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authormatthieu castet2008-03-19 19:40:52 +0100
committerGreg Kroah-Hartman2008-04-24 21:16:42 -0700
commitd277064e7e16d02e0078a6bc1820764ae00dea87 (patch)
tree18f78d06f8bc3d5a57a04ac46d4f75ca5757faad /drivers/usb/storage/scsiglue.c
parentdda43a0e03a33dd716fb34f812b1af614f74daff (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/scsiglue.c')
-rw-r--r--drivers/usb/storage/scsiglue.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 8c1e2954f3b9..5405ba8cd9d2 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -132,7 +132,7 @@ static int slave_configure(struct scsi_device *sdev)
/* Disk-type devices use MODE SENSE(6) if the protocol
* (SubClass) is Transparent SCSI, otherwise they use
* MODE SENSE(10). */
- if (us->subclass != US_SC_SCSI)
+ if (us->subclass != US_SC_SCSI && us->subclass != US_SC_CYP_ATACB)
sdev->use_10_for_ms = 1;
/* Many disks only accept MODE SENSE transfer lengths of