return n;
}
-/*
- Get what we know is there.... Fast!
- This uses 1/2 the bus cycles of read_dregs (below).
-
- The manual claims that we can do a lword read, but it doesn't work here.
-*/
static int ai_read_n(struct comedi_device *dev, struct comedi_subdevice *s,
int count)
{
return 0;
}
-/*
- Handle all rtd520 interrupts.
- Runs atomically and is never re-entered.
- This is a "slow handler"; other interrupts may be active.
- The data conversion may someday happen in a "bottom half".
-*/
static irqreturn_t rtd_interrupt(int irq, void *d)
{
struct comedi_device *dev = d;
return IRQ_HANDLED;
}
-/*
- cmdtest tests a particular command to see if it is valid.
- Using the cmdtest ioctl, a user can create a valid cmd
- and then have it executed by the cmd ioctl (asynchronously).
-
- cmdtest returns 1,2,3,4 or 0, depending on which tests
- the command passes.
-*/
-
static int rtd_ai_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_cmd *cmd)
{
return 0;
}
-/*
- Execute a analog in command with many possible triggering options.
- The data get stored in the async structure of the subdevice.
- This is usually done by an interrupt handler.
- Userland gets to the data using read calls.
-*/
static int rtd_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
struct rtd_private *devpriv = dev->private;
return 0;
}
-/*
- Stop a running data acquisition.
-*/
static int rtd_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
struct rtd_private *devpriv = dev->private;