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o add snes fatfs dummy

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o add fatfs custom chip to bsnes
o finishes fatfs linux backend smaple
This commit is contained in:
david
2009-05-26 17:07:39 +02:00
parent 0fd42d7b1d
commit 660767c464
33 changed files with 1241 additions and 121 deletions
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82
tools/ffsample/linux/diskio.c
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@@ -5,63 +5,22 @@
static volatile
DSTATUS Stat = STA_NOINIT; /* Disk status */
/*
sudo losetup /dev/loop0 disk00.vfat
sudo mkfs.vfat -f 2 -F 16 -v /dev/loop0
mkfs.vfat 2.11 (12 Mar 2005)
Loop device does not match a floppy size, using default hd params
/dev/loop0 has 64 heads and 32 sectors per track,
logical sector size is 512,
using 0xf8 media descriptor, with 524288 sectors;
file system has 2 16-bit FATs and 8 sectors per cluster.
FAT size is 256 sectors, and provides 65467 clusters.
Root directory contains 512 slots.
Volume ID is 4a1aab3d, no volume label.
FAT type = 2
Bytes/Cluster = 4096
Number of FATs = 2
Root DIR entries = 512
Sectors/FAT = 256
Number of clusters = 65467
FAT start (lba) = 1
DIR start (lba,clustor) = 513
Data start (lba) = 545
Ok
disk_read: sector=513 count=1 addr=0xa8009800 size=512
scan_files ret
0 files, 0 bytes.
0 folders.
261868 KB total disk space.
147456 KB available.
*/
/* Interface
** Scratch Buffer
addr 3 byte
size 1 byte
** Call Interface
cmd 1 byte
sector 4 bytes
count 1 byte
return 1 byte
** Commands
* disk_init
* disk_read
* disk_write
*/
/*-----------------------------------------------------------------------*/
@@ -77,7 +36,6 @@ return 1 byte
#include <sys/mman.h>
#include <string.h>
#define IMAGE_NAME "disk00.vfat"
char *image_addr;
@@ -86,8 +44,6 @@ DSTATUS disk_initialize (BYTE drv) {
if (drv) return STA_NOINIT; /* Supports only single drive */
Stat |= STA_NOINIT;
/* map image */
int fd = open(IMAGE_NAME, O_RDWR);
if (fd == -1) {
@@ -95,11 +51,9 @@ DSTATUS disk_initialize (BYTE drv) {
exit(EXIT_FAILURE);
}
int size = lseek(fd,0,SEEK_END);
lseek(fd,0,SEEK_SET);
printf("Open Image (size %i)\n",size);
image_addr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (image_addr == MAP_FAILED) {
@@ -140,11 +94,8 @@ DRESULT disk_read (
DWORD offset = sector * 512;
int size = count * 512;
printf("disk_read: sector=%li count=%i addr=%p off=%li size=%i\n",sector,count,image_addr + offset,offset,size);
memcpy(buff,image_addr + offset,size);
//printf("%x %x %x %x\n",buff[0],buff[1],buff[2],buff[3]);
return RES_OK;
}
@@ -160,16 +111,12 @@ DRESULT disk_write (
BYTE count /* Sector count (1..255) */
)
{
BYTE s, c, iowr_l, iowr_h;
if (drv || !count) return RES_PARERR;
if (Stat & STA_NOINIT) return RES_NOTRDY;
DWORD offset = sector * 512;
int size = count * 512;
printf("disk_write: sector=%li count=%i addr=%p off=%li size=%i\n",sector,count,image_addr + offset,offset,size);
memcpy(image_addr + offset,buff,size);
return RES_OK;
@@ -209,38 +156,9 @@ DRESULT disk_ioctl (
*(DWORD*)buff = 32;
return RES_OK;
case CTRL_SYNC : /* Nothing to do */
printf("disk_ioctl: CTRL_SIZE\n");
return RES_OK;
case ATA_GET_REV : /* Get firmware revision (8 chars) */
printf("disk_ioctl: ATAL_GET_REV\n");
ofs = 23; w = 4; n = 4;
break;
case ATA_GET_MODEL : /* Get model name (40 chars) */
printf("disk_ioctl: ATAL_GET_MODEL\n");
ofs = 27; w = 20; n = 20;
break;
case ATA_GET_SN : /* Get serial number (20 chars) */
printf("disk_ioctl: ATAL_GET_SN\n");
ofs = 10; w = 10; n = 10;
break;
default:
return RES_PARERR;
}
/*
write_ata(REG_COMMAND, CMD_IDENTIFY);
if (!wait_data()) return RES_ERROR;
read_part(ptr, ofs, w);
while (n--) {
dl = *ptr; dh = *(ptr+1);
*ptr++ = dh; *ptr++ = dl;
}
*/
return RES_OK;
}
#endif /* _USE_IOCTL != 0 */