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staging: comedi: das08: use comedi_timeout()

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Use comedi_timeout() to wait for the analog input end-of-conversion.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2014-02-10 11:49:18 -07:00 committed by Greg Kroah-Hartman
parent 6976a449cd
commit c3ce086e15
1 changed files with 18 additions and 8 deletions
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26
drivers/staging/comedi/drivers/das08.c
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@ -201,17 +201,29 @@ static const int *const das08_gainlists[] = {
das08_pgm_gainlist, das08_pgm_gainlist,
}; };
#define TIMEOUT 100000 static int das08_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned int status;
status = inb(dev->iobase + DAS08_STATUS);
if ((status & DAS08_EOC) == 0)
return 0;
return -EBUSY;
}
static int das08_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, static int das08_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data) struct comedi_insn *insn, unsigned int *data)
{ {
const struct das08_board_struct *thisboard = comedi_board(dev); const struct das08_board_struct *thisboard = comedi_board(dev);
struct das08_private_struct *devpriv = dev->private; struct das08_private_struct *devpriv = dev->private;
int i, n; int n;
int chan; int chan;
int range; int range;
int lsb, msb; int lsb, msb;
int ret;
chan = CR_CHAN(insn->chanspec); chan = CR_CHAN(insn->chanspec);
range = CR_RANGE(insn->chanspec); range = CR_RANGE(insn->chanspec);
@ -244,14 +256,12 @@ static int das08_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
/* trigger conversion */ /* trigger conversion */
outb_p(0, dev->iobase + DAS08_TRIG_12BIT); outb_p(0, dev->iobase + DAS08_TRIG_12BIT);
for (i = 0; i < TIMEOUT; i++) { ret = comedi_timeout(dev, s, insn, das08_ai_eoc, 0);
if (!(inb(dev->iobase + DAS08_STATUS) & DAS08_EOC)) if (ret) {
break;
}
if (i == TIMEOUT) {
dev_err(dev->class_dev, "timeout\n"); dev_err(dev->class_dev, "timeout\n");
return -ETIME; return ret;
} }
msb = inb(dev->iobase + DAS08_MSB); msb = inb(dev->iobase + DAS08_MSB);
lsb = inb(dev->iobase + DAS08_LSB); lsb = inb(dev->iobase + DAS08_LSB);
if (thisboard->ai_encoding == das08_encode12) { if (thisboard->ai_encoding == das08_encode12) {