Re: [RFC] b43: LP-PHY: Initialize SW TX power control

[Larry Finger <Larry.Finger@lwfinger.net>]

Gábor Stefanik wrote:
> I'm not sure at all if writing to offset 0 in the TX gain table
> is the right thing to do... please clarify.
> 
> Not-yet-signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
> 
> ---
> If this is indeed the right thing to do, please inform me,
> and I will resubmit this as a formal patch.
> 
> phy_lp.c |   16 ++++++++++++----
> 1 file changed, 12 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/wireless/b43/phy_lp.c
> b/drivers/net/wireless/b43/phy_lp.c
> index 689c932..93451c9 100644
> --- a/drivers/net/wireless/b43/phy_lp.c
> +++ b/drivers/net/wireless/b43/phy_lp.c
> @@ -847,15 +847,23 @@ static void lpphy_calibration(struct b43_wldev *dev)
> /* Initialize TX power control */
> static void lpphy_tx_pctl_init(struct b43_wldev *dev)
> {
> +    lpphy_tx_gain_table_entry txgain;
>     if (0/*FIXME HWPCTL capable */) {
>         //TODO
>     } else { /* This device is only software TX power control capable. */
> +        txgain.bb_mult = 0x96;
>         if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ) {
> -            //TODO
> +            txgain.gm = 4;
> +            txgain.pad = 12;
> +            txgain.pga = 12;
> +            txgain.dac = 0;
>         } else {
> -            //TODO
> -        }
> -        //TODO set BB multiplier to 0x0096
> +            txgain.gm = 7;
> +            txgain.pad = 15;
> +            txgain.pga = 14;

I found a typo in the specs today. The pad should be 14 and pga should
be 15.

> +            txgain.dac = 0;
> +        } // FIXME offset 0 is just a guess!
> +        lpphy_write_gain_table(dev, 0, txgain);

The link was wrong in the page. The correct routine is
http://bcm-v4.sipsolutions.net/802.11/PHY/LP/SetTXGain. It has one
argument &txgain. I don't think this one has been written yet.

Larry