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Date: Thu, 16 Aug 2012 19:55:43 -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 35/35] staging: comedi: ke_counter: 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, and
the legacy 'attach' callback is now optional, remove it.
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/ke_counter.c | 83 +++++++++--------------------
1 file changed, 25 insertions(+), 58 deletions(-)
diff --git a/drivers/staging/comedi/drivers/ke_counter.c b/drivers/staging/comedi/drivers/ke_counter.c
index d4e9292..a24e932 100644
--- a/drivers/staging/comedi/drivers/ke_counter.c
+++ b/drivers/staging/comedi/drivers/ke_counter.c
@@ -28,11 +28,7 @@ Author: Michael Hillmann
Updated: Mon, 14 Apr 2008 15:42:42 +0100
Status: tested
-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 PCI auto config
This driver is a simple driver to read the counter values from
Kolter Electronic PCI Counter Card.
@@ -111,72 +107,43 @@ static int cnt_rinsn(struct comedi_device *dev,
return 1;
}
-static struct pci_dev *cnt_find_pci_dev(struct comedi_device *dev,
- struct comedi_devconfig *it)
+static const void *cnt_find_boardinfo(struct comedi_device *dev,
+ struct pci_dev *pcidev)
{
const struct cnt_board_struct *board;
- struct pci_dev *pcidev = NULL;
- int bus = it->options[0];
- int slot = it->options[1];
int i;
- /* Probe the device to determine what device in the series it is. */
- for_each_pci_dev(pcidev) {
- if (bus || slot) {
- if (pcidev->bus->number != bus ||
- PCI_SLOT(pcidev->devfn) != slot)
- continue;
- }
- if (pcidev->vendor != PCI_VENDOR_ID_KOLTER)
- continue;
-
- for (i = 0; i < ARRAY_SIZE(cnt_boards); i++) {
- board = &cnt_boards[i];
- if (board->device_id != pcidev->device)
- continue;
-
- dev->board_ptr = board;
- return pcidev;
- }
+ for (i = 0; i < ARRAY_SIZE(cnt_boards); i++) {
+ board = &cnt_boards[i];
+ if (board->device_id == pcidev->device)
+ return board;
}
- dev_err(dev->class_dev,
- "No supported board found! (req. bus %d, slot %d)\n",
- bus, slot);
return NULL;
}
-static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+static int cnt_attach_pci(struct comedi_device *dev,
+ struct pci_dev *pcidev)
{
const struct cnt_board_struct *board;
- struct pci_dev *pcidev;
struct comedi_subdevice *subdevice;
- unsigned long io_base;
- int error;
+ int ret;
- pcidev = cnt_find_pci_dev(dev, it);
- if (!pcidev)
- return -EIO;
comedi_set_hw_dev(dev, &pcidev->dev);
- board = comedi_board(dev);
+ board = cnt_find_boardinfo(dev, pcidev);
+ if (!board)
+ return -ENODEV;
+ dev->board_ptr = board;
dev->board_name = board->name;
- /* enable PCI device and request regions */
- error = comedi_pci_enable(pcidev, CNT_DRIVER_NAME);
- if (error < 0) {
- printk(KERN_WARNING "comedi%d: "
- "failed to enable PCI device and request regions!\n",
- dev->minor);
- return error;
- }
-
- /* read register base address [PCI_BASE_ADDRESS #0] */
- io_base = pci_resource_start(pcidev, 0);
- dev->iobase = io_base;
+ ret = comedi_pci_enable(pcidev, dev->board_name);
+ if (ret)
+ return ret;
+ dev->iobase = pci_resource_start(pcidev, 0);
- error = comedi_alloc_subdevices(dev, 1);
- if (error)
- return error;
+ ret = comedi_alloc_subdevices(dev, 1);
+ if (ret)
+ return ret;
subdevice = dev->subdevices + 0;
dev->read_subdev = subdevice;
@@ -196,8 +163,9 @@ static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it)
outb(0, dev->iobase + 0x20);
outb(0, dev->iobase + 0x40);
- printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " attached.\n",
- dev->minor);
+ dev_info(dev->class_dev, "%s: %s attached\n",
+ dev->driver->driver_name, dev->board_name);
+
return 0;
}
@@ -208,14 +176,13 @@ static void cnt_detach(struct comedi_device *dev)
if (pcidev) {
if (dev->iobase)
comedi_pci_disable(pcidev);
- pci_dev_put(pcidev);
}
}
static struct comedi_driver ke_counter_driver = {
.driver_name = "ke_counter",
.module = THIS_MODULE,
- .attach = cnt_attach,
+ .attach_pci = cnt_attach_pci,
.detach = cnt_detach,
};
--
1.7.11
--
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