add idl4k kernel firmware version 1.13.0.105

kernel/drivers/uio/Kconfig

@@ -0,0 +1,97 @@
+menuconfig UIO
+	tristate "Userspace I/O drivers"
+	depends on !S390
+	help
+	  Enable this to allow the userspace driver core code to be
+	  built.  This code allows userspace programs easy access to
+	  kernel interrupts and memory locations, allowing some drivers
+	  to be written in userspace.  Note that a small kernel driver
+	  is also required for interrupt handling to work properly.
+
+	  If you don't know what to do here, say N.
+
+if UIO
+
+config UIO_CIF
+	tristate "generic Hilscher CIF Card driver"
+	depends on PCI
+	help
+	  Driver for Hilscher CIF DeviceNet and Profibus cards.  This
+	  driver requires a userspace component that handles all of the
+	  heavy lifting and can be found at:
+	  	http://www.osadl.org/projects/downloads/UIO/user/cif-*
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called uio_cif.
+
+config UIO_PDRV
+	tristate "Userspace I/O platform driver"
+	help
+	  Generic platform driver for Userspace I/O devices.
+
+	  If you don't know what to do here, say N.
+
+config UIO_PDRV_GENIRQ
+	tristate "Userspace I/O platform driver with generic IRQ handling"
+	help
+	  Platform driver for Userspace I/O devices, including generic
+	  interrupt handling code. Shared interrupts are not supported.
+
+	  This kernel driver requires that the matching userspace driver
+	  handles interrupts in a special way. Userspace is responsible
+	  for acknowledging the hardware device if needed, and re-enabling
+	  interrupts in the interrupt controller using the write() syscall.
+
+	  If you don't know what to do here, say N.
+
+config UIO_SMX
+	tristate "SMX cryptengine UIO interface"
+	help
+	  Userspace IO interface to the Cryptography engine found on the
+	  Nias Digital SMX boards.  These will be available from Q4 2008
+	  from http://www.niasdigital.com.  The userspace part of this
+	  driver will be released under the GPL at the same time as the
+	  hardware and will be able to be downloaded from the same site.
+
+	  If you compile this as a module, it will be called uio_smx.
+
+config UIO_AEC
+	tristate "AEC video timestamp device"
+	depends on PCI
+	help
+
+	  UIO driver for the Adrienne Electronics Corporation PCI time
+	  code device.
+
+	  This device differs from other UIO devices since it uses I/O
+	  ports instead of memory mapped I/O. In order to make it
+	  possible for UIO to work with this device a utility, uioport,
+	  can be used to read and write the ports:
+
+	    git clone git://ifup.org/philips/uioport.git
+
+	  If you compile this as a module, it will be called uio_aec.
+
+config UIO_SERCOS3
+	tristate "Automata Sercos III PCI card driver"
+	help
+	  Userspace I/O interface for the Sercos III PCI card from
+	  Automata GmbH. The userspace part of this driver will be
+	  available for download from the Automata GmbH web site.
+
+	  Automata GmbH:        http://www.automataweb.com
+	  Sercos III interface: http://www.sercos.com
+
+	  If you compile this as a module, it will be called uio_sercos3.
+
+config UIO_PCI_GENERIC
+	tristate "Generic driver for PCI 2.3 and PCI Express cards"
+	depends on PCI
+	default n
+	help
+	  Generic driver that you can bind, dynamically, to any
+	  PCI 2.3 compliant and PCI Express card. It is useful,
+	  primarily, for virtualization scenarios.
+	  If you compile this as a module, it will be called uio_pci_generic.
+
+endif

kernel/drivers/uio/Makefile

@@ -0,0 +1,8 @@
+obj-$(CONFIG_UIO)	+= uio.o
+obj-$(CONFIG_UIO_CIF)	+= uio_cif.o
+obj-$(CONFIG_UIO_PDRV)	+= uio_pdrv.o
+obj-$(CONFIG_UIO_PDRV_GENIRQ)	+= uio_pdrv_genirq.o
+obj-$(CONFIG_UIO_SMX)	+= uio_smx.o
+obj-$(CONFIG_UIO_AEC)	+= uio_aec.o
+obj-$(CONFIG_UIO_SERCOS3)	+= uio_sercos3.o
+obj-$(CONFIG_UIO_PCI_GENERIC)	+= uio_pci_generic.o

