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/* $Id$
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1992 - 1997, 2000 Silicon Graphics, Inc.
* Copyright (C) 2000 by Colin Ngam
*/
#ifndef _ASM_SN_PIO_H
#define _ASM_SN_PIO_H
#include <linux/types.h>
#include <asm/sn/sgi.h>
#include <asm/sn/iobus.h>
/*
* pioaddr_t - The kernel virtual address that a PIO can be done upon.
* Should probably be (volatile void*) but EVEREST would do PIO
* to long mostly, just cast for other sizes.
*/
typedef volatile ulong* pioaddr_t;
/*
* iopaddr_t - the physical io space relative address (e.g. VME A16S 0x0800).
* iosapce_t - specifies the io address space to be mapped/accessed.
* piomap_t - the handle returned by pio_alloc() and used with all the pio
* access functions.
*/
typedef struct piomap {
uint pio_bus;
uint pio_adap;
#ifdef LATER
iospace_t pio_iospace;
#endif
int pio_flag;
int pio_reg;
char pio_name[7]; /* to identify the mapped device */
struct piomap *pio_next; /* dlist to link active piomap's */
struct piomap *pio_prev; /* for debug and error reporting */
#ifdef LATER
void (*pio_errfunc)(); /* Pointer to an error function */
/* Used only for piomaps allocated
* in user level vme driver */
#endif
iopaddr_t pio_iopmask; /* valid iop address bit mask */
iobush_t pio_bushandle; /* bus-level handle */
} piomap_t;
#define pio_type pio_iospace.ios_type
#define pio_iopaddr pio_iospace.ios_iopaddr
#define pio_size pio_iospace.ios_size
#define pio_vaddr pio_iospace.ios_vaddr
/* Macro to get/set PIO error function */
#define pio_seterrf(p,f) (p)->pio_errfunc = (f)
#define pio_geterrf(p) (p)->pio_errfunc
/*
* pio_mapalloc() - allocates a handle that specifies a mapping from kernel
* virtual to io space. The returned handle piomap is used
* with the access functions to make sure that the mapping
* to the iospace exists.
* pio_mapfree() - frees the mapping as specified in the piomap handle.
* pio_mapaddr() - returns the kv address that maps to piomap'ed io address.
*/
#ifdef LATER
extern piomap_t *pio_mapalloc(uint,uint,iospace_t*,int,char*);
extern void pio_mapfree(piomap_t*);
extern caddr_t pio_mapaddr(piomap_t*,iopaddr_t);
extern piomap_t *pio_ioaddr(int, iobush_t, iopaddr_t, piomap_t *);
/*
* PIO access functions.
*/
extern int pio_badaddr(piomap_t*,iopaddr_t,int);
extern int pio_badaddr_val(piomap_t*,iopaddr_t,int,void*);
extern int pio_wbadaddr(piomap_t*,iopaddr_t,int);
extern int pio_wbadaddr_val(piomap_t*,iopaddr_t,int,int);
extern int pio_bcopyin(piomap_t*,iopaddr_t,void *,int, int, int);
extern int pio_bcopyout(piomap_t*,iopaddr_t,void *,int, int, int);
/*
* PIO RMW functions using piomap.
*/
extern void pio_orb_rmw(piomap_t*, iopaddr_t, unsigned char);
extern void pio_orh_rmw(piomap_t*, iopaddr_t, unsigned short);
extern void pio_orw_rmw(piomap_t*, iopaddr_t, unsigned long);
extern void pio_andb_rmw(piomap_t*, iopaddr_t, unsigned char);
extern void pio_andh_rmw(piomap_t*, iopaddr_t, unsigned short);
extern void pio_andw_rmw(piomap_t*, iopaddr_t, unsigned long);
/*
* Old RMW function interface
*/
extern void orb_rmw(volatile void*, unsigned int);
extern void orh_rmw(volatile void*, unsigned int);
extern void orw_rmw(volatile void*, unsigned int);
extern void andb_rmw(volatile void*, unsigned int);
extern void andh_rmw(volatile void*, unsigned int);
extern void andw_rmw(volatile void*, unsigned int);
#endif /* LATER */
/*
* piomap_t type defines
*/
#define PIOMAP_NTYPES 7
#define PIOMAP_A16N VME_A16NP
#define PIOMAP_A16S VME_A16S
#define PIOMAP_A24N VME_A24NP
#define PIOMAP_A24S VME_A24S
#define PIOMAP_A32N VME_A32NP
#define PIOMAP_A32S VME_A32S
#define PIOMAP_A64 6
#define PIOMAP_EISA_IO 0
#define PIOMAP_EISA_MEM 1
#define PIOMAP_PCI_IO 0
#define PIOMAP_PCI_MEM 1
#define PIOMAP_PCI_CFG 2
#define PIOMAP_PCI_ID 3
/* IBUS piomap types */
#define PIOMAP_FCI 0
/* dang gio piomap types */
#define PIOMAP_GIO32 0
#define PIOMAP_GIO64 1
#define ET_MEM 0
#define ET_IO 1
#define LAN_RAM 2
#define LAN_IO 3
#define PIOREG_NULL -1
/* standard flags values for pio_map routines,
* including {xtalk,pciio}_piomap calls.
* NOTE: try to keep these in step with DMAMAP flags.
*/
#define PIOMAP_UNFIXED 0x0
#define PIOMAP_FIXED 0x1
#define PIOMAP_NOSLEEP 0x2
#define PIOMAP_INPLACE 0x4
#define PIOMAP_FLAGS 0x7
#endif /* _ASM_SN_PIO_H */
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