Rename these defines and use the BIT macro to define the bits. Define
some macros for the multi-bit fields in the register.
Rename the private data 'control_state' member to better match the
register name.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/das16m1.c | 34 ++++++++++++++++++--------------
1 file changed, 19 insertions(+), 15 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das16m1.c
b/drivers/staging/comedi/drivers/das16m1.c
index ce788ae..5b1d1fc 100644
--- a/drivers/staging/comedi/drivers/das16m1.c
+++ b/drivers/staging/comedi/drivers/das16m1.c
@@ -73,11 +73,13 @@
#define DAS16M1_DI_REG 0x03
#define DAS16M1_DO_REG 0x03
#define DAS16M1_CLR_INTR_REG 0x04
-#define DAS16M1_INTR_CONTROL 5
-#define EXT_PACER 0x2
-#define INT_PACER 0x3
-#define PACER_MASK 0x3
-#define INTE 0x80
+#define DAS16M1_INTR_CTRL_REG 0x05
+#define DAS16M1_INTR_CTRL_PACER(x) (((x) & 0x3) << 0)
+#define DAS16M1_INTR_CTRL_PACER_EXT DAS16M1_INTR_CTRL_PACER(2)
+#define DAS16M1_INTR_CTRL_PACER_INT DAS16M1_INTR_CTRL_PACER(3)
+#define DAS16M1_INTR_CTRL_PACER_MASK DAS16M1_INTR_CTRL_PACER(3)
+#define DAS16M1_INTR_CTRL_IRQ(x) (((x) & 0x7) << 4)
+#define DAS16M1_INTR_CTRL_INTE BIT(7)
#define DAS16M1_QUEUE_ADDR 6
#define DAS16M1_QUEUE_DATA 7
#define Q_CHAN(x) ((x) & 0x7)
@@ -104,7 +106,7 @@ static const struct comedi_lrange range_das16m1 = {
struct das16m1_private_struct {
struct comedi_8254 *counter;
- unsigned int control_state;
+ unsigned int intr_ctrl;
unsigned int adc_count;
u16 initial_hw_count;
unsigned short ai_buffer[FIFO_SIZE];
@@ -253,13 +255,13 @@ static int das16m1_cmd_exec(struct comedi_device *dev,
}
/* enable interrupts and set internal pacer counter mode and counts */
- devpriv->control_state &= ~PACER_MASK;
+ devpriv->intr_ctrl &= ~DAS16M1_INTR_CTRL_PACER_MASK;
if (cmd->convert_src == TRIG_TIMER) {
comedi_8254_update_divisors(dev->pacer);
comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
- devpriv->control_state |= INT_PACER;
+ devpriv->intr_ctrl |= DAS16M1_INTR_CTRL_PACER_INT;
} else { /* TRIG_EXT */
- devpriv->control_state |= EXT_PACER;
+ devpriv->intr_ctrl |= DAS16M1_INTR_CTRL_PACER_EXT;
}
/* set control & status register */
@@ -276,8 +278,8 @@ static int das16m1_cmd_exec(struct comedi_device *dev,
/* clear interrupt */
outb(0, dev->iobase + DAS16M1_CLR_INTR_REG);
- devpriv->control_state |= INTE;
- outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+ devpriv->intr_ctrl |= DAS16M1_INTR_CTRL_INTE;
+ outb(devpriv->intr_ctrl, dev->iobase + DAS16M1_INTR_CTRL_REG);
return 0;
}
@@ -286,8 +288,10 @@ static int das16m1_cancel(struct comedi_device *dev,
struct comedi_subdevice *s)
{
struct das16m1_private_struct *devpriv = dev->private;
- devpriv->control_state &= ~INTE & ~PACER_MASK;
- outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+ /* disable interrupts and pacer */
+ devpriv->intr_ctrl &= ~(DAS16M1_INTR_CTRL_INTE |
+ DAS16M1_INTR_CTRL_PACER_MASK);
+ outb(devpriv->intr_ctrl, dev->iobase + DAS16M1_INTR_CTRL_REG);
return 0;
}
@@ -592,8 +596,8 @@ static int das16m1_attach(struct comedi_device *dev,
outb(0, dev->iobase + DAS16M1_DO_REG);
/* set the interrupt level */
- devpriv->control_state = das16m1_irq_bits(dev->irq) << 4;
- outb(devpriv->control_state, dev->iobase + DAS16M1_INTR_CONTROL);
+ devpriv->intr_ctrl = DAS16M1_INTR_CTRL_IRQ(das16m1_irq_bits(dev->irq));
+ outb(devpriv->intr_ctrl, dev->iobase + DAS16M1_INTR_CTRL_REG);
return 0;
}
--
2.6.3
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