static irqreturn_t apci1032_interrupt(int irq, void *d)
{
struct comedi_device *dev = d;
struct apci1032_private *devpriv = dev->private;
struct comedi_subdevice *s = dev->read_subdev;
unsigned int ctrl;
/* check interrupt is from this device */
if ((inl(devpriv->amcc_iobase + AMCC_OP_REG_INTCSR) &
INTCSR_INTR_ASSERTED) == 0)
return IRQ_NONE;
/* check interrupt is enabled */
ctrl = inl(dev->iobase + APCI1032_CTRL_REG);
if ((ctrl & APCI1032_CTRL_INT_ENA) == 0)
return IRQ_HANDLED;
/* disable the interrupt */
outl(ctrl & ~APCI1032_CTRL_INT_ENA, dev->iobase + APCI1032_CTRL_REG);
s->state = inl(dev->iobase + APCI1032_STATUS_REG) & 0xffff;
comedi_buf_write_samples(s, &s->state, 1);
comedi_handle_events(dev, s);
/* enable the interrupt */
outl(ctrl, dev->iobase + APCI1032_CTRL_REG);
return IRQ_HANDLED;
}
static irqreturn_t dmm32at_isr(int irq, void *d)
{
struct comedi_device *dev = d;
unsigned char intstat;
unsigned int val;
int i;
if (!dev->attached) {
dev_err(dev->class_dev, "spurious interrupt\n");
return IRQ_HANDLED;
}
intstat = inb(dev->iobase + DMM32AT_INTCLK_REG);
if (intstat & DMM32AT_INTCLK_ADINT) {
struct comedi_subdevice *s = dev->read_subdev;
struct comedi_cmd *cmd = &s->async->cmd;
for (i = 0; i < cmd->chanlist_len; i++) {
val = dmm32at_ai_get_sample(dev, s);
comedi_buf_write_samples(s, &val, 1);
}
if (cmd->stop_src == TRIG_COUNT &&
s->async->scans_done >= cmd->stop_arg)
s->async->events |= COMEDI_CB_EOA;
comedi_handle_events(dev, s);
}
/* reset the interrupt */
outb(DMM32AT_CTRL_INTRST, dev->iobase + DMM32AT_CTRL_REG);
return IRQ_HANDLED;
}
static irqreturn_t pc236_interrupt(int irq, void *d)
{
struct comedi_device *dev = d;
struct comedi_subdevice *s = dev->read_subdev;
bool handled;
handled = pc236_intr_check(dev);
if (dev->attached && handled) {
comedi_buf_write_samples(s, &s->state, 1);
comedi_handle_events(dev, s);
}
return IRQ_RETVAL(handled);
}
static int dio200_handle_read_intr(struct comedi_device *dev,
struct comedi_subdevice *s)
{
const struct dio200_board *board = dev->board_ptr;
struct dio200_subdev_intr *subpriv = s->private;
unsigned triggered;
unsigned intstat;
unsigned cur_enabled;
unsigned long flags;
triggered = 0;
spin_lock_irqsave(&subpriv->spinlock, flags);
if (board->has_int_sce) {
/*
* Collect interrupt sources that have triggered and disable
* them temporarily. Loop around until no extra interrupt
* sources have triggered, at which point, the valid part of
* the interrupt status register will read zero, clearing the
* cause of the interrupt.
*
* Mask off interrupt sources already seen to avoid infinite
* loop in case of misconfiguration.
*/
cur_enabled = subpriv->enabled_isns;
while ((intstat = (dio200_read8(dev, subpriv->ofs) &
subpriv->valid_isns & ~triggered)) != 0) {
triggered |= intstat;
cur_enabled &= ~triggered;
dio200_write8(dev, subpriv->ofs, cur_enabled);
}
} else {
/*
* No interrupt status register. Assume the single interrupt
* source has triggered.
*/
triggered = subpriv->enabled_isns;
}
if (triggered) {
/*
* Some interrupt sources have triggered and have been
* temporarily disabled to clear the cause of the interrupt.
*
* Reenable them NOW to minimize the time they are disabled.
*/
cur_enabled = subpriv->enabled_isns;
if (board->has_int_sce)
dio200_write8(dev, subpriv->ofs, cur_enabled);
if (subpriv->active) {
/*
* The command is still active.
*
* Ignore interrupt sources that the command isn't
* interested in (just in case there's a race
* condition).
*/
if (triggered & subpriv->enabled_isns)
/* Collect scan data. */
dio200_read_scan_intr(dev, s, triggered);
}
}
spin_unlock_irqrestore(&subpriv->spinlock, flags);
comedi_handle_events(dev, s);
return (triggered != 0);
}