kernel/drivers/uio/uio.c

@@ -0,0 +1,928 @@
+/*
+ * drivers/uio/uio.c
+ *
+ * Copyright(C) 2005, Benedikt Spranger <b.spranger@linutronix.de>
+ * Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de>
+ * Copyright(C) 2006, Hans J. Koch <hjk@linutronix.de>
+ * Copyright(C) 2006, Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * Userspace IO
+ *
+ * Base Functions
+ *
+ * Licensed under the GPLv2 only.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/idr.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/kobject.h>
+#include <linux/uio_driver.h>
+
+#define UIO_MAX_DEVICES 255
+
+struct uio_device {
+	struct module		*owner;
+	struct device		*dev;
+	int			minor;
+	atomic_t		event;
+	struct fasync_struct	*async_queue;
+	wait_queue_head_t	wait;
+	int			vma_count;
+	struct uio_info		*info;
+	struct kobject		*map_dir;
+	struct kobject		*portio_dir;
+};
+
+static int uio_major;
+static DEFINE_IDR(uio_idr);
+static const struct file_operations uio_fops;
+
+/* UIO class infrastructure */
+static struct uio_class {
+	struct kref kref;
+	struct class *class;
+} *uio_class;
+
+/* Protect idr accesses */
+static DEFINE_MUTEX(minor_lock);
+
+/*
+ * attributes
+ */
+
+struct uio_map {
+	struct kobject kobj;
+	struct uio_mem *mem;
+};
+#define to_map(map) container_of(map, struct uio_map, kobj)
+
+static ssize_t map_name_show(struct uio_mem *mem, char *buf)
+{
+	if (unlikely(!mem->name))
+		mem->name = "";
+
+	return sprintf(buf, "%s\n", mem->name);
+}
+
+static ssize_t map_addr_show(struct uio_mem *mem, char *buf)
+{
+	return sprintf(buf, "0x%lx\n", mem->addr);
+}
+
+static ssize_t map_size_show(struct uio_mem *mem, char *buf)
+{
+	return sprintf(buf, "0x%lx\n", mem->size);
+}
+
+static ssize_t map_offset_show(struct uio_mem *mem, char *buf)
+{
+	return sprintf(buf, "0x%lx\n", mem->addr & ~PAGE_MASK);
+}
+
+struct map_sysfs_entry {
+	struct attribute attr;
+	ssize_t (*show)(struct uio_mem *, char *);
+	ssize_t (*store)(struct uio_mem *, const char *, size_t);
+};
+
+static struct map_sysfs_entry name_attribute =
+	__ATTR(name, S_IRUGO, map_name_show, NULL);
+static struct map_sysfs_entry addr_attribute =
+	__ATTR(addr, S_IRUGO, map_addr_show, NULL);
+static struct map_sysfs_entry size_attribute =
+	__ATTR(size, S_IRUGO, map_size_show, NULL);
+static struct map_sysfs_entry offset_attribute =
+	__ATTR(offset, S_IRUGO, map_offset_show, NULL);
+
+static struct attribute *attrs[] = {
+	&name_attribute.attr,
+	&addr_attribute.attr,
+	&size_attribute.attr,
+	&offset_attribute.attr,
+	NULL,	/* need to NULL terminate the list of attributes */
+};
+
+static void map_release(struct kobject *kobj)
+{
+	struct uio_map *map = to_map(kobj);
+	kfree(map);
+}
+
+static ssize_t map_type_show(struct kobject *kobj, struct attribute *attr,
+			     char *buf)
+{
+	struct uio_map *map = to_map(kobj);
+	struct uio_mem *mem = map->mem;
+	struct map_sysfs_entry *entry;
+
+	entry = container_of(attr, struct map_sysfs_entry, attr);
+
+	if (!entry->show)
+		return -EIO;
+
+	return entry->show(mem, buf);
+}
+
+static struct sysfs_ops map_sysfs_ops = {
+	.show = map_type_show,
+};
+
+static struct kobj_type map_attr_type = {
+	.release	= map_release,
+	.sysfs_ops	= &map_sysfs_ops,
+	.default_attrs	= attrs,
+};
+
+struct uio_portio {
+	struct kobject kobj;
+	struct uio_port *port;
+};
+#define to_portio(portio) container_of(portio, struct uio_portio, kobj)
+
+static ssize_t portio_name_show(struct uio_port *port, char *buf)
+{
+	if (unlikely(!port->name))
+		port->name = "";
+
+	return sprintf(buf, "%s\n", port->name);
+}
+
+static ssize_t portio_start_show(struct uio_port *port, char *buf)
+{
+	return sprintf(buf, "0x%lx\n", port->start);
+}
+
+static ssize_t portio_size_show(struct uio_port *port, char *buf)
+{
+	return sprintf(buf, "0x%lx\n", port->size);
+}
+
+static ssize_t portio_porttype_show(struct uio_port *port, char *buf)
+{
+	const char *porttypes[] = {"none", "x86", "gpio", "other"};
+
+	if ((port->porttype < 0) || (port->porttype > UIO_PORT_OTHER))
+		return -EINVAL;
+
+	return sprintf(buf, "port_%s\n", porttypes[port->porttype]);
+}
+
+struct portio_sysfs_entry {
+	struct attribute attr;
+	ssize_t (*show)(struct uio_port *, char *);
+	ssize_t (*store)(struct uio_port *, const char *, size_t);
+};
+
+static struct portio_sysfs_entry portio_name_attribute =
+	__ATTR(name, S_IRUGO, portio_name_show, NULL);
+static struct portio_sysfs_entry portio_start_attribute =
+	__ATTR(start, S_IRUGO, portio_start_show, NULL);
+static struct portio_sysfs_entry portio_size_attribute =
+	__ATTR(size, S_IRUGO, portio_size_show, NULL);
+static struct portio_sysfs_entry portio_porttype_attribute =
+	__ATTR(porttype, S_IRUGO, portio_porttype_show, NULL);
+
+static struct attribute *portio_attrs[] = {
+	&portio_name_attribute.attr,
+	&portio_start_attribute.attr,
+	&portio_size_attribute.attr,
+	&portio_porttype_attribute.attr,
+	NULL,
+};
+
+static void portio_release(struct kobject *kobj)
+{
+	struct uio_portio *portio = to_portio(kobj);
+	kfree(portio);
+}
+
+static ssize_t portio_type_show(struct kobject *kobj, struct attribute *attr,
+			     char *buf)
+{
+	struct uio_portio *portio = to_portio(kobj);
+	struct uio_port *port = portio->port;
+	struct portio_sysfs_entry *entry;
+
+	entry = container_of(attr, struct portio_sysfs_entry, attr);
+
+	if (!entry->show)
+		return -EIO;
+
+	return entry->show(port, buf);
+}
+
+static struct sysfs_ops portio_sysfs_ops = {
+	.show = portio_type_show,
+};
+
+static struct kobj_type portio_attr_type = {
+	.release	= portio_release,
+	.sysfs_ops	= &portio_sysfs_ops,
+	.default_attrs	= portio_attrs,
+};
+
+static ssize_t show_name(struct device *dev,
+			 struct device_attribute *attr, char *buf)
+{
+	struct uio_device *idev = dev_get_drvdata(dev);
+	if (idev)
+		return sprintf(buf, "%s\n", idev->info->name);
+	else
+		return -ENODEV;
+}
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+
+static ssize_t show_version(struct device *dev,
+			    struct device_attribute *attr, char *buf)
+{
+	struct uio_device *idev = dev_get_drvdata(dev);
+	if (idev)
+		return sprintf(buf, "%s\n", idev->info->version);
+	else
+		return -ENODEV;
+}
+static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
+
+static ssize_t show_event(struct device *dev,
+			  struct device_attribute *attr, char *buf)
+{
+	struct uio_device *idev = dev_get_drvdata(dev);
+	if (idev)
+		return sprintf(buf, "%u\n",
+				(unsigned int)atomic_read(&idev->event));
+	else
+		return -ENODEV;
+}
+static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
+
+static struct attribute *uio_attrs[] = {
+	&dev_attr_name.attr,
+	&dev_attr_version.attr,
+	&dev_attr_event.attr,
+	NULL,
+};
+
+static struct attribute_group uio_attr_grp = {
+	.attrs = uio_attrs,
+};
+
+/*
+ * device functions
+ */
+static int uio_dev_add_attributes(struct uio_device *idev)
+{
+	int ret;
+	int mi, pi;
+	int map_found = 0;
+	int portio_found = 0;
+	struct uio_mem *mem;
+	struct uio_map *map;
+	struct uio_port *port;
+	struct uio_portio *portio;
+
+	ret = sysfs_create_group(&idev->dev->kobj, &uio_attr_grp);
+	if (ret)
+		goto err_group;
+
+	for (mi = 0; mi < MAX_UIO_MAPS; mi++) {
+		mem = &idev->info->mem[mi];
+		if (mem->size == 0)
+			break;
+		if (!map_found) {
+			map_found = 1;
+			idev->map_dir = kobject_create_and_add("maps",
+							&idev->dev->kobj);
+			if (!idev->map_dir)
+				goto err_map;
+		}
+		map = kzalloc(sizeof(*map), GFP_KERNEL);
+		if (!map)
+			goto err_map;
+		kobject_init(&map->kobj, &map_attr_type);
+		map->mem = mem;
+		mem->map = map;
+		ret = kobject_add(&map->kobj, idev->map_dir, "map%d", mi);
+		if (ret)
+			goto err_map;
+		ret = kobject_uevent(&map->kobj, KOBJ_ADD);
+		if (ret)
+			goto err_map;
+	}
+
+	for (pi = 0; pi < MAX_UIO_PORT_REGIONS; pi++) {
+		port = &idev->info->port[pi];
+		if (port->size == 0)
+			break;
+		if (!portio_found) {
+			portio_found = 1;
+			idev->portio_dir = kobject_create_and_add("portio",
+							&idev->dev->kobj);
+			if (!idev->portio_dir)
+				goto err_portio;
+		}
+		portio = kzalloc(sizeof(*portio), GFP_KERNEL);
+		if (!portio)
+			goto err_portio;
+		kobject_init(&portio->kobj, &portio_attr_type);
+		portio->port = port;
+		port->portio = portio;
+		ret = kobject_add(&portio->kobj, idev->portio_dir,
+							"port%d", pi);
+		if (ret)
+			goto err_portio;
+		ret = kobject_uevent(&portio->kobj, KOBJ_ADD);
+		if (ret)
+			goto err_portio;
+	}
+
+	return 0;
+
+err_portio:
+	for (pi--; pi >= 0; pi--) {
+		port = &idev->info->port[pi];
+		portio = port->portio;
+		kobject_put(&portio->kobj);
+	}
+	kobject_put(idev->portio_dir);
+err_map:
+	for (mi--; mi>=0; mi--) {
+		mem = &idev->info->mem[mi];
+		map = mem->map;
+		kobject_put(&map->kobj);
+	}
+	kobject_put(idev->map_dir);
+	sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
+err_group:
+	dev_err(idev->dev, "error creating sysfs files (%d)\n", ret);
+	return ret;
+}
+
+static void uio_dev_del_attributes(struct uio_device *idev)
+{
+	int i;
+	struct uio_mem *mem;
+	struct uio_port *port;
+
+	for (i = 0; i < MAX_UIO_MAPS; i++) {
+		mem = &idev->info->mem[i];
+		if (mem->size == 0)
+			break;
+		kobject_put(&mem->map->kobj);
+	}
+	kobject_put(idev->map_dir);
+
+	for (i = 0; i < MAX_UIO_PORT_REGIONS; i++) {
+		port = &idev->info->port[i];
+		if (port->size == 0)
+			break;
+		kobject_put(&port->portio->kobj);
+	}
+	kobject_put(idev->portio_dir);
+
+	sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
+}
+
+static int uio_get_minor(struct uio_device *idev)
+{
+	int retval = -ENOMEM;
+	int id;
+
+	mutex_lock(&minor_lock);
+	if (idr_pre_get(&uio_idr, GFP_KERNEL) == 0)
+		goto exit;
+
+	retval = idr_get_new(&uio_idr, idev, &id);
+	if (retval < 0) {
+		if (retval == -EAGAIN)
+			retval = -ENOMEM;
+		goto exit;
+	}
+	idev->minor = id & MAX_ID_MASK;
+exit:
+	mutex_unlock(&minor_lock);
+	return retval;
+}
+
+static void uio_free_minor(struct uio_device *idev)
+{
+	mutex_lock(&minor_lock);
+	idr_remove(&uio_idr, idev->minor);
+	mutex_unlock(&minor_lock);
+}
+
+/**
+ * uio_event_notify - trigger an interrupt event
+ * @info: UIO device capabilities
+ */
+void uio_event_notify(struct uio_info *info)
+{
+	struct uio_device *idev = info->uio_dev;
+
+	atomic_inc(&idev->event);
+	wake_up_interruptible(&idev->wait);
+	kill_fasync(&idev->async_queue, SIGIO, POLL_IN);
+}
+EXPORT_SYMBOL_GPL(uio_event_notify);
+
+/**
+ * uio_interrupt - hardware interrupt handler
+ * @irq: IRQ number, can be UIO_IRQ_CYCLIC for cyclic timer
+ * @dev_id: Pointer to the devices uio_device structure
+ */
+static irqreturn_t uio_interrupt(int irq, void *dev_id)
+{
