1 files changed, 409 insertions, 7 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
index c465c8590833..a27347425968 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-lib.c
@@ -331,7 +331,7 @@ u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
         } *hdr;
 
         hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
-                                                        EEPROM_5000_CALIB_ALL);
+                                                        EEPROM_CALIB_ALL);
         return hdr->version;
 
 }
@@ -348,22 +348,22 @@ static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
 
         switch (address & INDIRECT_TYPE_MSK) {
         case INDIRECT_HOST:
-                offset = iwl_eeprom_query16(priv, EEPROM_5000_LINK_HOST);
+                offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
                 break;
         case INDIRECT_GENERAL:
-                offset = iwl_eeprom_query16(priv, EEPROM_5000_LINK_GENERAL);
+                offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
                 break;
         case INDIRECT_REGULATORY:
-                offset = iwl_eeprom_query16(priv, EEPROM_5000_LINK_REGULATORY);
+                offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
                 break;
         case INDIRECT_CALIBRATION:
-                offset = iwl_eeprom_query16(priv, EEPROM_5000_LINK_CALIBRATION);
+                offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
                 break;
         case INDIRECT_PROCESS_ADJST:
-                offset = iwl_eeprom_query16(priv, EEPROM_5000_LINK_PROCESS_ADJST);
+                offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
                 break;
         case INDIRECT_OTHERS:
-                offset = iwl_eeprom_query16(priv, EEPROM_5000_LINK_OTHERS);
+                offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
                 break;
         default:
                 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
@@ -1111,3 +1111,405 @@ void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
         memcpy(&priv->_agn.last_phy_res, pkt->u.raw,
                sizeof(struct iwl_rx_phy_res));
 }
+
+static int iwl_get_single_channel_for_scan(struct iwl_priv *priv,
+                                     enum ieee80211_band band,
+                                     struct iwl_scan_channel *scan_ch)
+{
+        const struct ieee80211_supported_band *sband;
+        const struct iwl_channel_info *ch_info;
+        u16 passive_dwell = 0;
+        u16 active_dwell = 0;
+        int i, added = 0;
+        u16 channel = 0;
+
+        sband = iwl_get_hw_mode(priv, band);
+        if (!sband) {
+                IWL_ERR(priv, "invalid band\n");
+                return added;
+        }
+
+        active_dwell = iwl_get_active_dwell_time(priv, band, 0);
+        passive_dwell = iwl_get_passive_dwell_time(priv, band);
+
+        if (passive_dwell <= active_dwell)
+                passive_dwell = active_dwell + 1;
+
+        /* only scan single channel, good enough to reset the RF */
+        /* pick the first valid not in-use channel */
+        if (band == IEEE80211_BAND_5GHZ) {
+                for (i = 14; i < priv->channel_count; i++) {
+                        if (priv->channel_info[i].channel !=
+                            le16_to_cpu(priv->staging_rxon.channel)) {
+                                channel = priv->channel_info[i].channel;
+                                ch_info = iwl_get_channel_info(priv,
+                                        band, channel);
+                                if (is_channel_valid(ch_info))
+                                        break;
+                        }
+                }
+        } else {
+                for (i = 0; i < 14; i++) {
+                        if (priv->channel_info[i].channel !=
+                            le16_to_cpu(priv->staging_rxon.channel)) {
+                                        channel =
+                                                priv->channel_info[i].channel;
+                                        ch_info = iwl_get_channel_info(priv,
+                                                band, channel);
+                                        if (is_channel_valid(ch_info))
+                                                break;
+                        }
+                }
+        }
+        if (channel) {
+                scan_ch->channel = cpu_to_le16(channel);
+                scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
+                scan_ch->active_dwell = cpu_to_le16(active_dwell);
+                scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
+                /* Set txpower levels to defaults */
+                scan_ch->dsp_atten = 110;
+                if (band == IEEE80211_BAND_5GHZ)
