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Date: Tue, 14 Aug 2012 18:23:49 -0700
From: H Hartley Sweeten <hartleys@...ionengravers.com>
To: Linux Kernel <linux-kernel@...r.kernel.org>
CC: <devel@...verdev.osuosl.org>, <abbotti@....co.uk>,
<gregkh@...uxfoundation.org>
Subject: [PATCH 2/7] staging: comedi: dnya_pci10xx: use attach_pci callback
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 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.
Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
Cc: Ian Abbott <abbotti@....co.uk>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/staging/comedi/drivers/dyna_pci10xx.c | 88 +++++++++++----------------
1 file changed, 35 insertions(+), 53 deletions(-)
diff --git a/drivers/staging/comedi/drivers/dyna_pci10xx.c b/drivers/staging/comedi/drivers/dyna_pci10xx.c
index 7884a94..15048aa 100644
--- a/drivers/staging/comedi/drivers/dyna_pci10xx.c
+++ b/drivers/staging/comedi/drivers/dyna_pci10xx.c
@@ -227,73 +227,49 @@ static int dyna_pci10xx_do_insn_bits(struct comedi_device *dev,
return insn->n;
}
-static struct pci_dev *dyna_pci10xx_find_pci_dev(struct comedi_device *dev,
- struct comedi_devconfig *it)
+static const void *dyna_pci10xx_find_boardinfo(struct comedi_device *dev,
+ struct pci_dev *pcidev)
{
- struct pci_dev *pcidev = NULL;
- int bus = it->options[0];
- int slot = it->options[1];
+ const struct boardtype *thisboard;
int i;
- for_each_pci_dev(pcidev) {
- if (bus || slot) {
- if (bus != pcidev->bus->number ||
- slot != PCI_SLOT(pcidev->devfn))
- continue;
- }
- if (pcidev->vendor != PCI_VENDOR_ID_DYNALOG)
- continue;
-
- for (i = 0; i < ARRAY_SIZE(boardtypes); ++i) {
- if (pcidev->device != boardtypes[i].device_id)
- continue;
-
- dev->board_ptr = &boardtypes[i];
- return pcidev;
- }
+ for (i = 0; i < ARRAY_SIZE(boardtypes); ++i) {
+ thisboard = &boardtypes[i];
+ if (pcidev->device != thisboard->device_id)
+ return thisboard;
}
- dev_err(dev->class_dev,
- "No supported board found! (req. bus %d, slot %d)\n",
- bus, slot);
return NULL;
}
-static int dyna_pci10xx_attach(struct comedi_device *dev,
- struct comedi_devconfig *it)
+static int dyna_pci10xx_attach_pci(struct comedi_device *dev,
+ struct pci_dev *pcidev)
{
const struct boardtype *thisboard;
struct dyna_pci10xx_private *devpriv;
- struct pci_dev *pcidev;
struct comedi_subdevice *s;
int ret;
- ret = alloc_private(dev, sizeof(*devpriv));
- if (ret)
- return ret;
- devpriv = dev->private;
-
- pcidev = dyna_pci10xx_find_pci_dev(dev, it);
- if (!pcidev)
- return -EIO;
comedi_set_hw_dev(dev, &pcidev->dev);
- thisboard = comedi_board(dev);
+ thisboard = dyna_pci10xx_find_boardinfo(dev, pcidev);
+ if (!thisboard)
+ return -ENODEV;
+ dev->board_ptr = thisboard;
dev->board_name = thisboard->name;
- dev->irq = 0;
-
- if (comedi_pci_enable(pcidev, DRV_NAME)) {
- printk(KERN_ERR "comedi: dyna_pci10xx: "
- "failed to enable PCI device and request regions!");
- return -EIO;
- }
-
- mutex_init(&devpriv->mutex);
- printk(KERN_INFO "comedi: dyna_pci10xx: device found!\n");
+ ret = alloc_private(dev, sizeof(*devpriv));
+ if (ret)
+ return ret;
+ devpriv = dev->private;
+ ret = comedi_pci_enable(pcidev, dev->board_name);
+ if (ret)
+ return ret;
dev->iobase = pci_resource_start(pcidev, 2);
devpriv->BADR3 = pci_resource_start(pcidev, 3);
+ mutex_init(&devpriv->mutex);
+
ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;
@@ -339,10 +315,19 @@ static int dyna_pci10xx_attach(struct comedi_device *dev,
s->state = 0;
s->insn_bits = dyna_pci10xx_do_insn_bits;
- printk(KERN_INFO "comedi: dyna_pci10xx: %s - device setup completed!\n",
- thisboard->name);
+ dev_info(dev->class_dev, "%s: %s attached\n",
+ dev->driver->driver_name, dev->board_name);
+
+ return 0;
+}
+
+static int dyna_pci10xx_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 1;
+ return -ENOSYS;
}
static void dyna_pci10xx_detach(struct comedi_device *dev)
@@ -355,7 +340,6 @@ static void dyna_pci10xx_detach(struct comedi_device *dev)
if (pcidev) {
if (dev->iobase)
comedi_pci_disable(pcidev);
- pci_dev_put(pcidev);
}
}
@@ -363,10 +347,8 @@ static struct comedi_driver dyna_pci10xx_driver = {
.driver_name = "dyna_pci10xx",
.module = THIS_MODULE,
.attach = dyna_pci10xx_attach,
+ .attach_pci = dyna_pci10xx_attach_pci,
.detach = dyna_pci10xx_detach,
- .board_name = &boardtypes[0].name,
- .offset = sizeof(struct boardtype),
- .num_names = ARRAY_SIZE(boardtypes),
};
static int __devinit dyna_pci10xx_pci_probe(struct pci_dev *dev,
--
1.7.11
--
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