/* * file_slot.c * * FAT and Memory Card SRAM/State slots managment * * Copyright Eke-Eke (2008-2014), based on original code from Softdev (2006) * * Redistribution and use of this code or any derivative works are permitted * provided that the following conditions are met: * * - Redistributions may not be sold, nor may they be used in a commercial * product or activity. * * - Redistributions that are modified from the original source must include the * complete source code, including the source code for all components used by a * binary built from the modified sources. However, as a special exception, the * source code distributed need not include anything that is normally distributed * (in either source or binary form) with the major components (compiler, kernel, * and so on) of the operating system on which the executable runs, unless that * component itself accompanies the executable. * * - Redistributions must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************************/ #include "shared.h" #include "file_slot.h" #include "file_load.h" #include "gui.h" #include "filesel.h" #include "saveicon.h" /** * libOGC CARD System Work Area */ static u8 SysArea[CARD_WORKAREA] ATTRIBUTE_ALIGN (32); /* Mega CD backup RAM stuff */ static u32 brm_crc[2]; static char brm_filename[3][32] = {CD_BRAM_JP, CD_BRAM_EU, CD_BRAM_US}; static u8 brm_format[0x40] = { 0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x00,0x00,0x00,0x00,0x40, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x53,0x45,0x47,0x41,0x5f,0x43,0x44,0x5f,0x52,0x4f,0x4d,0x00,0x01,0x00,0x00,0x00, 0x52,0x41,0x4d,0x5f,0x43,0x41,0x52,0x54,0x52,0x49,0x44,0x47,0x45,0x5f,0x5f,0x5f }; /**************************************************************************** * CardMount * * libOGC provides the CARD_Mount function, and it should be all you need. * However, experience with previous emulators has taught me that you are * better off doing a little bit more than that! * *****************************************************************************/ static int CardMount(int slot) { int tries = 0; #ifdef HW_RVL *(unsigned long *) (0xCD006800) |= 1 << 13; /*** Disable Encryption ***/ #else *(unsigned long *) (0xCC006800) |= 1 << 13; /*** Disable Encryption ***/ #endif while (tries < 10) { VIDEO_WaitVSync (); if (CARD_Mount(slot, SysArea, NULL) == CARD_ERROR_READY) return 1; else EXI_ProbeReset (); tries++; } return 0; } /**************************************************************************** * Slot Management * * ****************************************************************************/ void slot_autoload(int slot, int device) { /* Mega CD backup RAM specific */ if (!slot && (system_hw == SYSTEM_MCD)) { /* automatically load internal backup RAM */ FILE *fp = fopen(brm_filename[((region_code ^ 0x40) >> 6) - 1], "rb"); if (fp != NULL) { fread(scd.bram, 0x2000, 1, fp); fclose(fp); /* update CRC */ brm_crc[0] = crc32(0, scd.bram, 0x2000); } else { /* force internal backup RAM format (does not use previous region backup RAM) */ scd.bram[0x1fff] = 0; } /* check if internal backup RAM is correctly formatted */ if (memcmp(scd.bram + 0x2000 - 0x20, brm_format + 0x20, 0x20)) { /* clear internal backup RAM */ memset(scd.bram, 0x00, 0x2000 - 0x40); /* internal Backup RAM size fields */ brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = 0x00; brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (sizeof(scd.bram) / 64) - 3; /* format internal