iwlwifi: add commit_rxon lib

Patch adds commit_rxon lib operation to iwlwifi and iwl3945 drivers.

Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 145 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c
index 519e8922d9f..9a0fb80023a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945.c
@@ -2008,6 +2008,150 @@ static int iwl3945_send_rxon_assoc(struct iwl_priv *priv)
 	return rc;
 }
 
+/**
+ * iwl3945_commit_rxon - commit staging_rxon to hardware
+ *
+ * The RXON command in staging_rxon is committed to the hardware and
+ * the active_rxon structure is updated with the new data.  This
+ * function correctly transitions out of the RXON_ASSOC_MSK state if
+ * a HW tune is required based on the RXON structure changes.
+ */
+static int iwl3945_commit_rxon(struct iwl_priv *priv)
+{
+	/* cast away the const for active_rxon in this function */
+	struct iwl3945_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
+	struct iwl3945_rxon_cmd *staging_rxon = (void *)&priv->staging_rxon;
+	int rc = 0;
+	bool new_assoc =
+		!!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
+
+	if (!iwl_is_alive(priv))
+		return -1;
+
+	/* always get timestamp with Rx frame */
+	staging_rxon->flags |= RXON_FLG_TSF2HOST_MSK;
+
+	/* select antenna */
+	staging_rxon->flags &=
+	    ~(RXON_FLG_DIS_DIV_MSK | RXON_FLG_ANT_SEL_MSK);
+	staging_rxon->flags |= iwl3945_get_antenna_flags(priv);
+
+	rc = iwl_check_rxon_cmd(priv);
+	if (rc) {
+		IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
+		return -EINVAL;
+	}
+
+	/* If we don't need to send a full RXON, we can use
+	 * iwl3945_rxon_assoc_cmd which is used to reconfigure filter
+	 * and other flags for the current radio configuration. */
+	if (!iwl_full_rxon_required(priv)) {
+		rc = iwl_send_rxon_assoc(priv);
+		if (rc) {
+			IWL_ERR(priv, "Error setting RXON_ASSOC "
+				  "configuration (%d).\n", rc);
+			return rc;
+		}
+
+		memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
+
+		return 0;
+	}
+
+	/* If we are currently associated and the new config requires
+	 * an RXON_ASSOC and the new config wants the associated mask enabled,
+	 * we must clear the associated from the active configuration
+	 * before we apply the new config */
+	if (iwl_is_associated(priv) && new_assoc) {
+		IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
+		active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
+
+		/*
+		 * reserved4 and 5 could have been filled by the iwlcore code.
+		 * Let's clear them before pushing to the 3945.
+		 */
+		active_rxon->reserved4 = 0;
+		active_rxon->reserved5 = 0;
+		rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
+				      sizeof(struct iwl3945_rxon_cmd),
+				      &priv->active_rxon);
+
+		/* If the mask clearing failed then we set
+		 * active_rxon back to what it was previously */
+		if (rc) {
+			active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
+			IWL_ERR(priv, "Error clearing ASSOC_MSK on current "
+				  "configuration (%d).\n", rc);
+			return rc;
+		}
+	}
+
+	IWL_DEBUG_INFO(priv, "Sending RXON\n"
+		       "* with%s RXON_FILTER_ASSOC_MSK\n"
+		       "* channel = %d\n"
+		       "* bssid = %pM\n",
+		       (new_assoc ? "" : "out"),
+		       le16_to_cpu(staging_rxon->channel),
+		       staging_rxon->bssid_addr);
+
+	/*
+	 * reserved4 and 5 could have been filled by the iwlcore code.
+	 * Let's clear them before pushing to the 3945.
+	 */
+	staging_rxon->reserved4 = 0;
+	staging_rxon->reserved5 = 0;
+
+	iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
+
+	/* Apply the new configuration */
+	rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
+			      sizeof(struct iwl3945_rxon_cmd),
+			      staging_rxon);
+	if (rc) {
+		IWL_ERR(priv, "Error setting new configuration (%d).\n", rc);
+		return rc;
+	}
+
+	memcpy(active_rxon, staging_rxon, sizeof(*active_rxon));
+
+	iwl3945_clear_stations_table(priv);
+
+	/* If we issue a new RXON command which required a tune then we must
+	 * send a new TXPOWER command or we won't be able to Tx any frames */
+	rc = priv->cfg->ops->lib->send_tx_power(priv);
+	if (rc) {
+		IWL_ERR(priv, "Error setting Tx power (%d).\n", rc);
+		return rc;
+	}
+
+	/* Add the broadcast address so we can send broadcast frames */
+	if (iwl3945_add_station(priv, iwl_bcast_addr, 0, 0) ==
+	    IWL_INVALID_STATION) {
+		IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
+		return -EIO;
+	}
+
+	/* If we have set the ASSOC_MSK and we are in BSS mode then
+	 * add the IWL_AP_ID to the station rate table */
+	if (iwl_is_associated(priv) &&
+	    (priv->iw_mode == NL80211_IFTYPE_STATION))
+		if (iwl3945_add_station(priv, priv->active_rxon.bssid_addr,
+					1, 0)
+		    == IWL_INVALID_STATION) {
+			IWL_ERR(priv, "Error adding AP address for transmit\n");
+			return -EIO;
+		}
+
+	/* Init the hardware's rate fallback order based on the band */
+	rc = iwl3945_init_hw_rate_table(priv);
+	if (rc) {
+		IWL_ERR(priv, "Error setting HW rate table: %02X\n", rc);
+		return -EIO;
+	}
+
+	return 0;
+}
+
 /* will add 3945 channel switch cmd handling later */
 int iwl3945_hw_channel_switch(struct iwl_priv *priv, u16 channel)
 {
@@ -2775,6 +2919,7 @@ static int iwl3945_load_bsm(struct iwl_priv *priv)
 
 static struct iwl_hcmd_ops iwl3945_hcmd = {
 	.rxon_assoc = iwl3945_send_rxon_assoc,
+	.commit_rxon = iwl3945_commit_rxon,
 };
 
 static struct iwl_lib_ops iwl3945_lib = {