devfs.h

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/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright 2001-2004, ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#ifndef __DEVFS_H__
#define __DEVFS_H__
 
#include <types.h>
#include <irx.h>
 
typedef s32 HDEV;
#define DEVFS_MAX_SUBDEVS 16
#define DEVFS_MAX_DEVNAME_LENGTH 32
#define DEVFS_MAX_DESC_LENGTH 256
 
enum devfs_subdev_modes
{
    DEVFS_MODE_EX = (1 << 0),
    DEVFS_MODE_W  = (1 << 1),
    DEVFS_MODE_R  = (1 << 2),
    DEVFS_MODE_RW = (DEVFS_MODE_R | DEVFS_MODE_W)
};
 
enum devfs_devtypes
{
    DEVFS_DEVTYPE_CHAR = 1,
    DEVFS_DEVTYPE_BLOCK = 2,
    DEVFS_DEVTYPE_STREAM = 3
};
 
#define DEVFS_IOCTL_TYPE_1  1
#define DEVFS_IOCTL_TYPE_2  2
 
#define DEVFS_IOCTL_GETDESC 0
 
typedef union
 
{
  u32 loc32[2];
  u64 loc64;
} devfs_loc_t;
 
typedef struct
 
{
  void *data;
  s32 subdev;
  u32 mode;
  devfs_loc_t loc;
} devfs_info_t;
 
typedef s32 (*read_handler)(const devfs_info_t *dev, u8 *buf, s32 len);
typedef s32 (*write_handler)(const devfs_info_t *dev, u8 *buf, s32 len);
typedef s32 (*ioctl_handler)(const devfs_info_t *dev, int ioctl_type, int cmd, void *arg,
                            size_t arglen, void *buf, size_t buflen);
 
typedef struct
{
   char *name;
   char *desc;
   s32  devtype;
   u32  blocksize;
   read_handler read;
   write_handler write;
   ioctl_handler ioctl;
} devfs_node_t;
 
extern HDEV DevFSAddDevice(const devfs_node_t *node);
extern int DevFSDelDevice(HDEV hDev);
 
extern int DevFSAddSubDevice(HDEV hDev, u32 subdev_no, s32 mode, devfs_loc_t extent, void *data);
 
extern int DevFSDelSubDevice(HDEV hDev, u32 subdev_no);
 
#define INVALID_HDEV -1
 
#define devfs_IMPORTS_start DECLARE_IMPORT_TABLE(devfs, 1, 1)
#define devfs_IMPORTS_end END_IMPORT_TABLE
 
#define I_DevFSAddDevice DECLARE_IMPORT(4, DevFSAddDevice)
#define I_DevFSDelDevice DECLARE_IMPORT(5, DevFSDelDevice)
#define I_DevFSAddSubDevice DECLARE_IMPORT(6, DevFSAddSubDevice)
#define I_DevFSDelSubDevice DECLARE_IMPORT(7, DevFSDelSubDevice)
 
#endif /* __DEVFS_H__ */