+                        scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+                else
+                        scan_ch->tx_gain = ((1 << 5) | (5 << 3));
+                added++;
+        } else
+                IWL_ERR(priv, "no valid channel found\n");
+        return added;
+}
+
+static int iwl_get_channels_for_scan(struct iwl_priv *priv,
+                                     enum ieee80211_band band,
+                                     u8 is_active, u8 n_probes,
+                                     struct iwl_scan_channel *scan_ch)
+{
+        struct ieee80211_channel *chan;
+        const struct ieee80211_supported_band *sband;
+        const struct iwl_channel_info *ch_info;
+        u16 passive_dwell = 0;
+        u16 active_dwell = 0;
+        int added, i;
+        u16 channel;
+
+        sband = iwl_get_hw_mode(priv, band);
+        if (!sband)
+                return 0;
+
+        active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
+        passive_dwell = iwl_get_passive_dwell_time(priv, band);
+
+        if (passive_dwell <= active_dwell)
+                passive_dwell = active_dwell + 1;
+
+        for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) {
+                chan = priv->scan_request->channels[i];
+
+                if (chan->band != band)
+                        continue;
+
+                channel = ieee80211_frequency_to_channel(chan->center_freq);
+                scan_ch->channel = cpu_to_le16(channel);
+
+                ch_info = iwl_get_channel_info(priv, band, channel);
+                if (!is_channel_valid(ch_info)) {
+                        IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n",
+                                        channel);
+                        continue;
+                }
+
+                if (!is_active || is_channel_passive(ch_info) ||
+                    (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN))
+                        scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
+                else
+                        scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
+
+                if (n_probes)
+                        scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
+
+                scan_ch->active_dwell = cpu_to_le16(active_dwell);
+                scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
+
+                /* Set txpower levels to defaults */
+                scan_ch->dsp_atten = 110;
+
+                /* NOTE: if we were doing 6Mb OFDM for scans we'd use
+                 * power level:
+                 * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
+                 */
+                if (band == IEEE80211_BAND_5GHZ)
+                        scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
+                else
+                        scan_ch->tx_gain = ((1 << 5) | (5 << 3));
+
+                IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n",
+                               channel, le32_to_cpu(scan_ch->type),
+                               (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
+                                "ACTIVE" : "PASSIVE",
+                               (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
+                               active_dwell : passive_dwell);
+
+                scan_ch++;
+                added++;
+        }
+
+        IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added);
+        return added;
+}
+
+void iwlagn_request_scan(struct iwl_priv *priv)
+{
+        struct iwl_host_cmd cmd = {
+                .id = REPLY_SCAN_CMD,
+                .len = sizeof(struct iwl_scan_cmd),
+                .flags = CMD_SIZE_HUGE,
+        };
+        struct iwl_scan_cmd *scan;
+        struct ieee80211_conf *conf = NULL;
+        u32 rate_flags = 0;
+        u16 cmd_len;
+        u16 rx_chain = 0;
+        enum ieee80211_band band;
+        u8 n_probes = 0;
+        u8 rx_ant = priv->hw_params.valid_rx_ant;
+        u8 rate;
+        bool is_active = false;
+        int  chan_mod;
+        u8 active_chains;
+
+        conf = ieee80211_get_hw_conf(priv->hw);
+
+        cancel_delayed_work(&priv->scan_check);
+
+        if (!iwl_is_ready(priv)) {
+                IWL_WARN(priv, "request scan called when driver not ready.\n");
+                goto done;
+        }
+
+        /* Make sure the scan wasn't canceled before this queued work
+         * was given the chance to run... */
+        if (!test_bit(STATUS_SCANNING, &priv->status))
+                goto done;
+
+        /* This should never be called or scheduled if there is currently
+         * a scan active in the hardware. */
+        if (test_bit(STATUS_SCAN_HW, &priv->status)) {
+                IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. "
+                               "Ignoring second request.\n");
+                goto done;
+        }
+
