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#include "libultra_internal.h"
#include "controller.h"
u16 __osSumcalc(u8* ptr, int length) {
int i;
u32 sum;
u8* tmp;
sum = 0;
tmp = ptr;
for (i = 0; i < length; i++) {
sum += *tmp++;
sum &= 0xffff;
}
return sum;
}
s32 __osIdCheckSum(u16* ptr, u16* csum, u16* icsum) {
u16 data;
u32 j;
data = 0;
*icsum = 0;
*csum = *icsum;
for (j = 0; j < 28; j += 2) {
// feels like this should be a compiler optimization not manual..
// but it doesn't match and I'm pretty sure this is just -O1
data = *(u16*) ((u8*) ptr + j);
// data = ptr[j]
*csum += data;
*icsum += ~data;
}
return 0;
}
s32 __osRepairPackId(OSPfs* pfs, __OSPackId* badid, __OSPackId* newid) {
s32 ret;
u8 temp[32];
u8 comp[32];
u8 mask;
int i;
int j;
u16 index[4];
ret = 0;
mask = 0;
SET_ACTIVEBANK_TO_ZERO;
newid->repaired = -1;
newid->random = osGetCount();
newid->serial_mid = badid->serial_mid;
newid->serial_low = badid->serial_low;
for (j = 0; j < PFS_MAX_BANKS;) {
pfs->activebank = j;
ERRCK(__osPfsSelectBank(pfs))
//! @todo fix magic number
ERRCK(__osContRamRead(pfs->queue, pfs->channel, 0, (u8*) &temp));
temp[0] = j | 0x80;
for (i = 1; i < ARRLEN(temp); i++) {
temp[i] = ~temp[i];
}
ERRCK(__osContRamWrite(pfs->queue, pfs->channel, 0, (u8*) temp, false)); // oddr 0, don't force
ERRCK(__osContRamRead(pfs->queue, pfs->channel, 0, (u8*) &comp));
for (i = 0; i < ARRLEN(temp); i++) {
if (comp[i] != temp[i]) {
break;
}
}
if (i != ARRLEN(temp)) {
break;
}
if (j > 0) {
pfs->activebank = 0;
ERRCK(__osPfsSelectBank(pfs));
ERRCK(__osContRamRead(pfs->queue, pfs->channel, 0, (u8*) temp));
if (temp[0] != 128) {
//! @todo remove magic constant
break;
}
}
j++;
}
pfs->activebank = 0;
ERRCK(__osPfsSelectBank(pfs));
if (j > 0) {
mask = 1;
} else {
mask = 0;
}
newid->deviceid = (badid->deviceid & (u16) ~1) | mask;
newid->banks = j;
newid->version = badid->version;
__osIdCheckSum((u16*) newid, &newid->checksum, &newid->inverted_checksum);
index[0] = 1;
index[1] = 3;
index[2] = 4;
index[3] = 6;
for (i = 0; i < ARRLEN(index); i++) {
ERRCK(__osContRamWrite(pfs->queue, pfs->channel, index[i], (u8*) newid, true));
}
ERRCK(__osContRamRead(pfs->queue, pfs->channel, 1, (u8*) temp));
for (i = 0; i < ARRLEN(temp); i++) {
if (temp[i] != ((u8*) newid)[i]) {
return PFS_ERR_ID_FATAL;
}
}
return 0;
}
s32 __osCheckPackId(OSPfs* pfs, __OSPackId* temp) {
u16 index[4];
s32 ret;
u16 sum;
u16 isum;
int i;
int j;
ret = 0;
SET_ACTIVEBANK_TO_ZERO;
index[0] = 1;
index[1] = 3;
index[2] = 4;
index[3] = 6;
for (i = 1; i < ARRLEN(index); i++) {
ERRCK(__osContRamRead(pfs->queue, pfs->channel, index[i], (u8*) temp));
__osIdCheckSum((u16*) temp, &sum, &isum);
if (temp->checksum == sum && temp->inverted_checksum == isum) {
break;
}
}
if (i == ARRLEN(index)) {
return PFS_ERR_ID_FATAL;
}
for (j = 0; j < ARRLEN(index); j++) {
if (j != i) {
ERRCK(__osContRamWrite(pfs->queue, pfs->channel, index[j], (u8*) temp, true));
}
}
return 0;
}
s32 __osGetId(OSPfs* pfs) {
int k;
u16 sum;
u16 isum;
u8 temp[32];
__OSPackId newid;
s32 ret;
__OSPackId* id;
SET_ACTIVEBANK_TO_ZERO;
ERRCK(__osContRamRead(pfs->queue, pfs->channel, 1, (u8*) temp));
__osIdCheckSum((u16*) temp, &sum, &isum);
id = (__OSPackId*) temp;
if (id->checksum != sum || id->inverted_checksum != isum) {
ret = __osCheckPackId(pfs, id);
if (ret == PFS_ERR_ID_FATAL) {
ERRCK(__osRepairPackId(pfs, id, &newid));
id = &newid;
} else if (ret != 0) {
return ret;
}
}
//! @todo remove magic constant
if ((id->deviceid & 1) == 0) {
ERRCK(__osRepairPackId(pfs, id, &newid));
id = &newid;
if ((id->deviceid & 1) == 0) {
return PFS_ERR_DEVICE;
}
}
for (k = 0; k < ARRLEN(pfs->id); k++) {
pfs->id[k] = ((u8*) id)[k];
}
pfs->version = id->version;
pfs->banks = id->banks;
//! @todo loads of magic constants..
