123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273 |
- /* 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 <stdio.h>
- #include <string.h>
- #include <avr/pgmspace.h>
- #include <util/delay.h>
- #include "config.h"
- #include "uart.h"
- #include "filetypes.h"
- #include "ff.h"
- #include "smc.h"
- #include "fileops.h"
- #include "crc16.h"
- #include "memory.h"
- #include "led.h"
- uint16_t scan_flat(const char* path) {
- DIR dir;
- FRESULT res;
- FILINFO fno;
- fno.lfn = NULL;
- res = f_opendir(&dir, (unsigned char*)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;
- }
- uint16_t scan_dir(char* path, char mkdb, uint32_t this_dir_tgt) {
- DIR dir;
- FILINFO fno;
- FRESULT res;
- uint8_t len;
- unsigned char* fn;
- static unsigned char depth = 0;
- static uint16_t crc;
- 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;
- uint32_t dir_tgt;
- uint16_t numentries;
- uint32_t dirsize;
- uint8_t pass = 0;
- 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;
- dprintf("root dir @%lx\n", dir_tgt);
- }
-
- fno.lfn = file_lfn;
- numentries=0;
- for(pass = 0; pass < 2; pass++) {
- if(pass) {
- dirsize = 4*(numentries);
- // dir_tgt_next = dir_tgt + dirsize + 4; // number of entries + end marker
- next_subdir_tgt += dirsize + 4;
- if(parent_tgt) next_subdir_tgt += 4;
- if(next_subdir_tgt > dir_end) {
- dir_end = next_subdir_tgt;
- }
- dprintf("path=%s depth=%d ptr=%lx entries=%d parent=%lx next subdir @%lx\n", path, depth, db_tgt, numentries, parent_tgt, next_subdir_tgt /*dir_tgt_next*/);
- // _delay_ms(50);
- if(mkdb) {
- dprintf("d=%d Saving %lX to Address %lX [end]\n", depth, 0L, next_subdir_tgt - 4);
- // _delay_ms(50);
- sram_writelong(0L, next_subdir_tgt - 4);
- }
- }
- res = f_opendir(&dir, (unsigned char*)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)) {
- dprintf("switch! old=%lx ", db_tgt);
- db_tgt &= 0xffff0000;
- db_tgt += 0x00010000;
- dprintf("new=%lx\n", 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)0x80<<24), dir_tgt);
- db_tgt += sizeof(next_subdir_tgt)+sizeof(len)+4;
- dir_tgt += 4;
- }
- len = strlen((char*)path);
- for (;;) {
- toggle_busy_led();
- res = f_readdir(&dir, &fno);
- if (res != FR_OK || fno.fname[0] == 0) {
- if(pass) {
- if(!numentries) was_empty=1;
- }
- break;
- }
- fn = *fno.lfn ? fno.lfn : fno.fname;
- // dprintf("%s\n", fn);
- // _delay_ms(100);
- if (*fn == '.') continue;
- if (fno.fattrib & AM_DIR) {
- numentries++;
- if(pass) {
- path[len]='/';
- strncpy(path+len+1, (char*)fn, sizeof(fs_path)-len);
- depth++;
- if(mkdb) {
- uint16_t pathlen = strlen(path);
- // write element pointer to current dir structure
- dprintf("d=%d Saving %lX to Address %lX [dir]\n", depth, db_tgt, dir_tgt);
- // _delay_ms(50);
- sram_writelong((db_tgt-SRAM_MENU_ADDR)|((uint32_t)0x80<<24), dir_tgt);
- // sram_writeblock((uint8_t*)&db_tgt, dir_tgt_save, sizeof(dir_tgt_save));
- // save element:
- // - path name
- // - pointer to sub dir structure
- if((db_tgt&0xffff) > ((0x10000-(sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2))&0xffff)) {
- dprintf("switch! old=%lx ", db_tgt);
