev->iobase + APCI1564_TIMER_CTRL_REG);
+		outl(ul_Command1, devpriv->timer + APCI1564_TIMER_CTRL_REG);
 
 		devpriv->timer_select_mode = ADDIDATA_TIMER;
 		if (data[1] == 1) {
 			/* Enable TIMER int & DISABLE ALL THE OTHER int SOURCES */
-			outl(0x02, dev->iobase + APCI1564_TIMER_CTRL_REG);
+			outl(0x02, devpriv->timer + APCI1564_TIMER_CTRL_REG);
 			outl(0x0, dev->iobase + APCI1564_DI_IRQ_REG);
 			outl(0x0, dev->iobase + APCI1564_DO_IRQ_REG);
 			outl(0x0, dev->iobase + APCI1564_WDOG_IRQ_REG);
@@ -72,19 +72,19 @@ static int apci1564_timer_config(struct comedi_device *dev,
 			     devpriv->counters + APCI1564_COUNTER_IRQ_REG(2));
 		} else {
 			/* disable Timer interrupt */
-			outl(0x0, dev->iobase + APCI1564_TIMER_CTRL_REG);
+			outl(0x0, devpriv->timer + APCI1564_TIMER_CTRL_REG);
 		}
 
 		/*  Loading Timebase */
-		outl(data[2], dev->iobase + APCI1564_TIMER_TIMEBASE_REG);
+		outl(data[2], devpriv->timer + APCI1564_TIMER_TIMEBASE_REG);
 
 		/* Loading the Reload value */
-		outl(data[3], dev->iobase + APCI1564_TIMER_RELOAD_REG);
+		outl(data[3], devpriv->timer + APCI1564_TIMER_RELOAD_REG);
 
-		ul_Command1 = inl(dev->iobase + APCI1564_TIMER_CTRL_REG);
+		ul_Command1 = inl(devpriv->timer + APCI1564_TIMER_CTRL_REG);
 		ul_Command1 = (ul_Command1 & 0xFFF719E2UL) | 2UL << 13UL | 0x10UL;
 		/* mode 2 */
-		outl(ul_Command1, dev->iobase + APCI1564_TIMER_CTRL_REG);
+		outl(ul_Command1, devpriv->timer + APCI1564_TIMER_CTRL_REG);
 	} else if (data[0] == ADDIDATA_COUNTER) {
 		devpriv->timer_select_mode = ADDIDATA_COUNTER;
 
@@ -146,17 +146,21 @@ static int apci1564_timer_write(struct comedi_device *dev,
 
 	if (devpriv->timer_select_mode == ADDIDATA_TIMER) {
 		if (data[1] == 1) {
-			ul_Command1 = inl(dev->iobase + APCI1564_TIMER_CTRL_REG);
+			ul_Command1 = inl(devpriv->timer +
+					  APCI1564_TIMER_CTRL_REG);
 			ul_Command1 = (ul_Command1 & 0xFFFFF9FFUL) | 0x1UL;
 
 			/* Enable the Timer */
-			outl(ul_Command1, dev->iobase + APCI1564_TIMER_CTRL_REG);
+			outl(ul_Command1,
+			     devpriv->timer + APCI1564_TIMER_CTRL_REG);
 		} else if (data[1] == 0) {
 			/* Stop The Timer */
 
-			ul_Command1 = inl(dev->iobase + APCI1564_TIMER_CTRL_REG);
+			ul_Command1 = inl(devpriv->timer +
+					  APCI1564_TIMER_CTRL_REG);
 			ul_Command1 = ul_Command1 & 0xFFFFF9FEUL;
-			outl(ul_Command1, dev->iobase + APCI1564_TIMER_CTRL_REG);
+			outl(ul_Command1,
+			     devpriv->timer + APCI1564_TIMER_CTRL_REG);
 		}
 	} else if (devpriv->timer_select_mode == ADDIDATA_COUNTER) {
 		ul_Command1 = inl(devpriv->counters +
@@ -194,10 +198,10 @@ static int apci1564_timer_read(struct comedi_device *dev,
 
 	if (devpriv->timer_select_mode == ADDIDATA_TIMER) {
 		/*  Stores the status of the Timer */
-		data[0] = inl(dev->iobase + APCI1564_TIMER_STATUS_REG) & 0x1;
+		data[0] = inl(devpriv->timer + APCI1564_TIMER_STATUS_REG) & 0x1;
 
 		/*  Stores the Actual value of the Timer */
-		data[1] = inl(dev->iobase + APCI1564_TIMER_REG);
+		data[1] = inl(devpriv->timer + APCI1564_TIMER_REG);
 	} else if (devpriv->timer_select_mode == ADDIDATA_COUNTER) {
 		/*  Read the Counter Actual Value. */
 		data[0] = inl(devpriv->counters +
diff --git a/drivers/staging/comedi/drivers/addi_apci_1564.c b/drivers/staging/comedi/drivers/addi_apci_1564.c
index 0fa7f72..b74e6c6 100644
--- a/drivers/staging/comedi/drivers/addi_apci_1564.c
+++ b/drivers/staging/comedi/drivers/addi_apci_1564.c
@@ -51,7 +51,9 @@
 #define APCI1564_EEPROM_DO			(1 << 2)
 #define APCI1564_EEPROM_CS			(1 << 1)
 #define APCI1564_EEPROM_CLK			(1 << 0)
+#define APCI1564_REV1_TIMER_IOBASE		0x04
 #define APCI1564_REV2_MAIN_IOBASE		0x04
+#define APCI1564_REV2_TIMER_IOBASE		0x48
 