pfs->inode_start_page = pfs->banks * 2 + 3;
pfs->dir_size = 16;
pfs->inode_table = 8;
pfs->minode_table = pfs->banks * PFS_ONE_PAGE + 8;
pfs->dir_table = pfs->minode_table + pfs->banks * PFS_ONE_PAGE;
ERRCK(__osContRamRead(pfs->queue, pfs->channel, 7, pfs->label));
return 0;
}
s32 __osCheckId(OSPfs* pfs) {
int k;
u8 temp[32];
s32 ret;
SET_ACTIVEBANK_TO_ZERO;
ret = __osContRamRead(pfs->queue, pfs->channel, 1, (u8*) temp);
if (ret != 0) {
if (ret != 2) {
return ret;
} else {
ERRCK(__osContRamRead(pfs->queue, pfs->channel, 1, (u8*) temp));
}
}
for (k = 0; k < ARRLEN(temp); k++) {
if (pfs->id[k] != temp[k]) {
return PFS_ERR_NEW_PACK;
}
}
return 0;
}
s32 __osPfsRWInode(OSPfs* pfs, __OSInode* inode, u8 flag, u8 bank) {
u8 sum;
int j;
s32 ret;
int offset;
u8* addr;
SET_ACTIVEBANK_TO_ZERO;
if (bank > 0) {
offset = 1;
} else {
offset = pfs->inode_start_page;
}
if (flag == PFS_WRITE) {
inode->inode_page[0].inode_t.page = __osSumcalc((u8*) &inode->inode_page[offset], (-offset) * 2 + 256);
}
for (j = 0; j < 8; j++) {
//! @todo don't like this =/ //maybe &inode->inode_table[j*PFS_ONE_PAGE].ipage or something
addr = ((u8*) inode->inode_page + j * 32);
if (flag == PFS_WRITE) {
ret = __osContRamWrite(pfs->queue, pfs->channel, pfs->inode_table + bank * 8 + j, addr, false);
ret = __osContRamWrite(pfs->queue, pfs->channel, pfs->minode_table + bank * 8 + j, addr, false);
} else {
ret = __osContRamRead(pfs->queue, pfs->channel, pfs->inode_table + bank * 8 + j, addr);
}
if (ret != 0) {
return ret;
}
}
if (flag == PFS_READ) {
sum = __osSumcalc((u8*) &inode->inode_page[offset], (-offset) * 2 + 256);
if (sum != inode->inode_page[0].inode_t.page) {
for (j = 0; j < PFS_ONE_PAGE; j++) {
addr = ((u8*) inode->inode_page + j * 32);
ret = __osContRamRead(pfs->queue, pfs->channel, pfs->minode_table + bank * PFS_ONE_PAGE + j, addr);
}
if (sum != inode->inode_page[0].inode_t.page) {
return PFS_ERR_INCONSISTENT;
}
for (j = 0; j < PFS_ONE_PAGE; j++) {
addr = ((u8*) inode->inode_page + j * 32);
ret =
__osContRamWrite(pfs->queue, pfs->channel, pfs->inode_table + bank * PFS_ONE_PAGE + j, addr, false);
}
} else {
for (j = 0; j < PFS_ONE_PAGE; j++) {
addr = ((u8*) inode->inode_page + j * 32);
ret = __osContRamWrite(pfs->queue, pfs->channel, pfs->minode_table + bank * PFS_ONE_PAGE + j, addr,
false);
}
}
}
return 0;
}
s32 __osPfsSelectBank(OSPfs* pfs) {
u8 temp[BLOCKSIZE];
int i;
s32 ret;
ret = 0;
for (i = 0; i < ARRLEN(temp); i++) {
temp[i] = pfs->activebank;
}
ret = __osContRamWrite(pfs->queue, pfs->channel, 1024, (u8*) temp, false);
return ret;
}
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