[PATCH] Marvell Libertas 8388 802.11b/g USB driver

Add the Marvell Libertas 8388 802.11 USB driver.

Signed-off-by: Marcelo Tosatti <marcelo@kvack.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 588 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/assoc.c b/drivers/net/wireless/libertas/assoc.c
new file mode 100644
index 00000000000..b55c7f57aca
--- /dev/null
+++ b/drivers/net/wireless/libertas/assoc.c
@@ -0,0 +1,588 @@
+/* Copyright (C) 2006, Red Hat, Inc. */
+
+#include <linux/bitops.h>
+#include <net/ieee80211.h>
+
+#include "assoc.h"
+#include "join.h"
+#include "decl.h"
+#include "hostcmd.h"
+#include "host.h"
+
+
+static const u8 bssid_any[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+static const u8 bssid_off[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+static int assoc_helper_essid(wlan_private *priv,
+                              struct assoc_request * assoc_req)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int ret = 0;
+	int i;
+
+	ENTER();
+
+	lbs_pr_debug(1, "New SSID requested: %s\n", assoc_req->ssid.ssid);
+	if (assoc_req->mode == wlan802_11infrastructure) {
+		if (adapter->prescan) {
+			libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 1);
+		}
+
+		i = libertas_find_SSID_in_list(adapter, &assoc_req->ssid,
+				NULL, wlan802_11infrastructure);
+		if (i >= 0) {
+			lbs_pr_debug(1,
+			       "SSID found in scan list ... associating...\n");
+
+			ret = wlan_associate(priv, &adapter->scantable[i]);
+			if (ret == 0) {
+				memcpy(&assoc_req->bssid,
+				       &adapter->scantable[i].macaddress,
+				       ETH_ALEN);
+			}
+		} else {
+			lbs_pr_debug(1, "SSID '%s' not found; cannot associate\n",
+				assoc_req->ssid.ssid);
+		}
+	} else if (assoc_req->mode == wlan802_11ibss) {
+		/* Scan for the network, do not save previous results.  Stale
+		 *   scan data will cause us to join a non-existant adhoc network
+		 */
+		libertas_send_specific_SSID_scan(priv, &assoc_req->ssid, 0);
+
+		/* Search for the requested SSID in the scan table */
+		i = libertas_find_SSID_in_list(adapter, &assoc_req->ssid, NULL,
+				wlan802_11ibss);
+		if (i >= 0) {
+			lbs_pr_debug(1, "SSID found at %d in List, so join\n", ret);
+			libertas_join_adhoc_network(priv, &adapter->scantable[i]);
+		} else {
+			/* else send START command */
+			lbs_pr_debug(1, "SSID not found in list, so creating adhoc"
+				" with SSID '%s'\n", assoc_req->ssid.ssid);
+			libertas_start_adhoc_network(priv, &assoc_req->ssid);
+		}
+		memcpy(&assoc_req->bssid, &adapter->current_addr, ETH_ALEN);
+	}
+
+	LEAVE();
+	return ret;
+}
+
+
+static int assoc_helper_bssid(wlan_private *priv,
+                              struct assoc_request * assoc_req)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int i, ret = 0;
+
+	ENTER();
+
+	lbs_pr_debug(1, "ASSOC: WAP: BSSID = " MAC_FMT "\n",
+		MAC_ARG(assoc_req->bssid));
+
+	/* Search for index position in list for requested MAC */
+	i = libertas_find_BSSID_in_list(adapter, assoc_req->bssid,
+			    assoc_req->mode);
+	if (i < 0) {
+		lbs_pr_debug(1, "ASSOC: WAP: BSSID " MAC_FMT " not found, "
+			"cannot associate.\n", MAC_ARG(assoc_req->bssid));
+		goto out;
+	}
+
+	if (assoc_req->mode == wlan802_11infrastructure) {
+		ret = wlan_associate(priv, &adapter->scantable[i]);
+		lbs_pr_debug(1, "ASSOC: return from wlan_associate(bssd) was %d\n", ret);
+	} else if (assoc_req->mode == wlan802_11ibss) {
+		libertas_join_adhoc_network(priv, &adapter->scantable[i]);
+	}
+	memcpy(&assoc_req->ssid, &adapter->scantable[i].ssid,
+		sizeof(struct WLAN_802_11_SSID));
+
+out:
+	LEAVE();
+	return ret;
+}
+
+
+static int assoc_helper_associate(wlan_private *priv,
+                                  struct assoc_request * assoc_req)
