/*
*
* A Random Hacker MacBook Air SuperDrive enabler
* No guarantee
* The MBA SuperDrive needs 1100mA supply from the host USB Port
* No promises if you ignore this.
*
* This is a first attempt ‚ I don‚ think the enabler packet is optimal
* It could probably be improved ‚but hey I just wanted to prove a point.
*
* BTW ‚ the firmware on the ATA->USB bridge board can be rewritten
* You would then be able to have this fix applied permanently.
* Hint: vend_ax , also Cy4611B is useful here ( processCBW )
*
* This code is for Linux I'm sure the same could be performed under windows
* gcc -o mba_powerup mba_powerup.c
*/
#include <fcntl.h>
#include <sys/ioctl.h>
#include <scsi/sg.h>
#include <stdio.h>
#include <string.h>
void mba_powerup (const char *device)
{
int fd;
sg_io_hdr_t IO_hdr;
// The magic incantation
unsigned char magic[] = {0xea,0x00,0x00,0x00,0x00,0x00,0x01};
unsigned char sbuf[32];
unsigned char dxfp[32];

fd = open(device, O_RDWR|O_NONBLOCK);
if (fd < 0) {
fprintf(stderr, "Error opening device \"%s\".\n", device);
return;
}
else {
memset(&IO_hdr, 0, sizeof(sg_io_hdr_t));
IO_hdr.interface_id = 'S';
IO_hdr.cmd_len = sizeof(magic);
IO_hdr.mx_sb_len = sizeof(sbuf);
IO_hdr.dxfer_direction = SG_DXFER_TO_DEV;
IO_hdr.dxfer_len = sizeof(dxfp);
IO_hdr.dxferp = dxfp;
IO_hdr.cmdp = magic;
IO_hdr.sbp = sbuf;
IO_hdr.timeout = 1000;
if ( ioctl(fd, SG_IO, &IO_hdr)< 0) {
fprintf(stderr, "Error powering MBA SuperDrive.\n");
return;
}
close(fd);
}
}

// Usage: "mba_powerup /dev/dvd" (obviously change this to the appropriate device for your system)
int main(int argc,char **argv)
{
mba_powerup(argv[1]);
return 0;
}