Commit 09382d8f authored by Ming Yen Hsieh's avatar Ming Yen Hsieh Committed by Felix Fietkau
Browse files

wifi: mt76: mt7921: update the channel usage when the regd domain changed 



The 5.9/6GHz channel license of a certain platform device has been
regulated in various countries. That may be difference with standard
Liunx regulatory domain settings. In this case, when .reg_notifier()
called for regulatory change, mt792x chipset should update the channel
usage based on clc or dts configurations.

Channel would be disabled by following cases.
* clc report the particular UNII-x is disabled.
* dts enabled and the channel is not configured.

Signed-off-by: default avatarMing Yen Hsieh <mingyen.hsieh@mediatek.com>
Co-developed-by: default avatarDeren Wu <deren.wu@mediatek.com>
Signed-off-by: default avatarDeren Wu <deren.wu@mediatek.com>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 4fc8df50

drivers/net/wireless/mediatek/mt76/eeprom.c

+5 −2
Original line number Diff line number Diff line
@@ -188,7 +188,7 @@ static bool mt76_string_prop_find(struct property *prop, const char *str) 
	return false;

}



static struct device_node *

struct device_node *

mt76_find_power_limits_node(struct mt76_dev *dev)

{

	struct device_node *np = dev->dev->of_node;
@@ -227,6 +227,7 @@ mt76_find_power_limits_node(struct mt76_dev *dev) 
	of_node_put(np);

	return fallback;

}

EXPORT_SYMBOL_GPL(mt76_find_power_limits_node);



static const __be32 *

mt76_get_of_array(struct device_node *np, char *name, size_t *len, int min)
@@ -241,7 +242,7 @@ mt76_get_of_array(struct device_node *np, char *name, size_t *len, int min) 
	return prop->value;

}



static struct device_node *

struct device_node *

mt76_find_channel_node(struct device_node *np, struct ieee80211_channel *chan)

{

	struct device_node *cur;
@@ -265,6 +266,8 @@ mt76_find_channel_node(struct device_node *np, struct ieee80211_channel *chan) 


	return NULL;

}

EXPORT_SYMBOL_GPL(mt76_find_channel_node);





static s8

mt76_get_txs_delta(struct device_node *np, u8 nss)

drivers/net/wireless/mediatek/mt76/mt76.h

+5 −0
Original line number Diff line number Diff line
@@ -1537,6 +1537,11 @@ mt76_mcu_skb_send_msg(struct mt76_dev *dev, struct sk_buff *skb, int cmd, 


void mt76_set_irq_mask(struct mt76_dev *dev, u32 addr, u32 clear, u32 set);



struct device_node *

mt76_find_power_limits_node(struct mt76_dev *dev);

struct device_node *

mt76_find_channel_node(struct device_node *np, struct ieee80211_channel *chan);



s8 mt76_get_rate_power_limits(struct mt76_phy *phy,

			      struct ieee80211_channel *chan,

			      struct mt76_power_limits *dest,

drivers/net/wireless/mediatek/mt76/mt7921/init.c

+51 −0
Original line number Diff line number Diff line
@@ -58,6 +58,55 @@ static int mt7921_thermal_init(struct mt792x_phy *phy) 
	return PTR_ERR_OR_ZERO(hwmon);

}



static void

mt7921_regd_channel_update(struct wiphy *wiphy, struct mt792x_dev *dev)

{

#define IS_UNII_INVALID(idx, sfreq, efreq) \

	(!(dev->phy.clc_chan_conf & BIT(idx)) && (cfreq) >= (sfreq) && (cfreq) <= (efreq))

	struct ieee80211_supported_band *sband;

	struct mt76_dev *mdev = &dev->mt76;

	struct device_node *np, *band_np;

	struct ieee80211_channel *ch;

	int i, cfreq;



	np = mt76_find_power_limits_node(mdev);



	sband = wiphy->bands[NL80211_BAND_5GHZ];

	band_np = np ? of_get_child_by_name(np, "txpower-5g") : NULL;

	for (i = 0; i < sband->n_channels; i++) {

		ch = &sband->channels[i];

		cfreq = ch->center_freq;



		if (np && (!band_np || !mt76_find_channel_node(band_np, ch))) {

			ch->flags |= IEEE80211_CHAN_DISABLED;

			continue;

		}



		/* UNII-4 */

		if (IS_UNII_INVALID(0, 5850, 5925))

			ch->flags |= IEEE80211_CHAN_DISABLED;

	}



	sband = wiphy->bands[NL80211_BAND_6GHZ];

	band_np = np ? of_get_child_by_name(np, "txpower-6g") : NULL;

	for (i = 0; i < sband->n_channels; i++) {

		ch = &sband->channels[i];

		cfreq = ch->center_freq;



		if (np && (!band_np || !mt76_find_channel_node(band_np, ch))) {

			ch->flags |= IEEE80211_CHAN_DISABLED;

			continue;

		}



		/* UNII-5/6/7/8 */

		if (IS_UNII_INVALID(1, 5925, 6425) ||

		    IS_UNII_INVALID(2, 6425, 6525) ||

		    IS_UNII_INVALID(3, 6525, 6875) ||

		    IS_UNII_INVALID(4, 6875, 7125))

			ch->flags |= IEEE80211_CHAN_DISABLED;

	}

}



static void

mt7921_regd_notifier(struct wiphy *wiphy,

		     struct regulatory_request *request)
@@ -74,6 +123,8 @@ mt7921_regd_notifier(struct wiphy *wiphy, 
	mt76_connac_mcu_set_channel_domain(hw->priv);

	mt7921_set_tx_sar_pwr(hw, NULL);

	mt792x_mutex_release(dev);



	mt7921_regd_channel_update(wiphy, dev);

}



int mt7921_mac_init(struct mt792x_dev *dev)

drivers/net/wireless/mediatek/mt76/mt7921/mcu.c

+3 −0
Original line number Diff line number Diff line
@@ -1247,6 +1247,7 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2, 
			 u8 idx)

{

#define CLC_CAP_EVT_EN BIT(0)

#define CLC_CAP_DTS_EN BIT(1)

	struct sk_buff *skb, *ret_skb = NULL;

	struct {

		u8 ver;
@@ -1274,6 +1275,8 @@ int __mt7921_mcu_set_clc(struct mt792x_dev *dev, u8 *alpha2, 


	if (dev->phy.chip_cap & MT792x_CHIP_CAP_CLC_EVT_EN)

		req.cap |= CLC_CAP_EVT_EN;

	if (mt76_find_power_limits_node(&dev->mt76))

		req.cap |= CLC_CAP_DTS_EN;



	pos = clc->data;

	for (i = 0; i < clc->nr_country; i++) {