+	struct uio_device *idev = (struct uio_device *)dev_id;
+	irqreturn_t ret = idev->info->handler(irq, idev->info);
+
+	if (ret == IRQ_HANDLED)
+		uio_event_notify(idev->info);
+
+	return ret;
+}
+
+struct uio_listener {
+	struct uio_device *dev;
+	s32 event_count;
+};
+
+static int uio_open(struct inode *inode, struct file *filep)
+{
+	struct uio_device *idev;
+	struct uio_listener *listener;
+	int ret = 0;
+
+	mutex_lock(&minor_lock);
+	idev = idr_find(&uio_idr, iminor(inode));
+	mutex_unlock(&minor_lock);
+	if (!idev) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	if (!try_module_get(idev->owner)) {
+		ret = -ENODEV;
+		goto out;
+	}
+
+	listener = kmalloc(sizeof(*listener), GFP_KERNEL);
+	if (!listener) {
+		ret = -ENOMEM;
+		goto err_alloc_listener;
+	}
+
+	listener->dev = idev;
+	listener->event_count = atomic_read(&idev->event);
+	filep->private_data = listener;
+
+	if (idev->info->open) {
+		ret = idev->info->open(idev->info, inode);
+		if (ret)
+			goto err_infoopen;
+	}
+	return 0;
+
+err_infoopen:
+	kfree(listener);
+
+err_alloc_listener:
+	module_put(idev->owner);
+
+out:
+	return ret;
+}
+
+static int uio_fasync(int fd, struct file *filep, int on)
+{
+	struct uio_listener *listener = filep->private_data;
+	struct uio_device *idev = listener->dev;
+
+	return fasync_helper(fd, filep, on, &idev->async_queue);
+}
+
+static int uio_release(struct inode *inode, struct file *filep)
+{
+	int ret = 0;
+	struct uio_listener *listener = filep->private_data;
+	struct uio_device *idev = listener->dev;
+
+	if (idev->info->release)
+		ret = idev->info->release(idev->info, inode);
+
+	module_put(idev->owner);
+	kfree(listener);
+	return ret;
+}
+
+static unsigned int uio_poll(struct file *filep, poll_table *wait)
+{
+	struct uio_listener *listener = filep->private_data;
+	struct uio_device *idev = listener->dev;
+
+	if (idev->info->irq == UIO_IRQ_NONE)
+		return -EIO;
+
+	poll_wait(filep, &idev->wait, wait);
+	if (listener->event_count != atomic_read(&idev->event))
+		return POLLIN | POLLRDNORM;
+	return 0;
+}
+
+static ssize_t uio_read(struct file *filep, char __user *buf,
+			size_t count, loff_t *ppos)
+{
+	struct uio_listener *listener = filep->private_data;
+	struct uio_device *idev = listener->dev;
+	DECLARE_WAITQUEUE(wait, current);
+	ssize_t retval;
+	s32 event_count;
+
+	if (idev->info->irq == UIO_IRQ_NONE)
+		return -EIO;
+
+	if (count != sizeof(s32))
+		return -EINVAL;
+
+	add_wait_queue(&idev->wait, &wait);
+
+	do {
+		set_current_state(TASK_INTERRUPTIBLE);
+
+		event_count = atomic_read(&idev->event);
+		if (event_count != listener->event_count) {
+			if (copy_to_user(buf, &event_count, count))
+				retval = -EFAULT;
+			else {
+				listener->event_count = event_count;
+				retval = count;
+			}
+			break;
+		}
+
+		if (filep->f_flags & O_NONBLOCK) {
+			retval = -EAGAIN;
+			break;
+		}
+
+		if (signal_pending(current)) {
+			retval = -ERESTARTSYS;
+			break;
+		}
+		schedule();
+	} while (1);
+
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(&idev->wait, &wait);
+
+	return retval;
+}
+
+static ssize_t uio_write(struct file *filep, const char __user *buf,
+			size_t count, loff_t *ppos)
+{
+	struct uio_listener *listener = filep->private_data;
+	struct uio_device *idev = listener->dev;
+	ssize_t retval;
+	s32 irq_on;
+
+	if (idev->info->irq == UIO_IRQ_NONE)
+		return -EIO;
+
+	if (count != sizeof(s32))
+		return -EINVAL;
+
+	if (!idev->info->irqcontrol)
+		return -ENOSYS;
+
+	if (copy_from_user(&irq_on, buf, count))
+		return -EFAULT;
+
+	retval = idev->info->irqcontrol(idev->info, irq_on);
+
+	return retval ? retval : sizeof(s32);
+}
+
+static int uio_find_mem_index(struct vm_area_struct *vma)
+{
+	int mi;
+	struct uio_device *idev = vma->vm_private_data;
+
+	for (mi = 0; mi < MAX_UIO_MAPS; mi++) {
+		if (idev->info->mem[mi].size == 0)
+			return -1;
+		if (vma->vm_pgoff == mi)
+			return mi;
+	}
+	return -1;
+}
+
+static void uio_vma_open(struct vm_area_struct *vma)
+{
+	struct uio_device *idev = vma->vm_private_data;
+	idev->vma_count++;
+}
+
+static void uio_vma_close(struct vm_area_struct *vma)
+{
+	struct uio_device *idev = vma->vm_private_data;
+	idev->vma_count--;
+}
+
+static int uio_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+	struct uio_device *idev = vma->vm_private_data;
+	struct page *page;
+	unsigned long offset;
+
+	int mi = uio_find_mem_index(vma);
+	if (mi < 0)
+		return VM_FAULT_SIGBUS;
+
+	/*
+	 * We need to subtract mi because userspace uses offset = N*PAGE_SIZE
+	 * to use mem[N].
+	 */
+	offset = (vmf->pgoff - mi) << PAGE_SHIFT;
+
+	if (idev->info->mem[mi].memtype == UIO_MEM_LOGICAL)
+		page = virt_to_page(idev->info->mem[mi].addr + offset);
+	else
+		page = vmalloc_to_page((void *)idev->info->mem[mi].addr
+							+ offset);
+	get_page(page);
+	vmf->page = page;
+	return 0;
+}
+
+static const struct vm_operations_struct uio_vm_ops = {
+	.open = uio_vma_open,
+	.close = uio_vma_close,
+	.fault = uio_vma_fault,
+};
+
+static int uio_mmap_physical(struct vm_area_struct *vma)
+{
+	struct uio_device *idev = vma->vm_private_data;
+	int mi = uio_find_mem_index(vma);
+	if (mi < 0)
+		return -EINVAL;
+
+	vma->vm_flags |= VM_IO | VM_RESERVED;
+
+	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+	return remap_pfn_range(vma,
+			       vma->vm_start,
+			       idev->info->mem[mi].addr >> PAGE_SHIFT,
+			       vma->vm_end - vma->vm_start,
+			       vma->vm_page_prot);
+}
+
+static int uio_mmap_logical(struct vm_area_struct *vma)
+{
+	vma->vm_flags |= VM_RESERVED;
+	vma->vm_ops = &uio_vm_ops;
+	uio_vma_open(vma);
+	return 0;
+}
+
+static int uio_mmap(struct file *filep, struct vm_area_struct *vma)
+{
+	struct uio_listener *listener = filep->private_data;
+	struct uio_device *idev = listener->dev;
+	int mi;
+	unsigned long requested_pages, actual_pages;
+	int ret = 0;
+
+	if (vma->vm_end < vma->vm_start)
+		return -EINVAL;
+
+	vma->vm_private_data = idev;
+
+	mi = uio_find_mem_index(vma);
+	if (mi < 0)
+		return -EINVAL;
+
+	requested_pages = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
+	actual_pages = ((idev->info->mem[mi].addr & ~PAGE_MASK)
+			+ idev->info->mem[mi].size + PAGE_SIZE -1) >> PAGE_SHIFT;
+	if (requested_pages > actual_pages)
+		return -EINVAL;
+
+	if (idev->info->mmap) {
+		ret = idev->info->mmap(idev->info, vma);
+		return ret;
+	}
+
+	switch (idev->info->mem[mi].memtype) {
+		case UIO_MEM_PHYS:
+			return uio_mmap_physical(vma);
+		case UIO_MEM_LOGICAL:
+		case UIO_MEM_VIRTUAL:
+			return uio_mmap_logical(vma);
+		default:
+			return -EINVAL;
+	}
+}
+
+static const struct file_operations uio_fops = {
+	.owner		= THIS_MODULE,
+	.open		= uio_open,
+	.release	= uio_release,
+	.read		= uio_read,
+	.write		= uio_write,
+	.mmap		= uio_mmap,
+	.poll		= uio_poll,
+	.fasync		= uio_fasync,
+};
+
+static int uio_major_init(void)
+{
+	uio_major = register_chrdev(0, "uio", &uio_fops);
+	if (uio_major < 0)
+		return uio_major;
+	return 0;
+}
+
+static void uio_major_cleanup(void)
+{
+	unregister_chrdev(uio_major, "uio");
+}
+
+static int init_uio_class(void)
+{
+	int ret = 0;
+
+	if (uio_class != NULL) {
+		kref_get(&uio_class->kref);
+		goto exit;
+	}
+
+	/* This is the first time in here, set everything up properly */
+	ret = uio_major_init();
+	if (ret)
+		goto exit;
+
+	uio_class = kzalloc(sizeof(*uio_class), GFP_KERNEL);
+	if (!uio_class) {
+		ret = -ENOMEM;
+		goto err_kzalloc;
+	}
+
+	kref_init(&uio_class->kref);
+	uio_class->class = class_create(THIS_MODULE, "uio");
+	if (IS_ERR(uio_class->class)) {
+		ret = IS_ERR(uio_class->class);
+		printk(KERN_ERR "class_create failed for uio\n");
+		goto err_class_create;
+	}
+	return 0;
+
+err_class_create:
+	kfree(uio_class);
+	uio_class = NULL;
+err_kzalloc:
+	uio_major_cleanup();
+exit:
+	return ret;
+}
+
+static void release_uio_class(struct kref *kref)
+{
+	/* Ok, we cheat as we know we only have one uio_class */
+	class_destroy(uio_class->class);
+	kfree(uio_class);
+	uio_major_cleanup();
+	uio_class = NULL;
+}
+
+static void uio_class_destroy(void)
+{
+	if (uio_class)
+		kref_put(&uio_class->kref, release_uio_class);
+}
+
+/**
+ * uio_register_device - register a new userspace IO device
+ * @owner:	module that creates the new device
+ * @parent:	parent device
+ * @info:	UIO device capabilities
+ *
+ * returns zero on success or a negative error code.
+ */
+int __uio_register_device(struct module *owner,
+			  struct device *parent,
+			  struct uio_info *info)
+{
+	struct uio_device *idev;
+	int ret = 0;
+
+	if (!parent || !info || !info->name || !info->version)
+		return -EINVAL;
+
+	info->uio_dev = NULL;
+
+	ret = init_uio_class();
+	if (ret)
+		return ret;
+
+	idev = kzalloc(sizeof(*idev), GFP_KERNEL);
+	if (!idev) {
+		ret = -ENOMEM;
+		goto err_kzalloc;
+	}
+
+	idev->owner = owner;
+	idev->info = info;
+	init_waitqueue_head(&idev->wait);
+	atomic_set(&idev->event, 0);
+
+	ret = uio_get_minor(idev);
+	if (ret)
+		goto err_get_minor;
+
+	idev->dev = device_create(uio_class->class, parent,
+				  MKDEV(uio_major, idev->minor), idev,
+				  "uio%d", idev->minor);
+	if (IS_ERR(idev->dev)) {
+		printk(KERN_ERR "UIO: device register failed\n");
+		ret = PTR_ERR(idev->dev);
+		goto err_device_create;
+	}
+
+	ret = uio_dev_add_attributes(idev);
+	if (ret)
+		goto err_uio_dev_add_attributes;
+
+	info->uio_dev = idev;
+
+	if (idev->info->irq >= 0) {
+		ret = request_irq(idev->info->irq, uio_interrupt,
+				  idev->info->irq_flags, idev->info->name, idev);
+		if (ret)
+			goto err_request_irq;
+	}
+
+	return 0;
+
+err_request_irq:
+	uio_dev_del_attributes(idev);
+err_uio_dev_add_attributes:
+	device_destroy(uio_class->class, MKDEV(uio_major, idev->minor));
+err_device_create:
+	uio_free_minor(idev);
+err_get_minor:
+	kfree(idev);
+err_kzalloc:
+	uio_class_destroy();
+	return ret;
+}
+EXPORT_SYMBOL_GPL(__uio_register_device);
+
+/**
+ * uio_unregister_device - unregister a industrial IO device
+ * @info:	UIO device capabilities
+ *
+ */
+void uio_unregister_device(struct uio_info *info)
+{
+	struct uio_device *idev;
+
+	if (!info || !info->uio_dev)
+		return;
+
+	idev = info->uio_dev;
+
+	uio_free_minor(idev);
+
+	if (info->irq >= 0)
+		free_irq(info->irq, idev);
+
+	uio_dev_del_attributes(idev);
+
+	dev_set_drvdata(idev->dev, NULL);
+	device_destroy(uio_class->class, MKDEV(uio_major, idev->minor));
+	kfree(idev);
+	uio_class_destroy();
+
+	return;
+}
+EXPORT_SYMBOL_GPL(uio_unregister_device);
+
+static int __init uio_init(void)
+{
+	return 0;
+}
+
+static void __exit uio_exit(void)
+{
+}
+
+module_init(uio_init)
+module_exit(uio_exit)
+MODULE_LICENSE("GPL v2");

