These comments are not necessary, they are just cut-and-paste from
the skel driver.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/s526.c | 58 ++---------------------------------
1 file changed, 2 insertions(+), 56 deletions(-)
diff --git a/drivers/staging/comedi/drivers/s526.c b/drivers/staging/comedi/drivers/s526.c
index 1ae250b..0f1ef98 100644
--- a/drivers/staging/comedi/drivers/s526.c
+++ b/drivers/staging/comedi/drivers/s526.c
@@ -138,11 +138,6 @@ struct s526GPCTConfig {
int data[MAX_GPCT_CONFIG_DATA];
};
-/*
- * Board descriptions for two imaginary boards. Describing the
- * boards in this way is optional, and completely driver-dependent.
- * Some drivers use arrays such as this, other do not.
- */
struct s526_board {
const char *name;
int gpct_chans;
@@ -167,11 +162,6 @@ static const struct s526_board s526_boards[] = {
}
};
-/* this structure is for data unique to this hardware driver. If
- several hardware drivers keep similar information in this structure,
- feel free to suggest moving the variable to the struct comedi_device
- struct.
-*/
struct s526_private {
unsigned int ao_readback[2];
struct s526GPCTConfig s526_gpct_config[4];
@@ -496,10 +486,6 @@ static int s526_ai_insn_config(struct comedi_device *dev,
return result;
}
-/*
- * "instructions" read/write data in "one-shot" or "software-triggered"
- * mode.
- */
static int s526_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
@@ -552,30 +538,18 @@ static int s526_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
unsigned short val;
val = chan << 1;
-/* outw(val, dev->iobase + REG_DAC); */
outw(val, dev->iobase + REG_DAC);
- /* Writing a list of values to an AO channel is probably not
- * very useful, but that's how the interface is defined. */
for (i = 0; i < insn->n; i++) {
- /* a typical programming sequence */
- /* write the data to preload register
- * outw(data[i], dev->iobase + REG_ADD);
- */
- /* write the data to preload register */
outw(data[i], dev->iobase + REG_ADD);
devpriv->ao_readback[chan] = data[i];
-/* outw(val + 1, dev->iobase + REG_DAC); starts the D/A conversion. */
/* starts the D/A conversion */
outw(val + 1, dev->iobase + REG_DAC);
}
- /* return the number of samples read/written */
return i;
}
-/* AO subdevices should have a read insn as well as a write insn.
- * Usually this means copying a value stored in devpriv. */
static int s526_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
@@ -589,30 +563,18 @@ static int s526_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
return i;
}
-/* DIO devices are slightly special. Although it is possible to
- * implement the insn_read/insn_write interface, it is much more
- * useful to applications if you implement the insn_bits interface.
- * This allows packed reading/writing of the DIO channels. The
- * comedi core can convert between insn_bits and insn_read/write */
static int s526_dio_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
{
- /* The insn data is a mask in data[0] and the new data
- * in data[1], each channel cooresponding to a bit. */
if (data[0]) {
s->state &= ~data[0];
s->state |= data[0] & data[1];
- /* Write out the new digital output lines */
+
outw(s->state, dev->iobase + REG_DIO);
}
- /* on return, data[1] contains the value of the digital
- * input and output lines. */
data[1] = inw(dev->iobase + REG_DIO) & 0xff;
- /* or we could just return the software copy of the output values if
- * it was a purely digital output subdevice */
- /* data[1]=s->state & 0xFF; */
return insn->n;
}
@@ -624,11 +586,6 @@ static int s526_dio_insn_config(struct comedi_device *dev,
int chan = CR_CHAN(insn->chanspec);
int group, mask;
- /* The input or output configuration of each digital line is
- * configured by a special insn_config instruction. chanspec
- * contains the channel to be changed, and data[0] contains the
- * value COMEDI_INPUT or COMEDI_OUTPUT. */
-
group = chan >> 2;
mask = 0xF << (group << 2);
switch (data[0]) {
@@ -682,33 +639,22 @@ static int s526_attach(struct comedi_device *dev, struct comedi_devconfig *it)
/* GENERAL-PURPOSE COUNTER/TIME (GPCT) */
s->type = COMEDI_SUBD_COUNTER;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE | SDF_LSAMPL;
- /* KG: What does SDF_LSAMPL (see multiq3.c) mean? */
s->n_chan = board->gpct_chans;
s->maxdata = 0x00ffffff; /* 24 bit counter */
s->insn_read = s526_gpct_rinsn;
s->insn_config = s526_gpct_insn_config;
s->insn_write = s526_gpct_winsn;
- /* Command are not implemented yet, however they are necessary to
- allocate the necessary memory for the comedi_async struct (used
- to trigger the GPCT in case of pulsegenerator function */
- /* s->do_cmd = s526_gpct_cmd; */
- /* s->do_cmdtest = s526_gpct_cmdtest; */
- /* s->cancel = s526_gpct_cancel; */
-
s = &dev->subdevices[1];
- /* dev->read_subdev=s; */
/* analog input subdevice */
s->type = COMEDI_SUBD_AI;
- /* we support differential */
s->subdev_flags = SDF_READABLE | SDF_DIFF;
/* channels 0 to 7 are the regular differential inputs */
/* channel 8 is "reference 0" (+10V), channel 9 is "reference 1" (0V) */
s->n_chan = 10;
s->maxdata = 0xffff;
s->range_table = &range_bipolar10;
- s->len_chanlist = 16; /* This is the maximum chanlist length that
- the board can handle */
+ s->len_chanlist = 16;
s->insn_read = s526_ai_rinsn;
s->insn_config = s526_ai_insn_config;
--
1.7.11
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