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- /* sd2snes - SD card based universal cartridge for the SNES
- Copyright (C) 2009-2010 Maximilian Rehkopf <otakon@gmx.net>
- AVR firmware portion
- Inspired by and based on code from sd2iec, written by Ingo Korb et al.
- See sdcard.c|h, config.h.
- FAT file system access based on code by ChaN, Jim Brain, Ingo Korb,
- see ff.c|h.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; version 2 of the License only.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- filetypes.c: directory scanning and file type detection
- */
- #include <string.h>
- #include "config.h"
- #include "uart.h"
- #include "filetypes.h"
- #include "ff.h"
- #include "smc.h"
- #include "fileops.h"
- #include "crc.h"
- #include "memory.h"
- #include "led.h"
- #include "sort.h"
- uint16_t scan_flat(const char* path) {
- DIR dir;
- FRESULT res;
- FILINFO fno;
- fno.lfname = NULL;
- res = f_opendir(&dir, (TCHAR*)path);
- uint16_t numentries = 0;
- if (res == FR_OK) {
- for (;;) {
- res = f_readdir(&dir, &fno);
- if(res != FR_OK || fno.fname[0] == 0)break;
- numentries++;
- }
- }
- return numentries;
- }
- uint32_t scan_dir(char* path, FILINFO* fno_param, char mkdb, uint32_t this_dir_tgt) {
- DIR dir;
- FILINFO fno;
- FRESULT res;
- uint8_t len;
- TCHAR* fn;
- static unsigned char depth = 0;
- static uint32_t crc, fncrc;
- static uint32_t db_tgt;
- static uint32_t next_subdir_tgt;
- static uint32_t parent_tgt;
- static uint32_t dir_end = 0;
- /* static uint8_t was_empty = 0;*/
- static uint16_t num_files_total = 0;
- static uint16_t num_dirs_total = 0;
- uint32_t dir_tgt;
- uint32_t switched_dir_tgt = 0;
- uint16_t numentries;
- uint32_t dirsize;
- uint8_t pass = 0;
- char buf[7];
- char *size_units[3] = {" ", "k", "M"};
- uint32_t entry_fsize;
- uint8_t entry_unit_idx;
- uint16_t entrycnt;
- dir_tgt = this_dir_tgt;
- if(depth==0) {
- crc = 0;
- db_tgt = SRAM_DB_ADDR+0x10;
- dir_tgt = SRAM_DIR_ADDR;
- next_subdir_tgt = SRAM_DIR_ADDR;
- this_dir_tgt = SRAM_DIR_ADDR;
- parent_tgt = 0;
- printf("root dir @%lx\n", dir_tgt);
- }
- fno.lfsize = 255;
- fno.lfname = (TCHAR*)file_lfn;
- numentries=0;
- for(pass = 0; pass < (mkdb ? 2 : 1); pass++) {
- if(pass) {
- dirsize = 4*(numentries);
- if(((next_subdir_tgt + dirsize + 8) & 0xff0000) > (next_subdir_tgt & 0xff0000)) {
- printf("switchdir! old=%lX ", next_subdir_tgt + dirsize + 4);
- next_subdir_tgt &= 0xffff0000;
- next_subdir_tgt += 0x00010004;
- printf("new=%lx\n", next_subdir_tgt);
- dir_tgt &= 0xffff0000;
- dir_tgt += 0x00010004;
- }
- switched_dir_tgt = dir_tgt;
- next_subdir_tgt += dirsize + 4;
- if(parent_tgt) next_subdir_tgt += 4;
- if(next_subdir_tgt > dir_end) {
- dir_end = next_subdir_tgt;
- }
- DBG_FS printf("path=%s depth=%d ptr=%lx entries=%d parent=%lx next subdir @%lx\n", path, depth, db_tgt, numentries, parent_tgt, next_subdir_tgt);
- if(mkdb) {
- num_dirs_total++;
- // printf("d=%d Saving %lx to Address %lx [end]\n", depth, 0L, next_subdir_tgt - 4);
- sram_writelong(0L, next_subdir_tgt - 4);
- }
- }
- if(fno_param) {
- res = dir_open_by_filinfo(&dir, fno_param);
- } else {
- res = f_opendir(&dir, path);
- }
- if (res == FR_OK) {
- if(pass && parent_tgt && mkdb) {