+{
+	int ret = 0, done = 0;
+
+	/* If we're given and 'any' BSSID, try associating based on SSID */
+
+	if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
+		if (memcmp(bssid_any, assoc_req->bssid, ETH_ALEN)
+		    && memcmp(bssid_off, assoc_req->bssid, ETH_ALEN)) {
+			ret = assoc_helper_bssid(priv, assoc_req);
+			done = 1;
+			if (ret) {
+				lbs_pr_debug(1, "ASSOC: bssid: ret = %d\n", ret);
+			}
+		}
+	}
+
+	if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
+		ret = assoc_helper_essid(priv, assoc_req);
+		if (ret) {
+			lbs_pr_debug(1, "ASSOC: bssid: ret = %d\n", ret);
+		}
+	}
+
+	return ret;
+}
+
+
+static int assoc_helper_mode(wlan_private *priv,
+                             struct assoc_request * assoc_req)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int ret = 0;
+
+	ENTER();
+
+	if (assoc_req->mode == adapter->inframode) {
+		LEAVE();
+		return 0;
+	}
+
+	if (assoc_req->mode == wlan802_11infrastructure) {
+		if (adapter->psstate != PS_STATE_FULL_POWER)
+			libertas_ps_wakeup(priv, cmd_option_waitforrsp);
+		adapter->psmode = wlan802_11powermodecam;
+	}
+
+	adapter->inframode = assoc_req->mode;
+	ret = libertas_prepare_and_send_command(priv,
+				    cmd_802_11_snmp_mib,
+				    0, cmd_option_waitforrsp,
+				    OID_802_11_INFRASTRUCTURE_MODE,
+				    (void *) assoc_req->mode);
+
+	LEAVE();
+	return ret;
+}
+
+
+static int assoc_helper_wep_keys(wlan_private *priv,
+                                 struct assoc_request * assoc_req)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int i;
+	int ret = 0;
+
+	ENTER();
+
+	/* Set or remove WEP keys */
+	if (   assoc_req->wep_keys[0].len
+	    || assoc_req->wep_keys[1].len
+	    || assoc_req->wep_keys[2].len
+	    || assoc_req->wep_keys[3].len) {
+		ret = libertas_prepare_and_send_command(priv,
+					    cmd_802_11_set_wep,
+					    cmd_act_add,
+					    cmd_option_waitforrsp,
+					    0, assoc_req);
+	} else {
+		ret = libertas_prepare_and_send_command(priv,
+					    cmd_802_11_set_wep,
+					    cmd_act_remove,
+					    cmd_option_waitforrsp,
+					    0, NULL);
+	}
+
+	if (ret)
+		goto out;
+
+	/* enable/disable the MAC's WEP packet filter */
+	if (assoc_req->secinfo.WEPstatus == wlan802_11WEPenabled)
+		adapter->currentpacketfilter |= cmd_act_mac_wep_enable;
+	else
+		adapter->currentpacketfilter &= ~cmd_act_mac_wep_enable;
+	ret = libertas_set_mac_packet_filter(priv);
+	if (ret)
+		goto out;
+
+	mutex_lock(&adapter->lock);
+
+	/* Copy WEP keys into adapter wep key fields */
+	for (i = 0; i < 4; i++) {
+		memcpy(&adapter->wep_keys[i], &assoc_req->wep_keys[i],
+			sizeof(struct WLAN_802_11_KEY));
+	}
+	adapter->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
+
+	mutex_unlock(&adapter->lock);
+
+out:
+	LEAVE();
+	return ret;
+}
+
+static int assoc_helper_secinfo(wlan_private *priv,
+                                struct assoc_request * assoc_req)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int ret = 0;
+
+	ENTER();
+
+	memcpy(&adapter->secinfo, &assoc_req->secinfo,
+		sizeof(struct wlan_802_11_security));
+
+	ret = libertas_set_mac_packet_filter(priv);
+
+	LEAVE();
+	return ret;
+}
+
+
+static int assoc_helper_wpa_keys(wlan_private *priv,
+                                 struct assoc_request * assoc_req)
+{
+	int ret = 0;
+
+	ENTER();
+
+	/* enable/Disable RSN */
+	ret = libertas_prepare_and_send_command(priv,
+				    cmd_802_11_enable_rsn,
+				    cmd_act_set,
+				    cmd_option_waitforrsp,
+				    0, assoc_req);
+	if (ret)
+		goto out;
+
+	ret = libertas_prepare_and_send_command(priv,
+				    cmd_802_11_key_material,
+				    cmd_act_set,
+				    cmd_option_waitforrsp,
+				    0, assoc_req);
+
+out:
+	LEAVE();
+	return ret;
+}
+
+