 /*
  * PCI BAR 1
@@ -90,18 +92,24 @@
 #define APCI1564_WDOG_IRQ_REG			0x38
 #define APCI1564_WDOG_WARN_TIMEVAL_REG		0x3c
 #define APCI1564_WDOG_WARN_TIMEBASE_REG		0x40
-#define APCI1564_TIMER_REG			0x44
-#define APCI1564_TIMER_RELOAD_REG		0x48
-#define APCI1564_TIMER_TIMEBASE_REG		0x4c
-#define APCI1564_TIMER_CTRL_REG			0x50
-#define APCI1564_TIMER_STATUS_REG		0x54
-#define APCI1564_TIMER_IRQ_REG			0x58
-#define APCI1564_TIMER_WARN_TIMEVAL_REG		0x5c  /* Rev 2.x only */
-#define APCI1564_TIMER_WARN_TIMEBASE_REG	0x60  /* Rev 2.x only */
 
+/*
+ * devpriv->timer Register Map
+ *   PLD Revision 1.0 - PCI BAR 0 + 0x04
+ *   PLD Revision 2.x - PCI BAR 0 + 0x48
+ */
+#define APCI1564_TIMER_REG			0x00
+#define APCI1564_TIMER_RELOAD_REG		0x04
+#define APCI1564_TIMER_TIMEBASE_REG		0x08
+#define APCI1564_TIMER_CTRL_REG			0x0c
+#define APCI1564_TIMER_STATUS_REG		0x10
+#define APCI1564_TIMER_IRQ_REG			0x14
+#define APCI1564_TIMER_WARN_TIMEVAL_REG		0x18  /* Rev 2.x only */
+#define APCI1564_TIMER_WARN_TIMEBASE_REG	0x1c  /* Rev 2.x only */
 
 struct apci1564_private {
 	unsigned long eeprom;		/* base address of EEPROM register */
+	unsigned long timer;		/* base address of 12-bit timer */
 	unsigned long counters;		/* base address of 32-bit counters */
 	unsigned int mode1;		/* riding-edge/high level channels */
 	unsigned int mode2;		/* falling-edge/low level channels */
@@ -130,8 +138,8 @@ static int apci1564_reset(struct comedi_device *dev)
 	addi_watchdog_reset(dev->iobase + APCI1564_WDOG_REG);
 
 	/* Reset the timer registers */
-	outl(0x0, dev->iobase + APCI1564_TIMER_CTRL_REG);
-	outl(0x0, dev->iobase + APCI1564_TIMER_RELOAD_REG);
+	outl(0x0, devpriv->timer + APCI1564_TIMER_CTRL_REG);
+	outl(0x0, devpriv->timer + APCI1564_TIMER_RELOAD_REG);
 
 	/* Reset the counter registers */
 	outl(0x0, devpriv->counters + APCI1564_COUNTER_CTRL_REG(0));
@@ -165,17 +173,17 @@ static irqreturn_t apci1564_interrupt(int irq, void *d)
 		outl(status, dev->iobase + APCI1564_DI_IRQ_REG);
 	}
 
-	status = inl(dev->iobase + APCI1564_TIMER_IRQ_REG);
+	status = inl(devpriv->timer + APCI1564_TIMER_IRQ_REG);
 	if (status & 0x01) {
 		/*  Disable Timer Interrupt */
-		ctrl = inl(dev->iobase + APCI1564_TIMER_CTRL_REG);
-		outl(0x0, dev->iobase + APCI1564_TIMER_CTRL_REG);
+		ctrl = inl(devpriv->timer + APCI1564_TIMER_CTRL_REG);
+		outl(0x0, devpriv->timer + APCI1564_TIMER_CTRL_REG);
 
 		/* Send a signal to from kernel to user space */
 		send_sig(SIGIO, devpriv->tsk_current, 0);
 
 		/*  Enable Timer Interrupt */
-		outl(ctrl, dev->iobase + APCI1564_TIMER_CTRL_REG);
+		outl(ctrl, devpriv->timer + APCI1564_TIMER_CTRL_REG);
 	}
 
 	for (chan = 0; chan < 4; chan++) {
@@ -441,12 +449,14 @@ static int apci1564_auto_attach(struct comedi_device *dev,
 		/* PLD Revision 1.0 I/O Mapping */
 		dev->iobase = pci_resource_start(pcidev, 1) +
 			      APCI1564_REV1_MAIN_IOBASE;
+		devpriv->timer = devpriv->eeprom + APCI1564_REV1_TIMER_IOBASE;
 		dev_err(dev->class_dev,
 			"PLD Revision 1.0 detected, not yet supported\n");
 		return -ENXIO;
 	} else {
 		/* PLD Revision 2.x I/O Mapping */
 		dev->iobase = devpriv->eeprom + APCI1564_REV2_MAIN_IOBASE;
+		devpriv->timer = devpriv->eeprom + APCI1564_REV2_TIMER_IOBASE;
 		devpriv->counters = pci_resource_start(pcidev, 1);
 	}
 
-- 
2.0.3

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