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/*

 * ioport.h     Definitions of routines for detecting, reserving and

 *              allocating system resources.

 *

 * Authors:     Linus Torvalds

 */

#ifndef _LINUX_IOPORT_H

#define _LINUX_IOPORT_H

#include <linux/compiler.h>

#include <linux/types.h>

/*

 * Resources are tree-like, allowing

 * nesting etc..

 */

struct resource {

        resource_size_t start;

        resource_size_t end;

        const char *name;

        unsigned long flags;

        struct resource *parent, *sibling, *child;

};

struct resource_list {

        struct resource_list *next;

        struct resource *res;

        struct pci_dev *dev;

};

/*

 * IO resources have these defined flags.

 */

#define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */

#define IORESOURCE_IO           0x00000100      /* Resource type */

#define IORESOURCE_MEM          0x00000200

#define IORESOURCE_IRQ          0x00000400

#define IORESOURCE_DMA          0x00000800

#define IORESOURCE_PREFETCH     0x00001000      /* No side effects */

#define IORESOURCE_READONLY     0x00002000

#define IORESOURCE_CACHEABLE    0x00004000

#define IORESOURCE_RANGELENGTH  0x00008000

#define IORESOURCE_SHADOWABLE   0x00010000

#define IORESOURCE_BUS_HAS_VGA  0x00080000

#define IORESOURCE_DISABLED     0x10000000

#define IORESOURCE_UNSET        0x20000000

#define IORESOURCE_AUTO         0x40000000

#define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */

/* ISA PnP IRQ specific bits (IORESOURCE_BITS) */

#define IORESOURCE_IRQ_HIGHEDGE         (1<<0)

#define IORESOURCE_IRQ_LOWEDGE          (1<<1)

#define IORESOURCE_IRQ_HIGHLEVEL        (1<<2)

#define IORESOURCE_IRQ_LOWLEVEL         (1<<3)

#define IORESOURCE_IRQ_SHAREABLE        (1<<4)

/* ISA PnP DMA specific bits (IORESOURCE_BITS) */

#define IORESOURCE_DMA_TYPE_MASK        (3<<0)

#define IORESOURCE_DMA_8BIT             (0<<0)

#define IORESOURCE_DMA_8AND16BIT        (1<<0)

#define IORESOURCE_DMA_16BIT            (2<<0)

#define IORESOURCE_DMA_MASTER           (1<<2)

#define IORESOURCE_DMA_BYTE             (1<<3)

#define IORESOURCE_DMA_WORD             (1<<4)

#define IORESOURCE_DMA_SPEED_MASK       (3<<6)

#define IORESOURCE_DMA_COMPATIBLE       (0<<6)

#define IORESOURCE_DMA_TYPEA            (1<<6)

#define IORESOURCE_DMA_TYPEB            (2<<6)

#define IORESOURCE_DMA_TYPEF            (3<<6)

/* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */

#define IORESOURCE_MEM_WRITEABLE        (1<<0)  /* dup: IORESOURCE_READONLY */

#define IORESOURCE_MEM_CACHEABLE        (1<<1)  /* dup: IORESOURCE_CACHEABLE */

#define IORESOURCE_MEM_RANGELENGTH      (1<<2)  /* dup: IORESOURCE_RANGELENGTH */

#define IORESOURCE_MEM_TYPE_MASK        (3<<3)

#define IORESOURCE_MEM_8BIT             (0<<3)

#define IORESOURCE_MEM_16BIT            (1<<3)

#define IORESOURCE_MEM_8AND16BIT        (2<<3)

#define IORESOURCE_MEM_32BIT            (3<<3)

#define IORESOURCE_MEM_SHADOWABLE       (1<<5)  /* dup: IORESOURCE_SHADOWABLE */

#define IORESOURCE_MEM_EXPANSIONROM     (1<<6)

/* PCI ROM control bits (IORESOURCE_BITS) */

#define IORESOURCE_ROM_ENABLE           (1<<0)  /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */

#define IORESOURCE_ROM_SHADOW           (1<<1)  /* ROM is copy at C000:0 */

#define IORESOURCE_ROM_COPY             (1<<2)  /* ROM is alloc'd copy, resource field overlaid */

#define IORESOURCE_ROM_BIOS_COPY        (1<<3)  /* ROM is BIOS copy, resource field overlaid */

/* PCI control bits.  Shares IORESOURCE_BITS with above PCI ROM.  */

#define IORESOURCE_PCI_FIXED            (1<<4)  /* Do not move resource */

/* PC/ISA/whatever - the normal PC address spaces: IO and memory */

extern struct resource ioport_resource;

extern struct resource iomem_resource;

extern int request_resource(struct resource *root, struct resource *new);

extern int release_resource(struct resource *new);

extern int insert_resource(struct resource *parent, struct resource *new);

extern int allocate_resource(struct resource *root, struct resource *new,

                             resource_size_t size, resource_size_t min,

                             resource_size_t max, resource_size_t align,

                             void (*alignf)(void *, struct resource *,

                                            resource_size_t, resource_size_t),

                             void *alignf_data);

int adjust_resource(struct resource *res, resource_size_t start,

                    resource_size_t size);

/* Convenience shorthand with allocation */

#define request_region(start,n,name)    __request_region(&ioport_resource, (start), (n), (name))

#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))

#define rename_region(region, newname) do { (region)->name = (newname); } while (0)

extern struct resource * __request_region(struct resource *,

                                        resource_size_t start,

                                        resource_size_t n, const char *name);

/* Compatibility cruft */

#define release_region(start,n) __release_region(&ioport_resource, (start), (n))

#define check_mem_region(start,n)       __check_region(&iomem_resource, (start), (n))

#define release_mem_region(start,n)     __release_region(&iomem_resource, (start), (n))

extern int __check_region(struct resource *, resource_size_t, resource_size_t);

extern void __release_region(struct resource *, resource_size_t,

                                resource_size_t);

static inline int __deprecated check_region(resource_size_t s,

                                                resource_size_t n)

{

        return __check_region(&ioport_resource, s, n);

}

/* Wrappers for managed devices */

struct device;

#define devm_request_region(dev,start,n,name) \

        __devm_request_region(dev, &ioport_resource, (start), (n), (name))

#define devm_request_mem_region(dev,start,n,name) \

        __devm_request_region(dev, &iomem_resource, (start), (n), (name))

extern struct resource * __devm_request_region(struct device *dev,

                                struct resource *parent, resource_size_t start,

                                resource_size_t n, const char *name);

#define devm_release_region(start,n) \

        __devm_release_region(dev, &ioport_resource, (start), (n))

#define devm_release_mem_region(start,n) \

        __devm_release_region(dev, &iomem_resource, (start), (n))

extern void __devm_release_region(struct device *dev, struct resource *parent,

                                  resource_size_t start, resource_size_t n);

#endif  /* _LINUX_IOPORT_H */