Convert this PCI driver to use the comedi PCI auto config attach mechanism
by adding an attach_pci callback function. Since the driver does not require
any external configuration options, disable the legacy attach by making the
attach callback simply return -ENOSYS. This removes the need to walk the pci
bus to find the pci_dev and the need for the pci_dev_put() in the detach.
For aesthetic reasons, rename the local variable 'thisboard' to 'boardinfo'.
Signed-off-by: H Hartley Sweeten
Cc: Ian Abbott
Cc: Greg Kroah-Hartman
---
drivers/staging/comedi/drivers/adl_pci6208.c | 78 +++++++++++-----------------
1 file changed, 30 insertions(+), 48 deletions(-)
diff --git a/drivers/staging/comedi/drivers/adl_pci6208.c b/drivers/staging/comedi/drivers/adl_pci6208.c
index 3bec0f6..6d887f7 100644
--- a/drivers/staging/comedi/drivers/adl_pci6208.c
+++ b/drivers/staging/comedi/drivers/adl_pci6208.c
@@ -33,8 +33,7 @@ Author: nsyeow
Updated: Fri, 30 Jan 2004 14:44:27 +0800
Status: untested
-Configuration Options:
- none
+Configuration Options: not applicable, uses PCI auto config
References:
- ni_660x.c
@@ -155,67 +154,41 @@ static int pci6208_dio_insn_config(struct comedi_device *dev,
return insn->n;
}
-static struct pci_dev *pci6208_find_device(struct comedi_device *dev,
- struct comedi_devconfig *it)
+static const void *pci6208_find_boardinfo(struct comedi_device *dev,
+ struct pci_dev *pcidev)
{
- const struct pci6208_board *thisboard;
- struct pci_dev *pci_dev = NULL;
- int bus = it->options[0];
- int slot = it->options[1];
+ const struct pci6208_board *boardinfo;
int i;
- for_each_pci_dev(pci_dev) {
- if (pci_dev->vendor != PCI_VENDOR_ID_ADLINK)
- continue;
- for (i = 0; i < ARRAY_SIZE(pci6208_boards); i++) {
- thisboard = &pci6208_boards[i];
- if (thisboard->dev_id != pci_dev->device)
- continue;
- /* was a particular bus/slot requested? */
- if (bus || slot) {
- /* are we on the wrong bus/slot? */
- if (pci_dev->bus->number != bus ||
- PCI_SLOT(pci_dev->devfn) != slot)
- continue;
- }
- dev_dbg(dev->class_dev,
- "Found %s on bus %d, slot, %d, irq=%d\n",
- thisboard->name,
- pci_dev->bus->number,
- PCI_SLOT(pci_dev->devfn),
- pci_dev->irq);
- dev->board_ptr = thisboard;
- return pci_dev;
- }
+ for (i = 0; i < ARRAY_SIZE(pci6208_boards); i++) {
+ boardinfo = &pci6208_boards[i];
+ if (boardinfo->dev_id == pcidev->device)
+ return boardinfo;
}
- dev_err(dev->class_dev,
- "No supported board found! (req. bus %d, slot %d)\n",
- bus, slot);
return NULL;
}
-static int pci6208_attach(struct comedi_device *dev,
- struct comedi_devconfig *it)
+static int pci6208_attach_pci(struct comedi_device *dev,
+ struct pci_dev *pcidev)
{
- const struct pci6208_board *thisboard;
+ const struct pci6208_board *boardinfo;
struct pci6208_private *devpriv;
- struct pci_dev *pcidev;
struct comedi_subdevice *s;
int ret;
+ comedi_set_hw_dev(dev, &pcidev->dev);
+
+ boardinfo = pci6208_find_boardinfo(dev, pcidev);
+ if (!boardinfo)
+ return -ENODEV;
+ dev->board_ptr = boardinfo;
+ dev->board_name = boardinfo->name;
+
ret = alloc_private(dev, sizeof(*devpriv));
if (ret < 0)
return ret;
devpriv = dev->private;
- pcidev = pci6208_find_device(dev, it);
- if (!pcidev)
- return -EIO;
- comedi_set_hw_dev(dev, &pcidev->dev);
- thisboard = comedi_board(dev);
-
- dev->board_name = thisboard->name;
-
ret = comedi_pci_enable(pcidev, dev->driver->driver_name);
if (ret) {
dev_err(dev->class_dev,
@@ -232,7 +205,7 @@ static int pci6208_attach(struct comedi_device *dev,
/* analog output subdevice */
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
- s->n_chan = thisboard->ao_chans;
+ s->n_chan = boardinfo->ao_chans;
s->maxdata = 0xffff;
s->range_table = &range_bipolar10;
s->insn_write = pci6208_ao_winsn;
@@ -257,6 +230,15 @@ static int pci6208_attach(struct comedi_device *dev,
return 0;
}
+static int pci6208_attach(struct comedi_device *dev,
+ struct comedi_devconfig *it)
+{
+ dev_warn(dev->class_dev,
+ "This driver does not support attach using comedi_config\n");
+
+ return -ENOSYS;
+}
+
static void pci6208_detach(struct comedi_device *dev)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
@@ -264,7 +246,6 @@ static void pci6208_detach(struct comedi_device *dev)
if (pcidev) {
if (dev->iobase)
comedi_pci_disable(pcidev);
- pci_dev_put(pcidev);
}
}
@@ -272,6 +253,7 @@ static struct comedi_driver adl_pci6208_driver = {
.driver_name = "adl_pci6208",
.module = THIS_MODULE,
.attach = pci6208_attach,
+ .attach_pci = pci6208_attach_pci,
.detach = pci6208_detach,
};
--
1.7.11
--
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