diff options
Diffstat (limited to 'package')
| -rw-r--r-- | package/kernel/ath10k-ct/patches/205-ath10k-adjust-tx-power-reduction-for-US-regulatory-d.patch | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/package/kernel/ath10k-ct/patches/205-ath10k-adjust-tx-power-reduction-for-US-regulatory-d.patch b/package/kernel/ath10k-ct/patches/205-ath10k-adjust-tx-power-reduction-for-US-regulatory-d.patch new file mode 100644 index 0000000000..ff8631e207 --- /dev/null +++ b/package/kernel/ath10k-ct/patches/205-ath10k-adjust-tx-power-reduction-for-US-regulatory-d.patch @@ -0,0 +1,101 @@ +From: Sven Eckelmann <seckelmann@datto.com> +Date: Wed, 28 Nov 2018 16:16:27 +0100 +Subject: ath10k: adjust tx power reduction for US regulatory domain + +FCC allows maximum antenna gain of 6 dBi. 15.247(b)(4): + +> (4) The conducted output power limit +> specified in paragraph (b) of this section +> is based on the use of antennas +> with directional gains that do not exceed +> 6 dBi. Except as shown in paragraph +> (c) of this section, if transmitting +> antennas of directional gain greater +> than 6 dBi are used, the conducted +> output power from the intentional radiator +> shall be reduced below the stated +> values in paragraphs (b)(1), (b)(2), +> and (b)(3) of this section, as appropriate, +> by the amount in dB that the +> directional gain of the antenna exceeds +> 6 dBi. + +https://www.gpo.gov/fdsys/pkg/CFR-2013-title47-vol1/pdf/CFR-2013-title47-vol1-sec15-247.pdf + +Signed-off-by: Sven Eckelmann <seckelmann@datto.com> + +Forwarded: no + +--- a/ath10k-4.19/mac.c ++++ b/ath10k-4.19/mac.c +@@ -1153,6 +1153,40 @@ static inline int ath10k_vdev_setup_sync + return ar->last_wmi_vdev_start_status; + } + ++static u32 ath10k_get_max_antenna_gain(struct ath10k *ar, ++ u32 ch_max_antenna_gain) ++{ ++ u32 max_antenna_gain; ++ ++ if (ar->dfs_detector && ar->dfs_detector->region == NL80211_DFS_FCC) { ++ /* FCC allows maximum antenna gain of 6 dBi. 15.247(b)(4): ++ * ++ * > (4) The conducted output power limit ++ * > specified in paragraph (b) of this section ++ * > is based on the use of antennas ++ * > with directional gains that do not exceed ++ * > 6 dBi. Except as shown in paragraph ++ * > (c) of this section, if transmitting ++ * > antennas of directional gain greater ++ * > than 6 dBi are used, the conducted ++ * > output power from the intentional radiator ++ * > shall be reduced below the stated ++ * > values in paragraphs (b)(1), (b)(2), ++ * > and (b)(3) of this section, as appropriate, ++ * > by the amount in dB that the ++ * > directional gain of the antenna exceeds ++ * > 6 dBi. ++ * ++ * https://www.gpo.gov/fdsys/pkg/CFR-2013-title47-vol1/pdf/CFR-2013-title47-vol1-sec15-247.pdf ++ */ ++ max_antenna_gain = 6; ++ } else { ++ max_antenna_gain = 0; ++ } ++ ++ return max(ch_max_antenna_gain, max_antenna_gain); ++} ++ + static int ath10k_monitor_vdev_start(struct ath10k *ar, int vdev_id) + { + struct cfg80211_chan_def *chandef = NULL; +@@ -1185,7 +1219,8 @@ static int ath10k_monitor_vdev_start(str + arg.channel.min_power = 0; + arg.channel.max_power = channel->max_power * 2; + arg.channel.max_reg_power = channel->max_reg_power * 2; +- arg.channel.max_antenna_gain = channel->max_antenna_gain; ++ arg.channel.max_antenna_gain = ath10k_get_max_antenna_gain(ar, ++ channel->max_antenna_gain); + + reinit_completion(&ar->vdev_setup_done); + +@@ -1627,7 +1662,8 @@ static int ath10k_vdev_start_restart(str + arg.channel.min_power = 0; + arg.channel.max_power = chandef->chan->max_power * 2; + arg.channel.max_reg_power = chandef->chan->max_reg_power * 2; +- arg.channel.max_antenna_gain = chandef->chan->max_antenna_gain; ++ arg.channel.max_antenna_gain = ath10k_get_max_antenna_gain(ar, ++ chandef->chan->max_antenna_gain); + + /* CT Firmware can support 32+ VDEVS, but can only support + * beacon-ing devs with dev ids 0 - 31 due to firmware limitations. +@@ -3799,7 +3835,8 @@ static int ath10k_update_channel_list(st + ch->min_power = 0; + ch->max_power = channel->max_power * 2; + ch->max_reg_power = channel->max_reg_power * 2; +- ch->max_antenna_gain = channel->max_antenna_gain; ++ ch->max_antenna_gain = ath10k_get_max_antenna_gain(ar, ++ channel->max_antenna_gain); + ch->reg_class_id = 0; /* FIXME */ + + /* FIXME: why use only legacy modes, why not any |