diff options
author | matthieu castet <castet.matthieu@free.fr> | 2008-03-19 19:40:52 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-04-24 21:16:42 -0700 |
commit | d277064e7e16d02e0078a6bc1820764ae00dea87 (patch) | |
tree | 18f78d06f8bc3d5a57a04ac46d4f75ca5757faad /drivers/usb/storage/cypress_atacb.h | |
parent | dda43a0e03a33dd716fb34f812b1af614f74daff (diff) |
USB: mass storage: emulation of sat scsi_pass_thru with ATACB
I have got a cypress usb-ide bridge and I would like to tune or monitor
my disk with tools like hdparm, hddtemp or smartctl.
My controller support a way to send raw ATA command to the disk with
something call atacb (see
http://download.cypress.com.edgesuite.net/design_resources/datasheets/contents/cy7c68300c_8.pdf).
Atacb support can be added for each application, but there is some disadvantages :
- all application need to be patched
- A race is possible if there other accesses, because the emulation can
be split in 2 atacb scsi transactions. One for sending the command, one
for reading the register (if ck_cond is set).
I have implemented the emulation in usb-storage with a special proto_handler,
and an unsual entry.
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/storage/cypress_atacb.h')
-rw-r--r-- | drivers/usb/storage/cypress_atacb.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/usb/storage/cypress_atacb.h b/drivers/usb/storage/cypress_atacb.h new file mode 100644 index 00000000000..fbada898d56 --- /dev/null +++ b/drivers/usb/storage/cypress_atacb.h @@ -0,0 +1,25 @@ +/* + * Support for emulating SAT (ata pass through) on devices based + * on the Cypress USB/ATA bridge supporting ATACB. + * + * Copyright (c) 2008 Matthieu Castet (castet.matthieu@free.fr) + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2, or (at your option) any + * later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#ifndef _CYPRESS_ATACB_H_ +#define _CYPRESS_ATACB_H_ +extern void cypress_atacb_passthrough(struct scsi_cmnd*, struct us_data*); +#endif |