How about configure the USB vendor/product IDs as 0x1d50, 0x511e
respectively for gta03?
We don't actually need to change this. The protocol and most of the
functionality stays the same. Also, GTA01 and GTA02 share the same
product IDs, and GTA03 will be very similar to GTA02.
I must protest! The GTA01 and GTA02 (and GTA03) are different
products, it makes no sense for them to have all the same product ID's.
What if I'm writing a gadget_audio driver (I am) which needs to
identify what hardware its running with and only allocate resources
for the specific hardware? In particular, the GTA01 has less
processing power than the GTA02 - this conflation of Product ID's
means that I can't write a host driver (on the PC side) which knows
which product its talking to and allocates/advertises resources
accordingly. GTA01 doesn't have the same amount of power as GTA02,
and thus, in the case of a gadget_audio driver, I might need to only
support 2 channel operation as opposed to 4 channel operation.
Please, just consider this carefully is all I'm asking - I know there
is a tendency to 'do the simple', but if you don't consider all full
cases all the way through, you might miss something important that
makes it very difficult to address properly further down the line
(like, when a few million people are using the machine instead of just
a few thousand ..)
Vendor/product IDs are often (incorrectly) used to identify specific
functions, so if we don't change the numbers, this means that all the
people who are blessed with systems that need vendor/product IDs to
be explicitly declared before they can use them on generic devices,
can just use the GTA02 setup.
Product ID's are supposed to be used to identify different products;
and different products have different functionality. For sure, we
need to consider this.
There is the further complication that the IDs are also hard-coded on
the kernel side. This will already be a major problem when merging
our code upstream, and adding even more variants would just make it
worse.
This is a problem to solve.
;
--
Jay Vaughan
