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probutus @ http://www.xboxhacker.net/index.php?option=com_smf&Itemid33&topic=350.msg3802#msg3802
I got the GDR-3120L drive running in linux without using ide-scsi but only patching the ide-cd driver== (And I could browse the VIDEO_TS and AUDIO_TS part of an 360 disc-> someone will have to add some unlock code into the "faking capabilities section"...)==
I could mount and access several standard discs just like in every other cdrom (still used my sata->pata converter)
The only thing I had to do was to prevent the ide-cd module to send the GPMODE_CAPABILITIES_PAGE sense-package to the cdrom but fake the capabilities instead.
See the code to change in linux/drivers/ide/ide-cd.c below. (All other attached cd/dvd drives will continue working unaffected)
exchange the function ide_cdrom_get_capabilities() with this one:
static int ide_cdrom_get_capabilities(ide_drive_t _drive, struct atapi_capabilities_page _cap)
{
struct cdrom_info *info = drive->driver_data;
struct cdrom_device_info *cdi = &info->devinfo;
struct packet_command cgc;
int stat=0, attempts 3, size = sizeof(*cap);
/*
* ACER50 (and others?) require the full spec length mode sense
* page capabilities size, but older drives break.
*/
if (=(!strcmp(drive->id->model, "ATAPI CD ROM DRIVE 50X MAX") |||=
=strcmp(drive->id->model, "WPI CDS-32X")))=
size -= sizeof(cap->pad);
if (strcmp(drive->id->model, "HL-DT-STDVD-ROM GDR3120L"))
{
init_cdrom_command(&cgc, cap, size, CGC_DATA_UNKNOWN);
do { /_ we seem to get stat=0x01,err0x00 the first time (??) _/
stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
if (=stat)=
break;
} while (--attempts);
}
else
{
/_ the GDR3120L does not support the GPMODE_CAPABILITIES_PAGE command so we have to fake it _/
printk("GDR3120L detected=->faking capabilities
");=
memset(cap,0,sizeof(struct atapi_capabilities_page));
cap->dvd_r_read=1;
cap->dvd_rom=1;
cap->method2=1;
cap->cd_rw_read=1;
cap->cd_r_read=1;
cap->multisession=1;
cap->mode2_form2=1;
cap->mode2_form1=1;
cap->audio_play=1;
cap->composite=1;
cap->isrc=1;
cap->cdda=1;
cap->upc=1;
cap->maxspeed=35344;
cap->buffer_size=8;
cap->curspeed=35844;
}
return stat;
}