+        if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
+                IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n");
+                goto done;
+        }
+
+        if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
+                IWL_DEBUG_HC(priv, "Scan request while abort pending.  Queuing.\n");
+                goto done;
+        }
+
+        if (iwl_is_rfkill(priv)) {
+                IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n");
+                goto done;
+        }
+
+        if (!test_bit(STATUS_READY, &priv->status)) {
+                IWL_DEBUG_HC(priv, "Scan request while uninitialized.  Queuing.\n");
+                goto done;
+        }
+
+        if (!priv->scan_cmd) {
+                priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) +
+                                         IWL_MAX_SCAN_SIZE, GFP_KERNEL);
+                if (!priv->scan_cmd) {
+                        IWL_DEBUG_SCAN(priv,
+                                       "fail to allocate memory for scan\n");
+                        goto done;
+                }
+        }
+        scan = priv->scan_cmd;
+        memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
+
+        scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
+        scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
+
+        if (iwl_is_associated(priv)) {
+                u16 interval = 0;
+                u32 extra;
+                u32 suspend_time = 100;
+                u32 scan_suspend_time = 100;
+                unsigned long flags;
+
+                IWL_DEBUG_INFO(priv, "Scanning while associated...\n");
+                spin_lock_irqsave(&priv->lock, flags);
+                interval = priv->beacon_int;
+                spin_unlock_irqrestore(&priv->lock, flags);
+
+                scan->suspend_time = 0;
+                scan->max_out_time = cpu_to_le32(200 * 1024);
+                if (!interval)
+                        interval = suspend_time;
+
+                extra = (suspend_time / interval) << 22;
+                scan_suspend_time = (extra |
+                    ((suspend_time % interval) * 1024));
+                scan->suspend_time = cpu_to_le32(scan_suspend_time);
+                IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n",
+                               scan_suspend_time, interval);
+        }
+
+        if (priv->is_internal_short_scan) {
+                IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n");
+        } else if (priv->scan_request->n_ssids) {
+                int i, p = 0;
+                IWL_DEBUG_SCAN(priv, "Kicking off active scan\n");
+                for (i = 0; i < priv->scan_request->n_ssids; i++) {
+                        /* always does wildcard anyway */
+                        if (!priv->scan_request->ssids[i].ssid_len)
+                                continue;
+                        scan->direct_scan[p].id = WLAN_EID_SSID;
+                        scan->direct_scan[p].len =
+                                priv->scan_request->ssids[i].ssid_len;
+                        memcpy(scan->direct_scan[p].ssid,
+                               priv->scan_request->ssids[i].ssid,
+                               priv->scan_request->ssids[i].ssid_len);
+                        n_probes++;
+                        p++;
+                }
+                is_active = true;
+        } else
+                IWL_DEBUG_SCAN(priv, "Start passive scan.\n");
+
+        scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
+        scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id;
+        scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
+
+        switch (priv->scan_band) {
+        case IEEE80211_BAND_2GHZ:
+                scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
+                chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK)
+                                       >> RXON_FLG_CHANNEL_MODE_POS;
+                if (chan_mod == CHANNEL_MODE_PURE_40) {
+                        rate = IWL_RATE_6M_PLCP;
+                } else {
+                        rate = IWL_RATE_1M_PLCP;
+                        rate_flags = RATE_MCS_CCK_MSK;
+                }
+                scan->good_CRC_th = IWL_GOOD_CRC_TH_DISABLED;
+                break;
+        case IEEE80211_BAND_5GHZ:
+                rate = IWL_RATE_6M_PLCP;
+                /*
+                 * If active scanning is requested but a certain channel is
+                 * marked passive, we can do active scanning if we detect
+                 * transmissions.
+                 *
+                 * There is an issue with some firmware versions that triggers
+                 * a sysassert on a "good CRC threshold" of zero (== disabled),
+                 * on a radar channel even though this means that we should NOT
+                 * send probes.
