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Fix IDE DIAGNOSE for packet devices (Vincent Sanders)

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The DIAGNOSE command in the qemu IDE implementation has an error when
use dfor packet devices. 

The status register value is dependant on the drive being a packet
device or not, this patch corrects the returned status.

From the ATA/PI specification (V6 draft):

"If the device implements the PACKET command feature set, the device
SHALL clear bits 6,5,4,3,2 and 0 in the Status register to zero."

A selection of physical devices have been checked and do conform to
the specifications behaviour.

Signed-off-by: Vincent Sanders <vince@simtec.co.uk>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5452 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-10-09 14:19:34 +00:00
parent 9e472e101f
commit 33256a25b3
1 changed files with 9 additions and 2 deletions
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9
hw/ide.c
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@ -2308,8 +2308,15 @@ static void ide_ioport_write(void *opaque, uint32_t addr, uint32_t val)
break;
case WIN_DIAGNOSE:
ide_set_signature(s);
if (s->is_cdrom)
s->status = 0; /* ATAPI spec (v6) section 9.10 defines packet
* devices to return a clear status register
* with READY_STAT *not* set. */
else
s->status = READY_STAT | SEEK_STAT;
s->error = 0x01;
s->error = 0x01; /* Device 0 passed, Device 1 passed or not
* present.
*/
ide_set_irq(s);
break;
case WIN_SRST: