staging: comedi: cb_pcimdas: refactor iobase addresses

This driver uses three iobase addresses, found in PCI bars 2, 3, and 4.
Currently, the address in PCI bar 2 is saved in the comedi_device as
the 'iobase', the PCI bar 3 address is saved in the private data as
'BADR3' and the one in PCI bar 4 is just passed to subdev_8255_init()
as the 'iobase' parameter.

Flip the saving of the PCI bar 2 and 4 base addresses. Save the address
from PCI bar 2 in the private data as the 'daqio' and the address from
PCI bar 4 in the comedi_device as the 'iobase'.

This will help with some cleanup of the 8255 module.

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/cb_pcimdas.c b/drivers/staging/comedi/drivers/cb_pcimdas.c
index ccb9c72..d049a7f 100644 (file)
--- a/drivers/staging/comedi/drivers/cb_pcimdas.c
+++ b/drivers/staging/comedi/drivers/cb_pcimdas.c
@@ -77,6 +77,7 @@ See http://www.mccdaq.com/PDFs/Manuals/pcim-das1602-16.pdf for more details.
  */
 struct cb_pcimdas_private {
        /* base addresses */
+       unsigned long daqio;
        unsigned long BADR3;
 
        /* Used for AO readback */
@@ -143,7 +144,7 @@ static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
        /* convert n samples */
        for (n = 0; n < insn->n; n++) {
                /* trigger conversion */
-               outw(0, dev->iobase + 0);
+               outw(0, devpriv->daqio + 0);
 
                /* wait for conversion to end */
                ret = comedi_timeout(dev, s, insn, cb_pcimdas_ai_eoc, 0);
@@ -151,7 +152,7 @@ static int cb_pcimdas_ai_rinsn(struct comedi_device *dev,
                        return ret;
 
                /* read data */
-               data[n] = inw(dev->iobase + 0);
+               data[n] = inw(devpriv->daqio + 0);
        }
 
        /* return the number of samples read/written */
@@ -171,10 +172,10 @@ static int cb_pcimdas_ao_winsn(struct comedi_device *dev,
        for (i = 0; i < insn->n; i++) {
                switch (chan) {
                case 0:
-                       outw(data[i] & 0x0FFF, dev->iobase + DAC0_OFFSET);
+                       outw(data[i] & 0x0FFF, devpriv->daqio + DAC0_OFFSET);
                        break;
                case 1:
-                       outw(data[i] & 0x0FFF, dev->iobase + DAC1_OFFSET);
+                       outw(data[i] & 0x0FFF, devpriv->daqio + DAC1_OFFSET);
                        break;
                default:
                        return -1;
@@ -208,7 +209,6 @@ static int cb_pcimdas_auto_attach(struct comedi_device *dev,
        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
        struct cb_pcimdas_private *devpriv;
        struct comedi_subdevice *s;
-       unsigned long iobase_8255;
        int ret;
 
        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
@@ -219,9 +219,9 @@ static int cb_pcimdas_auto_attach(struct comedi_device *dev,
        if (ret)
                return ret;
 
-       dev->iobase = pci_resource_start(pcidev, 2);
+       devpriv->daqio = pci_resource_start(pcidev, 2);
        devpriv->BADR3 = pci_resource_start(pcidev, 3);
-       iobase_8255 = pci_resource_start(pcidev, 4);
+       dev->iobase = pci_resource_start(pcidev, 4);
 
        ret = comedi_alloc_subdevices(dev, 3);
        if (ret)
@@ -252,7 +252,7 @@ static int cb_pcimdas_auto_attach(struct comedi_device *dev,
 
        s = &dev->subdevices[2];
        /* digital i/o subdevice */
-       ret = subdev_8255_init(dev, s, NULL, iobase_8255);
+       ret = subdev_8255_init(dev, s, NULL, dev->iobase);
        if (ret)
                return ret;