mwl8k: pass GET_HW_SPEC capability bitmask up the stack

This enables HT association and AMPDU in the receive direction for
STA firmware images on hardware that supports it.
Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwl8k.c

@@ -1578,6 +1578,68 @@ struct mwl8k_cmd_get_hw_spec_sta {
 	__le32 total_rxd;
 } __attribute__((packed));
 
+#define MWL8K_CAP_MAX_AMSDU		0x20000000
+#define MWL8K_CAP_GREENFIELD		0x08000000
+#define MWL8K_CAP_AMPDU			0x04000000
+#define MWL8K_CAP_RX_STBC		0x01000000
+#define MWL8K_CAP_TX_STBC		0x00800000
+#define MWL8K_CAP_SHORTGI_40MHZ		0x00400000
+#define MWL8K_CAP_SHORTGI_20MHZ		0x00200000
+#define MWL8K_CAP_RX_ANTENNA_MASK	0x000e0000
+#define MWL8K_CAP_TX_ANTENNA_MASK	0x0001c000
+#define MWL8K_CAP_DELAY_BA		0x00003000
+#define MWL8K_CAP_MIMO			0x00000200
+#define MWL8K_CAP_40MHZ			0x00000100
+
+static void mwl8k_set_ht_caps(struct ieee80211_hw *hw, u32 cap)
+{
+	struct mwl8k_priv *priv = hw->priv;
+	int rx_streams;
+	int tx_streams;
+
+	priv->band.ht_cap.ht_supported = 1;
+
+	if (cap & MWL8K_CAP_MAX_AMSDU)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
+	if (cap & MWL8K_CAP_GREENFIELD)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
+	if (cap & MWL8K_CAP_AMPDU) {
+		hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
+		priv->band.ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
+		priv->band.ht_cap.ampdu_density =
+				IEEE80211_HT_MPDU_DENSITY_NONE;
+	}
+	if (cap & MWL8K_CAP_RX_STBC)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
+	if (cap & MWL8K_CAP_TX_STBC)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
+	if (cap & MWL8K_CAP_SHORTGI_40MHZ)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
+	if (cap & MWL8K_CAP_SHORTGI_20MHZ)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
+	if (cap & MWL8K_CAP_DELAY_BA)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
+	if (cap & MWL8K_CAP_40MHZ)
+		priv->band.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+
+	rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
+	tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
+
+	priv->band.ht_cap.mcs.rx_mask[0] = 0xff;
+	if (rx_streams >= 2)
+		priv->band.ht_cap.mcs.rx_mask[1] = 0xff;
+	if (rx_streams >= 3)
+		priv->band.ht_cap.mcs.rx_mask[2] = 0xff;
+	priv->band.ht_cap.mcs.rx_mask[4] = 0x01;
+	priv->band.ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
+
+	if (rx_streams != tx_streams) {
+		priv->band.ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
+		priv->band.ht_cap.mcs.tx_params |= (tx_streams - 1) <<
+				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
+	}
+}
+
 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
 {
 	struct mwl8k_priv *priv = hw->priv;
@@ -1608,6 +1670,8 @@ static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
 		priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
 		priv->fw_rev = le32_to_cpu(cmd->fw_rev);
 		priv->hw_rev = cmd->hw_rev;
+		if (cmd->caps & cpu_to_le32(MWL8K_CAP_MIMO))
+			mwl8k_set_ht_caps(hw, le32_to_cpu(cmd->caps));
 	}
 
 	kfree(cmd);