kernel/drivers/uio/uio_aec.c

@@ -0,0 +1,175 @@
+/*
+ * uio_aec.c -- simple driver for Adrienne Electronics Corp time code PCI device
+ *
+ * Copyright (C) 2008 Brandon Philips <brandon@ifup.org>
+ *
+ *   This program is free software; you can redistribute it and/or modify it
+ *   under the terms of the GNU General Public License version 2 as published
+ *   by the Free Software Foundation.
+ *
+ *   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., 59
+ *   Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/cdev.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/uio_driver.h>
+
+#define PCI_VENDOR_ID_AEC 0xaecb
+#define PCI_DEVICE_ID_AEC_VITCLTC 0x6250
+
+#define INT_ENABLE_ADDR		0xFC
+#define INT_ENABLE		0x10
+#define INT_DISABLE		0x0
+
+#define INT_MASK_ADDR		0x2E
+#define INT_MASK_ALL		0x3F
+
+#define INTA_DRVR_ADDR		0xFE
+#define INTA_ENABLED_FLAG	0x08
+#define INTA_FLAG		0x01
+
+#define MAILBOX			0x0F
+
+static struct pci_device_id ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_AEC, PCI_DEVICE_ID_AEC_VITCLTC), },
+	{ 0, }
+};
+MODULE_DEVICE_TABLE(pci, ids);
+
+static irqreturn_t aectc_irq(int irq, struct uio_info *dev_info)
+{
+	void __iomem *int_flag = dev_info->priv + INTA_DRVR_ADDR;
+	unsigned char status = ioread8(int_flag);
+
+
+	if ((status & INTA_ENABLED_FLAG) && (status & INTA_FLAG)) {
+		/* application writes 0x00 to 0x2F to get next interrupt */
+		status = ioread8(dev_info->priv + MAILBOX);
+		return IRQ_HANDLED;
+	}
+
+	return IRQ_NONE;
+}
+
+static void print_board_data(struct pci_dev *pdev, struct uio_info *i)
+{
+	dev_info(&pdev->dev, "PCI-TC board vendor: %x%x number: %x%x"
+		" revision: %c%c\n",
+		ioread8(i->priv + 0x01),
+		ioread8(i->priv + 0x00),
+		ioread8(i->priv + 0x03),
+		ioread8(i->priv + 0x02),
+		ioread8(i->priv + 0x06),
+		ioread8(i->priv + 0x07));
+}
+
+static int __devinit probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct uio_info *info;
+	int ret;
+
+	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	if (pci_enable_device(pdev))
+		goto out_free;
+
+	if (pci_request_regions(pdev, "aectc"))
+		goto out_disable;
+
+	info->name = "aectc";
+	info->port[0].start = pci_resource_start(pdev, 0);
+	if (!info->port[0].start)
+		goto out_release;
+	info->priv = pci_iomap(pdev, 0, 0);
+	if (!info->priv)
+		goto out_release;
+	info->port[0].size = pci_resource_len(pdev, 0);
+	info->port[0].porttype = UIO_PORT_GPIO;
+
+	info->version = "0.0.1";
+	info->irq = pdev->irq;
+	info->irq_flags = IRQF_SHARED;
+	info->handler = aectc_irq;
+
+	print_board_data(pdev, info);
+	ret = uio_register_device(&pdev->dev, info);
+	if (ret)
+		goto out_unmap;
+
+	iowrite32(INT_ENABLE, info->priv + INT_ENABLE_ADDR);
+	iowrite8(INT_MASK_ALL, info->priv + INT_MASK_ADDR);
+	if (!(ioread8(info->priv + INTA_DRVR_ADDR)
+			& INTA_ENABLED_FLAG))
+		dev_err(&pdev->dev, "aectc: interrupts not enabled\n");
+
+	pci_set_drvdata(pdev, info);
+
+	return 0;
+
+out_unmap:
+	pci_iounmap(pdev, info->priv);
+out_release:
+	pci_release_regions(pdev);
+out_disable:
+	pci_disable_device(pdev);
+out_free:
+	kfree(info);
+	return -ENODEV;
+}
+
+static void remove(struct pci_dev *pdev)
+{
+	struct uio_info *info = pci_get_drvdata(pdev);
+
+	/* disable interrupts */
+	iowrite8(INT_DISABLE, info->priv + INT_MASK_ADDR);
+	iowrite32(INT_DISABLE, info->priv + INT_ENABLE_ADDR);
+	/* read mailbox to ensure board drops irq */
+	ioread8(info->priv + MAILBOX);
+
+	uio_unregister_device(info);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+	pci_set_drvdata(pdev, NULL);
+	iounmap(info->priv);
+
+	kfree(info);
+}
+
+static struct pci_driver pci_driver = {
+	.name = "aectc",
+	.id_table = ids,
+	.probe = probe,
+	.remove = remove,
+};
+
+static int __init aectc_init(void)
+{
+	return pci_register_driver(&pci_driver);
+}
+
+static void __exit aectc_exit(void)
+{
+	pci_unregister_driver(&pci_driver);
+}
+
+MODULE_LICENSE("GPL");
+
+module_init(aectc_init);
+module_exit(aectc_exit);