- db_tgt &= 0xffff0000;
- db_tgt += 0x00010000;
- dprintf("new=%lx\n", db_tgt);
- }
- dprintf(" Saving dir descriptor to %lX, tgt=%lX, path=%s\n", db_tgt, next_subdir_tgt, path);
- // _delay_ms(100);
- sram_writelong((next_subdir_tgt-SRAM_MENU_ADDR), db_tgt);
- sram_writebyte(len+1, db_tgt+sizeof(next_subdir_tgt));
- sram_writeblock(path, db_tgt+sizeof(next_subdir_tgt)+sizeof(len), pathlen);
- sram_writeblock("/\0", db_tgt + sizeof(next_subdir_tgt) + sizeof(len) + pathlen, 2);
- // sram_writeblock((uint8_t*)&dir_tgt, db_tgt+256, sizeof(dir_tgt));
- db_tgt += sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2;
- }
- parent_tgt = this_dir_tgt;
- scan_dir(path, mkdb, next_subdir_tgt);
- dir_tgt += 4;
- // if(was_empty)dir_tgt_next += 4;
- was_empty = 0;
- depth--;
- path[len]=0;
- }
- } else {
- SNES_FTYPE type = determine_filetype((char*)fn);
- if(type != TYPE_UNKNOWN) {
- numentries++;
- if(pass) {
- if(mkdb) {
- 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_SMC:
- // XXX file_open_by_filinfo(&fno);
- // XXX if(file_res){
- // XXX dprintf("ZOMG NOOOO %d\n", file_res);
- // XXX _delay_ms(30);
- // XXX }
- // XXX smc_id(&romprops);
- // XXX file_close();
- // _delay_ms(30);
- // write element pointer to current dir structure
- // dprintf("d=%d Saving %lX to Address %lX [file]\n", depth, db_tgt, dir_tgt);
- // _delay_ms(50);
- if((db_tgt&0xffff) > ((0x10000-(sizeof(romprops) + sizeof(len) + pathlen + 1))&0xffff)) {
- dprintf("switch! old=%lx ", db_tgt);
- db_tgt &= 0xffff0000;
- db_tgt += 0x00010000;
- dprintf("new=%lx\n", db_tgt);
- }
- sram_writelong((db_tgt-SRAM_MENU_ADDR), dir_tgt);
- // sram_writeblock((uint8_t*)&db_tgt, dir_tgt, sizeof(db_tgt));
- dir_tgt += 4;
- // save element:
- // - SNES header information
- // - file name
- sram_writeblock((uint8_t*)&romprops, db_tgt, sizeof(romprops));
- sram_writebyte(len+1, db_tgt + sizeof(romprops));
- sram_writeblock(path, db_tgt + sizeof(romprops) + sizeof(len), pathlen + 1);
- db_tgt += sizeof(romprops) + sizeof(len) + pathlen + 1;
- break;
- case TYPE_UNKNOWN:
- default:
- break;
- }
- path[len]=0;
- // dprintf("%s ", path);
- // _delay_ms(30);
- }
- } else {
- unsigned char* sfn = fno.fname;
- while(*sfn != 0) {
- crc += crc16_update(crc, sfn++, 1);
- }
- }
- }
- // dprintf("%s/%s\n", path, fn);
- // _delay_ms(50);
- }
- }
- } else uart_putc(0x30+res);
- }
- // dprintf("%x\n", crc);
- // _delay_ms(50);
- sram_writelong(db_tgt, SRAM_DB_ADDR+4);
- sram_writelong(dir_end, SRAM_DB_ADDR+8);
- return crc;
- }
- SNES_FTYPE determine_filetype(char* filename) {
- char* ext = strrchr(filename, '.');
- if(ext == NULL)
- return TYPE_UNKNOWN;
- if(!strcasecmp_P(ext+1, PSTR("SMC"))) {
- return TYPE_SMC;
- }/* later
- if(!strcasecmp_P(ext+1, PSTR("SRM"))) {
- return TYPE_SRM;
- }
- if(!strcasecmp_P(ext+1, PSTR("SPC"))) {
- return TYPE_SPC;
- }*/
- return TYPE_UNKNOWN;
- }
- FRESULT get_db_id(uint16_t* id) {
- file_open((uint8_t*)"/sd2snes/sd2snes.db", FA_READ);
- if(file_res == FR_OK) {
- file_readblock(id, 0, 2);
- /* XXX */// *id=0xdead;
- file_close();
- } else {
- *id=0xdead;
- }
- return file_res;
- }
|