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Message-ID: <201208151732.30056.hartleys@visionengravers.com>
Date: Wed, 15 Aug 2012 17:32:29 -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 6/7] staging: comedi: contec_pci_dio: 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 to 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/contec_pci_dio.c | 97 +++++++++----------------
1 file changed, 35 insertions(+), 62 deletions(-)
diff --git a/drivers/staging/comedi/drivers/contec_pci_dio.c b/drivers/staging/comedi/drivers/contec_pci_dio.c
index 4b47fa0..b7b60d3 100644
--- a/drivers/staging/comedi/drivers/contec_pci_dio.c
+++ b/drivers/staging/comedi/drivers/contec_pci_dio.c
@@ -27,11 +27,7 @@ Author: Stefano Rivoir <s.rivoir@....it>
Updated: Wed, 27 Jun 2007 13:00:06 +0100
Status: works
-Configuration Options:
- [0] - PCI bus of device (optional)
- [1] - PCI slot of device (optional)
- If bus/slot is not specified, the first supported
- PCI device found will be used.
+Configuration Options: not applicable, uses comedi PCI auto config
*/
#include "../comedidev.h"
@@ -66,76 +62,53 @@ static int contec_di_insn_bits(struct comedi_device *dev,
return insn->n;
}
-static struct pci_dev *contec_find_pci_dev(struct comedi_device *dev,
- struct comedi_devconfig *it)
+static int contec_attach_pci(struct comedi_device *dev,
+ struct pci_dev *pcidev)
{
- struct pci_dev *pcidev = NULL;
- int bus = it->options[0];
- int slot = it->options[1];
-
- 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_CONTEC ||
- pcidev->device != PCI_DEVICE_ID_PIO1616L)
- continue;
-
- return pcidev;
- }
- dev_err(dev->class_dev,
- "No supported board found! (req. bus %d, slot %d)\n",
- bus, slot);
- return NULL;
-}
-
-static int contec_attach(struct comedi_device *dev, struct comedi_devconfig *it)
-{
- struct pci_dev *pcidev;
struct comedi_subdevice *s;
int ret;
- printk("comedi%d: contec: ", dev->minor);
-
- ret = comedi_alloc_subdevices(dev, 2);
- if (ret)
- return ret;
-
- pcidev = contec_find_pci_dev(dev, it);
- if (!pcidev)
- return -EIO;
comedi_set_hw_dev(dev, &pcidev->dev);
+
dev->board_name = dev->driver->driver_name;
- if (comedi_pci_enable(pcidev, "contec_pci_dio")) {
- printk("error enabling PCI device and request regions!\n");
- return -EIO;
- }
+ ret = comedi_pci_enable(pcidev, dev->board_name);
+ if (ret)
+ return ret;
dev->iobase = pci_resource_start(pcidev, 0);
- printk(" base addr %lx ", dev->iobase);
- s = dev->subdevices + 0;
+ ret = comedi_alloc_subdevices(dev, 2);
+ if (ret)
+ return ret;
- s->type = COMEDI_SUBD_DI;
- s->subdev_flags = SDF_READABLE;
- s->n_chan = 16;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = contec_di_insn_bits;
+ s = dev->subdevices + 0;
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = contec_di_insn_bits;
s = dev->subdevices + 1;
- s->type = COMEDI_SUBD_DO;
- s->subdev_flags = SDF_WRITABLE;
- s->n_chan = 16;
- s->maxdata = 1;
- s->range_table = &range_digital;
- s->insn_bits = contec_do_insn_bits;
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = contec_do_insn_bits;
+
+ dev_info(dev->class_dev, "%s attached\n", dev->board_name);
- printk("attached\n");
+ return 0;
+}
+
+static int contec_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 contec_detach(struct comedi_device *dev)
@@ -145,7 +118,6 @@ static void contec_detach(struct comedi_device *dev)
if (pcidev) {
if (dev->iobase)
comedi_pci_disable(pcidev);
- pci_dev_put(pcidev);
}
}
@@ -153,6 +125,7 @@ static struct comedi_driver contec_pci_dio_driver = {
.driver_name = "contec_pci_dio",
.module = THIS_MODULE,
.attach = contec_attach,
+ .attach_pci = contec_attach_pci,
.detach = contec_detach,
};
--
1.7.11
--
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