kernel/drivers/uio/uio_cif.c

@@ -0,0 +1,152 @@
+/*
+ * UIO Hilscher CIF card driver
+ *
+ * (C) 2007 Hans J. Koch <hjk@linutronix.de>
+ * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
+ *
+ * Licensed under GPL version 2 only.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/uio_driver.h>
+
+#include <asm/io.h>
+
+#define PLX9030_INTCSR		0x4C
+#define INTSCR_INT1_ENABLE	0x01
+#define INTSCR_INT1_STATUS	0x04
+#define INT1_ENABLED_AND_ACTIVE	(INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS)
+
+#define PCI_SUBVENDOR_ID_PEP	0x1518
+#define CIF_SUBDEVICE_PROFIBUS	0x430
+#define CIF_SUBDEVICE_DEVICENET	0x432
+
+
+static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
+{
+	void __iomem *plx_intscr = dev_info->mem[0].internal_addr
+					+ PLX9030_INTCSR;
+
+	if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
+	    != INT1_ENABLED_AND_ACTIVE)
+		return IRQ_NONE;
+
+	/* Disable interrupt */
+	iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
+	return IRQ_HANDLED;
+}
+
+static int __devinit hilscher_pci_probe(struct pci_dev *dev,
+					const struct pci_device_id *id)
+{
+	struct uio_info *info;
+
+	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	if (pci_enable_device(dev))
+		goto out_free;
+
+	if (pci_request_regions(dev, "hilscher"))
+		goto out_disable;
+
+	info->mem[0].addr = pci_resource_start(dev, 0);
+	if (!info->mem[0].addr)
+		goto out_release;
+	info->mem[0].internal_addr = pci_ioremap_bar(dev, 0);
+	if (!info->mem[0].internal_addr)
+		goto out_release;
+
+	info->mem[0].size = pci_resource_len(dev, 0);
+	info->mem[0].memtype = UIO_MEM_PHYS;
+	info->mem[1].addr = pci_resource_start(dev, 2);
+	info->mem[1].size = pci_resource_len(dev, 2);
+	info->mem[1].memtype = UIO_MEM_PHYS;
+	switch (id->subdevice) {
+		case CIF_SUBDEVICE_PROFIBUS:
+			info->name = "CIF_Profibus";
+			break;
+		case CIF_SUBDEVICE_DEVICENET:
+			info->name = "CIF_Devicenet";
+			break;
+		default:
+			info->name = "CIF_???";
+	}
+	info->version = "0.0.1";
+	info->irq = dev->irq;
+	info->irq_flags = IRQF_DISABLED | IRQF_SHARED;
+	info->handler = hilscher_handler;
+
+	if (uio_register_device(&dev->dev, info))
+		goto out_unmap;
+
+	pci_set_drvdata(dev, info);
+
+	return 0;
+out_unmap:
+	iounmap(info->mem[0].internal_addr);
+out_release:
+	pci_release_regions(dev);
+out_disable:
+	pci_disable_device(dev);
+out_free:
+	kfree (info);
+	return -ENODEV;
+}
+
+static void hilscher_pci_remove(struct pci_dev *dev)
+{
+	struct uio_info *info = pci_get_drvdata(dev);
+
+	uio_unregister_device(info);
+	pci_release_regions(dev);
+	pci_disable_device(dev);
+	pci_set_drvdata(dev, NULL);
+	iounmap(info->mem[0].internal_addr);
+
+	kfree (info);
+}
+
+static struct pci_device_id hilscher_pci_ids[] __devinitdata = {
+	{
+		.vendor =	PCI_VENDOR_ID_PLX,
+		.device =	PCI_DEVICE_ID_PLX_9030,
+		.subvendor =	PCI_SUBVENDOR_ID_PEP,
+		.subdevice =	CIF_SUBDEVICE_PROFIBUS,
+	},
+	{
+		.vendor =	PCI_VENDOR_ID_PLX,
+		.device =	PCI_DEVICE_ID_PLX_9030,
+		.subvendor =	PCI_SUBVENDOR_ID_PEP,
+		.subdevice =	CIF_SUBDEVICE_DEVICENET,
+	},
+	{ 0, }
+};
+
+static struct pci_driver hilscher_pci_driver = {
+	.name = "hilscher",
+	.id_table = hilscher_pci_ids,
+	.probe = hilscher_pci_probe,
+	.remove = hilscher_pci_remove,
+};
+
+static int __init hilscher_init_module(void)
+{
+	return pci_register_driver(&hilscher_pci_driver);
+}
+
+static void __exit hilscher_exit_module(void)
+{
+	pci_unregister_driver(&hilscher_pci_driver);
+}
+
+module_init(hilscher_init_module);
+module_exit(hilscher_exit_module);
+
+MODULE_DEVICE_TABLE(pci, hilscher_pci_ids);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");

kernel/drivers/uio/uio_pci_generic.c

@@ -0,0 +1,207 @@
+/* uio_pci_generic - generic UIO driver for PCI 2.3 devices
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ * Author: Michael S. Tsirkin <mst@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.
+ *
+ * Since the driver does not declare any device ids, you must allocate
+ * id and bind the device to the driver yourself.  For example:
+ *
+ * # echo "8086 10f5" > /sys/bus/pci/drivers/uio_pci_generic/new_id
+ * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/e1000e/unbind
+ * # echo -n 0000:00:19.0 > /sys/bus/pci/drivers/uio_pci_generic/bind
+ * # ls -l /sys/bus/pci/devices/0000:00:19.0/driver
+ * .../0000:00:19.0/driver -> ../../../bus/pci/drivers/uio_pci_generic
+ *
+ * Driver won't bind to devices which do not support the Interrupt Disable Bit
+ * in the command register. All devices compliant to PCI 2.3 (circa 2002) and
+ * all compliant PCI Express devices should support this bit.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/uio_driver.h>
+#include <linux/spinlock.h>
+
+#define DRIVER_VERSION	"0.01.0"
+#define DRIVER_AUTHOR	"Michael S. Tsirkin <mst@redhat.com>"
+#define DRIVER_DESC	"Generic UIO driver for PCI 2.3 devices"
+
+struct uio_pci_generic_dev {
+	struct uio_info info;
+	struct pci_dev *pdev;
+	spinlock_t lock; /* guards command register accesses */
+};
+
+static inline struct uio_pci_generic_dev *
+to_uio_pci_generic_dev(struct uio_info *info)
+{
+	return container_of(info, struct uio_pci_generic_dev, info);
+}
+
+/* Interrupt handler. Read/modify/write the command register to disable
+ * the interrupt. */
+static irqreturn_t irqhandler(int irq, struct uio_info *info)
+{
+	struct uio_pci_generic_dev *gdev = to_uio_pci_generic_dev(info);
+	struct pci_dev *pdev = gdev->pdev;
+	irqreturn_t ret = IRQ_NONE;
+	u32 cmd_status_dword;
+	u16 origcmd, newcmd, status;
+
+	/* We do a single dword read to retrieve both command and status.
+	 * Document assumptions that make this possible. */
+	BUILD_BUG_ON(PCI_COMMAND % 4);
+	BUILD_BUG_ON(PCI_COMMAND + 2 != PCI_STATUS);
+
+	spin_lock_irq(&gdev->lock);
+	pci_block_user_cfg_access(pdev);
+
+	/* Read both command and status registers in a single 32-bit operation.
+	 * Note: we could cache the value for command and move the status read
+	 * out of the lock if there was a way to get notified of user changes
+	 * to command register through sysfs. Should be good for shared irqs. */
+	pci_read_config_dword(pdev, PCI_COMMAND, &cmd_status_dword);
+	origcmd = cmd_status_dword;
+	status = cmd_status_dword >> 16;
+
+	/* Check interrupt status register to see whether our device
+	 * triggered the interrupt. */
+	if (!(status & PCI_STATUS_INTERRUPT))
+		goto done;
+
+	/* We triggered the interrupt, disable it. */
+	newcmd = origcmd | PCI_COMMAND_INTX_DISABLE;
+	if (newcmd != origcmd)
+		pci_write_config_word(pdev, PCI_COMMAND, newcmd);
+
+	/* UIO core will signal the user process. */
+	ret = IRQ_HANDLED;
+done:
+
+	pci_unblock_user_cfg_access(pdev);
+	spin_unlock_irq(&gdev->lock);
+	return ret;
+}
+
+/* Verify that the device supports Interrupt Disable bit in command register,
+ * per PCI 2.3, by flipping this bit and reading it back: this bit was readonly
+ * in PCI 2.2. */
+static int __devinit verify_pci_2_3(struct pci_dev *pdev)
+{
+	u16 orig, new;
+	int err = 0;
+
+	pci_block_user_cfg_access(pdev);
+	pci_read_config_word(pdev, PCI_COMMAND, &orig);
+	pci_write_config_word(pdev, PCI_COMMAND,
+			      orig ^ PCI_COMMAND_INTX_DISABLE);
+	pci_read_config_word(pdev, PCI_COMMAND, &new);
+	/* There's no way to protect against
+	 * hardware bugs or detect them reliably, but as long as we know
+	 * what the value should be, let's go ahead and check it. */
+	if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
+		err = -EBUSY;
+		dev_err(&pdev->dev, "Command changed from 0x%x to 0x%x: "
+			"driver or HW bug?\n", orig, new);
+		goto err;
+	}
+	if (!((new ^ orig) & PCI_COMMAND_INTX_DISABLE)) {
+		dev_warn(&pdev->dev, "Device does not support "
+			 "disabling interrupts: unable to bind.\n");
+		err = -ENODEV;
+		goto err;
+	}
+	/* Now restore the original value. */
+	pci_write_config_word(pdev, PCI_COMMAND, orig);
+err:
+	pci_unblock_user_cfg_access(pdev);
+	return err;
+}
+
+static int __devinit probe(struct pci_dev *pdev,
+			   const struct pci_device_id *id)
+{
+	struct uio_pci_generic_dev *gdev;
+	int err;
+
+	if (!pdev->irq) {
+		dev_warn(&pdev->dev, "No IRQ assigned to device: "
+			 "no support for interrupts?\n");
+		return -ENODEV;
+	}
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		dev_err(&pdev->dev, "%s: pci_enable_device failed: %d\n",
+			__func__, err);
+		return err;
+	}
+
+	err = verify_pci_2_3(pdev);
+	if (err)
+		goto err_verify;
+
+	gdev = kzalloc(sizeof(struct uio_pci_generic_dev), GFP_KERNEL);
+	if (!gdev) {
+		err = -ENOMEM;
+		goto err_alloc;
+	}
+
+	gdev->info.name = "uio_pci_generic";
+	gdev->info.version = DRIVER_VERSION;
+	gdev->info.irq = pdev->irq;
+	gdev->info.irq_flags = IRQF_SHARED;
+	gdev->info.handler = irqhandler;
+	gdev->pdev = pdev;
+	spin_lock_init(&gdev->lock);
+
+	if (uio_register_device(&pdev->dev, &gdev->info))
+		goto err_register;
+	pci_set_drvdata(pdev, gdev);
+
+	return 0;
+err_register:
+	kfree(gdev);
+err_alloc:
+err_verify:
+	pci_disable_device(pdev);
+	return err;
+}
+
+static void remove(struct pci_dev *pdev)
+{
+	struct uio_pci_generic_dev *gdev = pci_get_drvdata(pdev);
+
+	uio_unregister_device(&gdev->info);
+	pci_disable_device(pdev);
+	kfree(gdev);
+}
+
+static struct pci_driver driver = {
+	.name = "uio_pci_generic",
+	.id_table = NULL, /* only dynamic id's */
+	.probe = probe,
+	.remove = remove,
+};
+
+static int __init init(void)
+{
+	pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
+	return pci_register_driver(&driver);
+}
+
+static void __exit cleanup(void)
+{
+	pci_unregister_driver(&driver);
+}
+
+module_init(init);
+module_exit(cleanup);
+
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);

