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start implment lowlevel io

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This commit is contained in:
David Voswinkel 2009-05-23 21:06:15 +02:00
parent efe6ba19c4
commit c8afff5630
4 changed files with 73 additions and 2 deletions
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2
snes/irqtest/irqtest.asm
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@ -69,6 +69,8 @@ Infinity:
;----------------------------------------------------------------------------
; Out: None
;----------------------------------------------------------------------------
SetupVideo:
php

55
tools/ffsample/linux/diskio.c
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@ -14,18 +14,57 @@ using 0xf8 media descriptor, with 8192 sectors;
file system has 2 32-bit FATs and 1 sector per cluster.
FAT size is 63 sectors, and provides 8034 clusters.
Volume ID is 4a1424ec, no volume label.
filesize 4194304
*/
/* 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
*/
/*-----------------------------------------------------------------------*/
/* Initialize Disk Drive */
/*-----------------------------------------------------------------------*/
#define IMAGE_NAME "disk00.vfat"
int image_addr;
DSTATUS disk_initialize (BYTE drv) {
if (drv) return STA_NOINIT; /* Supports only single drive */
Stat |= STA_NOINIT;
/* map image */
int fd = open(IMAGE_NAME,);
int size = fseek(END);
fseek(0);
image_addr = mmap(0,fd,)
Stat &= ~STA_NOINIT; /* When device goes ready, clear STA_NOINIT */
return Stat;
}
@ -56,6 +95,14 @@ DRESULT disk_read (
if (drv || !count) return RES_PARERR;
if (Stat & STA_NOINIT) return RES_NOTRDY;
printf("disk_read: sector=%i count=%i\n",sector,count);
DWORD offset = sector * 512;
DWORD size = count * 512;
printf("disk_read: addr=%p offset=%i size=%i\n",image_addr,offset,size);
memcpy(buff,image_addr + offset,size);
/* Issue Read Setor(s) command */
/*
write_ata(REG_COUNT, count);
@ -84,6 +131,7 @@ DRESULT disk_write (
BYTE s, c, iowr_l, iowr_h;
if (drv || !count) return RES_PARERR;
if (Stat & STA_NOINIT) return RES_NOTRDY;
@ -120,29 +168,36 @@ DRESULT disk_ioctl (
switch (ctrl) {
case GET_SECTOR_COUNT : /* Get number of sectors on the disk (DWORD) */
printf("disk_ioctl: GET_SECTOR_COUNT\n");
ofs = 60; w = 2; n = 0;
break;
case GET_SECTOR_SIZE : /* Get sectors on the disk (WORD) */
printf("disk_ioctl: GET_SECTOR_SIZE\n");
*(WORD*)buff = 512;
return RES_OK;
case GET_BLOCK_SIZE : /* Get erase block size in sectors (DWORD) */
printf("disk_ioctl: GET_BLOCK_SIZE\n");
*(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;

BIN
tools/ffsample/linux/fftest Normal file → Executable file
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16
tools/ffsample/linux/main.c
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@ -137,7 +137,7 @@ FRESULT scan_files (char* path)
static
void put_rc (FRESULT rc)
void _put_rc (FRESULT rc)
{
const char* str[] = {
"OK",
@ -160,7 +160,21 @@ void put_rc (FRESULT rc)
printf("rc=%u FR_%s\n", (WORD)rc, str[rc]);
}
static
void put_rc (FRESULT rc)
{
const char *p;
static const char str[] =
"OK\0" "NOT_READY\0" "NO_FILE\0" "FR_NO_PATH\0" "INVALID_NAME\0" "INVALID_DRIVE\0"
"DENIED\0" "EXIST\0" "RW_ERROR\0" "WRITE_PROTECTED\0" "NOT_ENABLED\0"
"NO_FILESYSTEM\0" "INVALID_OBJECT\0" "MKFS_ABORTED\0";
FRESULT i;
for (p = str, i = 0; i != rc && *p; i++) {
while(*p++);
}
xprintf("rc=%u FR_%s\n", (WORD)rc, p);
}
static