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staging: comedi: amplc_pci230: use comedi_timeout() 

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 11:49:31 -07:00 committed by Greg Kroah-Hartman
parent 5cc0387c19
commit 0883fcab44
1 changed files with 18 additions and 14 deletions
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32
drivers/staging/comedi/drivers/amplc_pci230.c
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@ -799,19 +799,29 @@ static void pci230_cancel_ct(struct comedi_device *dev, unsigned int ct)
/* Counter ct, 8254 mode 1, initial count not written. */
}
/*
* COMEDI_SUBD_AI instruction;
*/
static int pci230_ai_eoc(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned long context)
{
unsigned int status;
status = inw(dev->iobase + PCI230_ADCCON);
if ((status & PCI230_ADC_FIFO_EMPTY) == 0)
return 0;
return -EBUSY;
}
static int pci230_ai_rinsn(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_insn *insn,
unsigned int *data)
{
struct pci230_private *devpriv = dev->private;
unsigned int n, i;
unsigned int n;
unsigned int chan, range, aref;
unsigned int gainshift;
unsigned int status;
unsigned short adccon, adcen;
int ret;
/* Unpack channel and range. */
chan = CR_CHAN(insn->chanspec);
@ -883,17 +893,11 @@ static int pci230_ai_rinsn(struct comedi_device *dev,
i8254_set_mode(devpriv->iobase1 + PCI230_Z2_CT_BASE, 0, 2,
I8254_MODE1);
#define TIMEOUT 100
/* wait for conversion to end */
for (i = 0; i < TIMEOUT; i++) {
status = inw(dev->iobase + PCI230_ADCCON);
if (!(status & PCI230_ADC_FIFO_EMPTY))
break;
udelay(1);
}
if (i == TIMEOUT) {
ret = comedi_timeout(dev, s, insn, pci230_ai_eoc, 0);
if (ret) {
dev_err(dev->class_dev, "timeout\n");
return -ETIMEDOUT;
return ret;
}
/* read data */