[U-Boot] [PATCH 10/19] x86: Re-enable PCAT timer 2 for beeping

[Graeme Russ]

Hi Simon,

On Thu, Apr 18, 2013 at 12:13 PM, Simon Glass <sjg at chromium.org> wrote:
>
> While we don't want PCAT timers for timing, we want timer 2 so that we can
> still make a beep. Re-purpose the PCAT driver for this, and enable it in
> coreboot.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>  arch/x86/include/asm/u-boot-x86.h |  1 +
>  arch/x86/lib/Makefile             |  2 +-
>  arch/x86/lib/pcat_timer.c         | 69
++-------------------------------------
>  arch/x86/lib/tsc_timer.c          |  6 +++-
>  include/configs/coreboot.h        |  1 +
>  5 files changed, 11 insertions(+), 68 deletions(-)

[snip]

> -/* this is not very exact */
> -void __udelay(unsigned long usec)
> -{
> -       int counter;
> -       int wraps;
> -
> -       if (timer_init_done) {
> -               counter = read_pit();
> -               wraps = usec / 1000;
> -               usec = usec % 1000;
> -
> -               usec *= 1194;
> -               usec /= 1000;
> -               usec += counter;
> -
> -               while (usec > 1194) {
> -                       usec -= 1194;
> -                       wraps++;
> -               }
> -
> -               while (1) {
> -                       int new_count = read_pit();
> -
> -                       if (((new_count < usec) && !wraps) || wraps < 0)
> -                               break;
> -
> -                       if (new_count > counter)
> -                               wraps--;
> -
> -                       counter = new_count;
> -               }
> -       }
> -
> -}

This does not seem related...

Regards,

Graeme