kernel/drivers/uio/uio_pdrv.c

@@ -0,0 +1,120 @@
+/*
+ * drivers/uio/uio_pdrv.c
+ *
+ * Copyright (C) 2008 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/stringify.h>
+
+#define DRIVER_NAME "uio_pdrv"
+
+struct uio_platdata {
+	struct uio_info *uioinfo;
+};
+
+static int uio_pdrv_probe(struct platform_device *pdev)
+{
+	struct uio_info *uioinfo = pdev->dev.platform_data;
+	struct uio_platdata *pdata;
+	struct uio_mem *uiomem;
+	int ret = -ENODEV;
+	int i;
+
+	if (!uioinfo || !uioinfo->name || !uioinfo->version) {
+		dev_dbg(&pdev->dev, "%s: err_uioinfo\n", __func__);
+		goto err_uioinfo;
+	}
+
+	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
+	if (!pdata) {
+		ret = -ENOMEM;
+		dev_dbg(&pdev->dev, "%s: err_alloc_pdata\n", __func__);
+		goto err_alloc_pdata;
+	}
+
+	pdata->uioinfo = uioinfo;
+
+	uiomem = &uioinfo->mem[0];
+
+	for (i = 0; i < pdev->num_resources; ++i) {
+		struct resource *r = &pdev->resource[i];
+
+		if (r->flags != IORESOURCE_MEM)
+			continue;
+
+		if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) {
+			dev_warn(&pdev->dev, "device has more than "
+					__stringify(MAX_UIO_MAPS)
+					" I/O memory resources.\n");
+			break;
+		}
+
+		uiomem->memtype = UIO_MEM_PHYS;
+		uiomem->addr = r->start;
+		uiomem->size = r->end - r->start + 1;
+		++uiomem;
+	}
+
+	while (uiomem < &uioinfo->mem[MAX_UIO_MAPS]) {
+		uiomem->size = 0;
+		++uiomem;
+	}
+
+	pdata->uioinfo->priv = pdata;
+
+	ret = uio_register_device(&pdev->dev, pdata->uioinfo);
+
+	if (ret) {
+		kfree(pdata);
+err_alloc_pdata:
+err_uioinfo:
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, pdata);
+
+	return 0;
+}
+
+static int uio_pdrv_remove(struct platform_device *pdev)
+{
+	struct uio_platdata *pdata = platform_get_drvdata(pdev);
+
+	uio_unregister_device(pdata->uioinfo);
+
+	kfree(pdata);
+
+	return 0;
+}
+
+static struct platform_driver uio_pdrv = {
+	.probe = uio_pdrv_probe,
+	.remove = uio_pdrv_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init uio_pdrv_init(void)
+{
+	return platform_driver_register(&uio_pdrv);
+}
+
+static void __exit uio_pdrv_exit(void)
+{
+	platform_driver_unregister(&uio_pdrv);
+}
+module_init(uio_pdrv_init);
+module_exit(uio_pdrv_exit);
+
+MODULE_AUTHOR("Uwe Kleine-Koenig");
+MODULE_DESCRIPTION("Userspace I/O platform driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);