+static int assoc_helper_wpa_ie(wlan_private *priv,
+                               struct assoc_request * assoc_req)
+{
+	wlan_adapter *adapter = priv->adapter;
+	int ret = 0;
+
+	ENTER();
+
+	if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
+		memcpy(&adapter->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
+		adapter->wpa_ie_len = assoc_req->wpa_ie_len;
+	} else {
+		memset(&adapter->wpa_ie, 0, MAX_WPA_IE_LEN);
+		adapter->wpa_ie_len = 0;
+	}
+
+	LEAVE();
+	return ret;
+}
+
+
+static int should_deauth_infrastructure(wlan_adapter *adapter,
+                                        struct assoc_request * assoc_req)
+{
+	if (adapter->connect_status != libertas_connected)
+		return 0;
+
+	if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
+		lbs_pr_debug(1, "Deauthenticating due to new SSID in "
+			" configuration request.\n");
+		return 1;
+	}
+
+	if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
+		if (adapter->secinfo.authmode !=
+		    assoc_req->secinfo.authmode) {
+			lbs_pr_debug(1, "Deauthenticating due to updated security "
+				"info in configuration request.\n");
+			return 1;
+		}
+	}
+
+	if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
+		lbs_pr_debug(1, "Deauthenticating due to new BSSID in "
+			" configuration request.\n");
+		return 1;
+	}
+
+	/* FIXME: deal with 'auto' mode somehow */
+	if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
+		if (assoc_req->mode != wlan802_11infrastructure)
+			return 1;
+	}
+
+	return 0;
+}
+
+
+static int should_stop_adhoc(wlan_adapter *adapter,
+                             struct assoc_request * assoc_req)
+{
+	if (adapter->connect_status != libertas_connected)
+		return 0;
+
+	if (adapter->curbssparams.ssid.ssidlength != assoc_req->ssid.ssidlength)
+		return 1;
+	if (memcmp(adapter->curbssparams.ssid.ssid, assoc_req->ssid.ssid,
+			sizeof(struct WLAN_802_11_SSID)))
+		return 1;
+
+	/* FIXME: deal with 'auto' mode somehow */
+	if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
+		if (assoc_req->mode != wlan802_11ibss)
+			return 1;
+	}
+
+	return 0;
+}
+
+
+void wlan_association_worker(struct work_struct *work)
+{
+	wlan_private *priv = container_of(work, wlan_private, assoc_work.work);
+	wlan_adapter *adapter = priv->adapter;
+	struct assoc_request * assoc_req = NULL;
+	int ret = 0;
+	int find_any_ssid = 0;
+
+	ENTER();
+
+	mutex_lock(&adapter->lock);
+	assoc_req = adapter->assoc_req;
+	adapter->assoc_req = NULL;
+	mutex_unlock(&adapter->lock);
+
+	if (!assoc_req) {
+		LEAVE();
+		return;
+	}
+
+	lbs_pr_debug(1, "ASSOC: starting new association request: flags = 0x%lX\n",
+		assoc_req->flags);
+
+	/* If 'any' SSID was specified, find an SSID to associate with */
+	if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
+	    && !assoc_req->ssid.ssidlength)
+		find_any_ssid = 1;
+
+	/* But don't use 'any' SSID if there's a valid locked BSSID to use */
+	if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
+		if (memcmp(&assoc_req->bssid, bssid_any, ETH_ALEN)
+		    && memcmp(&assoc_req->bssid, bssid_off, ETH_ALEN))
+			find_any_ssid = 0;
+	}
+
+	if (find_any_ssid) {
+		enum WLAN_802_11_NETWORK_INFRASTRUCTURE new_mode;
+
+		ret = libertas_find_best_network_SSID(priv, &assoc_req->ssid,
+				assoc_req->mode, &new_mode);
+		if (ret) {
+			lbs_pr_debug(1, "Could not find best network\n");
+			ret = -ENETUNREACH;
+			goto out;
+		}
+
+		/* Ensure we switch to the mode of the AP */
+		if (assoc_req->mode == wlan802_11autounknown) {
+			set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
+			assoc_req->mode = new_mode;
+		}
+	}
+
+	/*
+	 * Check if the attributes being changing require deauthentication
+	 * from the currently associated infrastructure access point.
