Staging: comedi: add adl_pci7296 driver

Driver for the Adlink PCI-7296 96 ch. digital io board

From: Jon Grierson <jd@renko.co.uk>
Cc: David Schleef <ds@schleef.org>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/adl_pci7296.c

+/*
+    comedi/drivers/adl_pci7296.c
+
+    COMEDI - Linux Control and Measurement Device Interface
+    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+/*
+Driver: adl_pci7296
+Description: Driver for the Adlink PCI-7296 96 ch. digital io board
+Devices: [ADLink] PCI-7296 (adl_pci7296)
+Author: Jon Grierson <jd@renko.co.uk>
+Updated: Mon, 14 Apr 2008 15:05:56 +0100
+Status: testing
+
+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.
+*/
+
+#include "../comedidev.h"
+#include <linux/kernel.h>
+
+#include "comedi_pci.h"
+#include "8255.h"
+// #include "8253.h"
+
+#define PORT1A 0
+#define PORT2A 4
+#define PORT3A 8
+#define PORT4A 12
+
+#define PCI_DEVICE_ID_PCI7296 0x7296
+
+static DEFINE_PCI_DEVICE_TABLE(adl_pci7296_pci_table) = {
+	{PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7296, PCI_ANY_ID, PCI_ANY_ID, 0,
+		0, 0},
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, adl_pci7296_pci_table);
+
+typedef struct {
+	int data;
+	struct pci_dev *pci_dev;
+} adl_pci7296_private;
+
+#define devpriv ((adl_pci7296_private *)dev->private)
+
+static int adl_pci7296_attach(comedi_device * dev, comedi_devconfig * it);
+static int adl_pci7296_detach(comedi_device * dev);
+static comedi_driver driver_adl_pci7296 = {
+      driver_name:"adl_pci7296",
+      module:THIS_MODULE,
+      attach:adl_pci7296_attach,
+      detach:adl_pci7296_detach,
+};
+
+static int adl_pci7296_attach(comedi_device * dev, comedi_devconfig * it)
+{
+	struct pci_dev *pcidev;
+	comedi_subdevice *s;
+	int bus, slot;
+	int ret;
+
+	printk("comedi: attempt to attach...\n");
+	printk("comedi%d: adl_pci7432\n", dev->minor);
+
+	dev->board_name = "pci7432";
+	bus = it->options[0];
+	slot = it->options[1];
+
+	if (alloc_private(dev, sizeof(adl_pci7296_private)) < 0)
+		return -ENOMEM;
+
+	if (alloc_subdevices(dev, 4) < 0)
+		return -ENOMEM;
+
+	for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
+		pcidev != NULL;
+		pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
+
+		if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
+			pcidev->device == PCI_DEVICE_ID_PCI7296) {
+			if (bus || slot) {
+				/* requested particular bus/slot */
+				if (pcidev->bus->number != bus
+					|| PCI_SLOT(pcidev->devfn) != slot) {
+					continue;
+				}
+			}
+			devpriv->pci_dev = pcidev;
+			if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {
+				printk("comedi%d: Failed to enable PCI device and request regions\n", dev->minor);
+				return -EIO;
+			}
+
+			dev->iobase = pci_resource_start(pcidev, 2);
+			printk("comedi: base addr %4lx\n", dev->iobase);
+
+			// four 8255 digital io subdevices
+			s = dev->subdevices + 0;
+			subdev_8255_init(dev, s, NULL,
+				(unsigned long)(dev->iobase));
+
+			s = dev->subdevices + 1;
+			ret = subdev_8255_init(dev, s, NULL,
+				(unsigned long)(dev->iobase + PORT2A));
+			if (ret < 0)
+				return ret;
+
+			s = dev->subdevices + 2;
+			ret = subdev_8255_init(dev, s, NULL,
+				(unsigned long)(dev->iobase + PORT3A));
+			if (ret < 0)
+				return ret;
+
+			s = dev->subdevices + 3;
+			ret = subdev_8255_init(dev, s, NULL,
+				(unsigned long)(dev->iobase + PORT4A));
+			if (ret < 0)
+				return ret;
+
+			printk("attached\n");
+
+			return 1;
+		}
+	}
+
+	printk("comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
+		dev->minor, bus, slot);
+	return -EIO;
+}
+
+static int adl_pci7296_detach(comedi_device * dev)
+{
+	printk("comedi%d: pci7432: remove\n", dev->minor);
+
+	if (devpriv && devpriv->pci_dev) {
+		if (dev->iobase) {
+			comedi_pci_disable(devpriv->pci_dev);
+		}
+		pci_dev_put(devpriv->pci_dev);
+	}
+	// detach four 8255 digital io subdevices
+	if (dev->subdevices) {
+		subdev_8255_cleanup(dev, dev->subdevices + 0);
+		subdev_8255_cleanup(dev, dev->subdevices + 1);
+		subdev_8255_cleanup(dev, dev->subdevices + 2);
+		subdev_8255_cleanup(dev, dev->subdevices + 3);
+
+	}
+
+	return 0;
+}
+
+COMEDI_PCI_INITCLEANUP(driver_adl_pci7296, adl_pci7296_pci_table);