diff options
Diffstat (limited to 'include/linux/ioport.h')
| -rw-r--r-- | include/linux/ioport.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h new file mode 100644 index 00000000000..18d010bee63 --- /dev/null +++ b/include/linux/ioport.h @@ -0,0 +1,127 @@ +/* + * 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> +/* + * Resources are tree-like, allowing + * nesting etc.. + */ +struct resource { + const char *name; + unsigned long start, end; + 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) + +/* 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 */ + +/* 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 struct resource * ____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, + unsigned long size, + unsigned long min, unsigned long max, + unsigned long align, + void (*alignf)(void *, struct resource *, + unsigned long, unsigned long), + void *alignf_data); +int adjust_resource(struct resource *res, unsigned long start, + unsigned long 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 *, unsigned long start, unsigned long 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 *, unsigned long, unsigned long); +extern void __release_region(struct resource *, unsigned long, unsigned long); + +static inline int __deprecated check_region(unsigned long s, unsigned long n) +{ + return __check_region(&ioport_resource, s, n); +} +#endif /* _LINUX_IOPORT_H */ |