FROMLIST: wifi: ath12k: add channel 177 to the 5 GHz channel list

Add support for 5 GHz channel 177 with a center frequency of 5885 MHz and
Operating Class 125 per IEEE Std 802.11-2024 Table E-4.

Channels 169, 173, and 177 are in the 5.9 GHz band and must be disabled
when 5.9 GHz service bit is not supported. The 5.9 GHz band is only permitted
for WLAN operation under FCC regulations.

CRs-Fixed: 4435878
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3
Link: https://lore.kernel.org/all/20260415063857.2462256-1-yintang@qti.qualcomm.com
Signed-off-by: Yingying Tang <yingying.tang@oss.qualcomm.com>

Author: MilanoPipo

drivers/net/wireless/ath/ath12k/core.h

@@ -540,8 +540,8 @@ struct ath12k_sta {
 #define ATH12K_MAX_5GHZ_FREQ	(ATH12K_5GHZ_MAX_CENTER + ATH12K_HALF_20MHZ_BW)
 #define ATH12K_MIN_6GHZ_FREQ	(ATH12K_6GHZ_MIN_CENTER - ATH12K_HALF_20MHZ_BW)
 #define ATH12K_MAX_6GHZ_FREQ	(ATH12K_6GHZ_MAX_CENTER + ATH12K_HALF_20MHZ_BW)
-#define ATH12K_NUM_CHANS 101
-#define ATH12K_MAX_5GHZ_CHAN 173
+#define ATH12K_NUM_CHANS 102
+#define ATH12K_MAX_5GHZ_CHAN 177
 
 static inline bool ath12k_is_2ghz_channel_freq(u32 freq)
 {

drivers/net/wireless/ath/ath12k/dp_rx.c

@@ -17,6 +17,11 @@
 #include "dp_mon.h"
 #include "debugfs_htt_stats.h"
 
+#define ATH12K_2GHZ_MIN_CHAN_NUM 1
+#define ATH12K_2GHZ_MAX_CHAN_NUM 14
+#define ATH12K_5GHZ_MIN_CHAN_NUM 36
+#define ATH12K_5GHZ_MAX_CHAN_NUM 177
+
 static int ath12k_dp_rx_tid_delete_handler(struct ath12k_base *ab,
 					   struct ath12k_dp_rx_tid_rxq *rx_tid);
 
@@ -1288,9 +1293,11 @@ void ath12k_dp_rx_h_ppdu(struct ath12k_pdev_dp *dp_pdev,
 	    center_freq <= ATH12K_MAX_6GHZ_FREQ) {
 		rx_status->band = NL80211_BAND_6GHZ;
 		rx_status->freq = center_freq;
-	} else if (channel_num >= 1 && channel_num <= 14) {
+	} else if (channel_num >= ATH12K_2GHZ_MIN_CHAN_NUM &&
+		   channel_num <= ATH12K_2GHZ_MAX_CHAN_NUM) {
 		rx_status->band = NL80211_BAND_2GHZ;
-	} else if (channel_num >= 36 && channel_num <= 173) {
+	} else if (channel_num >= ATH12K_5GHZ_MIN_CHAN_NUM &&
+		   channel_num <= ATH12K_5GHZ_MAX_CHAN_NUM) {
 		rx_status->band = NL80211_BAND_5GHZ;
 	}
 

drivers/net/wireless/ath/ath12k/mac.c

@@ -51,6 +51,9 @@
 	.max_power              = 30, \
 }
 
+#define ATH12K_5_9_GHZ_MIN_FREQ 5845
+#define ATH12K_5_9_GHZ_MAX_FREQ 5885
+
 static const struct ieee80211_channel ath12k_2ghz_channels[] = {
 	CHAN2G(1, 2412, 0),
 	CHAN2G(2, 2417, 0),
@@ -96,6 +99,7 @@ static const struct ieee80211_channel ath12k_5ghz_channels[] = {
 	CHAN5G(165, 5825, 0),
 	CHAN5G(169, 5845, 0),
 	CHAN5G(173, 5865, 0),
+	CHAN5G(177, 5885, 0),
 };
 
 static const struct ieee80211_channel ath12k_6ghz_channels[] = {
@@ -13880,6 +13884,26 @@ static int ath12k_mac_update_band(struct ath12k *ar,
 	return 0;
 }
 
+static void ath12k_mac_update_5_9_ghz_ch_list(struct ath12k *ar,
+					      struct ieee80211_supported_band *band)
+{
+	int i;
+
+	if (test_bit(WMI_TLV_SERVICE_5_9GHZ_SUPPORT,
+		     ar->ab->wmi_ab.svc_map))
+		return;
+
+	guard(spinlock_bh)(&ar->ab->base_lock);
+	if (ar->ab->dfs_region != ATH12K_DFS_REG_FCC)
+		return;
+
+	for (i = 0; i < band->n_channels; i++) {
+		if (band->channels[i].center_freq >= ATH12K_5_9_GHZ_MIN_FREQ &&
+		    band->channels[i].center_freq <= ATH12K_5_9_GHZ_MAX_FREQ)
+			band->channels[i].flags |= IEEE80211_CHAN_DISABLED;
+	}
+}
+
 static int ath12k_mac_setup_channels_rates(struct ath12k *ar,
 					   u32 supported_bands,
 					   struct ieee80211_supported_band *bands[])
@@ -14013,6 +14037,8 @@ static int ath12k_mac_setup_channels_rates(struct ath12k *ar,
 			band->n_bitrates = ath12k_a_rates_size;
 			band->bitrates = ath12k_a_rates;
 
+			ath12k_mac_update_5_9_ghz_ch_list(ar, band);
+
 			if (ab->hw_params->single_pdev_only) {
 				phy_id = ath12k_get_phy_id(ar, WMI_HOST_WLAN_5GHZ_CAP);
 				reg_cap = &ab->hal_reg_cap[phy_id];

drivers/net/wireless/ath/ath12k/wmi.h

@@ -2259,6 +2259,7 @@ enum wmi_tlv_service {
 	WMI_TLV_SERVICE_FREQINFO_IN_METADATA = 219,
 	WMI_TLV_SERVICE_EXT2_MSG = 220,
 	WMI_TLV_SERVICE_BEACON_PROTECTION_SUPPORT = 244,
+	WMI_TLV_SERVICE_5_9GHZ_SUPPORT = 247,
 	WMI_TLV_SERVICE_SRG_SRP_SPATIAL_REUSE_SUPPORT = 249,
 	WMI_TLV_SERVICE_MBSS_PARAM_IN_VDEV_START_SUPPORT = 253,