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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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