static int mcdx_transfer(struct s_drive_stuff *stuffp,
char *p, int sector, int nr_sectors)
/* This seems to do the actually transfer. But it does more. It
keeps track of errors occurred and will (if possible) fall back
to single speed on error.
Return: -1 on timeout or other error
else status byte (as in stuff->st) */
{
int ans;
ans = mcdx_xfer(stuffp, p, sector, nr_sectors);
return ans;
#ifdef FALLBACK
if (-1 == ans)
stuffp->readerrs++;
else
return ans;
if (stuffp->readerrs && stuffp->readcmd == READ1X) {
xwarn("XXX Already reading 1x -- no chance\n");
return -1;
}
xwarn("XXX Fallback to 1x\n");
stuffp->readcmd = READ1X;
return mcdx_transfer(stuffp, p, sector, nr_sectors);
#endif
}
static int mcdx_open(struct cdrom_device_info *cdi, int purpose)
{
struct s_drive_stuff *stuffp;
xtrace(OPENCLOSE, "open()\n");
stuffp = cdi->handle;
if (!stuffp->present)
return -ENXIO;
/* Make the modules looking used ... (thanx bjorn).
* But we shouldn't forget to decrement the module counter
* on error return */
/* this is only done to test if the drive talks with us */
if (-1 == mcdx_getstatus(stuffp, 1))
return -EIO;
if (stuffp->xxx) {
xtrace(OPENCLOSE, "open() media changed\n");
stuffp->audiostatus = CDROM_AUDIO_INVALID;
stuffp->readcmd = 0;
xtrace(OPENCLOSE, "open() Request multisession info\n");
if (-1 ==
mcdx_requestmultidiskinfo(stuffp, &stuffp->multi, 6))
xinfo("No multidiskinfo\n");
} else {
/* multisession ? */
if (!stuffp->multi.multi)
stuffp->multi.msf_last.second = 2;
xtrace(OPENCLOSE, "open() MS: %d, last @ %02x:%02x.%02x\n",
stuffp->multi.multi,
stuffp->multi.msf_last.minute,
stuffp->multi.msf_last.second,
stuffp->multi.msf_last.frame);
{;
} /* got multisession information */
/* request the disks table of contents (aka diskinfo) */
if (-1 == mcdx_requesttocdata(stuffp, &stuffp->di, 1)) {
stuffp->lastsector = -1;
} else {
stuffp->lastsector = (CD_FRAMESIZE / 512)
* msf2log(&stuffp->di.msf_leadout) - 1;
xtrace(OPENCLOSE,
"open() start %d (%02x:%02x.%02x) %d\n",
stuffp->di.n_first,
stuffp->di.msf_first.minute,
stuffp->di.msf_first.second,
stuffp->di.msf_first.frame,
msf2log(&stuffp->di.msf_first));
xtrace(OPENCLOSE,
"open() last %d (%02x:%02x.%02x) %d\n",
stuffp->di.n_last,
stuffp->di.msf_leadout.minute,
stuffp->di.msf_leadout.second,
stuffp->di.msf_leadout.frame,
msf2log(&stuffp->di.msf_leadout));
}
if (stuffp->toc) {
xtrace(MALLOC, "open() free old toc @ %p\n",
stuffp->toc);
kfree(stuffp->toc);
stuffp->toc = NULL;
}
xtrace(OPENCLOSE, "open() init irq generation\n");
if (-1 == mcdx_config(stuffp, 1))
return -EIO;
#ifdef FALLBACK
/* Set the read speed */
xwarn("AAA %x AAA\n", stuffp->readcmd);
if (stuffp->readerrs)
stuffp->readcmd = READ1X;
else
stuffp->readcmd =
stuffp->present | SINGLE ? READ1X : READ2X;
xwarn("XXX %x XXX\n", stuffp->readcmd);
#else
stuffp->readcmd =
stuffp->present | SINGLE ? READ1X : READ2X;
#endif
/* try to get the first sector, iff any ... */
if (stuffp->lastsector >= 0) {
char buf[512];
int ans;
int tries;
stuffp->xa = 0;
stuffp->audio = 0;
for (tries = 6; tries; tries--) {
stuffp->introk = 1;
xtrace(OPENCLOSE, "open() try as %s\n",
stuffp->xa ? "XA" : "normal");
/* set data mode */
if (-1 == (ans = mcdx_setdatamode(stuffp,
stuffp->
xa ?
MODE2 :
MODE1,
1))) {
/* return -EIO; */
stuffp->xa = 0;
break;
}
if ((stuffp->audio = e_audio(ans)))
break;
while (0 ==
(ans =
mcdx_transfer(stuffp, buf, 0, 1)));
if (ans == 1)
break;
stuffp->xa = !stuffp->xa;
}
}
/* xa disks will be read in raw mode, others not */
if (-1 == mcdx_setdrivemode(stuffp,
stuffp->xa ? RAW : COOKED,
1))
return -EIO;
if (stuffp->audio) {
xinfo("open() audio disk found\n");
} else if (stuffp->lastsector >= 0) {
xinfo("open() %s%s disk found\n",
stuffp->xa ? "XA / " : "",
stuffp->multi.
multi ? "Multi Session" : "Single Session");
}
}
stuffp->xxx = 0;
stuffp->users++;
return 0;
}
static void do_mcdx_request(request_queue_t * q)
{
struct s_drive_stuff *stuffp;
struct request *req;
again:
req = elv_next_request(q);
if (!req)
return;
stuffp = req->rq_disk->private_data;
if (!stuffp->present) {
xwarn("do_request(): bad device: %s\n",req->rq_disk->disk_name);
xtrace(REQUEST, "end_request(0): bad device\n");
end_request(req, 0);
return;
}
if (stuffp->audio) {
xwarn("do_request() attempt to read from audio cd\n");
xtrace(REQUEST, "end_request(0): read from audio\n");
end_request(req, 0);
return;
}
xtrace(REQUEST, "do_request() (%lu + %lu)\n",
req->sector, req->nr_sectors);
if (req->cmd != READ) {
xwarn("do_request(): non-read command to cd!!\n");
xtrace(REQUEST, "end_request(0): write\n");
end_request(req, 0);
return;
}
else {
stuffp->status = 0;
while (req->nr_sectors) {
int i;
i = mcdx_transfer(stuffp,
req->buffer,
req->sector,
req->nr_sectors);
if (i == -1) {
end_request(req, 0);
goto again;
}
req->sector += i;
req->nr_sectors -= i;
req->buffer += (i * 512);
}
end_request(req, 1);
goto again;
xtrace(REQUEST, "end_request(1)\n");
end_request(req, 1);
}
goto again;
}