kernel/drivers/uio/uio_pdrv_genirq.c

@@ -0,0 +1,244 @@
+/*
+ * drivers/uio/uio_pdrv_genirq.c
+ *
+ * Userspace I/O platform driver with generic IRQ handling code.
+ *
+ * Copyright (C) 2008 Magnus Damm
+ *
+ * Based on uio_pdrv.c by Uwe Kleine-Koenig,
+ * Copyright (C) 2008 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/stringify.h>
+#include <linux/pm_runtime.h>
+
+#define DRIVER_NAME "uio_pdrv_genirq"
+
+struct uio_pdrv_genirq_platdata {
+	struct uio_info *uioinfo;
+	spinlock_t lock;
+	unsigned long flags;
+	struct platform_device *pdev;
+};
+
+static int uio_pdrv_genirq_open(struct uio_info *info, struct inode *inode)
+{
+	struct uio_pdrv_genirq_platdata *priv = info->priv;
+
+	/* Wait until the Runtime PM code has woken up the device */
+	pm_runtime_get_sync(&priv->pdev->dev);
+	return 0;
+}
+
+static int uio_pdrv_genirq_release(struct uio_info *info, struct inode *inode)
+{
+	struct uio_pdrv_genirq_platdata *priv = info->priv;
+
+	/* Tell the Runtime PM code that the device has become idle */
+	pm_runtime_put_sync(&priv->pdev->dev);
+	return 0;
+}
+
+static irqreturn_t uio_pdrv_genirq_handler(int irq, struct uio_info *dev_info)
+{
+	struct uio_pdrv_genirq_platdata *priv = dev_info->priv;
+
+	/* Just disable the interrupt in the interrupt controller, and
+	 * remember the state so we can allow user space to enable it later.
+	 */
+
+	if (!test_and_set_bit(0, &priv->flags))
+		disable_irq_nosync(irq);
+
+	return IRQ_HANDLED;
+}
+
+static int uio_pdrv_genirq_irqcontrol(struct uio_info *dev_info, s32 irq_on)
+{
+	struct uio_pdrv_genirq_platdata *priv = dev_info->priv;
+	unsigned long flags;
+
+	/* Allow user space to enable and disable the interrupt
+	 * in the interrupt controller, but keep track of the
+	 * state to prevent per-irq depth damage.
+	 *
+	 * Serialize this operation to support multiple tasks.
+	 */
+
+	spin_lock_irqsave(&priv->lock, flags);
+	if (irq_on) {
+		if (test_and_clear_bit(0, &priv->flags))
+			enable_irq(dev_info->irq);
+	} else {
+		if (!test_and_set_bit(0, &priv->flags))
+			disable_irq(dev_info->irq);
+	}
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int uio_pdrv_genirq_probe(struct platform_device *pdev)
+{
+	struct uio_info *uioinfo = pdev->dev.platform_data;
+	struct uio_pdrv_genirq_platdata *priv;
+	struct uio_mem *uiomem;
+	int ret = -EINVAL;
+	int i;
+
+	if (!uioinfo || !uioinfo->name || !uioinfo->version) {
+		dev_err(&pdev->dev, "missing platform_data\n");
+		goto bad0;
+	}
+
+	if (uioinfo->handler || uioinfo->irqcontrol ||
+	    uioinfo->irq_flags & IRQF_SHARED) {
+		dev_err(&pdev->dev, "interrupt configuration error\n");
+		goto bad0;
+	}
+
+	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+	if (!priv) {
+		ret = -ENOMEM;
+		dev_err(&pdev->dev, "unable to kmalloc\n");
+		goto bad0;
+	}
+
+	priv->uioinfo = uioinfo;
+	spin_lock_init(&priv->lock);
+	priv->flags = 0; /* interrupt is enabled to begin with */
+	priv->pdev = pdev;
+
+	uiomem = &uioinfo->mem[0];
+
+	for (i = 0; i < pdev->num_resources; ++i) {
+		struct resource *r = &pdev->resource[i];
+
+		if (r->flags != IORESOURCE_MEM)
+			continue;
+
+		if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) {
+			dev_warn(&pdev->dev, "device has more than "
+					__stringify(MAX_UIO_MAPS)
+					" I/O memory resources.\n");
+			break;
+		}
+
+		uiomem->memtype = UIO_MEM_PHYS;
+		uiomem->addr = r->start;
+		uiomem->size = r->end - r->start + 1;
+		++uiomem;
+	}
+
+	while (uiomem < &uioinfo->mem[MAX_UIO_MAPS]) {
+		uiomem->size = 0;
+		++uiomem;
+	}
+
+	/* This driver requires no hardware specific kernel code to handle
+	 * interrupts. Instead, the interrupt handler simply disables the
+	 * interrupt in the interrupt controller. User space is responsible
+	 * for performing hardware specific acknowledge and re-enabling of
+	 * the interrupt in the interrupt controller.
+	 *
+	 * Interrupt sharing is not supported.
+	 */
+
+	uioinfo->irq_flags |= IRQF_DISABLED;
+	uioinfo->handler = uio_pdrv_genirq_handler;
+	uioinfo->irqcontrol = uio_pdrv_genirq_irqcontrol;
+	uioinfo->open = uio_pdrv_genirq_open;
+	uioinfo->release = uio_pdrv_genirq_release;
+	uioinfo->priv = priv;
+
+	/* Enable Runtime PM for this device:
+	 * The device starts in suspended state to allow the hardware to be
+	 * turned off by default. The Runtime PM bus code should power on the
+	 * hardware and enable clocks at open().
+	 */
+	pm_runtime_enable(&pdev->dev);
+
+	ret = uio_register_device(&pdev->dev, priv->uioinfo);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to register uio device\n");
+		goto bad1;
+	}
+
+	platform_set_drvdata(pdev, priv);
+	return 0;
+ bad1:
+	kfree(priv);
+	pm_runtime_disable(&pdev->dev);
+ bad0:
+	return ret;
+}
+
+static int uio_pdrv_genirq_remove(struct platform_device *pdev)
+{
+	struct uio_pdrv_genirq_platdata *priv = platform_get_drvdata(pdev);
+
+	uio_unregister_device(priv->uioinfo);
+	pm_runtime_disable(&pdev->dev);
+	kfree(priv);
+	return 0;
+}
+
+static int uio_pdrv_genirq_runtime_nop(struct device *dev)
+{
+	/* Runtime PM callback shared between ->runtime_suspend()
+	 * and ->runtime_resume(). Simply returns success.
+	 *
+	 * In this driver pm_runtime_get_sync() and pm_runtime_put_sync()
+	 * are used at open() and release() time. This allows the
+	 * Runtime PM code to turn off power to the device while the
+	 * device is unused, ie before open() and after release().
+	 *
+	 * This Runtime PM callback does not need to save or restore
+	 * any registers since user space is responsbile for hardware
+	 * register reinitialization after open().
+	 */
+	return 0;
+}
+
+static struct dev_pm_ops uio_pdrv_genirq_dev_pm_ops = {
+	.runtime_suspend = uio_pdrv_genirq_runtime_nop,
+	.runtime_resume = uio_pdrv_genirq_runtime_nop,
+};
+
+static struct platform_driver uio_pdrv_genirq = {
+	.probe = uio_pdrv_genirq_probe,
+	.remove = uio_pdrv_genirq_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+		.pm = &uio_pdrv_genirq_dev_pm_ops,
+	},
+};
+
+static int __init uio_pdrv_genirq_init(void)
+{
+	return platform_driver_register(&uio_pdrv_genirq);
+}
+
+static void __exit uio_pdrv_genirq_exit(void)
+{
+	platform_driver_unregister(&uio_pdrv_genirq);
+}
+
+module_init(uio_pdrv_genirq_init);
+module_exit(uio_pdrv_genirq_exit);
+
+MODULE_AUTHOR("Magnus Damm");
+MODULE_DESCRIPTION("Userspace I/O platform driver with generic IRQ handling");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);

