X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Feeprom.cpp;h=bba94afd3d4cb5f283b79cc30a08aaa53d04a5c0;hb=5c28b6dbf7aa20441c8a51f484f4f64b1966f7e3;hp=1610e1cc2643b302564c3e588d514477438ed20e;hpb=86bd0f2592c3cd674239532247276bd2d579a857;p=virtualjaguar diff --git a/src/eeprom.cpp b/src/eeprom.cpp index 1610e1c..bba94af 100644 --- a/src/eeprom.cpp +++ b/src/eeprom.cpp @@ -1,428 +1,342 @@ +// +// Jaguar EEPROM handler +// +// by Cal2 +// GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS) +// Cleanups/enhancements by James Hammons +// (C) 2010 Underground Software +// +// JLH = James Hammons +// +// Who When What +// --- ---------- ------------------------------------------------------------- +// JLH 01/16/2010 Created this log ;-) +// + #include "eeprom.h" +#include +#include // For memset +#include "jaguar.h" +#include "log.h" +#include "settings.h" + #define eeprom_LOG static uint16 eeprom_ram[64]; -void eeprom_set_di(uint32 state); -void eeprom_set_cs(uint32 state); -uint32 eeprom_get_do(void); - -#define EE_STATE_START 1 -#define EE_STATE_OP_A 2 -#define EE_STATE_OP_B 3 -#define EE_STATE_0 4 -#define EE_STATE_1 5 -#define EE_STATE_2 6 -#define EE_STATE_3 7 -#define EE_STATE_0_0 8 -#define EE_READ_ADDRESS 9 -#define EE_STATE_0_0_0 10 -#define EE_STATE_0_0_1 11 -#define EE_STATE_0_0_2 12 -#define EE_STATE_0_0_3 13 -#define EE_STATE_0_0_1_0 14 -#define EE_READ_DATA 15 -#define EE_STATE_BUSY 16 -#define EE_STATE_1_0 17 -#define EE_STATE_1_1 18 -#define EE_STATE_2_0 19 -#define EE_STATE_3_0 20 - -uint16 jerry_ee_state = EE_STATE_START; -uint16 jerry_ee_op = 0; -uint16 jerry_ee_rstate = 0; -uint16 jerry_ee_address_data = 0; -uint16 jerry_ee_address_cnt = 6; -uint16 jerry_ee_data = 0; -uint16 jerry_ee_data_cnt = 16; -uint16 jerry_writes_enabled = 0; -uint16 jerry_ee_direct_jump = 0; -FILE * jerry_ee_fp; -extern char * jaguar_boot_dir; - -////////////////////////////////////////////////////////////////////////////// // -////////////////////////////////////////////////////////////////////////////// +// Private function prototypes // -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -void eeprom_init(void) + +static void EEPROMSave(void); +static void eeprom_set_di(uint32 state); +static void eeprom_set_cs(uint32 state); +static uint32 eeprom_get_do(void); + +enum { EE_STATE_START = 1, EE_STATE_OP_A, EE_STATE_OP_B, EE_STATE_0, EE_STATE_1, + EE_STATE_2, EE_STATE_3, EE_STATE_0_0, EE_READ_ADDRESS, EE_STATE_0_0_0, + EE_STATE_0_0_1, EE_STATE_0_0_2, EE_STATE_0_0_3, EE_STATE_0_0_1_0, EE_READ_DATA, + EE_STATE_BUSY, EE_STATE_1_0, EE_STATE_1_1, EE_STATE_2_0, EE_STATE_3_0 }; + +// Local global variables + +static uint16 jerry_ee_state = EE_STATE_START; +static uint16 jerry_ee_op = 0; +static uint16 jerry_ee_rstate = 0; +static uint16 jerry_ee_address_data = 0; +static uint16 jerry_ee_address_cnt = 6; +static uint16 jerry_ee_data = 0; +static uint16 jerry_ee_data_cnt = 16; +static uint16 jerry_writes_enabled = 0; +static uint16 jerry_ee_direct_jump = 0; +static char eeprom_filename[MAX_PATH]; +static bool foundEEPROM = false; + +void EepromInit(void) { - static char eeprom_filename[256]; - sprintf(eeprom_filename,"%s\\%s%.8x.eep",jaguar_boot_dir,jaguar_eeproms_path,jaguar_mainRom_crc32); - jerry_ee_fp=fopen(eeprom_filename,"rb"); - if (jerry_ee_fp) + sprintf(eeprom_filename, "%s%08X.eep", vjs.EEPROMPath, (unsigned int)jaguarMainROMCRC32); + FILE * fp = fopen(eeprom_filename, "rb"); + + if (fp) { - fread(eeprom_ram,1,128,jerry_ee_fp); - fclose(jerry_ee_fp); - fprintf(log_get(),"eeprom: loaded from %s\n",eeprom_filename); - jerry_ee_fp=fopen(eeprom_filename,"wrb"); + fread(eeprom_ram, 1, 128, fp); + fclose(fp); + WriteLog("EEPROM: Loaded from %s\n", eeprom_filename); + foundEEPROM = true; } else - { - fprintf(log_get(),"eeprom: creating %s\n",eeprom_filename); - jerry_ee_fp=fopen(eeprom_filename,"wb"); - if (jerry_ee_fp==NULL) - fprintf(log_get(),"eeprom: could not open/create %s\n",eeprom_filename); - } + WriteLog("EEPROM: Could not open file \"%s\"!\n", eeprom_filename); } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -void eeprom_reset(void) + +void EepromReset(void) { - if (jerry_ee_fp==NULL) - memset(eeprom_ram,0xff,64*2); + if (!foundEEPROM) + memset(eeprom_ram, 0xFF, 64 * sizeof(uint16)); } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -void eeprom_done(void) + +void EepromDone(void) +{ + WriteLog("EEPROM: Done.\n"); +} + +static void EEPROMSave(void) { - if (jerry_ee_fp) + FILE * fp = fopen(eeprom_filename, "wb"); + + if (fp == NULL) { - fwrite(eeprom_ram,1,128,jerry_ee_fp); - fclose(jerry_ee_fp); + WriteLog("EEPROM: Could not create file \"%s!\"\n", eeprom_filename); + return; } - else - fprintf(log_get(),"eeprom: not saved\n"); + + fwrite(eeprom_ram, 1, 128, fp); + fclose(fp); } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -void eeprom_byte_write(uint32 offset, uint8 data) + +uint8 EepromReadByte(uint32 offset) { switch (offset) { - case 0xf14001: break; - case 0xf14801: eeprom_set_di(data&0x01); break; - case 0xf15001: eeprom_set_cs(1); break; -// default: fprintf(log_get(),"eeprom: unmapped 0x%.8x\n",offset); break; + case 0xF14001: + return eeprom_get_do(); + case 0xF14801: + break; + case 0xF15001: + eeprom_set_cs(1); + break; +// default: WriteLog("EEPROM: unmapped 0x%.8x\n", offset); break; } + + return 0x00; } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -void eeprom_word_write(uint32 offset, uint16 data) + +uint16 EepromReadWord(uint32 offset) { - eeprom_byte_write(offset+0,(data>>8)&0xff); - eeprom_byte_write(offset+1,(data&0xff)); + return ((uint16)EepromReadByte(offset + 0) << 8) | EepromReadByte(offset + 1); } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -uint8 eeprom_byte_read(uint32 offset) + +void EepromWriteByte(uint32 offset, uint8 data) { switch (offset) { - case 0xf14001: return(eeprom_get_do()); break; - case 0xf14801: break; - case 0xf15001: eeprom_set_cs(1); break; -// default: fprintf(log_get(),"eeprom: unmapped 0x%.8x\n",offset); break; + case 0xF14001: + break; + case 0xF14801: + eeprom_set_di(data & 0x01); + break; + case 0xF15001: + eeprom_set_cs(1); + break; +// default: WriteLog("eeprom: unmapped 0x%.8x\n",offset); break; } - return(0x00); } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -uint16 eeprom_word_read(uint32 offset) + +void EepromWriteWord(uint32 offset, uint16 data) { - uint16 data=eeprom_byte_read(offset+0); - data<<=8; - data|=eeprom_byte_read(offset+1); - return(data); + EepromWriteByte(offset + 0, (data >> 8) & 0xFF); + EepromWriteByte(offset + 1, data & 0xFF); } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -void eeprom_set_di(uint32 data) + +static void eeprom_set_di(uint32 data) { -// fprintf(log_get(),"eeprom: di=%i\n",data); -// fprintf(log_get(),"eeprom: state %i\n",jerry_ee_state); +// WriteLog("eeprom: di=%i\n",data); +// WriteLog("eeprom: state %i\n",jerry_ee_state); switch (jerry_ee_state) { - case EE_STATE_START: { - jerry_ee_state=EE_STATE_OP_A; - break; - } - case EE_STATE_OP_A: { - jerry_ee_op=(data<<1); - jerry_ee_state=EE_STATE_OP_B; - break; - } - case EE_STATE_OP_B: { - jerry_ee_op|=data; - jerry_ee_direct_jump=0; -// fprintf(log_get(),"eeprom: opcode %i\n",jerry_ee_op); - switch (jerry_ee_op) - { - case 0: jerry_ee_state=EE_STATE_0; break; - case 1: jerry_ee_state=EE_STATE_1; break; - case 2: jerry_ee_state=EE_STATE_2; break; - case 3: jerry_ee_state=EE_STATE_3; break; - } - eeprom_set_di(data); - break; - } - case EE_STATE_0: { - jerry_ee_rstate=EE_STATE_0_0; - jerry_ee_state=EE_READ_ADDRESS; - jerry_ee_direct_jump=1; - jerry_ee_address_cnt=6; - jerry_ee_address_data=0; - break; - } - case EE_STATE_0_0: { - switch ((jerry_ee_address_data>>4)&0x03) - { - case 0: jerry_ee_state=EE_STATE_0_0_0; break; - case 1: jerry_ee_state=EE_STATE_0_0_1; break; - case 2: jerry_ee_state=EE_STATE_0_0_2; break; - case 3: jerry_ee_state=EE_STATE_0_0_3; break; - } - eeprom_set_di(data); - break; - } - case EE_STATE_0_0_0:{ - // writes disable - // fprintf(log_get(),"eeprom: read only\n"); - jerry_writes_enabled=0; - jerry_ee_state=EE_STATE_START; - break; - } - case EE_STATE_0_0_1:{ - // writes all - jerry_ee_rstate=EE_STATE_0_0_1_0; - jerry_ee_state=EE_READ_DATA; - jerry_ee_data_cnt=16; - jerry_ee_data=0; - jerry_ee_direct_jump=1; - break; - } - case EE_STATE_0_0_1_0:{ - // fprintf(log_get(),"eeprom: filling eeprom with 0x%.4x\n",data); - if (jerry_writes_enabled) - { - for (int i=0;i<64;i++) - eeprom_ram[i]=jerry_ee_data; - } - //else - // fprintf(log_get(),"eeprom: not writing because read only\n"); - jerry_ee_state=EE_STATE_BUSY; - break; - } - case EE_STATE_0_0_2:{ - // erase all - //fprintf(log_get(),"eeprom: erasing eeprom\n"); - if (jerry_writes_enabled) - { - for (int i=0;i<64;i++) - eeprom_ram[i]=0xffff; - } - jerry_ee_state=EE_STATE_BUSY; - break; - } - case EE_STATE_0_0_3:{ - // writes enable - //fprintf(log_get(),"eeprom: read/write\n"); - jerry_writes_enabled=1; - jerry_ee_state=EE_STATE_START; - break; - } - case EE_STATE_1: { - jerry_ee_rstate=EE_STATE_1_0; - jerry_ee_state=EE_READ_ADDRESS; - jerry_ee_address_cnt=6; - jerry_ee_address_data=0; - jerry_ee_direct_jump=1; - break; - } - case EE_STATE_1_0: { - jerry_ee_rstate=EE_STATE_1_1; - jerry_ee_state=EE_READ_DATA; - jerry_ee_data_cnt=16; - jerry_ee_data=0; - jerry_ee_direct_jump=1; - break; - } - case EE_STATE_1_1: { - //fprintf(log_get(),"eeprom: writing 0x%.4x at 0x%.2x\n",jerry_ee_data,jerry_ee_address_data); - if (jerry_writes_enabled) - eeprom_ram[jerry_ee_address_data]=jerry_ee_data; - jerry_ee_state=EE_STATE_BUSY; - break; - } - case EE_STATE_2: { - jerry_ee_rstate=EE_STATE_2_0; - jerry_ee_state=EE_READ_ADDRESS; - jerry_ee_address_cnt=6; - jerry_ee_address_data=0; - jerry_ee_data_cnt=16; - jerry_ee_data=0; - break; - } - case EE_STATE_3: { - jerry_ee_rstate=EE_STATE_3_0; - jerry_ee_state=EE_READ_ADDRESS; - jerry_ee_address_cnt=6; - jerry_ee_address_data=0; - jerry_ee_direct_jump=1; - break; - } - case EE_STATE_3_0: { - //fprintf(log_get(),"eeprom: erasing 0x%.2x\n",jerry_ee_address_data); - if (jerry_writes_enabled) - eeprom_ram[jerry_ee_address_data]=0xffff; - jerry_ee_state=EE_STATE_BUSY; - break; - } - case EE_READ_DATA: - { - //fprintf(log_get(),"eeprom:\t\t\t%i bit %i\n",data,jerry_ee_data_cnt-1); - jerry_ee_data<<=1; - jerry_ee_data|=data; - jerry_ee_data_cnt--; - if (!jerry_ee_data_cnt) - { - jerry_ee_state=jerry_ee_rstate; - if (jerry_ee_direct_jump) - eeprom_set_di(data); - } - break; - } - case EE_READ_ADDRESS: - { - jerry_ee_address_data<<=1; - jerry_ee_address_data|=data; - jerry_ee_address_cnt--; -// fprintf(log_get(),"eeprom:\t%i bits remaining\n",jerry_ee_address_cnt); - if (!jerry_ee_address_cnt) - { - jerry_ee_state=jerry_ee_rstate; - //fprintf(log_get(),"eeprom:\t\tread address 0x%.2x\n",jerry_ee_address_data); - if (jerry_ee_direct_jump) - eeprom_set_di(data); - } - break; - } - default: { - jerry_ee_state=EE_STATE_OP_A; - break; - } - + case EE_STATE_START: + jerry_ee_state = EE_STATE_OP_A; + break; + case EE_STATE_OP_A: + jerry_ee_op = (data << 1); + jerry_ee_state = EE_STATE_OP_B; + break; + case EE_STATE_OP_B: + jerry_ee_op |= data; + jerry_ee_direct_jump = 0; +// WriteLog("eeprom: opcode %i\n",jerry_ee_op); + switch (jerry_ee_op) + { + case 0: jerry_ee_state = EE_STATE_0; break; + case 1: jerry_ee_state = EE_STATE_1; break; + case 2: jerry_ee_state = EE_STATE_2; break; + case 3: jerry_ee_state = EE_STATE_3; break; + } + eeprom_set_di(data); + break; + case EE_STATE_0: + jerry_ee_rstate = EE_STATE_0_0; + jerry_ee_state = EE_READ_ADDRESS; + jerry_ee_direct_jump = 1; + jerry_ee_address_cnt = 6; + jerry_ee_address_data = 0; + break; + case EE_STATE_0_0: + switch ((jerry_ee_address_data >> 4) & 0x03) + { + case 0: jerry_ee_state=EE_STATE_0_0_0; break; + case 1: jerry_ee_state=EE_STATE_0_0_1; break; + case 2: jerry_ee_state=EE_STATE_0_0_2; break; + case 3: jerry_ee_state=EE_STATE_0_0_3; break; + } + eeprom_set_di(data); + break; + case EE_STATE_0_0_0: + // writes disable + // WriteLog("eeprom: read only\n"); + jerry_writes_enabled = 0; + jerry_ee_state = EE_STATE_START; + break; + case EE_STATE_0_0_1: + // writes all + jerry_ee_rstate = EE_STATE_0_0_1_0; + jerry_ee_state = EE_READ_DATA; + jerry_ee_data_cnt = 16; + jerry_ee_data = 0; + jerry_ee_direct_jump = 1; + break; + case EE_STATE_0_0_1_0: + // WriteLog("eeprom: filling eeprom with 0x%.4x\n",data); + if (jerry_writes_enabled) + for(int i=0; i<64; i++) + eeprom_ram[i] = jerry_ee_data; + + EEPROMSave(); // Save it NOW! + //else + // WriteLog("eeprom: not writing because read only\n"); + jerry_ee_state = EE_STATE_BUSY; + break; + case EE_STATE_0_0_2: + // erase all + //WriteLog("eeprom: erasing eeprom\n"); + if (jerry_writes_enabled) + for(int i=0; i<64; i++) + eeprom_ram[i] = 0xFFFF; + + jerry_ee_state = EE_STATE_BUSY; + break; + case EE_STATE_0_0_3: + // writes enable + //WriteLog("eeprom: read/write\n"); + jerry_writes_enabled = 1; + jerry_ee_state = EE_STATE_START; + break; + case EE_STATE_1: + jerry_ee_rstate = EE_STATE_1_0; + jerry_ee_state = EE_READ_ADDRESS; + jerry_ee_address_cnt = 6; + jerry_ee_address_data = 0; + jerry_ee_direct_jump = 1; + break; + case EE_STATE_1_0: + jerry_ee_rstate = EE_STATE_1_1; + jerry_ee_state = EE_READ_DATA; + jerry_ee_data_cnt = 16; + jerry_ee_data = 0; + jerry_ee_direct_jump = 1; + break; + case EE_STATE_1_1: + //WriteLog("eeprom: writing 0x%.4x at 0x%.2x\n",jerry_ee_data,jerry_ee_address_data); + if (jerry_writes_enabled) + eeprom_ram[jerry_ee_address_data] = jerry_ee_data; + + EEPROMSave(); // Save it NOW! + jerry_ee_state = EE_STATE_BUSY; + break; + case EE_STATE_2: + jerry_ee_rstate = EE_STATE_2_0; + jerry_ee_state = EE_READ_ADDRESS; + jerry_ee_address_cnt = 6; + jerry_ee_address_data = 0; + jerry_ee_data_cnt = 16; + jerry_ee_data = 0; + break; + case EE_STATE_3: + jerry_ee_rstate = EE_STATE_3_0; + jerry_ee_state = EE_READ_ADDRESS; + jerry_ee_address_cnt = 6; + jerry_ee_address_data = 0; + jerry_ee_direct_jump = 1; + break; + case EE_STATE_3_0: + //WriteLog("eeprom: erasing 0x%.2x\n",jerry_ee_address_data); + if (jerry_writes_enabled) + eeprom_ram[jerry_ee_address_data] = 0xFFFF; + + jerry_ee_state = EE_STATE_BUSY; + break; + case EE_READ_DATA: + //WriteLog("eeprom:\t\t\t%i bit %i\n",data,jerry_ee_data_cnt-1); + jerry_ee_data <<= 1; + jerry_ee_data |= data; + jerry_ee_data_cnt--; + + if (!jerry_ee_data_cnt) + { + jerry_ee_state = jerry_ee_rstate; + + if (jerry_ee_direct_jump) + eeprom_set_di(data); + } + break; + case EE_READ_ADDRESS: + jerry_ee_address_data <<= 1; + jerry_ee_address_data |= data; + jerry_ee_address_cnt--; +// WriteLog("eeprom:\t%i bits remaining\n",jerry_ee_address_cnt); + + if (!jerry_ee_address_cnt) + { + jerry_ee_state = jerry_ee_rstate; + //WriteLog("eeprom:\t\tread address 0x%.2x\n",jerry_ee_address_data); + + if (jerry_ee_direct_jump) + eeprom_set_di(data); + } + break; + default: + jerry_ee_state = EE_STATE_OP_A; } } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -void eeprom_set_cs(uint32 state) + +static void eeprom_set_cs(uint32 state) { -// fprintf(log_get(),"eeprom: cs=%i\n",state); - jerry_ee_state=EE_STATE_START; - jerry_ee_op=0; - jerry_ee_rstate=0; - jerry_ee_address_data=0; - jerry_ee_address_cnt=6; - jerry_ee_data=0; - jerry_ee_data_cnt=16; - jerry_writes_enabled=1; +// WriteLog("eeprom: cs=%i\n",state); + jerry_ee_state = EE_STATE_START; + jerry_ee_op = 0; + jerry_ee_rstate = 0; + jerry_ee_address_data = 0; + jerry_ee_address_cnt = 6; + jerry_ee_data = 0; + jerry_ee_data_cnt = 16; + jerry_writes_enabled = 1; } -////////////////////////////////////////////////////////////////////////////// -// -////////////////////////////////////////////////////////////////////////////// -// -// -// -// -// -// -////////////////////////////////////////////////////////////////////////////// -uint32 eeprom_get_do(void) + +static uint32 eeprom_get_do(void) { - uint16 data=1; + uint16 data = 1; + switch (jerry_ee_state) { - case EE_STATE_START: { - data=1; - break; - } - case EE_STATE_BUSY: { - jerry_ee_state=EE_STATE_START; - data=0; - break; - } - case EE_STATE_2_0: { - jerry_ee_data_cnt--; - data=((eeprom_ram[jerry_ee_address_data]&(1<>jerry_ee_data_cnt); - if (!jerry_ee_data_cnt) - { - //fprintf(log_get(),"eeprom: read 0x%.4x at 0x%.2x cpu %i pc=0x%.8x\n",eeprom_ram[jerry_ee_address_data],jerry_ee_address_data,jaguar_cpu_in_exec,s68000readPC()); - jerry_ee_state=EE_STATE_START; - } - break; - } + case EE_STATE_START: + data = 1; + break; + case EE_STATE_BUSY: + jerry_ee_state = EE_STATE_START; + data = 0; + break; + case EE_STATE_2_0: + jerry_ee_data_cnt--; + data = (eeprom_ram[jerry_ee_address_data] & (1 << jerry_ee_data_cnt)) >> jerry_ee_data_cnt; + + if (!jerry_ee_data_cnt) + { + //WriteLog("eeprom: read 0x%.4x at 0x%.2x cpu %i pc=0x%.8x\n",eeprom_ram[jerry_ee_address_data],jerry_ee_address_data,jaguar_cpu_in_exec,s68000readPC()); + jerry_ee_state = EE_STATE_START; + } + break; } -// fprintf(log_get(),"eeprom: do=%i\n",data); - return(data); + +// WriteLog("eeprom: do=%i\n",data); + return data; }