backup RAM */ memcpy(scd.bram + 0x2000 - 0x40, brm_format, 0x40); /* clear CRC to force file saving (in case previous region backup RAM was also formatted) */ brm_crc[0] = 0; } /* automatically load cartridge backup RAM (if enabled) */ if (scd.cartridge.id) { fp = fopen(CART_BRAM, "rb"); if (fp != NULL) { int filesize = scd.cartridge.mask + 1; int done = 0; /* Read into buffer (2k blocks) */ while (filesize > CHUNKSIZE) { fread(scd.cartridge.area + done, CHUNKSIZE, 1, fp); done += CHUNKSIZE; filesize -= CHUNKSIZE; } /* Read remaining bytes */ if (filesize) { fread(scd.cartridge.area + done, filesize, 1, fp); } /* close file */ fclose(fp); /* update CRC */ brm_crc[1] = crc32(0, scd.cartridge.area, scd.cartridge.mask + 1); } /* check if cartridge backup RAM is correctly formatted */ if (memcmp(scd.cartridge.area + scd.cartridge.mask + 1 - 0x20, brm_format + 0x20, 0x20)) { /* clear cartridge backup RAM */ memset(scd.cartridge.area, 0x00, scd.cartridge.mask + 1); /* Cartridge Backup RAM size fields */ brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = (((scd.cartridge.mask + 1) / 64) - 3) >> 8; brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (((scd.cartridge.mask + 1) / 64) - 3) & 0xff; /* format cartridge backup RAM */ memcpy(scd.cartridge.area + scd.cartridge.mask + 1 - 0x40, brm_format, 0x40); } } } /* configurable SRAM & State auto-saving */ if ((slot && !(config.s_auto & 2)) || (!slot && !(config.s_auto & 1))) { return; } if (strlen(rom_filename)) { SILENT = 1; slot_load(slot, device); SILENT = 0; } } void slot_autosave(int slot, int device) { /* Mega CD backup RAM specific */ if (!slot && (system_hw == SYSTEM_MCD)) { /* verify that internal backup RAM has been modified */ if (crc32(0, scd.bram, 0x2000) != brm_crc[0]) { /* check if it is correctly formatted before saving */ if (!memcmp(scd.bram + 0x2000 - 0x20, brm_format + 0x20, 0x20)) { FILE *fp = fopen(brm_filename[((region_code ^ 0x40) >> 6) - 1], "wb"); if (fp != NULL) { fwrite(scd.bram, 0x2000, 1, fp); fclose(fp); /* update CRC */ brm_crc[0] = crc32(0, scd.bram, 0x2000); } } } /* verify that cartridge backup RAM has been modified */ if (scd.cartridge.id && (crc32(0, scd.cartridge.area, scd.cartridge.mask + 1) != brm_crc[1])) { /* check if it is correctly formatted before saving */ if (!memcmp(scd.cartridge.area + scd.cartridge.mask + 1 - 0x20, brm_format + 0x20, 0x20)) { FILE *fp = fopen(CART_BRAM, "wb"); if (fp != NULL) { int filesize = scd.cartridge.mask + 1; int done = 0; /* Write to file (2k blocks) */ while (filesize > CHUNKSIZE) { fwrite(scd.cartridge.area + done, CHUNKSIZE, 1, fp); done += CHUNKSIZE; filesize -= CHUNKSIZE; } /* Write remaining bytes */ if (filesize) { fwrite(scd.cartridge.area + done, filesize, 1, fp); } /* Close file */ fclose(fp); /* update CRC */ brm_crc[1] = crc32(0, scd.cartridge.area, scd.cartridge.mask + 1); } } } } /* configurable SRAM & State auto-saving */ if ((slot && !(config.s_auto & 2)) || (!slot && !