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staging: comedi: pcmmio: factor the trigger handling out of interrupt_pcmmio() 

Factor the code that actually handles the digital input triggers out of
the interrupt handler.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-12-09 15:31:14 -07:00 committed by Greg Kroah-Hartman
parent eacc792d2c
commit 967e7e5a99
1 changed files with 56 additions and 52 deletions
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108
drivers/staging/comedi/drivers/pcmmio.c
View File

@ -354,10 +354,64 @@ static void pcmmio_stop_intr(struct comedi_device *dev,
pcmmio_dio_write(dev, 0, PCMMIO_PAGE_ENAB, 0);
}
static void pcmmio_handle_dio_intr(struct comedi_device *dev,
struct comedi_subdevice *s,
unsigned int triggered)
{
struct pcmmio_private *devpriv = dev->private;
unsigned long flags;
unsigned oldevents;
spin_lock_irqsave(&devpriv->spinlock, flags);
oldevents = s->async->events;
if (devpriv->active) {
unsigned mytrig = ((triggered >> 0) & ((1 << 24) - 1)) << 0;
if (mytrig & devpriv->enabled_mask) {
unsigned int val = 0;
unsigned int n, ch, len;
len = s->async->cmd.chanlist_len;
for (n = 0; n < len; n++) {
ch = CR_CHAN(s->async->cmd.chanlist[n]);
if (mytrig & (1U << ch))
val |= (1U << n);
}
/* Write the scan to the buffer. */
if (comedi_buf_put(s->async, val) &&
comedi_buf_put (s->async, val >> 16)) {
s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS);
} else {
/* Overflow! Stop acquisition!! */
/* TODO: STOP_ACQUISITION_CALL_HERE!! */
pcmmio_stop_intr(dev, s);
}
/* Check for end of acquisition. */
if (!devpriv->continuous) {
/* stop_src == TRIG_COUNT */
if (devpriv->stop_count > 0) {
devpriv->stop_count--;
if (devpriv->stop_count == 0) {
s->async->events |= COMEDI_CB_EOA;
/* TODO: STOP_ACQUISITION_CALL_HERE!! */
pcmmio_stop_intr(dev, s);
}
}
}
}
}
spin_unlock_irqrestore(&devpriv->spinlock, flags);
if (oldevents != s->async->events)
comedi_event(dev, s);
}
static irqreturn_t interrupt_pcmmio(int irq, void *d)
{
struct comedi_device *dev = d;
struct pcmmio_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->read_subdev;
unsigned int triggered;
unsigned char int_pend;
@ -371,57 +425,7 @@ static irqreturn_t interrupt_pcmmio(int irq, void *d)
triggered = pcmmio_dio_read(dev, PCMMIO_PAGE_INT_ID, 0);
pcmmio_dio_write(dev, 0, PCMMIO_PAGE_INT_ID, 0);
if (triggered) {
/* TODO here: dispatch io lines to subdevs with commands */
unsigned long flags;
unsigned oldevents;
spin_lock_irqsave(&devpriv->spinlock, flags);
oldevents = s->async->events;
if (devpriv->active) {
unsigned mytrig = ((triggered >> 0) & ((1 << 24) - 1)) << 0;
if (mytrig & devpriv->enabled_mask) {
unsigned int val = 0;
unsigned int n, ch, len;
len = s->async->cmd.chanlist_len;
for (n = 0; n < len; n++) {
ch = CR_CHAN(s->async->cmd.chanlist[n]);
if (mytrig & (1U << ch))
val |= (1U << n);
}
/* Write the scan to the buffer. */
if (comedi_buf_put(s->async, val) &&
comedi_buf_put (s->async, val >> 16)) {
s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS);
} else {
/* Overflow! Stop acquisition!! */
/* TODO: STOP_ACQUISITION_CALL_HERE!! */
pcmmio_stop_intr(dev, s);
}
/* Check for end of acquisition. */
if (!devpriv->continuous) {
/* stop_src == TRIG_COUNT */
if (devpriv->stop_count > 0) {
devpriv->stop_count--;
if (devpriv->stop_count == 0) {
s->async->events |= COMEDI_CB_EOA;
/* TODO: STOP_ACQUISITION_CALL_HERE!! */
pcmmio_stop_intr(dev, s);
}
}
}
}
}
spin_unlock_irqrestore(&devpriv->spinlock, flags);
if (oldevents != s->async->events)
comedi_event(dev, s);
}
pcmmio_handle_dio_intr(dev, s, triggered);
return IRQ_HANDLED;
}