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device-bdm.c
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device-bdm.c
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/*
Copyright 2009-2010, jimmikaelkael
Licenced under Academic Free License version 3.0
Review Open PS2 Loader README & LICENSE files for further details.
*/
#include "internal.h"
#include <bdm.h>
#include "device.h"
extern struct cdvdman_settings_bdm cdvdman_settings;
static struct block_device *g_bd = NULL;
static u32 g_bd_sectors_per_sector = 4;
static int bdm_io_sema;
extern struct irx_export_table _exp_bdm;
//
// BDM exported functions
//
void bdm_connect_bd(struct block_device *bd)
{
DPRINTF("connecting device %s%dp%d\n", bd->name, bd->devNr, bd->parNr);
if (g_bd == NULL) {
g_bd = bd;
g_bd_sectors_per_sector = (2048 / bd->sectorSize);
// Free usage of block device
SignalSema(bdm_io_sema);
}
}
void bdm_disconnect_bd(struct block_device *bd)
{
DPRINTF("disconnecting device %s%dp%d\n", bd->name, bd->devNr, bd->parNr);
// Lock usage of block device
WaitSema(bdm_io_sema);
if (g_bd == bd)
g_bd = NULL;
}
//
// cdvdman "Device" functions
//
void DeviceInit(void)
{
iop_sema_t smp;
DPRINTF("%s\n", __func__);
// Create semaphore, initially locked
smp.initial = 0;
smp.max = 1;
smp.option = 0;
smp.attr = SA_THPRI;
bdm_io_sema = CreateSema(&smp);
RegisterLibraryEntries(&_exp_bdm);
}
void DeviceDeinit(void)
{
DPRINTF("%s\n", __func__);
}
void DeviceStop(void)
{
DPRINTF("%s\n", __func__);
if (g_bd != NULL)
g_bd->stop(g_bd);
}
void DeviceFSInit(void)
{
int i;
DPRINTF("USB: NumParts = %d\n", cdvdman_settings.common.NumParts);
for (i = 0; i < cdvdman_settings.common.NumParts; i++)
DPRINTF("USB: LBAs[%d] = %lu\n", i, cdvdman_settings.LBAs[i]);
DPRINTF("Waiting for device...\n");
WaitSema(bdm_io_sema);
DPRINTF("Waiting for device...done!\n");
SignalSema(bdm_io_sema);
}
void DeviceLock(void)
{
DPRINTF("%s\n", __func__);
WaitSema(bdm_io_sema);
}
void DeviceUnmount(void)
{
DPRINTF("%s\n", __func__);
}
int DeviceReadSectors(u32 lsn, void *buffer, unsigned int sectors)
{
u32 sector;
u16 count;
register u32 r, sectors_to_read, lbound, ubound, nlsn, offslsn;
register int i, esc_flag = 0;
u8 *p = (u8 *)buffer;
//DPRINTF("%s(%u, 0x%p, %u)\n", __func__, (unsigned int)lsn, buffer, sectors);
lbound = 0;
ubound = (cdvdman_settings.common.NumParts > 1) ? 0x80000 : 0xFFFFFFFF;
offslsn = lsn;
r = nlsn = 0;
sectors_to_read = sectors;
WaitSema(bdm_io_sema);
for (i = 0; i < cdvdman_settings.common.NumParts; i++, lbound = ubound, ubound += 0x80000, offslsn -= 0x80000) {
if (lsn >= lbound && lsn < ubound) {
if ((lsn + sectors) > (ubound - 1)) {
sectors_to_read = ubound - lsn;
sectors -= sectors_to_read;
nlsn = ubound;
} else
esc_flag = 1;
sector = cdvdman_settings.LBAs[i] + (offslsn * g_bd_sectors_per_sector);
count = sectors_to_read * g_bd_sectors_per_sector;
g_bd->read(g_bd, sector, &p[r], count);
r += sectors_to_read * 2048;
offslsn += sectors_to_read;
sectors_to_read = sectors;
lsn = nlsn;
}
if (esc_flag)
break;
}
SignalSema(bdm_io_sema);
return 0;
}
//
// oplutils exported function, used by MCEMU
//
void bdm_readSector(unsigned int lba, unsigned short int nsectors, unsigned char *buffer)
{
DPRINTF("%s\n", __func__);
WaitSema(bdm_io_sema);
g_bd->read(g_bd, lba, buffer, nsectors);
SignalSema(bdm_io_sema);
}
void bdm_writeSector(unsigned int lba, unsigned short int nsectors, const unsigned char *buffer)
{
DPRINTF("%s\n", __func__);
WaitSema(bdm_io_sema);
g_bd->write(g_bd, lba, buffer, nsectors);
SignalSema(bdm_io_sema);
}