forked from Minki/linux
staging: comedi: ni_at_a2150: 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>
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@ -488,13 +488,25 @@ static int a2150_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
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return 0;
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}
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static int a2150_ai_eoc(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned long context)
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{
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unsigned int status;
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status = inw(dev->iobase + STATUS_REG);
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if (status & FNE_BIT)
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return 0;
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return -EBUSY;
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}
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static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data)
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{
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struct a2150_private *devpriv = dev->private;
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unsigned int i, n;
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static const int timeout = 100000;
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static const int filter_delay = 36;
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unsigned int n;
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int ret;
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/* clear fifo and reset triggering circuitry */
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outw(0, dev->iobase + FIFO_RESET_REG);
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@ -524,30 +536,24 @@ static int a2150_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
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* there is a 35.6 sample delay for data to get through the
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* antialias filter
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*/
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for (n = 0; n < filter_delay; n++) {
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for (i = 0; i < timeout; i++) {
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if (inw(dev->iobase + STATUS_REG) & FNE_BIT)
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break;
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udelay(1);
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}
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if (i == timeout) {
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for (n = 0; n < 36; n++) {
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ret = comedi_timeout(dev, s, insn, a2150_ai_eoc, 0);
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if (ret) {
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comedi_error(dev, "timeout");
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return -ETIME;
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return ret;
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}
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inw(dev->iobase + FIFO_DATA_REG);
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}
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/* read data */
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for (n = 0; n < insn->n; n++) {
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for (i = 0; i < timeout; i++) {
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if (inw(dev->iobase + STATUS_REG) & FNE_BIT)
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break;
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udelay(1);
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}
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if (i == timeout) {
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ret = comedi_timeout(dev, s, insn, a2150_ai_eoc, 0);
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if (ret) {
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comedi_error(dev, "timeout");
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return -ETIME;
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return ret;
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}
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data[n] = inw(dev->iobase + FIFO_DATA_REG);
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data[n] ^= 0x8000;
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}
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