+                 *
+                 * The "good CRC threshold" is the number of frames that we
+                 * need to receive during our dwell time on a channel before
+                 * sending out probes -- setting this to a huge value will
+                 * mean we never reach it, but at the same time work around
+                 * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER
+                 * here instead of IWL_GOOD_CRC_TH_DISABLED.
+                 */
+                scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT :
+                                                IWL_GOOD_CRC_TH_NEVER;
+                break;
+        default:
+                IWL_WARN(priv, "Invalid scan band count\n");
+                goto done;
+        }
+
+        band = priv->scan_band;
+
+        if (priv->cfg->scan_antennas[band])
+                rx_ant = priv->cfg->scan_antennas[band];
+
+        priv->scan_tx_ant[band] =
+                        iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]);
+        rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
+        scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
+
+        /* In power save mode use one chain, otherwise use all chains */
+        if (test_bit(STATUS_POWER_PMI, &priv->status)) {
+                /* rx_ant has been set to all valid chains previously */
+                active_chains = rx_ant &
+                                ((u8)(priv->chain_noise_data.active_chains));
+                if (!active_chains)
+                        active_chains = rx_ant;
+
+                IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n",
+                                priv->chain_noise_data.active_chains);
+
+                rx_ant = first_antenna(active_chains);
+        }
+        /* MIMO is not used here, but value is required */
+        rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS;
+        rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
+        rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS;
+        rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
+        scan->rx_chain = cpu_to_le16(rx_chain);
+        if (!priv->is_internal_short_scan) {
+                cmd_len = iwl_fill_probe_req(priv,
+                                        (struct ieee80211_mgmt *)scan->data,
+                                        priv->scan_request->ie,
+                                        priv->scan_request->ie_len,
+                                        IWL_MAX_SCAN_SIZE - sizeof(*scan));
+        } else {
+                cmd_len = iwl_fill_probe_req(priv,
+                                        (struct ieee80211_mgmt *)scan->data,
+                                        NULL, 0,
+                                        IWL_MAX_SCAN_SIZE - sizeof(*scan));
+
+        }
+        scan->tx_cmd.len = cpu_to_le16(cmd_len);
+
+        scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK |
+                               RXON_FILTER_BCON_AWARE_MSK);
+
+        if (priv->is_internal_short_scan) {
+                scan->channel_count =
+                        iwl_get_single_channel_for_scan(priv, band,
+                                (void *)&scan->data[le16_to_cpu(
+                                scan->tx_cmd.len)]);
+        } else {
+                scan->channel_count =
+                        iwl_get_channels_for_scan(priv, band,
+                                is_active, n_probes,
+                                (void *)&scan->data[le16_to_cpu(
+                                scan->tx_cmd.len)]);
+        }
+        if (scan->channel_count == 0) {
+                IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count);
+                goto done;
+        }
+
+        cmd.len += le16_to_cpu(scan->tx_cmd.len) +
+            scan->channel_count * sizeof(struct iwl_scan_channel);
+        cmd.data = scan;
+        scan->len = cpu_to_le16(cmd.len);
+
+        set_bit(STATUS_SCAN_HW, &priv->status);
+        if (iwl_send_cmd_sync(priv, &cmd))
+                goto done;
+
+        queue_delayed_work(priv->workqueue, &priv->scan_check,
+                           IWL_SCAN_CHECK_WATCHDOG);
+
+        return;
+
+ done:
+        /* Cannot perform scan. Make sure we clear scanning
+        * bits from status so next scan request can be performed.
+        * If we don't clear scanning status bit here all next scan
+        * will fail
+        */
+        clear_bit(STATUS_SCAN_HW, &priv->status);
+        clear_bit(STATUS_SCANNING, &priv->status);
+        /* inform mac80211 scan aborted */
+        queue_work(priv->workqueue, &priv->scan_completed);
+}