[PATCH 28/66] staging: comedi: pcl816: remove 'int816_mode' from private data
H Hartley Sweeten
hsweeten at visionengravers.com
Fri Feb 28 23:24:17 UTC 2014
This member of the private data is not needed. We can determine the
inerrupt 'mode' based on the 'dma' member.
Refactor the interrupt handler and the (*cancel) function to not use
the 'int816_mode' and remove the setting of this member in the (*do_cmd)
heler function.
Signed-off-by: H Hartley Sweeten <hsweeten at visionengravers.com>
Cc: Ian Abbott <abbotti at mev.co.uk>
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
drivers/staging/comedi/drivers/pcl816.c | 75 +++++++++++----------------------
1 file changed, 25 insertions(+), 50 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcl816.c b/drivers/staging/comedi/drivers/pcl816.c
index fdf3335..ffc2c12 100644
--- a/drivers/staging/comedi/drivers/pcl816.c
+++ b/drivers/staging/comedi/drivers/pcl816.c
@@ -64,12 +64,6 @@ Configuration Options:
/* R: high byte of A/D W: A/D range control */
#define PCL816_AD_HI 9
-/* type of interrupt handler */
-#define INT_TYPE_AI1_INT 1
-#define INT_TYPE_AI1_DMA 2
-#define INT_TYPE_AI3_INT 4
-#define INT_TYPE_AI3_DMA 5
-
#define MAGIC_DMA_WORD 0x5a5a
static const struct comedi_lrange range_pcl816 = {
@@ -115,7 +109,6 @@ struct pcl816_private {
int next_dma_buf; /* which DMA buffer will be used next round */
long dma_runs_to_end; /* how many we must permorm DMA transfer to end of record */
unsigned long last_dma_run; /* how many bytes we must transfer on last DMA page */
- int int816_mode; /* who now uses IRQ - 1=AI1 int, 2=AI1 dma, 3=AI3 int, 4AI3 dma */
int ai_act_scan; /* how many scans we finished */
unsigned int ai_act_chanlist[16]; /* MUX setting for actual AI operations */
unsigned int ai_poll_ptr; /* how many sampes transfer poll */
@@ -371,8 +364,7 @@ static irqreturn_t interrupt_pcl816(int irq, void *d)
struct comedi_device *dev = d;
struct pcl816_private *devpriv = dev->private;
- if (!dev->attached || !devpriv->ai_cmd_running ||
- !devpriv->int816_mode) {
+ if (!dev->attached || !devpriv->ai_cmd_running) {
outb(0, dev->iobase + PCL816_CLRINT);
return IRQ_HANDLED;
}
@@ -383,17 +375,10 @@ static irqreturn_t interrupt_pcl816(int irq, void *d)
return IRQ_HANDLED;
}
- switch (devpriv->int816_mode) {
- case INT_TYPE_AI1_DMA:
- case INT_TYPE_AI3_DMA:
+ if (devpriv->dma)
return interrupt_pcl816_ai_mode13_dma(irq, d);
- case INT_TYPE_AI1_INT:
- case INT_TYPE_AI3_INT:
+ else
return interrupt_pcl816_ai_mode13_int(irq, d);
- }
-
- outb(0, dev->iobase + PCL816_CLRINT);
- return IRQ_HANDLED;
}
static int pcl816_ai_cmdtest(struct comedi_device *dev,
@@ -506,8 +491,6 @@ static int pcl816_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
switch (cmd->convert_src) {
case TRIG_TIMER:
- devpriv->int816_mode = INT_TYPE_AI1_DMA;
-
/* Pacer+IRQ+DMA */
outb(0x32, dev->iobase + PCL816_CONTROL);
@@ -516,8 +499,6 @@ static int pcl816_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
break;
default:
- devpriv->int816_mode = INT_TYPE_AI3_DMA;
-
/* Ext trig+IRQ+DMA */
outb(0x34, dev->iobase + PCL816_CONTROL);
@@ -579,36 +560,30 @@ static int pcl816_ai_cancel(struct comedi_device *dev,
if (!devpriv->ai_cmd_running)
return 0;
- switch (devpriv->int816_mode) {
- case INT_TYPE_AI1_DMA:
- case INT_TYPE_AI3_DMA:
+ if (devpriv->dma)
disable_dma(devpriv->dma);
- case INT_TYPE_AI1_INT:
- case INT_TYPE_AI3_INT:
- outb(inb(dev->iobase + PCL816_CONTROL) & 0x73,
- dev->iobase + PCL816_CONTROL); /* Stop A/D */
- udelay(1);
- outb(0, dev->iobase + PCL816_CONTROL); /* Stop A/D */
-
- /* Stop pacer */
- i8254_set_mode(dev->iobase + PCL816_TIMER_BASE, 0,
- 2, I8254_MODE0 | I8254_BINARY);
- i8254_set_mode(dev->iobase + PCL816_TIMER_BASE, 0,
- 1, I8254_MODE0 | I8254_BINARY);
-
- outb(0, dev->iobase + PCL816_AD_LO);
- pcl816_ai_get_sample(dev, s);
-
- /* clear INT request */
- outb(0, dev->iobase + PCL816_CLRINT);
- /* Stop A/D */
- outb(0, dev->iobase + PCL816_CONTROL);
- devpriv->ai_cmd_running = 0;
- devpriv->ai_cmd_canceled = 1;
- devpriv->int816_mode = 0;
- break;
- }
+ outb(inb(dev->iobase + PCL816_CONTROL) & 0x73,
+ dev->iobase + PCL816_CONTROL); /* Stop A/D */
+ udelay(1);
+ outb(0, dev->iobase + PCL816_CONTROL); /* Stop A/D */
+
+ /* Stop pacer */
+ i8254_set_mode(dev->iobase + PCL816_TIMER_BASE, 0,
+ 2, I8254_MODE0 | I8254_BINARY);
+ i8254_set_mode(dev->iobase + PCL816_TIMER_BASE, 0,
+ 1, I8254_MODE0 | I8254_BINARY);
+
+ outb(0, dev->iobase + PCL816_AD_LO);
+ pcl816_ai_get_sample(dev, s);
+
+ /* clear INT request */
+ outb(0, dev->iobase + PCL816_CLRINT);
+
+ /* Stop A/D */
+ outb(0, dev->iobase + PCL816_CONTROL);
+ devpriv->ai_cmd_running = 0;
+ devpriv->ai_cmd_canceled = 1;
return 0;
}
--
1.8.5.2
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