Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753141Ab3F1Szl (ORCPT ); Fri, 28 Jun 2013 14:55:41 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:41742 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752633Ab3F1Szg (ORCPT ); Fri, 28 Jun 2013 14:55:36 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Stanislaw Gruszka , "John W. Linville" , Kamal Mostafa Subject: [PATCH 099/105] rt2800: fix RT5390 & RT3290 TX power settings regression Date: Fri, 28 Jun 2013 11:52:01 -0700 Message-Id: <1372445527-24414-100-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1372445527-24414-1-git-send-email-kamal@canonical.com> References: <1372445527-24414-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2815 Lines: 82 3.8.13.4 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Stanislaw Gruszka commit 8c8d2017ba25c510ddf093419048460db1109bc4 upstream. 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 Signed-off-by: Stanislaw Gruszka Acked-by: Gertjan van Wingerde Signed-off-by: John W. Linville Signed-off-by: Kamal Mostafa --- 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 0b55706..e9a440f 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -2635,19 +2635,26 @@ 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) { -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/