From: Stanislaw Gruszka Date: Tue, 11 Jun 2013 16:48:53 +0000 (+0200) Subject: rt2800: fix RT5390 & RT3290 TX power settings regression X-Git-Tag: upstream/snapshot3+hdmi~4870^2~34^2~7 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8c8d2017ba25c510ddf093419048460db1109bc4;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git rt2800: fix RT5390 & RT3290 TX power settings regression My change: commit cee2c7315f60beeff6137ee59e99acc77d636eeb Author: Stanislaw Gruszka 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 Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka Acked-by: Gertjan van Wingerde Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index b52d70c..72f32e5 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -3027,19 +3027,26 @@ 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) {