Edit File: uio_driver.h
/* * 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/device.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; int vma_count; struct uio_info *info; struct mutex info_lock; 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 #define UIO_MEM_IOVA 4 /* 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_ */