#include <modules.h>
#include <fs_devfs.h>
#include "common.h"
+#include <api_drv_disk.h>
// === CONSTANTS ===
+#define FDD_VERSION VER2(1,10)
// === STRUCTURES ===
// === PROTOTYPES ===
int FDD_Install(char **Arguments);
+ int FDD_RegisterFS(void);
+// --- VFS
+char *FDD_ReadDir(tVFS_Node *Node, int pos);
+tVFS_Node *FDD_FindDir(tVFS_Node *dirNode, const char *Name);
+ int FDD_IOCtl(tVFS_Node *Node, int ID, void *Data);
+Uint64 FDD_ReadFS(tVFS_Node *node, Uint64 off, Uint64 len, void *buffer);
// === GLOBALS ===
-MODULE_DEFINE(0, 0x110, Storage_FDDv2, FDD_Install, NULL, "x86_ISADMA", NULL);
+MODULE_DEFINE(0, FDD_VERSION, Storage_FDDv2, FDD_Install, NULL, "x86_ISADMA", NULL);
tDrive gaFDD_Disks[MAX_DISKS];
+tVFS_Node gaFDD_DiskNodes[MAX_DISKS];
+tDevFS_Driver gFDD_DriverInfo = {
+ NULL, "fdd",
+ {
+ .Size = -1,
+ .NumACLs = 1,
+ .ACLs = &gVFS_ACL_EveryoneRX,
+ .Flags = VFS_FFLAG_DIRECTORY,
+ .ReadDir = FDD_ReadDir,
+ .FindDir = FDD_FindDir,
+ .IOCtl = FDD_IOCtl
+ }
+ };
// === CODE ===
int FDD_Install(char **Arguments)
{
+ // Query CMOS memory
+ {
+ Uint8 data;
+ outb(0x70, 0x10);
+ data = inb(0x71);
+
+ // NOTE: CMOS only reports 2 disks
+ if( (data & 0xF0) == 0x40 )
+ gaFDD_Disks[0].bValid = gaFDD_Disks[0].bInserted = 1;
+ if( (data & 0x0F) == 0x04 )
+ gaFDD_Disks[1].bValid = gaFDD_Disks[1].bInserted = 1;
+
+ if( gaFDD_Disks[0].bValid == 0 && gaFDD_Disks[1].bValid == 0 )
+ return MODULE_ERR_NOTNEEDED;
+ }
+
+ // Initialise controller
+ FDD_SetupIO();
+
+ FDD_RegisterFS();
+
return 0;
}
+/**
+ * \brief Register the FDD driver with DevFS
+ */
+int FDD_RegisterFS(void)
+{
+ gFDD_DriverInfo.RootNode.CTime = gFDD_DriverInfo.RootNode.MTime
+ = gFDD_DriverInfo.RootNode.ATime = now();
+
+ for( int i = 0; i < MAX_DISKS; i ++ )
+ {
+ if( !gaFDD_Disks[i].bValid ) continue ;
+
+ // Initialise Child Nodes
+ gaFDD_DiskNodes[i].Inode = i;
+ gaFDD_DiskNodes[i].Flags = 0;
+ gaFDD_DiskNodes[i].NumACLs = 0;
+ gaFDD_DiskNodes[i].Read = FDD_ReadFS;
+ gaFDD_DiskNodes[i].Write = NULL;//FDD_WriteFS;
+ gaFDD_DiskNodes[i].Size = 1440*1024; // TODO: Non 1.44 disks
+ }
+
+ DevFS_AddDevice( &gFDD_DriverInfo );
+}
+
+/**
+ * \brief Get the name of the \a Pos th item in the driver root
+ * \param Node Root node (unused)
+ * \param Pos Position
+ * \return Heap string of node name
+ */
+char *FDD_ReadDir(tVFS_Node *Node, int Pos)
+{
+ char ret_tpl[2];
+ if(Pos < 0 || Pos > MAX_DISKS )
+ return NULL;
+ if(gaFDD_Disks[Pos].bValid)
+ return VFS_SKIP;
+
+ ret_tpl[0] = '0' + Pos;
+ ret_tpl[1] = '\0';
+ return strdup(ret_tpl);
+}
+
+/**
+ * \brief Get a node by name
+ * \param Node Root node (unused)
+ * \param Name Drive name
+ * \return Pointer to node structure
+ */
+tVFS_Node *FDD_FindDir(tVFS_Node *Node, const char *Name)
+{
+ int pos;
+ if( '0' > Name[0] || Name[0] > '9' ) return NULL;
+ if( Name[1] != '\0' ) return NULL;
+
+ pos = Name[0] - '0';
+
+ return &gaFDD_DiskNodes[pos];
+}
+
+static const char *casIOCTLS[] = {DRV_IOCTLNAMES,DRV_DISK_IOCTLNAMES,NULL};
+/**
+ * \brief Driver root IOCtl Handler
+ * \param Node Root node (unused)
+ * \param ID IOCtl ID
+ * \param Data IOCtl specific data pointer
+ */
+int FDD_IOCtl(tVFS_Node *Node, int ID, void *Data)
+{
+ switch(ID)
+ {
+ BASE_IOCTLS(DRV_TYPE_DISK, "FDDv2", FDD_VERSION, casIOCTLS);
+
+ case DISK_IOCTL_GETBLOCKSIZE: return 512;
+
+ default:
+ return -1;
+ }
+}
+
+/**
+ * \brief Read from a disk
+ * \param Node Disk node
+ * \param Offset Byte offset in disk
+ * \param Length Number of bytes to read
+ * \param Buffer Destination buffer
+ * \return Number of bytes read
+ */
+Uint64 FDD_ReadFS(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
+{
+ int disk = Node->Inode;
+ int track;
+
+ track = Offset / BYTES_PER_TRACK;
+
+ if( Offset % BYTES_PER_TRACK )
+ {
+
+ }
+}
+
+/**
+ * \brief Read from a track
+ */
+int FDD_int_ReadWriteWithinTrack(int Disk, int Track, int bWrite, size_t Offset, size_t Length, void *Buffer)
+{
+ if( Offset > BYTES_PER_TRACK || Length > BYTES_PER_TRACK )
+ return 1;
+ if( Offset + Length > BYTES_PER_TRACK )
+ return 1;
+
+ Mutex_Acquire( &gaFDD_Disks[Disk].Mutex );
+
+ // If the cache doesn't exist, create it
+ if( !gaFDD_Disks[Disk].TrackData[Track] )
+ {
+ gaFDD_Disks[Disk].TrackData[Track] = malloc( BYTES_PER_TRACK );
+ // Don't bother reading if this is a whole track write
+ if( !(bWrite && Offset == 0 && Length == BYTES_PER_TRACK) )
+ {
+ FDD_int_ReadWriteTrack(Disk, Track, 0, gaFDD_Disks[Disk].TrackData[Track]);
+ }
+ }
+
+ // Read/Write
+ if( bWrite )
+ {
+ // Write to cache then commit cache to disk
+ char *dest = gaFDD_Disks[Disk].TrackData[Track];
+ memcpy( dest + Offset, Buffer, Length );
+ FDD_int_ReadWriteTrack(Disk, Track, 1, gaFDD_Disks[Disk].TrackData[Track]);
+ }
+ else
+ {
+ // Read from cache
+ char *src = gaFDD_Disks[Disk].TrackData[Track];
+ memcpy(Buffer, src + Offset, Length);
+ }
+
+ Mutex_Release( &gaFDD_Disks[Disk].Mutex );
+
+ return 0;
+}
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au