(config.s_auto & 1))) { return; } if (strlen(rom_filename)) { SILENT = 1; slot_save(slot, device); SILENT = 0; } } void slot_autodetect(int slot, int device, t_slot *ptr) { if (!ptr) return; char filename[MAXPATHLEN]; memset(ptr,0,sizeof(t_slot)); if (!device) { /* FAT support */ if (slot > 0) { sprintf (filename,"%s/saves/%s.gp%d", DEFAULT_PATH, rom_filename, slot - 1); } else { sprintf (filename,"%s/saves/%s.srm", DEFAULT_PATH, rom_filename); } /* Open file */ FILE *fp = fopen(filename, "rb"); if (fp) { /* Retrieve date & close */ struct stat filestat; stat(filename, &filestat); struct tm *timeinfo = localtime(&filestat.st_mtime); ptr->year = 1900 + timeinfo->tm_year; ptr->month = timeinfo->tm_mon; ptr->day = timeinfo->tm_mday; ptr->hour = timeinfo->tm_hour; ptr->min = timeinfo->tm_min; fclose(fp); ptr->valid = 1; } } else { /* Memory Card support */ if (slot > 0) sprintf(filename,"MD-%04X.gp%d", rominfo.realchecksum, slot - 1); else sprintf(filename,"MD-%04X.srm", rominfo.realchecksum); /* Initialise the CARD system */ memset(&SysArea, 0, CARD_WORKAREA); CARD_Init("GENP", "00"); /* CARD slot */ device--; /* Mount CARD */ if (CardMount(device)) { /* Open file */ card_file CardFile; if (CARD_Open(device, filename, &CardFile) == CARD_ERROR_READY) { /* Retrieve date & close */ card_stat CardStatus; CARD_GetStatus(device, CardFile.filenum, &CardStatus); time_t rawtime = CardStatus.time; struct tm *timeinfo = localtime(&rawtime); ptr->year = 1900 + timeinfo->tm_year; ptr->month = timeinfo->tm_mon; ptr->day = timeinfo->tm_mday; ptr->hour = timeinfo->tm_hour; ptr->min = timeinfo->tm_min; CARD_Close(&CardFile); ptr->valid = 1; } CARD_Unmount(device); } } } int slot_delete(int slot, int device) { char filename[MAXPATHLEN]; int ret = 0; if (!device) { /* FAT support */ if (slot > 0) { /* remove screenshot */ sprintf(filename,"%s/saves/%s__%d.png", DEFAULT_PATH, rom_filename, slot - 1); remove(filename); sprintf (filename,"%s/saves/%s.gp%d", DEFAULT_PATH, rom_filename, slot - 1); } else { sprintf (filename,"%s/saves/%s.srm", DEFAULT_PATH, rom_filename); } /* Delete file */ ret = remove(filename); } else { /* Memory Card support */ if (slot > 0) sprintf(filename,"MD-%04X.gp%d", rominfo.realchecksum, slot - 1); else sprintf(filename,"MD-%04X.srm", rominfo.realchecksum); /* Initialise the CARD system */ memset(&SysArea, 0, CARD_WORKAREA); CARD_Init("GENP", "00"); /* CARD slot */ device--; /* Mount CARD */ if (CardMount(device)) { /* Delete file */ ret = CARD_Delete(device,filename); CARD_Unmount(device); } } return ret; } int slot_load(int slot, int device) { char filename[MAXPATHLEN]; unsigned long filesize, done = 0; u8 *buffer; /* File Type */ if (slot > 0) { GUI_MsgBoxOpen("Information","Loading State ...",1); } else { if (!sram.on) { GUI_WaitPrompt("Error","Backup RAM is disabled !"); return 0; } GUI_MsgBoxOpen("Information","Loading Backup RAM ...",1); } /* Device Type */ if (!device) { /* FAT file */ if (slot > 0) { sprintf (filename,"%s/saves/%s.gp%d", DEFAULT_PATH, rom_filename, slot - 1); } else { sprintf (filename,"%s/saves/%s.srm", DEFAULT_PATH, rom_filename); } /* Open file */ FILE *fp = fopen(filename, "rb"); if (!fp) { GUI_WaitPrompt("Error","Unable to open file !"); return 0; } /* Get file size */ fseek(fp, 0, SEEK_END); filesize = ftell(fp); fseek(fp, 0, SEEK_SET); /* allocate buffer */ buffer = (u8 *)memalign(32,filesize); if (!buffer) { GUI_WaitPrompt("Error","Unable to allocate memory !"); fclose(fp); return 0; } /* Read into buffer (2k blocks) */ while (filesize > CHUNKSIZE) { fread(buffer + done, CHUNKSIZE, 1, fp); done += CHUNKSIZE; filesize -= CHUNKSIZE; } /* Read remaining bytes */ fread(buffer + done, filesize, 1, fp); done += filesize; /* Close file */ fclose(fp); } else { /* Memory Card file */ if (slot > 0) { sprintf(filename, "MD-%04X.gp%d", rominfo.realchecksum, slot - 1); } else { sprintf(filename, "MD-%04X.srm", rominfo.realchecksum); } /* Initialise the CARD system */ char action[64]; memset(&SysArea, 0, CARD_WORKAREA); CARD_Init("GENP", "00"); /* CARD slot */ device--; /* Attempt to mount the card */ if (!CardMount(device)) { GUI_WaitPrompt("Error","Unable to mount memory card"); return 0; } /* Retrieve the sector size */ u32 SectorSize = 0; int CardError = CARD_GetSectorSize(device, &SectorSize); if (!SectorSize) { sprintf(action, "Invalid sector size (%d)", CardError); GUI_WaitPrompt("Error",action); CARD_Unmount(device); return 0; } /* Open file */ card_file CardFile; CardError = CARD_Open(device, filename, &CardFile); if (CardError) { sprintf(action, "Unable to open file (%d)", CardError); GUI_WaitPrompt("Error",action); CARD_Unmount(device); return 0; } /* Get file size */ filesize = CardFile.len; if (filesize % SectorSize) { filesize = ((filesize / SectorSize) + 1) * SectorSize; } /* Allocate buffer */ u8 *in = (u8 *)memalign(32, filesize); if (!in) { GUI_WaitPrompt("Error","Unable to allocate memory !"); CARD_Close(&CardFile); CARD_Unmount(device); return 0; } /* Read file sectors */ while (filesize > 0) { CARD_Read(&CardFile, &in[done], SectorSize, done); done += SectorSize; filesize -= SectorSize; } /* Close file */ CARD_Close(&CardFile); CARD_Unmount(device); /* Uncompressed file size */ memcpy(&filesize, in + 2112, 4); buffer = (u8 *)memalign(32, filesize); if (!buffer) { free(in); GUI_WaitPrompt("Error","Unable to allocate memory !"); return 0; } /* Uncompress file */ uncompress ((Bytef *)buffer, &filesize, (Bytef *)(in + 2112 + 4), done - 2112 - 4); done = filesize; free(in); } if (slot > 0) { /* Load state */ if (state_load(buffer) <= 0) { free(buffer); GUI_WaitPrompt("Error","Invalid state file !"); return 0; } } else { /* load SRAM (max. 64 KB)*/ if (done < 0x10000) { memcpy(sram.sram, buffer, done); memset(sram.sram + done, 0xFF, 0x10000 - done); } else { memcpy(sram.sram, buffer, 0x10000); } /* update CRC */ sram.crc = crc32(0, sram.sram, 0x10000); } free(buffer); GUI_MsgBoxClose(); return 1; } int slot_save(int slot, int device) { char filename[MAXPATHLEN]; unsigned long filesize, done = 0; u8 *buffer; if (slot > 0) { GUI_MsgBoxOpen("Information","Saving State ...",1); /* allocate buffer */ buffer = (u8 *)memalign(32,STATE_SIZE); if (!buffer) { GUI_WaitPrompt("Error","Unable to allocate memory !"); return 0; } filesize = state_save(buffer); } else { /* only save if SRAM is enabled */ if (!sram.on) { GUI_WaitPrompt("Error","Backup RAM disabled !"); return 0; } /* max. supported SRAM size */ filesize = 0x10000; /* only save modified SRAM size */ do { if (sram.sram[filesize-1] != 0xff) break; } while (--filesize > 0); /* only save if SRAM has been modified */ if ((filesize == 0) || (crc32(0, &sram.sram[0], 0x10000) == sram.crc)) { GUI_WaitPrompt("Warning","Backup RAM not modified !"); return 0; } GUI_MsgBoxOpen("Information","Saving Backup RAM ...",1); /* allocate buffer */ buffer = (u8 *)memalign(32, filesize); if (!buffer) { GUI_WaitPrompt("Error","Unable to allocate memory !"); return 0; } /* copy SRAM data */ memcpy(buffer, sram.sram, filesize); /* update CRC */ sram.crc = crc32(0, sram.sram, 0x10000); } /* Device Type */ if (!device) { /* FAT filename */ if (slot > 0) { sprintf(filename, "%s/saves/%s.gp%d", DEFAULT_PATH, rom_filename, slot - 1); } else { sprintf(filename, "%s/saves/%s.srm", DEFAULT_PATH, rom_filename); } /* Open file */ FILE *fp = fopen(filename, "wb"); if (!fp) { GUI_WaitPrompt("Error","Unable to open file !"); free(buffer); return 