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Diffstat (limited to 'include/linux/exm_driver.h')
| -rw-r--r-- | include/linux/exm_driver.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/include/linux/exm_driver.h b/include/linux/exm_driver.h new file mode 100644 index 000000000..31ac5b60e --- /dev/null +++ b/include/linux/exm_driver.h @@ -0,0 +1,126 @@ +/* + * 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 _EXM_DRIVER_H_ +#define _EXM_DRIVER_H_ + +#include <linux/fs.h> +#include <linux/interrupt.h> + +struct module; +struct exm_map; + +/** + * struct exm_mem - description of a EXM 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 EXM core only. + */ +struct exm_mem { + const char *name; + phys_addr_t addr; + unsigned long size; + int memtype; + void __iomem *internal_addr; + struct exm_map *map; +}; + +#define MAX_EXM_MAPS 5 + +struct exm_portio; + +/** + * struct exm_port - description of a EXM 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 EXM_PORT_* below) + * @portio: for use by the EXM core only. + */ +struct exm_port { + const char *name; + unsigned long start; + unsigned long size; + int porttype; + struct exm_portio *portio; +}; + +#define MAX_EXM_PORT_REGIONS 5 + +struct exm_device; + +/** + * struct exm_info - EXM device capabilities + * @exm_dev: the EXM 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 EXM_IRQ_CUSTOM + * @irq_flags: flags for request_irq() + * @priv: optional private data + * @handler: the device's irq handler + * @mmap: mmap operation for this exm device + * @open: open operation for this exm device + * @release: release operation for this exm device + * @irqcontrol: disable/enable irqs when 0/1 is written to /dev/exmX + */ +struct exm_info { + struct exm_device *exm_dev; + const char *name; + const char *version; + struct exm_mem mem[MAX_EXM_MAPS]; + struct exm_port port[MAX_EXM_PORT_REGIONS]; + long irq; + unsigned long irq_flags; + void *priv; + irqreturn_t(*handler) (int irq, struct exm_info *dev_info); + int (*mmap) (struct exm_info *info, struct vm_area_struct *vma); + int (*open) (struct exm_info *info, struct inode *inode); + int (*release) (struct exm_info *info, struct inode *inode); + int (*irqcontrol) (struct exm_info *info, s32 irq_on); +}; + +extern int __must_check +__exm_register_device(struct module *owner, struct device *parent, struct exm_info *info); + +/* use a define to avoid include chaining to get THIS_MODULE */ +#define exm_register_device(parent, info) \ + __exm_register_device(THIS_MODULE, parent, info) + +extern void exm_unregister_device(struct exm_info *info); +extern void exm_event_notify(struct exm_info *info); + +/* defines for exm_info->irq */ +#define EXM_IRQ_CUSTOM -1 +#define EXM_IRQ_NONE 0 + +/* defines for exm_mem->memtype */ +#define EXM_MEM_NONE 0 +#define EXM_MEM_PHYS 1 +#define EXM_MEM_LOGICAL 2 +#define EXM_MEM_VIRTUAL 3 + +/* defines for exm_port->porttype */ +#define EXM_PORT_NONE 0 +#define EXM_PORT_X86 1 +#define EXM_PORT_GPIO 2 +#define EXM_PORT_OTHER 3 + +#endif /* _LINUX_EXM_DRIVER_H_ */ |