mirror of https://gitee.com/openkylin/linux.git
staging: comedi: adv_pci1723: tidy up pci1723_dio_insn_config()
For aesthetics, tidy this function up and use the register defines to remove the magic numbers. 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>
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@ -103,33 +103,24 @@ static int pci1723_ao_insn_write(struct comedi_device *dev,
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return insn->n;
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}
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/*
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digital i/o config/query
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*/
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static int pci1723_dio_insn_config(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data)
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struct comedi_insn *insn,
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unsigned int *data)
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{
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unsigned int chan = CR_CHAN(insn->chanspec);
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unsigned int mask;
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unsigned short mode;
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unsigned int mask = (chan < 8) ? 0x00ff : 0xff00;
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unsigned short mode = 0x0000; /* assume output */
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int ret;
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if (chan < 8)
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mask = 0x00ff;
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else
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mask = 0xff00;
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ret = comedi_dio_insn_config(dev, s, insn, data, mask);
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if (ret)
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return ret;
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/* update hardware DIO mode */
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mode = 0x0000; /* assume output */
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if (!(s->io_bits & 0x00ff))
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mode |= 0x0001; /* low byte input */
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mode |= PCI1723_DIO_CTRL_LDIO; /* low byte input */
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if (!(s->io_bits & 0xff00))
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mode |= 0x0002; /* high byte input */
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mode |= PCI1723_DIO_CTRL_HDIO; /* high byte input */
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outw(mode, dev->iobase + PCI1723_DIO_CTRL_REG);
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return insn->n;
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