+	 */
+	if (adapter->inframode == wlan802_11infrastructure) {
+		if (should_deauth_infrastructure(adapter, assoc_req)) {
+			ret = libertas_send_deauthentication(priv);
+			if (ret) {
+				lbs_pr_debug(1, "Deauthentication due to new "
+					"configuration request failed: %d\n",
+					ret);
+			}
+		}
+	} else if (adapter->inframode == wlan802_11ibss) {
+		if (should_stop_adhoc(adapter, assoc_req)) {
+			ret = libertas_stop_adhoc_network(priv);
+			if (ret) {
+				lbs_pr_debug(1, "Teardown of AdHoc network due to "
+					"new configuration request failed: %d\n",
+					ret);
+			}
+
+		}
+	}
+
+	/* Send the various configuration bits to the firmware */
+	if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
+		ret = assoc_helper_mode(priv, assoc_req);
+		if (ret) {
+lbs_pr_debug(1, "ASSOC(:%d) mode: ret = %d\n", __LINE__, ret);
+			goto out;
+		}
+	}
+
+	if (   test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
+	    || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
+		ret = assoc_helper_wep_keys(priv, assoc_req);
+		if (ret) {
+lbs_pr_debug(1, "ASSOC(:%d) wep_keys: ret = %d\n", __LINE__, ret);
+			goto out;
+		}
+	}
+
+	if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
+		ret = assoc_helper_secinfo(priv, assoc_req);
+		if (ret) {
+lbs_pr_debug(1, "ASSOC(:%d) secinfo: ret = %d\n", __LINE__, ret);
+			goto out;
+		}
+	}
+
+	if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
+		ret = assoc_helper_wpa_ie(priv, assoc_req);
+		if (ret) {
+lbs_pr_debug(1, "ASSOC(:%d) wpa_ie: ret = %d\n", __LINE__, ret);
+			goto out;
+		}
+	}
+
+	if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
+	    || test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
+		ret = assoc_helper_wpa_keys(priv, assoc_req);
+		if (ret) {
+lbs_pr_debug(1, "ASSOC(:%d) wpa_keys: ret = %d\n", __LINE__, ret);
+			goto out;
+		}
+	}
+
+	/* SSID/BSSID should be the _last_ config option set, because they
+	 * trigger the association attempt.
+	 */
+	if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
+	    || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
+		int success = 1;
+
+		ret = assoc_helper_associate(priv, assoc_req);
+		if (ret) {
+			lbs_pr_debug(1, "ASSOC: association attempt unsuccessful: %d\n",
+				ret);
+			success = 0;
+		}
+
+		if (adapter->connect_status != libertas_connected) {
+			lbs_pr_debug(1, "ASSOC: assoication attempt unsuccessful, "
+				"not connected.\n");
+			success = 0;
+		}
+
+		if (success) {
+			lbs_pr_debug(1, "ASSOC: association attempt successful. "
+				"Associated to '%s' (" MAC_FMT ")\n",
+				assoc_req->ssid.ssid, MAC_ARG(assoc_req->bssid));
+			libertas_prepare_and_send_command(priv,
+				cmd_802_11_rssi,
+				0, cmd_option_waitforrsp, 0, NULL);
+
+			libertas_prepare_and_send_command(priv,
+				cmd_802_11_get_log,
+				0, cmd_option_waitforrsp, 0, NULL);
+		} else {
+
+			ret = -1;
+		}
+	}
+
+out:
+	if (ret) {
+		lbs_pr_debug(1, "ASSOC: reconfiguration attempt unsuccessful: %d\n",
+			ret);
+	}
+	kfree(assoc_req);
+	LEAVE();
+}
+
+
+/*
+ * Caller MUST hold any necessary locks
+ */
+struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
+{
+	struct assoc_request * assoc_req;
+
+	if (!adapter->assoc_req) {
+		adapter->assoc_req = kzalloc(sizeof(struct assoc_request), GFP_KERNEL);
+		if (!adapter->assoc_req) {
+			lbs_pr_info("Not enough memory to allocate association"
+				" request!\n");
+			return NULL;
+		}
+	}
+
+	/* Copy current configuration attributes to the association request,
+	 * but don't overwrite any that are already set.
+	 */
+	assoc_req = adapter->assoc_req;
+	if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
+		memcpy(&assoc_req->ssid, adapter->curbssparams.ssid.ssid,
+			adapter->curbssparams.ssid.ssidlength);
+	}
+
+	if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
+		assoc_req->channel = adapter->curbssparams.channel;
+
+	if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
+		assoc_req->mode = adapter->inframode;
+
+	if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
+		memcpy(&assoc_req->bssid, adapter->curbssparams.bssid,
+			ETH_ALEN);
+	}
+
+	if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
+		int i;
+		for (i = 0; i < 4; i++) {
+			memcpy(&assoc_req->wep_keys[i], &adapter->wep_keys[i],
+				sizeof(struct WLAN_802_11_KEY));
+		}
+	}
+
+	if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
+		assoc_req->wep_tx_keyidx = adapter->wep_tx_keyidx;
+
+	if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
+		memcpy(&assoc_req->wpa_mcast_key, &adapter->wpa_mcast_key,
+			sizeof(struct WLAN_802_11_KEY));
+	}
+
+	if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
+		memcpy(&assoc_req->wpa_unicast_key, &adapter->wpa_unicast_key,
+			sizeof(struct WLAN_802_11_KEY));
+	}
+
+	if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
+		memcpy(&assoc_req->secinfo, &adapter->secinfo,
+			sizeof(struct wlan_802_11_security));
+	}
+
+	if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
+		memcpy(&assoc_req->wpa_ie, &adapter->wpa_ie,
+			MAX_WPA_IE_LEN);
+		assoc_req->wpa_ie_len = adapter->wpa_ie_len;
+	}
+
+	return assoc_req;
+}
+
+