[Kos-dev] ATA & LBA : new experimentations

[Christophe]

Mais c'est quoi ce délire !!!!! personne ne me reçoit !?????

----- Original Message -----
From: Christophe <hlide@club-internet.fr>
To: <kos-dev@enix.org>
Sent: Saturday, February 16, 2002 12:07 PM
Subject: Re: [Kos-dev] ATA & LBA : new experimentations


> Dis Thomas, est-ce que tu as reçu mon dernier email ? je t'ai dit de
mettre
> des parenthèses pour l'opérateur "? :"
>
> là où tu as :
>   outb(ATA_D_IBM
>        | (harddisk->device == MASTER) ? ATA_MASTER : ATA_SLAVE
>        | head,
>        ctrl->ioaddr + ATA_DRIVE);
> fais comme ceci :
>   outb(ATA_D_IBM
>        | ((harddisk->device == MASTER) ? ATA_MASTER : ATA_SLAVE)
>        | head,
>        ctrl->ioaddr + ATA_DRIVE);
>
> Car je soupçonne que tu n'es pas en LBA parce que tu fais en fait :
> ... ? (ATA_MASTER) : (ATA_SLAVE|head);
>
> Or comme tu utilises le MASTER, ben 'head' n'ai jamais pris en compte, et
> donc le mode LBA non plus puisqu'il est porté par 'head'.
>
> ----- Original Message -----
> From: <thomas.petazzoni@enix.org>
> To: <sos@freebsd.dk>; <kos-dev@enix.org>
> Sent: Tuesday, February 12, 2002 12:04 PM
> Subject: [Kos-dev] ATA & LBA : new experimentations
>
>
> > Hi,
> >
> > I made some experimentations about my problem concerning the use of
> > LBA.
> >
> > First experimentation :
> > -----------------------
> > Instead of reading sector 0, and then reading sector 64, I did the
> > following :
> >  * read sector 0
> >  * identify drive (to make sure there is something else in the
> > controller buffer)
> >  * read sector 64
> >
> > But read sector 64 still returned the contents of sector 0.
> >
> > Second experimentation :
> > ------------------------
> >
> > I tested if the Error bit was set BEFORE sending the command, and it
> > was set. So I added a software reset BEFORE sending the command. I
> > don't know why exactly I need to reset the device, but it works much
> > more better now.
> >
> > Then, AFTER sending the command (for a LBA read, for any sector,
> > including sector 0), the Error bit is set, and the Error register is
> > set to 0x10, which means IDNF : Requested Sector ID Not Found.
> >
> > That's strange because I have
> >  sector = 0;
> >  cyl_lo = 0;
> >  cyl_hi = 0;
> >  drive_head = 0xA0     | 0x40 | 0      | 0
> >               SETBITS    LBA    HEAD 0   MASTER
> >
> > And it returns an error.
> >
> > Do you have any idea ?
> >
> > Note that on an other computer, without doing the reset BEFORE sending
> > the command, it perfectly works.
> >
> > Thanks a lot,
> >
> > Thomas
> >
> > (code included interesting function is still add_ide_op_polled_mode,
> > and get_partition_table to see the tests I make)
>
>
> --------------------------------------------------------------------------
--
> ----
>
>
> >
> > --
> > PETAZZONI Thomas - thomas.petazzoni@enix.org - UIN : 34937744
> > (Perso)      http://www.enix.org/~thomas/
> > (KOS)        http://kos.enix.org/
> > (Club LinUT) http://club-linut.enix.org
> >
>