Devices not supporting read-6....

[Erik Andersen]

On Fri Jan 21, 2000 at 12:50:03PM -0800, H. Peter Anvin wrote:
> 
> On that general subject, right now the only way to send generic ATAPI
> commands is to have ide-scsi on that interface, and nothing else.
> This makes it extremely hard to use.
> 
> Either we should *always* send IDE commands through the SCSI subsystem
> (effectively treating IDE as a form of SCSI; I believe NT does this)
> or I'd like to see a way to issue generic ATAPI commands --
> preferrably via a "generic ATAPI device" analogous to what SCSI has
> (and parport IDE, I belive) -- i.e. /dev/hg0 et al -- or via an
> ioctl().
> 
> There probably also should be an ioctl() for the cooked SCSI and IDE
> devices to find the equivalent generic device.
> 
> 	-hpa

I invite you to read drivers/cdrom.c and include/linux/cdrom.h.  The
CDROM_SEND_PACKET ioctl has been added to the interface during the 2.3.x
series, and allows you to send arbitrary packets to a low-level cdrom 
driver that supports CDC_GENERIC_PACKET (i.e. ide and scsi).

/me thinks the uniform cdrom driver is very cool, but then I'm biased.

 -Erik

--
Erik B. Andersen   Web:    http://www.xmission.com/~andersen/ 
                   email:  andersee en debian.org
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