/*****************************************************************************************
Copyright (c) 2002-2004 The UbixOS Project
All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of
conditions, the following disclaimer and the list of authors. Redistributions in binary
form must reproduce the above copyright notice, this list of conditions, the following
disclaimer and the list of authors in the documentation and/or other materials provided
with the distribution. Neither the name of the UbixOS Project nor the names of its
contributors may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
$Id$
*****************************************************************************************/
#include <devfs/devfs.h>
#include <vfs/vfs.h>
#include <vfs/mount.h>
#include <sys/device.h>
#include <ubixos/types.h>
#include <ubixos/spinlock.h>
#include <lib/kmalloc.h>
#include <lib/string.h>
#include <lib/kprintf.h>
#include <assert.h>
/* Spinlock for devfs we should start converting to sem/mutex */
static spinLock_t devfsSpinLock = SPIN_LOCK_INITIALIZER;
int devfs_init() {
/* Build our devfs struct */
struct fileSystem devFS =
{NULL, /* prev */
NULL, /* next */
(void *)devFSInit, /* vfsInitFS */
(void *)devFSRead, /* vfsRead */
(void *)devFSWrite, /* vfsWrite */
(void *)devFSOpen, /* vfsOpenFile */
NULL, /* vfsUnlink */
NULL, /* vfsMakeDir */
NULL, /* vfsRemDir */
NULL, /* vfsSync */
1 /* vfsType */
}; /* devFS */
if (vfsRegisterFS(devFS) != 0x0) {
//sysErr(systemErr,"Unable To Enable DevFS");
return(0x1);
}
/* Mount our devfs this will build the devfs container node */
mount(0x0,0x0,0x0,0x1,"devfs","rw"); // Mount Device File System
/* Return */
return(0x0);
}
void devFSInit(struct mountPoints *mp) {
struct devFsInfo *fsInfo = 0x0;
/* Allocate memory for the fsInfo */
mp->fsInfo = (struct devFsInfo *)kmalloc(sizeof(struct devFsInfo));
assert(mp->fsInfo);
fsInfo = mp->fsInfo;
fsInfo->deviceList = 0x0;
kprintf("DevFS Initialized\n");
//Return
return;
}
int devFSOpen(char *file,fileDescriptor *fd) {
struct devFsInfo *fsInfo = fd->mp->fsInfo;
struct devFsDevices *tmpDev = 0x0;
struct deviceNode *device = 0x0;
spinLock(&devfsSpinLock);
for (tmpDev = fsInfo->deviceList;tmpDev != 0x0;tmpDev = tmpDev->next) {
if (strcmp(tmpDev->devName,file) == 0x0) {
switch ((fd->mode & 0x3)) {
case 0:
case 1:
device = deviceFind(tmpDev->devMajor,tmpDev->devMinor);
(void *)fd->start = tmpDev;
fd->size = device->size;
break;
default:
kprintf("Invalid File Mode\n");
spinUnlock(&devfsSpinLock);
return(-1);
break;
}
spinUnlock(&devfsSpinLock);
return(0x1);
}
}
spinUnlock(&devfsSpinLock);
return(0x0);
}
/************************************************************************
Function: int readDevFS(fileDescriptor *fd,char *data,long offset,long size)
Description: Read File Into Data
Notes:
************************************************************************/
int devFSRead(fileDescriptor *fd,char *data,long offset,long size) {
int i = 0x0,x = 0x0;
uInt32 sectors = 0x0;
uInt16 diff = 0x0;
struct deviceNode *device = 0x0;
struct devFsDevices *tmpDev = (void *)fd->start;
device = deviceFind(tmpDev->devMajor,tmpDev->devMinor);
sectors = ((size+511)/512);
diff = (offset - ((offset/512)*512));
for (i=0x0;i<sectors;i++) {
device->devInfo->read(device->devInfo->info,fd->buffer,i + (offset/512),1);
for (x=0x0;x<(size - (i*512));x++) {
if (diff > 0) {
data[x] = fd->buffer[x + diff];
}
else {
data[x] = fd->buffer[x];
}
}
diff = 0x0;
data += 512;
}
return(size);
}
/************************************************************************
Function: int writeDevFS(fileDescriptor *fd,char *data,long offset,long size)
Description: Write Data Into File
Notes:
************************************************************************/
int devFSWrite(fileDescriptor *fd,char *data,long offset,long size) {
int i = 0x0,x = 0x0;
struct deviceNode *device = 0x0;
struct devFsDevices *tmpDev = (void *)fd->start;
device = deviceFind(tmpDev->devMajor,tmpDev->devMinor);
for (i=0x0;i<((size+511)/512);i++) {
device->devInfo->read(device->devInfo->info,fd->buffer,i + (offset/512),1);
for (x=0x0;((x < 512) && ((x + (i * 512)) < size));x++) {
fd->buffer[x] = data[x];
}
device->devInfo->write(device->devInfo->info,fd->buffer,i + (offset/512),1);
data += 512;
}
return(size);
}
int devFsMkNod(char *name,uInt8 type,uInt16 major,uInt16 minor) {
struct mountPoints *mp = 0x0;
struct devFsInfo *fsInfo = 0x0;
struct devFsDevices *tmpDev = 0x0;
spinLock(&devfsSpinLock);
mp = findMount("devfs");
if (mp == 0x0) {
kprintf("Error: Can't Find Mount Point\n");
spinUnlock(&devfsSpinLock);
return(-1);
}
fsInfo = mp->fsInfo;
tmpDev = (struct devFsDevices *)kmalloc(sizeof(struct devFsDevices));
tmpDev->devType = type;
tmpDev->devMajor = major;
tmpDev->devMinor = minor;
sprintf(tmpDev->devName,name);
tmpDev->next = fsInfo->deviceList;
tmpDev->prev = 0x0;
if (fsInfo->deviceList != 0x0) {
fsInfo->deviceList->prev = tmpDev;
}
fsInfo->deviceList = tmpDev;
spinUnlock(&devfsSpinLock);
return(0x0);
}
/***
$Log$
Revision 1.12 2004/07/16 20:17:29 flameshadow
chg: broke the ufs stuff
chg: changed vfsRegisterFS() to accept a fileSystem struct
chg: modified calls to vfsRegisterFS() to pass fileSystem struct
Revision 1.11 2004/07/14 12:17:52 reddawg
devfs: devFSEnable to devfs_init
Changed Startup Routines
Revision 1.10 2004/06/28 23:12:58 reddawg
file format now container:/path/to/file
Revision 1.9 2004/05/26 11:55:25 reddawg
devfs: Added spin locks to fix some possible reentrant issues
Revision 1.8 2004/05/19 15:31:27 reddawg
Fixed up the rest of the references
Revision 1.7 2004/05/19 04:07:42 reddawg
kmalloc(size,pid) no more it is no kmalloc(size); the way it should of been
Revision 1.6 2004/04/28 21:10:40 reddawg
Lots Of changes to make it work with existing os
Revision 1.5 2004/04/28 03:05:35 reddawg
Cleaned up some debug'n code
Revision 1.4 2004/04/28 02:37:34 reddawg
More updates for using the new driver subsystem
Revision 1.3 2004/04/28 02:22:54 reddawg
This is a fiarly large commit but we are starting to use new driver model
all around
Revision 1.2 2004/04/26 22:22:33 reddawg
DevFS now uses correct size of device
Revision 1.1.1.1 2004/04/15 12:06:54 reddawg
UbixOS v1.0
Revision 1.3 2004/04/13 16:36:33 reddawg
Changed our copyright, it is all now under a BSD-Style license
END
***/
