Re:USB questions (for the MPC8xx)

Kári Davíðsson wrote:

Hi,

In the m8xxhci.c hci driver for the mpc one can select to use TIMER1 for
the SOF generator.
A interruopt handler, m8xxhci_timer_interrupt() is registered to handle
this interrupt and generate the SOF.
Why is it then that the timer is also exported to PA6?
Why is it the the USE_TIMER1_FOR_SOF is defined within the
USE_UCODE_PATCH which is for external generated SOF-interrupt?
Isn't the timer option exactly for the case where you do not have
externally generated SOF-interrupt?
If we can use a timer for generating the SOF why can't we just use a
regular kernel timer instead, and therfore free one timer or baud rate
generator?

The microcode patch needs an external 1kHz Signal on dreq input.
Timer 1 is one option to generate that external signal.
The interrupt handler is not needed anymore so my patch should have
changed a little bit more. The timer can run without interrupt handler
it just must generate the external 1kHz Signal.

- Roman

Thanks,

K.D.

P.S. sorry for the x-post I am not shure if this belongs to the embedded
list or the usb list.

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