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Subject[PATCH 4.20 115/117] mt76x0: antenna select corrections
Date
4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stanislaw Gruszka <sgruszka@redhat.com>

commit ef442b73b6bc36b5499e1983611abb46e6337975 upstream.

Update mt76x0_phy_ant_select() to conform vendor driver, most notably
add dual antenna mode support, read configuration from EEPROM and
move ant select out of channel config to init phase. Plus small MT7630E
quirk for MT_CMB_CTRL register which vendor driver dedicated to this
chip do.

This make MT7630E workable with mt76x0e driver and do not cause any
problems on MT7610U for me.

Acked-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/wireless/mediatek/mt76/mt76x0/phy.c | 52 +++++++++++++++-----
drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h | 10 +--
2 files changed, 44 insertions(+), 18 deletions(-)

--- a/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/phy.c
@@ -518,21 +518,47 @@ mt76x0_phy_set_chan_bbp_params(struct mt

static void mt76x0_ant_select(struct mt76x02_dev *dev)
{
- struct ieee80211_channel *chan = dev->mt76.chandef.chan;
-
- /* single antenna mode */
- if (chan->band == NL80211_BAND_2GHZ) {
- mt76_rmw(dev, MT_COEXCFG3,
- BIT(5) | BIT(4) | BIT(3) | BIT(2), BIT(1));
- mt76_rmw(dev, MT_WLAN_FUN_CTRL, BIT(5), BIT(6));
+ u16 ee_ant = mt76x02_eeprom_get(dev, MT_EE_ANTENNA);
+ u16 nic_conf2 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_2);
+ u32 wlan, coex3, cmb;
+ bool ant_div;
+
+ wlan = mt76_rr(dev, MT_WLAN_FUN_CTRL);
+ cmb = mt76_rr(dev, MT_CMB_CTRL);
+ coex3 = mt76_rr(dev, MT_COEXCFG3);
+
+ cmb &= ~(BIT(14) | BIT(12));
+ wlan &= ~(BIT(6) | BIT(5));
+ coex3 &= ~GENMASK(5, 2);
+
+ if (ee_ant & MT_EE_ANTENNA_DUAL) {
+ /* dual antenna mode */
+ ant_div = !(nic_conf2 & MT_EE_NIC_CONF_2_ANT_OPT) &&
+ (nic_conf2 & MT_EE_NIC_CONF_2_ANT_DIV);
+ if (ant_div)
+ cmb |= BIT(12);
+ else
+ coex3 |= BIT(4);
+ coex3 |= BIT(3);
+ if (dev->mt76.cap.has_2ghz)
+ wlan |= BIT(6);
} else {
- mt76_rmw(dev, MT_COEXCFG3, BIT(5) | BIT(2),
- BIT(4) | BIT(3));
- mt76_clear(dev, MT_WLAN_FUN_CTRL,
- BIT(6) | BIT(5));
+ /* sigle antenna mode */
+ if (dev->mt76.cap.has_5ghz) {
+ coex3 |= BIT(3) | BIT(4);
+ } else {
+ wlan |= BIT(6);
+ coex3 |= BIT(1);
+ }
}
- mt76_clear(dev, MT_CMB_CTRL, BIT(14) | BIT(12));
+
+ if (is_mt7630(dev))
+ cmb |= BIT(14) | BIT(11);
+
+ mt76_wr(dev, MT_WLAN_FUN_CTRL, wlan);
+ mt76_wr(dev, MT_CMB_CTRL, cmb);
mt76_clear(dev, MT_COEXCFG0, BIT(2));
+ mt76_wr(dev, MT_COEXCFG3, coex3);
}

static void
@@ -700,7 +726,6 @@ int mt76x0_phy_set_channel(struct mt76x0
mt76x02_phy_set_bw(dev, chandef->width, ch_group_index);
mt76x02_phy_set_band(dev, chandef->chan->band,
ch_group_index & 1);
- mt76x0_ant_select(dev);

mt76_rmw(dev, MT_EXT_CCA_CFG,
(MT_EXT_CCA_CFG_CCA0 |
@@ -927,6 +952,7 @@ void mt76x0_phy_init(struct mt76x02_dev
{
INIT_DELAYED_WORK(&dev->cal_work, mt76x0_phy_calibration_work);

+ mt76x0_ant_select(dev);
mt76x0_rf_init(dev);
mt76x02_phy_set_rxpath(dev);
mt76x02_phy_set_txdac(dev);
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.h
@@ -25,6 +25,7 @@ enum mt76x02_eeprom_field {
MT_EE_VERSION = 0x002,
MT_EE_MAC_ADDR = 0x004,
MT_EE_PCI_ID = 0x00A,
+ MT_EE_ANTENNA = 0x022,
MT_EE_NIC_CONF_0 = 0x034,
MT_EE_NIC_CONF_1 = 0x036,
MT_EE_COUNTRY_REGION_5GHZ = 0x038,
@@ -104,6 +105,8 @@ enum mt76x02_eeprom_field {
__MT_EE_MAX
};

+#define MT_EE_ANTENNA_DUAL BIT(15)
+
#define MT_EE_NIC_CONF_0_RX_PATH GENMASK(3, 0)
#define MT_EE_NIC_CONF_0_TX_PATH GENMASK(7, 4)
#define MT_EE_NIC_CONF_0_PA_TYPE GENMASK(9, 8)
@@ -118,12 +121,9 @@ enum mt76x02_eeprom_field {
#define MT_EE_NIC_CONF_1_LNA_EXT_5G BIT(3)
#define MT_EE_NIC_CONF_1_TX_ALC_EN BIT(13)

-#define MT_EE_NIC_CONF_2_RX_STREAM GENMASK(3, 0)
-#define MT_EE_NIC_CONF_2_TX_STREAM GENMASK(7, 4)
-#define MT_EE_NIC_CONF_2_HW_ANTDIV BIT(8)
+#define MT_EE_NIC_CONF_2_ANT_OPT BIT(3)
+#define MT_EE_NIC_CONF_2_ANT_DIV BIT(4)
#define MT_EE_NIC_CONF_2_XTAL_OPTION GENMASK(10, 9)
-#define MT_EE_NIC_CONF_2_TEMP_DISABLE BIT(11)
-#define MT_EE_NIC_CONF_2_COEX_METHOD GENMASK(15, 13)

#define MT_EFUSE_USAGE_MAP_SIZE (MT_EE_USAGE_MAP_END - \
MT_EE_USAGE_MAP_START + 1)

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