Initial import

1 files changed, 138 insertions, 0 deletions

diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h
new file mode 100644
index 000000000..32c0e83d6
--- /dev/null
+++ b/include/linux/uio_driver.h
@@ -0,0 +1,138 @@
+/*
+ * include/linux/uio_driver.h
+ *
+ * Copyright(C) 2005, Benedikt Spranger <b.spranger@linutronix.de>
+ * Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de>
+ * Copyright(C) 2006, Hans J. Koch <hjk@hansjkoch.de>
+ * Copyright(C) 2006, Greg Kroah-Hartman <greg@kroah.com>
+ *
+ * Userspace IO driver.
+ *
+ * Licensed under the GPLv2 only.
+ */
+
+#ifndef _UIO_DRIVER_H_
+#define _UIO_DRIVER_H_
+
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+
+struct module;
+struct uio_map;
+
+/**
+ * struct uio_mem - description of a UIO memory region
+ * @name:		name of the memory region for identification
+ * @addr:		address of the device's memory (phys_addr is used since
+ * 			addr can be logical, virtual, or physical & phys_addr_t
+ * 			should always be large enough to handle any of the
+ * 			address types)
+ * @size:		size of IO
+ * @memtype:		type of memory addr points to
+ * @internal_addr:	ioremap-ped version of addr, for driver internal use
+ * @map:		for use by the UIO core only.
+ */
+struct uio_mem {
+	const char		*name;
+	phys_addr_t		addr;
+	resource_size_t		size;
+	int			memtype;
+	void __iomem		*internal_addr;
+	struct uio_map		*map;
+};
+
+#define MAX_UIO_MAPS	5
+
+struct uio_portio;
+
+/**
+ * struct uio_port - description of a UIO port region
+ * @name:		name of the port region for identification
+ * @start:		start of port region
+ * @size:		size of port region
+ * @porttype:		type of port (see UIO_PORT_* below)
+ * @portio:		for use by the UIO core only.
+ */
+struct uio_port {
+	const char		*name;
+	unsigned long		start;
+	unsigned long		size;
+	int			porttype;
+	struct uio_portio	*portio;
+};
+
+#define MAX_UIO_PORT_REGIONS	5
+
+struct uio_device {
+        struct module           *owner;
+        struct device           *dev;
+        int                     minor;
+        atomic_t                event;
+        struct fasync_struct    *async_queue;
+        wait_queue_head_t       wait;
+        struct uio_info         *info;
+        struct kobject          *map_dir;
+        struct kobject          *portio_dir;
+};
+
+/**
+ * struct uio_info - UIO device capabilities
+ * @uio_dev:		the UIO device this info belongs to
+ * @name:		device name
+ * @version:		device driver version
+ * @mem:		list of mappable memory regions, size==0 for end of list
+ * @port:		list of port regions, size==0 for end of list
+ * @irq:		interrupt number or UIO_IRQ_CUSTOM
+ * @irq_flags:		flags for request_irq()
+ * @priv:		optional private data
+ * @handler:		the device's irq handler
+ * @mmap:		mmap operation for this uio device
+ * @open:		open operation for this uio device
+ * @release:		release operation for this uio device
+ * @irqcontrol:		disable/enable irqs when 0/1 is written to /dev/uioX
+ */
+struct uio_info {
+	struct uio_device	*uio_dev;
+	const char		*name;
+	const char		*version;
+	struct uio_mem		mem[MAX_UIO_MAPS];
+	struct uio_port		port[MAX_UIO_PORT_REGIONS];
+	long			irq;
+	unsigned long		irq_flags;
+	void			*priv;
+	irqreturn_t (*handler)(int irq, struct uio_info *dev_info);
+	int (*mmap)(struct uio_info *info, struct vm_area_struct *vma);
+	int (*open)(struct uio_info *info, struct inode *inode);
+	int (*release)(struct uio_info *info, struct inode *inode);
+	int (*irqcontrol)(struct uio_info *info, s32 irq_on);
+};
+
+extern int __must_check
+	__uio_register_device(struct module *owner,
+			      struct device *parent,
+			      struct uio_info *info);
+
+/* use a define to avoid include chaining to get THIS_MODULE */
+#define uio_register_device(parent, info) \
+	__uio_register_device(THIS_MODULE, parent, info)
+
+extern void uio_unregister_device(struct uio_info *info);
+extern void uio_event_notify(struct uio_info *info);
+
+/* defines for uio_info->irq */
+#define UIO_IRQ_CUSTOM	-1
+#define UIO_IRQ_NONE	0
+
+/* defines for uio_mem->memtype */
+#define UIO_MEM_NONE	0
+#define UIO_MEM_PHYS	1
+#define UIO_MEM_LOGICAL	2
+#define UIO_MEM_VIRTUAL 3
+
+/* defines for uio_port->porttype */
+#define UIO_PORT_NONE	0
+#define UIO_PORT_X86	1
+#define UIO_PORT_GPIO	2
+#define UIO_PORT_OTHER	3
+
+#endif /* _LINUX_UIO_DRIVER_H_ */