#include "../comedidev.h"
/* address scheme (page 2.17 of the manual) */
-#define ADQ12B_SIZE 16
-
-#define ADQ12B_CTREG 0x00
-#define ADQ12B_STINR 0x00
-#define ADQ12B_OUTBR 0x04
-#define ADQ12B_ADLOW 0x08
-#define ADQ12B_ADHIG 0x09
-#define ADQ12B_CONT0 0x0c
-#define ADQ12B_CONT1 0x0d
-#define ADQ12B_CONT2 0x0e
-#define ADQ12B_COWORD 0x0f
-
-/* mask of the bit at STINR to check end of conversion */
-#define ADQ12B_EOC 0x20
+#define ADQ12B_CTREG 0x00
+#define ADQ12B_CTREG_MSKP (1 << 7) /* enable pacer interrupt */
+#define ADQ12B_CTREG_GTP (1 << 6) /* enable pacer */
+#define ADQ12B_CTREG_RANGE(x) ((x) << 4)
+#define ADQ12B_CTREG_CHAN(x) ((x) << 0)
+#define ADQ12B_STINR 0x00
+#define ADQ12B_STINR_OUT2 (1 << 7) /* timer 2 output state */
+#define ADQ12B_STINR_OUTP (1 << 6) /* pacer output state */
+#define ADQ12B_STINR_EOC (1 << 5) /* A/D end-of-conversion */
+#define ADQ12B_STINR_IN_MASK (0x1f << 0)
+#define ADQ12B_OUTBR 0x04
+#define ADQ12B_ADLOW 0x08
+#define ADQ12B_ADHIG 0x09
+#define ADQ12B_TIMER_BASE 0x0c
/* available ranges through the PGA gains */
static const struct comedi_lrange range_adq12b_ai_bipolar = {
};
struct adq12b_private {
- int unipolar; /* option 2 of comedi_config (1 is iobase) */
- int differential; /* option 3 of comedi_config */
- int last_channel;
- int last_range;
+ unsigned int last_ctreg;
};
static int adq12b_ai_eoc(struct comedi_device *dev,
unsigned char status;
status = inb(dev->iobase + ADQ12B_STINR);
- if (status & ADQ12B_EOC)
+ if (status & ADQ12B_STINR_EOC)
return 0;
return -EBUSY;
}
-static int adq12b_ai_rinsn(struct comedi_device *dev,
- struct comedi_subdevice *s, struct comedi_insn *insn,
- unsigned int *data)
+static int adq12b_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
{
struct adq12b_private *devpriv = dev->private;
- int n;
- int range, channel;
- unsigned char hi, lo, status;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int range = CR_RANGE(insn->chanspec);
+ unsigned int val;
int ret;
+ int i;
/* change channel and range only if it is different from the previous */
- range = CR_RANGE(insn->chanspec);
- channel = CR_CHAN(insn->chanspec);
- if (channel != devpriv->last_channel || range != devpriv->last_range) {
- outb((range << 4) | channel, dev->iobase + ADQ12B_CTREG);
+ val = ADQ12B_CTREG_RANGE(range) | ADQ12B_CTREG_CHAN(chan);
+ if (val != devpriv->last_ctreg) {
+ outb(val, dev->iobase + ADQ12B_CTREG);
+ devpriv->last_ctreg = val;
udelay(50); /* wait for the mux to settle */
}
- /* trigger conversion */
- status = inb(dev->iobase + ADQ12B_ADLOW);
-
- /* convert n samples */
- for (n = 0; n < insn->n; n++) {
+ val = inb(dev->iobase + ADQ12B_ADLOW); /* trigger A/D */
- /* wait for end of conversion */
+ for (i = 0; i < insn->n; i++) {
ret = comedi_timeout(dev, s, insn, adq12b_ai_eoc, 0);
if (ret)
return ret;
- /* read data */
- hi = inb(dev->iobase + ADQ12B_ADHIG);
- lo = inb(dev->iobase + ADQ12B_ADLOW);
-
- data[n] = (hi << 8) | lo;
+ val = inb(dev->iobase + ADQ12B_ADHIG) << 8;
+ val |= inb(dev->iobase + ADQ12B_ADLOW); /* retriggers A/D */
+ data[i] = val;
}
- /* return the number of samples read/written */
- return n;
+ return insn->n;
}
static int adq12b_di_insn_bits(struct comedi_device *dev,
{
/* only bits 0-4 have information about digital inputs */
- data[1] = (inb(dev->iobase + ADQ12B_STINR) & (0x1f));
+ data[1] = (inb(dev->iobase + ADQ12B_STINR) & ADQ12B_STINR_IN_MASK);
return insn->n;
}
struct comedi_subdevice *s;
int ret;
- ret = comedi_request_region(dev, it->options[0], ADQ12B_SIZE);
+ ret = comedi_request_region(dev, it->options[0], 0x10);
if (ret)
return ret;
if (!devpriv)
return -ENOMEM;
- devpriv->unipolar = it->options[1];
- devpriv->differential = it->options[2];
- /*
- * initialize channel and range to -1 so we make sure we
- * always write at least once to the CTREG in the instruction
- */
- devpriv->last_channel = -1;
- devpriv->last_range = -1;
+ devpriv->last_ctreg = -1; /* force ctreg update */
ret = comedi_alloc_subdevices(dev, 3);
if (ret)
return ret;
+ /* Analog Input subdevice */
s = &dev->subdevices[0];
- /* analog input subdevice */
- s->type = COMEDI_SUBD_AI;
- if (devpriv->differential) {
- s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
- s->n_chan = 8;
+ s->type = COMEDI_SUBD_AI;
+ if (it->options[2]) {
+ s->subdev_flags = SDF_READABLE | SDF_DIFF;
+ s->n_chan = 8;
} else {
- s->subdev_flags = SDF_READABLE | SDF_GROUND;
- s->n_chan = 16;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND;
+ s->n_chan = 16;
}
+ s->maxdata = 0xfff;
+ s->range_table = it->options[1] ? &range_adq12b_ai_unipolar
+ : &range_adq12b_ai_bipolar;
+ s->insn_read = adq12b_ai_insn_read;
- if (devpriv->unipolar)
- s->range_table = &range_adq12b_ai_unipolar;
- else
- s->range_table = &range_adq12b_ai_bipolar;
-
- s->maxdata = 0xfff;
-
- s->len_chanlist = 4; /* This is the maximum chanlist length that
- the board can handle */
- s->insn_read = adq12b_ai_rinsn;
-
+ /* Digital Input subdevice */
s = &dev->subdevices[1];
- /* digital input subdevice */
- s->type = COMEDI_SUBD_DI;
- s->subdev_flags = SDF_READABLE;
- s->n_chan = 5;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = adq12b_di_insn_bits;
-
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 5;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = adq12b_di_insn_bits;
+
+ /* Digital Output subdevice */
s = &dev->subdevices[2];
- /* digital output subdevice */
- s->type = COMEDI_SUBD_DO;
- s->subdev_flags = SDF_WRITABLE;
- s->n_chan = 8;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = adq12b_do_insn_bits;
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 8;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = adq12b_do_insn_bits;
return 0;
}
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