0; } /* Write from buffer (2k blocks) */ while (filesize > CHUNKSIZE) { fwrite(buffer + done, CHUNKSIZE, 1, fp); done += CHUNKSIZE; filesize -= CHUNKSIZE; } /* Write remaining bytes */ fwrite(buffer + done, filesize, 1, fp); done += filesize; /* Close file */ fclose(fp); free(buffer); /* Close message box */ GUI_MsgBoxClose(); /* Save state screenshot */ if (slot > 0) { sprintf(filename,"%s/saves/%s__%d.png", DEFAULT_PATH, rom_filename, slot - 1); gxSaveScreenshot(filename); } } else { /* Memory Card filename */ if (slot > 0) { sprintf(filename, "MD-%04X.gp%d", rominfo.realchecksum, slot - 1); } else { sprintf(filename, "MD-%04X.srm", rominfo.realchecksum); } /* Initialise the CARD system */ char action[64]; memset(&SysArea, 0, CARD_WORKAREA); CARD_Init("GENP", "00"); /* CARD slot */ device--; /* Attempt to mount the card */ if (!CardMount(device)) { GUI_WaitPrompt("Error","Unable to mount memory card"); free(buffer); return 0; } /* Retrieve sector size */ u32 SectorSize = 0; int CardError = CARD_GetSectorSize(device, &SectorSize); if (!SectorSize) { sprintf(action, "Invalid sector size (%d)", CardError); GUI_WaitPrompt("Error",action); CARD_Unmount(device); free(buffer); return 0; } /* Build output buffer */ u8 *out = (u8 *)memalign(32, filesize + 2112 + 4); if (!out) { GUI_WaitPrompt("Error","Unable to allocate memory !"); CARD_Unmount(device); free(buffer); return 0; } /* Memory Card file header */ char comment[2][32] = { {"Genesis Plus GX"}, {"SRAM Save"} }; strcpy (comment[1], filename); memcpy (&out[0], &icon, 2048); memcpy (&out[2048], &comment[0], 64); /* uncompressed size */ done = filesize; memcpy(&out[2112], &done, 4); /* compress file */ compress2 ((Bytef *)&out[2112 + 4], &filesize, (Bytef *)buffer, done, 9); /* Adjust file size */ filesize = filesize + 4 + 2112; if (filesize % SectorSize) { filesize = ((filesize / SectorSize) + 1) * SectorSize; } /* Check if file already exists */ card_file CardFile; if (CARD_Open(device, filename, &CardFile) == CARD_ERROR_READY) { int size = filesize - CardFile.len; CARD_Close(&CardFile); memset(&CardFile,0,sizeof(CardFile)); /* Check file new size */ if (size > 0) { CardError = CARD_Create(device, "TEMP", size, &CardFile); if (CardError) { sprintf(action, "Unable to increase file size (%d)", CardError); GUI_WaitPrompt("Error",action); CARD_Unmount(device); free(out); free(buffer); return 0; } /* delete temporary file */ CARD_Close(&CardFile); memset(&CardFile,0,sizeof(CardFile)); CARD_Delete(device, "TEMP"); } /* delete previously existing file */ CARD_Delete(device, filename); } /* Create a new file */ CardError = CARD_Create(device, filename, filesize, &CardFile); if (CardError) { sprintf(action, "Unable to create file (%d)", CardError); GUI_WaitPrompt("Error",action); CARD_Unmount(device); free(out); free(buffer); return 0; } /* Update file informations */ time_t rawtime; time(&rawtime); card_stat CardStatus; CARD_GetStatus(device, CardFile.filenum, &CardStatus); CardStatus.icon_addr = 0x0; CardStatus.icon_fmt = 2; CardStatus.icon_speed = 1; CardStatus.comment_addr = 2048; CardStatus.time = rawtime; CARD_SetStatus(device, CardFile.filenum, &CardStatus); /* Write file sectors */ while (filesize > 0) { CARD_Write(&CardFile, &out[done], SectorSize, done); filesize -= SectorSize; done += SectorSize; } /* Close file */ CARD_Close(&CardFile); CARD_Unmount(device); free(out); free(buffer); /* Close message box */ GUI_MsgBoxClose(); } return 1; }