Sent from my iPad
On 11 jun. 2013, at 18:48, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote:
> My change:
>
> commit cee2c7315f60beeff6137ee59e99acc77d636eeb
> Author: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
> Date: Fri Oct 5 13:44:09 2012 +0200
>
> rt2800: use BBP_R1 for setting tx power
>
> unfortunately does not work well with RT5390 and RT3290 chips as they
> require different temperature compensation TX power settings (TSSI
> tuning). Since that commit make wireless connection very unstable on
> those chips, restore previous behavior to fix regression. Once we
> implement proper TSSI tuning on 5390/3290 we can restore back setting
> TX power by BBP_R1 register for those chips.
>
> Reported-and-tested-by: Mike Romberg <mike-romberg@xxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Acked-by: Gertjan van Wingerde <gwingerde@xxxxxxxxx>
> ---
> drivers/net/wireless/rt2x00/rt2800lib.c | 29 ++++++++++++++++++-----------
> 1 file changed, 18 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
> index 92849e5..8b679df 100644
> --- a/drivers/net/wireless/rt2x00/rt2800lib.c
> +++ b/drivers/net/wireless/rt2x00/rt2800lib.c
> @@ -2634,19 +2634,26 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev,
> * TODO: we do not use +6 dBm option to do not increase power beyond
> * regulatory limit, however this could be utilized for devices with
> * CAPABILITY_POWER_LIMIT.
> + *
> + * TODO: add different temperature compensation code for RT3290 & RT5390
> + * to allow to use BBP_R1 for those chips.
> */
> - rt2800_bbp_read(rt2x00dev, 1, &r1);
> - if (delta <= -12) {
> - power_ctrl = 2;
> - delta += 12;
> - } else if (delta <= -6) {
> - power_ctrl = 1;
> - delta += 6;
> - } else {
> - power_ctrl = 0;
> + if (!rt2x00_rt(rt2x00dev, RT3290) &&
> + !rt2x00_rt(rt2x00dev, RT5390)) {
> + rt2800_bbp_read(rt2x00dev, 1, &r1);
> + if (delta <= -12) {
> + power_ctrl = 2;
> + delta += 12;
> + } else if (delta <= -6) {
> + power_ctrl = 1;
> + delta += 6;
> + } else {
> + power_ctrl = 0;
> + }
> + rt2x00_set_field8(&r1, BBP1_TX_POWER_CTRL, power_ctrl);
> + rt2800_bbp_write(rt2x00dev, 1, r1);
> }
> - rt2x00_set_field8(&r1, BBP1_TX_POWER_CTRL, power_ctrl);
> - rt2800_bbp_write(rt2x00dev, 1, r1);
> +
> offset = TX_PWR_CFG_0;
>
> for (i = 0; i < EEPROM_TXPOWER_BYRATE_SIZE; i += 2) {
> --
> 1.7.11.7
>
> --
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