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comedi: amplc_dio200_common: Refactor register access functions

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The `dio200_read8()`, `dio200_write8()`, `dio200_read32()` and
`dio200_write32()` functions apply a right-shift to the register offset
for some devices and then perform the actual register access.  Factor
the register access part out to new functions `dio200___read8()`,
`dio200___write8()`, `dio200___read32()`, and `dio200___write32()`.
This will reduce duplicated code in a subsequent patch that will
conditionally compile support for port I/O as part of the `HAS_IOPORT`
changes.

Cc: Arnd Bergmann <arnd@kernel.org>
Cc: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20230913170712.111719-12-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2023-09-13 18:07:10 +01:00 committed by Greg Kroah-Hartman
parent 772dcada0e
commit a3f2b80847
1 changed files with 38 additions and 14 deletions
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52
drivers/comedi/drivers/amplc_dio200_common.c
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@ -86,6 +86,40 @@ struct dio200_subdev_intr {
unsigned int active:1;
};
static unsigned char dio200___read8(struct comedi_device *dev,
unsigned int offset)
{
if (dev->mmio)
return readb(dev->mmio + offset);
return inb(dev->iobase + offset);
}
static void dio200___write8(struct comedi_device *dev,
unsigned int offset, unsigned char val)
{
if (dev->mmio)
writeb(val, dev->mmio + offset);
else
outb(val, dev->iobase + offset);
}
static unsigned int dio200___read32(struct comedi_device *dev,
unsigned int offset)
{
if (dev->mmio)
return readl(dev->mmio + offset);
return inl(dev->iobase + offset);
}
static void dio200___write32(struct comedi_device *dev,
unsigned int offset, unsigned int val)
{
if (dev->mmio)
writel(val, dev->mmio + offset);
else
outl(val, dev->iobase + offset);
}
static unsigned char dio200_read8(struct comedi_device *dev,
unsigned int offset)
{
@ -94,9 +128,7 @@ static unsigned char dio200_read8(struct comedi_device *dev,
if (board->is_pcie)
offset <<= 3;
if (dev->mmio)
return readb(dev->mmio + offset);
return inb(dev->iobase + offset);
return dio200___read8(dev, offset);
}
static void dio200_write8(struct comedi_device *dev,
@ -107,10 +139,7 @@ static void dio200_write8(struct comedi_device *dev,
if (board->is_pcie)
offset <<= 3;
if (dev->mmio)
writeb(val, dev->mmio + offset);
else
outb(val, dev->iobase + offset);
dio200___write8(dev, offset, val);
}
static unsigned int dio200_read32(struct comedi_device *dev,
@ -121,9 +150,7 @@ static unsigned int dio200_read32(struct comedi_device *dev,
if (board->is_pcie)
offset <<= 3;
if (dev->mmio)
return readl(dev->mmio + offset);
return inl(dev->iobase + offset);
return dio200___read32(dev, offset);
}
static void dio200_write32(struct comedi_device *dev,
@ -134,10 +161,7 @@ static void dio200_write32(struct comedi_device *dev,
if (board->is_pcie)
offset <<= 3;
if (dev->mmio)
writel(val, dev->mmio + offset);
else
outl(val, dev->iobase + offset);
dio200___write32(dev, offset, val);
}
static unsigned int dio200_subdev_8254_offset(struct comedi_device *dev,