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staging: comedi: das16: add a 'can_burst' flag to the private data 

If the boardinfo 'size' is > 0x400 it indicates that the board has
additional registers that allow bursting of analog input data.

To better indicate this add a flag to the private data.

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 2013-07-29 13:57:18 -07:00 committed by Greg Kroah-Hartman
parent 6f63840447
commit 96334bfebf
1 changed files with 12 additions and 19 deletions
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31
drivers/staging/comedi/drivers/das16.c
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@ -373,6 +373,7 @@ struct das16_private_struct {
short timer_running;
unsigned long extra_iobase;
unsigned int can_burst:1;
};
static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
@ -389,15 +390,13 @@ static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
mask = TRIG_FOLLOW;
/* if board supports burst mode */
if (board->size > 0x400)
if (devpriv->can_burst)
mask |= TRIG_TIMER | TRIG_EXT;
err |= cfc_check_trigger_src(&cmd->scan_begin_src, mask);
tmp = cmd->convert_src;
mask = TRIG_TIMER | TRIG_EXT;
/* if board supports burst mode */
if (board->size > 0x400)
if (devpriv->can_burst)
mask |= TRIG_NOW;
err |= cfc_check_trigger_src(&cmd->convert_src, mask);
@ -534,8 +533,7 @@ static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
devpriv->adc_byte_count =
cmd->stop_arg * cmd->chanlist_len * sizeof(uint16_t);
/* disable conversions for das1600 mode */
if (board->size > 0x400)
if (devpriv->can_burst)
outb(DAS1600_CONV_DISABLE, dev->iobase + DAS1600_CONV);
/* set scan limits */
@ -559,8 +557,7 @@ static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
/* enable counters */
byte = 0;
/* Enable burst mode if appropriate. */
if (board->size > 0x400) {
if (devpriv->can_burst) {
if (cmd->convert_src == TRIG_NOW) {
outb(DAS1600_BURST_VAL, dev->iobase + DAS1600_BURST);
/* set burst length */
@ -598,8 +595,7 @@ static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
devpriv->control_state |= INT_PACER;
outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
/* Enable conversions if using das1600 mode */
if (board->size > 0x400)
if (devpriv->can_burst)
outb(0, dev->iobase + DAS1600_CONV);
@ -608,7 +604,6 @@ static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
{
const struct das16_board *board = comedi_board(dev);
struct das16_private_struct *devpriv = dev->private;
unsigned long flags;
@ -624,11 +619,9 @@ static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
del_timer(&devpriv->timer);
}
/* disable burst mode */
if (board->size > 0x400)
if (devpriv->can_burst)
outb(0, dev->iobase + DAS1600_BURST);
spin_unlock_irqrestore(&dev->spinlock, flags);
return 0;
@ -955,6 +948,7 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
if (ret)
return ret;
devpriv->extra_iobase = dev->iobase + 0x400;
devpriv->can_burst = 1;
}
/* probe id bits to make sure they are consistent */
@ -964,13 +958,13 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
}
/* get master clock speed */
if (board->size < 0x400) {
if (devpriv->can_burst) {
das1600_mode_detect(dev);
} else {
if (it->options[3])
devpriv->clockbase = 1000 / it->options[3];
else
devpriv->clockbase = 1000; /* 1 MHz default */
} else {
das1600_mode_detect(dev);
}
/* initialize dma */
@ -1123,8 +1117,7 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
devpriv->control_state = DAS16_IRQ(dev->irq);
outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
/* turn on das1600 mode if available */
if (board->size > 0x400) {
if (devpriv->can_burst) {
outb(DAS1600_ENABLE_VAL, dev->iobase + DAS1600_ENABLE);
outb(0, dev->iobase + DAS1600_CONV);
outb(0, dev->iobase + DAS1600_BURST);