staging: comedi: amplc_dio200: use the comedi_device 'mmio' member

The amplc_dio200_common module currently uses a union in the private
data to determine if the hardware uses port or memory mapped I/O.

Use the new 'mmio' member in the comedi_device for the ioremap'ed
base address and remove all the union code.

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>

diff --git a/drivers/staging/comedi/drivers/amplc_dio200.c b/drivers/staging/comedi/drivers/amplc_dio200.c
index dc1dee7..17d2e20 100644 (file)
--- a/drivers/staging/comedi/drivers/amplc_dio200.c
+++ b/drivers/staging/comedi/drivers/amplc_dio200.c
@@ -278,8 +278,7 @@ static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        ret = comedi_request_region(dev, it->options[0], thisboard->mainsize);
        if (ret)
                return ret;
-       devpriv->io.u.iobase = dev->iobase;
-       devpriv->io.regtype = io_regtype;
+
        return amplc_dio200_common_attach(dev, irq, 0);
 }
 

diff --git a/drivers/staging/comedi/drivers/amplc_dio200.h b/drivers/staging/comedi/drivers/amplc_dio200.h
index 43160b9..e0afe2c 100644 (file)
--- a/drivers/staging/comedi/drivers/amplc_dio200.h
+++ b/drivers/staging/comedi/drivers/amplc_dio200.h
@@ -27,18 +27,6 @@
 #define DIO200_IO_SIZE         0x20
 #define DIO200_PCIE_IO_SIZE    0x4000
 
-/*
- * Register region.
- */
-enum dio200_regtype { no_regtype = 0, io_regtype, mmio_regtype };
-struct dio200_region {
-       union {
-               unsigned long iobase;           /* I/O base address */
-               unsigned char __iomem *membase; /* mapped MMIO base address */
-       } u;
-       enum dio200_regtype regtype;
-};
-
 /*
  * Subdevice types.
  */
@@ -75,7 +63,6 @@ struct dio200_board {
  * Comedi device private data.
  */
 struct dio200_private {
-       struct dio200_region io;        /* Register region */
        int intr_sd;
 };
 

diff --git a/drivers/staging/comedi/drivers/amplc_dio200_common.c b/drivers/staging/comedi/drivers/amplc_dio200_common.c
index 4cf9e9e..f0d709e 100644 (file)
--- a/drivers/staging/comedi/drivers/amplc_dio200_common.c
+++ b/drivers/staging/comedi/drivers/amplc_dio200_common.c
@@ -151,13 +151,12 @@ static unsigned char dio200_read8(struct comedi_device *dev,
                                  unsigned int offset)
 {
        const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
 
        offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               return inb(devpriv->io.u.iobase + offset);
 
-       return readb(devpriv->io.u.membase + offset);
+       if (dev->mmio)
+               return readb(dev->mmio + offset);
+       return inb(dev->iobase + offset);
 }
 
 /*
@@ -167,13 +166,13 @@ static void dio200_write8(struct comedi_device *dev, unsigned int offset,
                          unsigned char val)
 {
        const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
 
        offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               outb(val, devpriv->io.u.iobase + offset);
+
+       if (dev->mmio)
+               writeb(val, dev->mmio + offset);
        else
-               writeb(val, devpriv->io.u.membase + offset);
+               outb(val, dev->iobase + offset);
 }
 
 /*
@@ -183,13 +182,12 @@ static unsigned int dio200_read32(struct comedi_device *dev,
                                  unsigned int offset)
 {
        const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
 
        offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               return inl(devpriv->io.u.iobase + offset);
 
-       return readl(devpriv->io.u.membase + offset);
+       if (dev->mmio)
+               return readl(dev->mmio + offset);
+       return inl(dev->iobase + offset);
 }
 
 /*
@@ -199,13 +197,13 @@ static void dio200_write32(struct comedi_device *dev, unsigned int offset,
                           unsigned int val)
 {
        const struct dio200_board *thisboard = comedi_board(dev);
-       struct dio200_private *devpriv = dev->private;
 
        offset <<= thisboard->mainshift;
-       if (devpriv->io.regtype == io_regtype)
-               outl(val, devpriv->io.u.iobase + offset);
+
+       if (dev->mmio)
+               writel(val, dev->mmio + offset);
        else
-               writel(val, devpriv->io.u.membase + offset);
+               outl(val, dev->iobase + offset);
 }
 
 /*

diff --git a/drivers/staging/comedi/drivers/amplc_dio200_pci.c b/drivers/staging/comedi/drivers/amplc_dio200_pci.c
index 1954c1b..fbf0568 100644 (file)
--- a/drivers/staging/comedi/drivers/amplc_dio200_pci.c
+++ b/drivers/staging/comedi/drivers/amplc_dio200_pci.c
@@ -387,16 +387,14 @@ static int dio200_pci_auto_attach(struct comedi_device *dev,
                return -EINVAL;
        }
        if (pci_resource_flags(pci_dev, bar) & IORESOURCE_MEM) {
-               devpriv->io.u.membase = pci_ioremap_bar(pci_dev, bar);
-               if (!devpriv->io.u.membase) {
+               dev->mmio = pci_ioremap_bar(pci_dev, bar);
+               if (!dev->mmio) {
                        dev_err(dev->class_dev,
                                "error! cannot remap registers\n");
                        return -ENOMEM;
                }
-               devpriv->io.regtype = mmio_regtype;
        } else {
-               devpriv->io.u.iobase = pci_resource_start(pci_dev, bar);
-               devpriv->io.regtype = io_regtype;
+               dev->iobase = pci_resource_start(pci_dev, bar);
        }
        switch (context_model) {
        case pcie215_model:
@@ -414,11 +412,9 @@ static int dio200_pci_auto_attach(struct comedi_device *dev,
 
 static void dio200_pci_detach(struct comedi_device *dev)
 {
-       struct dio200_private *devpriv = dev->private;
-
        amplc_dio200_common_detach(dev);
-       if (devpriv && devpriv->io.regtype == mmio_regtype)
-               iounmap(devpriv->io.u.membase);
+       if (dev->mmio)
+               iounmap(dev->mmio);
        comedi_pci_disable(dev);
 }