- /* write backlink to parent dir
- switch to next bank if record does not fit in current bank */
- if((db_tgt&0xffff) > ((0x10000-(sizeof(next_subdir_tgt)+sizeof(len)+4))&0xffff)) {
- printf("switch! old=%lx ", db_tgt);
- db_tgt &= 0xffff0000;
- db_tgt += 0x00010000;
- printf("new=%lx\n", db_tgt);
- }
- // printf("writing link to parent, %lx to address %lx [../]\n", parent_tgt-SRAM_MENU_ADDR, db_tgt);
- sram_writelong((parent_tgt-SRAM_MENU_ADDR), db_tgt);
- sram_writebyte(0, db_tgt+sizeof(next_subdir_tgt));
- sram_writeblock("../\0", db_tgt+sizeof(next_subdir_tgt)+sizeof(len), 4);
- sram_writelong((db_tgt-SRAM_MENU_ADDR)|((uint32_t)0x81<<24), dir_tgt);
- db_tgt += sizeof(next_subdir_tgt)+sizeof(len)+4;
- dir_tgt += 4;
- }
- len = strlen((char*)path);
- /* scan at most DIR_FILE_MAX entries per directory */
- for(entrycnt=0; entrycnt < DIR_FILE_MAX; entrycnt++) {
- // toggle_read_led();
- res = f_readdir(&dir, &fno);
- if (res != FR_OK || fno.fname[0] == 0) {
- if(pass) {
- /* if(!numentries) was_empty=1;*/
- }
- break;
- }
- fn = *fno.lfname ? fno.lfname : fno.fname;
- if ((*fn == '.') || !(strncasecmp(fn, SYS_DIR_NAME, sizeof(SYS_DIR_NAME)))) continue;
- if (fno.fattrib & AM_DIR) {
- depth++;
- if(depth < FS_MAX_DEPTH) {
- numentries++;
- if(pass && mkdb) {
- path[len]='/';
- strncpy(path+len+1, (char*)fn, sizeof(fs_path)-len);
- uint16_t pathlen = 0;
- uint32_t old_db_tgt = 0;
- if(mkdb) {
- pathlen = strlen(path);
- DBG_FS printf("d=%d Saving %lx to Address %lx [dir]\n", depth, db_tgt, dir_tgt);
- /* save element:
- - path name
- - pointer to sub dir structure */
- if((db_tgt&0xffff) > ((0x10000-(sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2))&0xffff)) {
- printf("switch! old=%lx ", db_tgt);
- db_tgt &= 0xffff0000;
- db_tgt += 0x00010000;
- printf("new=%lx\n", db_tgt);
- }
- /* write element pointer to current dir structure */
- sram_writelong((db_tgt-SRAM_MENU_ADDR)|((uint32_t)0x80<<24), dir_tgt);
- /* save element:
- - path name
- - pointer to sub dir structure
- moved below */
- old_db_tgt = db_tgt;
- db_tgt += sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2;
- }
- parent_tgt = this_dir_tgt;
- /* scan subdir before writing current dir element to account for bank switches */
- uint32_t corrected_subdir_tgt = scan_dir(path, &fno, mkdb, next_subdir_tgt);
- if(mkdb) {
- DBG_FS printf(" Saving dir descriptor to %lx tgt=%lx, path=%s\n", old_db_tgt, corrected_subdir_tgt, path);
- sram_writelong((corrected_subdir_tgt-SRAM_MENU_ADDR), old_db_tgt);
- sram_writebyte(len+1, old_db_tgt+sizeof(next_subdir_tgt));
- sram_writeblock(path, old_db_tgt+sizeof(next_subdir_tgt)+sizeof(len), pathlen);
- sram_writeblock("/\0", old_db_tgt + sizeof(next_subdir_tgt) + sizeof(len) + pathlen, 2);
- }
- dir_tgt += 4;
- /* was_empty = 0;*/
- } else if(!mkdb) {
- path[len]='/';
- strncpy(path+len+1, (char*)fn, sizeof(fs_path)-len);
- scan_dir(path, &fno, mkdb, next_subdir_tgt);
- }
- }
- depth--;
- path[len]=0;
- } else {
- SNES_FTYPE type = determine_filetype((char*)fn);
- if(type != TYPE_UNKNOWN) {
- numentries++;
- if(pass) {
- if(mkdb) {
- num_files_total++;
- /* snes_romprops_t romprops; */
- path[len]='/';
