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Significantly cleaned up the code for osEeepromRead

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This commit is contained in:
Ryan Myers
2021-09-22 09:37:37 -04:00
parent ef09ae3d21
commit b3cb942046
1 changed files with 33 additions and 41 deletions
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lib/src/os/osEepromRead.c
+33 -41
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@@ -8,72 +8,64 @@
#include "controller.h"
#include "siint.h"
typedef struct {
u16 unk00;
u8 unk02;
u8 unk03;
} unkStruct;
typedef struct {
u8 unk00;
u8 unk01;
u8 unk02;
u8 unk03;
u8 unk04;
u8 unk05;
u8 unk06;
u8 unk07;
} unkStruct3;
typedef struct {
u8 unk00;
u8 unk01;
u8 unk02;
u8 unk03;
unkStruct3 unk04;
} unkStruct2;
extern u8 __osContLastCmd;
extern OSPifRam __osEepPifRam;
s32 osEepromRead(OSMesgQueue *mq, u8 address, u8 *buffer) {
s32 ret;
s32 i;
u8 *sp2c;
unkStruct sp28;
unkStruct2 sp20;
u8 *ptr;
OSContStatus sdata;
__OSContEepromFormat eepromformat;
ret = 0;
i = 0;
sp2c = (u8 *) &__osEepPifRam.ramarray;
ptr = (u8 *)&__osEepPifRam.ramarray;
if (address > 0x40) {
return -1;
}
__osSiGetAccess();
ret = __osEepStatus(mq, &sp28);
if (ret != 0 || sp28.unk00 != 0x8000) {
return 8;
__osSiGetAccess();
ret = __osEepStatus(mq, &sdata);
if (ret != 0 || sdata.type != CONT_EEPROM) {
return CONT_NO_RESPONSE_ERROR;
}
while (sp28.unk02 & 0x80) {
__osEepStatus(mq, &sp28);
while (sdata.status & CONT_EEPROM_BUSY) {
__osEepStatus(mq, &sdata);
}
__osPackEepReadData(address);
ret = __osSiRawStartDma(OS_WRITE, &__osEepPifRam.ramarray);
osRecvMesg(mq, NULL, OS_MESG_BLOCK);
for (i = 0; i < 0x10; i++) {
__osEepPifRam.ramarray[i] = 255;
for (i = 0; i <= ARRLEN(__osEepPifRam.ramarray); i++) {
__osEepPifRam.ramarray[i] = CONT_CMD_NOP;
}
__osEepPifRam.pifstatus = 0;
ret = __osSiRawStartDma(OS_READ, __osEepPifRam.ramarray);
__osContLastCmd = 4;
__osContLastCmd = CONT_CMD_READ_EEPROM;
osRecvMesg(mq, NULL, OS_MESG_BLOCK);
//skip the first 4 bytes
for (i = 0; i < 4; i++) {
sp2c++;
ptr++;
}
sp20 = *(unkStruct2 *) sp2c;
ret = (sp20.unk01 & 0xc0) >> 4;
eepromformat = *(__OSContEepromFormat *) ptr;
ret = CHNL_ERR(eepromformat);
if (ret == 0) {
for (i = 0; i < 8; i++) {
*buffer++ = ((u8 *) &sp20.unk04)[i];
for (i = 0; i < ARRLEN(eepromformat.data); i++) {
*buffer++ = eepromformat.data[i];
}
}
__osSiRelAccess();
return ret;
}