X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Feeprom.cpp;h=bba94afd3d4cb5f283b79cc30a08aaa53d04a5c0;hb=5c28b6dbf7aa20441c8a51f484f4f64b1966f7e3;hp=4a55ee0beddef95070a06173e1b0235fda6ca1bc;hpb=fa566a2c8ec532eb5325b4d5a663fb2a7d72adc6;p=virtualjaguar diff --git a/src/eeprom.cpp b/src/eeprom.cpp index 4a55ee0..bba94af 100644 --- a/src/eeprom.cpp +++ b/src/eeprom.cpp @@ -1,13 +1,26 @@ // -// EEPROM handler +// Jaguar EEPROM handler // -// by cal2 +// by Cal2 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS) -// Cleanups by James L. Hammons +// 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]; @@ -16,131 +29,119 @@ static uint16 eeprom_ram[64]; // Private function prototypes // -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[1024]; - - -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[1024]; + sprintf(eeprom_filename, "%s%08X.eep", vjs.EEPROMPath, (unsigned int)jaguarMainROMCRC32); + FILE * fp = fopen(eeprom_filename, "rb"); - sprintf(eeprom_filename, "%s\\%s%08X.eep", jaguar_boot_dir, jaguar_eeproms_path, (unsigned int)jaguar_mainRom_crc32); - jerry_ee_fp = fopen(eeprom_filename, "rb"); - if (jerry_ee_fp) + 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) + if (!foundEEPROM) memset(eeprom_ram, 0xFF, 64 * sizeof(uint16)); } -void eeprom_done(void) +void EepromDone(void) { - if (jerry_ee_fp) + WriteLog("EEPROM: Done.\n"); +} + +static void EEPROMSave(void) +{ + 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; + return eeprom_get_do(); 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; +// 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: + eeprom_set_di(data & 0x01); break; case 0xF15001: eeprom_set_cs(1); break; -// default: fprintf(log_get(),"eeprom: unmapped 0x%.8x\n",offset); break; +// default: WriteLog("eeprom: unmapped 0x%.8x\n",offset); break; } - - return 0x00; } -uint16 eeprom_word_read(uint32 offset) +void EepromWriteWord(uint32 offset, uint16 data) { - return ((uint16)eeprom_byte_read(offset+0) << 8) | eeprom_byte_read(offset+1); + 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: @@ -153,7 +154,7 @@ void eeprom_set_di(uint32 data) case EE_STATE_OP_B: jerry_ee_op |= data; jerry_ee_direct_jump = 0; -// fprintf(log_get(),"eeprom: opcode %i\n",jerry_ee_op); +// WriteLog("eeprom: opcode %i\n",jerry_ee_op); switch (jerry_ee_op) { case 0: jerry_ee_state = EE_STATE_0; break; @@ -182,7 +183,7 @@ void eeprom_set_di(uint32 data) break; case EE_STATE_0_0_0: // writes disable - // fprintf(log_get(),"eeprom: read only\n"); + // WriteLog("eeprom: read only\n"); jerry_writes_enabled = 0; jerry_ee_state = EE_STATE_START; break; @@ -195,26 +196,28 @@ void eeprom_set_di(uint32 data) jerry_ee_direct_jump = 1; break; case EE_STATE_0_0_1_0: - // fprintf(log_get(),"eeprom: filling eeprom with 0x%.4x\n",data); + // 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; - //else - // fprintf(log_get(),"eeprom: not writing because read only\n"); + + 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 - //fprintf(log_get(),"eeprom: erasing eeprom\n"); + //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; + jerry_ee_state = EE_STATE_BUSY; break; case EE_STATE_0_0_3: // writes enable - //fprintf(log_get(),"eeprom: read/write\n"); + //WriteLog("eeprom: read/write\n"); jerry_writes_enabled = 1; jerry_ee_state = EE_STATE_START; break; @@ -233,9 +236,11 @@ void eeprom_set_di(uint32 data) 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); + //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: @@ -254,44 +259,49 @@ void eeprom_set_di(uint32 data) jerry_ee_direct_jump = 1; break; case EE_STATE_3_0: - //fprintf(log_get(),"eeprom: erasing 0x%.2x\n",jerry_ee_address_data); + //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: - //fprintf(log_get(),"eeprom:\t\t\t%i bit %i\n",data,jerry_ee_data_cnt-1); + 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: + 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); +// WriteLog("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); + //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; + 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); +// WriteLog("eeprom: cs=%i\n",state); jerry_ee_state = EE_STATE_START; jerry_ee_op = 0; jerry_ee_rstate = 0; @@ -302,7 +312,7 @@ void eeprom_set_cs(uint32 state) jerry_writes_enabled = 1; } -uint32 eeprom_get_do(void) +static uint32 eeprom_get_do(void) { uint16 data = 1; @@ -318,14 +328,15 @@ uint32 eeprom_get_do(void) 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) { - //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()); + //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); +// WriteLog("eeprom: do=%i\n",data); return data; }