- strncpy(path+len+1, (char*)fn, sizeof(fs_path)-len);
- uint16_t pathlen = strlen(path);
- switch(type) {
- case TYPE_IPS:
- case TYPE_SMC:
- case TYPE_SPC:
- /* write element pointer to current dir structure */
- DBG_FS printf("d=%d Saving %lX to Address %lX [file %s]\n", depth, db_tgt, dir_tgt, path);
- if((db_tgt&0xffff) > ((0x10000-(sizeof(len) + pathlen + sizeof(buf)-1 + 1))&0xffff)) {
- printf("switch! old=%lx ", db_tgt);
- db_tgt &= 0xffff0000;
- db_tgt += 0x00010000;
- printf("new=%lx\n", db_tgt);
- }
- sram_writelong((db_tgt-SRAM_MENU_ADDR) | ((uint32_t)type << 24), dir_tgt);
- dir_tgt += 4;
- /* save element:
- - index of last slash character
- - file name
- - file size */
- /* sram_writeblock((uint8_t*)&romprops, db_tgt, sizeof(romprops)); */
- entry_fsize = fno.fsize;
- entry_unit_idx = 0;
- while(entry_fsize > 9999) {
- entry_fsize >>= 10;
- entry_unit_idx++;
- }
- snprintf(buf, sizeof(buf), "% 5ld", entry_fsize);
- strncat(buf, size_units[entry_unit_idx], 1);
- sram_writeblock(buf, db_tgt, sizeof(buf)-1);
- sram_writebyte(len+1, db_tgt + sizeof(buf)-1);
- sram_writeblock(path, db_tgt + sizeof(len) + sizeof(buf)-1, pathlen + 1);
- // sram_writelong(fno.fsize, db_tgt + sizeof(len) + pathlen + 1);
- db_tgt += sizeof(len) + pathlen + sizeof(buf)-1 + 1;
- break;
- case TYPE_UNKNOWN:
- default:
- break;
- }
- path[len] = 0;
- /* printf("%s ", path);
- _delay_ms(30); */
- }
- } else {
- TCHAR* fn2 = fn;
- fncrc = 0;
- while(*fn2 != 0) {
- fncrc += crc_xmodem_update(fncrc, *((unsigned char*)fn2++));
- }
- crc += fncrc;
- }
- }
- }
- }
- } else uart_putc(0x30+res);
- }
- DBG_FS printf("db_tgt=%lx dir_end=%lx\n", db_tgt, dir_end);
- sram_writelong(db_tgt, SRAM_DB_ADDR+4);
- sram_writelong(dir_end, SRAM_DB_ADDR+8);
- sram_writeshort(num_files_total, SRAM_DB_ADDR+12);
- sram_writeshort(num_dirs_total, SRAM_DB_ADDR+14);
- if(depth==0) return crc;
- else return switched_dir_tgt;
- return was_empty; // tricky!
- }
- SNES_FTYPE determine_filetype(char* filename) {
- char* ext = strrchr(filename, '.');
- if(ext == NULL)
- return TYPE_UNKNOWN;
- if( (!strcasecmp(ext+1, "SMC"))
- ||(!strcasecmp(ext+1, "SFC"))
- ||(!strcasecmp(ext+1, "FIG"))
- ||(!strcasecmp(ext+1, "BS"))
- ) {
- return TYPE_SMC;
- }
- /* if( (!strcasecmp(ext+1, "IPS"))
- ||(!strcasecmp(ext+1, "UPS"))
- ) {
- return TYPE_IPS;
- }*/
- if(!strcasecmp(ext+1, "SPC")) {
- return TYPE_SPC;
- }
- return TYPE_UNKNOWN;
- }
- FRESULT get_db_id(uint32_t* id) {
- file_open((uint8_t*)"/sd2snes/sd2snes.db", FA_READ);
- if(file_res == FR_OK) {
- file_readblock(id, 0, 4);
- /* XXX */// *id=0xdead;
- file_close();
- } else {
- *id=0xdeadbeef;
- }
- return file_res;
- }
- int get_num_dirent(uint32_t addr) {
- int result = 0;
- while(sram_readlong(addr+result*4)) {
- result++;
- }
- return result;
- }
- void sort_all_dir(uint32_t endaddr) {
- uint32_t entries = 0;
- uint32_t current_base = SRAM_DIR_ADDR;
- while(current_base<(endaddr)) {
- while(sram_readlong(current_base+entries*4)) {
- entries++;
- }
- printf("sorting dir @%lx, entries: %ld\n", current_base, entries);
- sort_dir(current_base, entries);
- current_base += 4*entries + 4;
- entries = 0;
- }
- }
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