kernel/drivers/uio/uio_sercos3.c

@@ -0,0 +1,243 @@
+/* sercos3: UIO driver for the Automata Sercos III PCI card
+
+   Copyright (C) 2008 Linutronix GmbH
+     Author: John Ogness <john.ogness@linutronix.de>
+
+   This is a straight-forward UIO driver, where interrupts are disabled
+   by the interrupt handler and re-enabled via a write to the UIO device
+   by the userspace-part.
+
+   The only part that may seem odd is the use of a logical OR when
+   storing and restoring enabled interrupts. This is done because the
+   userspace-part could directly modify the Interrupt Enable Register
+   at any time. To reduce possible conflicts, the kernel driver uses
+   a logical OR to make more controlled changes (rather than blindly
+   overwriting previous values).
+
+   Race conditions exist if the userspace-part directly modifies the
+   Interrupt Enable Register while in operation. The consequences are
+   that certain interrupts would fail to be enabled or disabled. For
+   this reason, the userspace-part should only directly modify the
+   Interrupt Enable Register at the beginning (to get things going).
+   The userspace-part can safely disable interrupts at any time using
+   a write to the UIO device.
+*/
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/uio_driver.h>
+#include <linux/io.h>
+
+/* ID's for SERCOS III PCI card (PLX 9030) */
+#define SERCOS_SUB_VENDOR_ID  0x1971
+#define SERCOS_SUB_SYSID_3530 0x3530
+#define SERCOS_SUB_SYSID_3535 0x3535
+#define SERCOS_SUB_SYSID_3780 0x3780
+
+/* Interrupt Enable Register */
+#define IER0_OFFSET 0x08
+
+/* Interrupt Status Register */
+#define ISR0_OFFSET 0x18
+
+struct sercos3_priv {
+	u32 ier0_cache;
+	spinlock_t ier0_cache_lock;
+};
+
+/* this function assumes ier0_cache_lock is locked! */
+static void sercos3_disable_interrupts(struct uio_info *info,
+				       struct sercos3_priv *priv)
+{
+	void __iomem *ier0 = info->mem[3].internal_addr + IER0_OFFSET;
+
+	/* add enabled interrupts to cache */
+	priv->ier0_cache |= ioread32(ier0);
+
+	/* disable interrupts */
+	iowrite32(0, ier0);
+}
+
+/* this function assumes ier0_cache_lock is locked! */
+static void sercos3_enable_interrupts(struct uio_info *info,
+				      struct sercos3_priv *priv)
+{
+	void __iomem *ier0 = info->mem[3].internal_addr + IER0_OFFSET;
+
+	/* restore previously enabled interrupts */
+	iowrite32(ioread32(ier0) | priv->ier0_cache, ier0);
+	priv->ier0_cache = 0;
+}
+
+static irqreturn_t sercos3_handler(int irq, struct uio_info *info)
+{
+	struct sercos3_priv *priv = info->priv;
+	void __iomem *isr0 = info->mem[3].internal_addr + ISR0_OFFSET;
+	void __iomem *ier0 = info->mem[3].internal_addr + IER0_OFFSET;
+
+	if (!(ioread32(isr0) & ioread32(ier0)))
+		return IRQ_NONE;
+
+	spin_lock(&priv->ier0_cache_lock);
+	sercos3_disable_interrupts(info, priv);
+	spin_unlock(&priv->ier0_cache_lock);
+
+	return IRQ_HANDLED;
+}
+
+static int sercos3_irqcontrol(struct uio_info *info, s32 irq_on)
+{
+	struct sercos3_priv *priv = info->priv;
+
+	spin_lock_irq(&priv->ier0_cache_lock);
+	if (irq_on)
+		sercos3_enable_interrupts(info, priv);
+	else
+		sercos3_disable_interrupts(info, priv);
+	spin_unlock_irq(&priv->ier0_cache_lock);
+
+	return 0;
+}
+
+static int sercos3_setup_iomem(struct pci_dev *dev, struct uio_info *info,
+			       int n, int pci_bar)
+{
+	info->mem[n].addr = pci_resource_start(dev, pci_bar);
+	if (!info->mem[n].addr)
+		return -1;
+	info->mem[n].internal_addr = ioremap(pci_resource_start(dev, pci_bar),
+					     pci_resource_len(dev, pci_bar));
+	if (!info->mem[n].internal_addr)
+		return -1;
+	info->mem[n].size = pci_resource_len(dev, pci_bar);
+	info->mem[n].memtype = UIO_MEM_PHYS;
+	return 0;
+}
+
+static int __devinit sercos3_pci_probe(struct pci_dev *dev,
+				       const struct pci_device_id *id)
+{
+	struct uio_info *info;
+	struct sercos3_priv *priv;
+	int i;
+
+	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	priv = kzalloc(sizeof(struct sercos3_priv), GFP_KERNEL);
+	if (!priv)
+		goto out_free;
+
+	if (pci_enable_device(dev))
+		goto out_free_priv;
+
+	if (pci_request_regions(dev, "sercos3"))
+		goto out_disable;
+
+	/* we only need PCI BAR's 0, 2, 3, 4, 5 */
+	if (sercos3_setup_iomem(dev, info, 0, 0))
+		goto out_unmap;
+	if (sercos3_setup_iomem(dev, info, 1, 2))
+		goto out_unmap;
+	if (sercos3_setup_iomem(dev, info, 2, 3))
+		goto out_unmap;
+	if (sercos3_setup_iomem(dev, info, 3, 4))
+		goto out_unmap;
+	if (sercos3_setup_iomem(dev, info, 4, 5))
+		goto out_unmap;
+
+	spin_lock_init(&priv->ier0_cache_lock);
+	info->priv = priv;
+	info->name = "Sercos_III_PCI";
+	info->version = "0.0.1";
+	info->irq = dev->irq;
+	info->irq_flags = IRQF_DISABLED | IRQF_SHARED;
+	info->handler = sercos3_handler;
+	info->irqcontrol = sercos3_irqcontrol;
+
+	pci_set_drvdata(dev, info);
+
+	if (uio_register_device(&dev->dev, info))
+		goto out_unmap;
+
+	return 0;
+
+out_unmap:
+	for (i = 0; i < 5; i++) {
+		if (info->mem[i].internal_addr)
+			iounmap(info->mem[i].internal_addr);
+	}
+	pci_release_regions(dev);
+out_disable:
+	pci_disable_device(dev);
+out_free_priv:
+	kfree(priv);
+out_free:
+	kfree(info);
+	return -ENODEV;
+}
+
+static void sercos3_pci_remove(struct pci_dev *dev)
+{
+	struct uio_info *info = pci_get_drvdata(dev);
+	int i;
+
+	uio_unregister_device(info);
+	pci_release_regions(dev);
+	pci_disable_device(dev);
+	pci_set_drvdata(dev, NULL);
+	for (i = 0; i < 5; i++) {
+		if (info->mem[i].internal_addr)
+			iounmap(info->mem[i].internal_addr);
+	}
+	kfree(info->priv);
+	kfree(info);
+}
+
+static struct pci_device_id sercos3_pci_ids[] __devinitdata = {
+	{
+		.vendor =       PCI_VENDOR_ID_PLX,
+		.device =       PCI_DEVICE_ID_PLX_9030,
+		.subvendor =    SERCOS_SUB_VENDOR_ID,
+		.subdevice =    SERCOS_SUB_SYSID_3530,
+	},
+	{
+		.vendor =       PCI_VENDOR_ID_PLX,
+		.device =       PCI_DEVICE_ID_PLX_9030,
+		.subvendor =    SERCOS_SUB_VENDOR_ID,
+		.subdevice =    SERCOS_SUB_SYSID_3535,
+	},
+	{
+		.vendor =       PCI_VENDOR_ID_PLX,
+		.device =       PCI_DEVICE_ID_PLX_9030,
+		.subvendor =    SERCOS_SUB_VENDOR_ID,
+		.subdevice =    SERCOS_SUB_SYSID_3780,
+	},
+	{ 0, }
+};
+
+static struct pci_driver sercos3_pci_driver = {
+	.name = "sercos3",
+	.id_table = sercos3_pci_ids,
+	.probe = sercos3_pci_probe,
+	.remove = sercos3_pci_remove,
+};
+
+static int __init sercos3_init_module(void)
+{
+	return pci_register_driver(&sercos3_pci_driver);
+}
+
+static void __exit sercos3_exit_module(void)
+{
+	pci_unregister_driver(&sercos3_pci_driver);
+}
+
+module_init(sercos3_init_module);
+module_exit(sercos3_exit_module);
+
+MODULE_DESCRIPTION("UIO driver for the Automata Sercos III PCI card");
+MODULE_AUTHOR("John Ogness <john.ogness@linutronix.de>");
+MODULE_LICENSE("GPL v2");

kernel/drivers/uio/uio_smx.c

@@ -0,0 +1,140 @@
+/*
+ * UIO SMX Cryptengine driver.
+ *
+ * (C) 2008 Nias Digital P/L <bn@niasdigital.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/io.h>
+
+#define DRV_NAME "smx-ce"
+#define DRV_VERSION "0.03"
+
+#define SMX_CSR  0x00000000
+#define SMX_EnD  0x00000001
+#define SMX_RUN  0x00000002
+#define SMX_DRDY 0x00000004
+#define SMX_ERR  0x00000008
+
+static irqreturn_t smx_handler(int irq, struct uio_info *dev_info)
+{
+	void __iomem *csr = dev_info->mem[0].internal_addr + SMX_CSR;
+
+	u32 status = ioread32(csr);
+
+	if (!(status & SMX_DRDY))
+		return IRQ_NONE;
+
+	/* Disable interrupt */
+	iowrite32(status & ~SMX_DRDY, csr);
+	return IRQ_HANDLED;
+}
+
+static int __devinit smx_ce_probe(struct platform_device *dev)
+{
+
+	int ret = -ENODEV;
+	struct uio_info *info;
+	struct resource *regs;
+
+	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+	if (!info)
+		return -ENOMEM;
+
+	regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!regs) {
+		dev_err(&dev->dev, "No memory resource specified\n");
+		goto out_free;
+	}
+
+	info->mem[0].addr = regs->start;
+	if (!info->mem[0].addr) {
+		dev_err(&dev->dev, "Invalid memory resource\n");
+		goto out_free;
+	}
+
+	info->mem[0].size = regs->end - regs->start + 1;
+	info->mem[0].internal_addr = ioremap(regs->start, info->mem[0].size);
+
+	if (!info->mem[0].internal_addr) {
+		dev_err(&dev->dev, "Can't remap memory address range\n");
+		goto out_free;
+	}
+
+	info->mem[0].memtype = UIO_MEM_PHYS;
+
+	info->name = "smx-ce";
+	info->version = "0.03";
+
+	info->irq = platform_get_irq(dev, 0);
+	if (info->irq < 0) {
+		ret = info->irq;
+		dev_err(&dev->dev, "No (or invalid) IRQ resource specified\n");
+		goto out_unmap;
+	}
+
+	info->irq_flags = IRQF_SHARED;
+	info->handler = smx_handler;
+
+	platform_set_drvdata(dev, info);
+
+	ret = uio_register_device(&dev->dev, info);
+
+	if (ret)
+		goto out_unmap;
+
+	return 0;
+
+out_unmap:
+	iounmap(info->mem[0].internal_addr);
+out_free:
+	kfree(info);
+
+	return ret;
+}
+
+static int __devexit smx_ce_remove(struct platform_device *dev)
+{
+	struct uio_info *info = platform_get_drvdata(dev);
+
+	uio_unregister_device(info);
+	platform_set_drvdata(dev, NULL);
+	iounmap(info->mem[0].internal_addr);
+
+	kfree(info);
+
+	return 0;
+}
+
+static struct platform_driver smx_ce_driver = {
+	.probe		= smx_ce_probe,
+	.remove		= __devexit_p(smx_ce_remove),
+	.driver		= {
+		.name	= DRV_NAME,
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init smx_ce_init_module(void)
+{
+	return platform_driver_register(&smx_ce_driver);
+}
+module_init(smx_ce_init_module);
+
+static void __exit smx_ce_exit_module(void)
+{
+	platform_driver_unregister(&smx_ce_driver);
+}
+module_exit(smx_ce_exit_module);
+
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRV_VERSION);
+MODULE_AUTHOR("Ben Nizette <bn@niasdigital.com>");