1 files changed, 76 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index c3df5aa8df91..370b66c444b3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -348,12 +348,86 @@ static ssize_t iwl_dbgfs_log_event_write(struct file *file,
         return count;
 }
 
+
+
+static ssize_t iwl_dbgfs_channels_read(struct file *file, char __user *user_buf,
+                                       size_t count, loff_t *ppos)
+{
+        struct iwl_priv *priv = (struct iwl_priv *)file->private_data;
+        struct ieee80211_channel *channels = NULL;
+        const struct ieee80211_supported_band *supp_band = NULL;
+        int pos = 0, i, bufsz = PAGE_SIZE;
+        char *buf;
+        ssize_t ret;
+
+        if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
+                return -EAGAIN;
+
+        buf = kzalloc(bufsz, GFP_KERNEL);
+        if (!buf) {
+                IWL_ERROR("Can not allocate Buffer\n");
+                return -ENOMEM;
+        }
+
+        supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
+        channels = supp_band->channels;
+
+        pos += scnprintf(buf + pos, bufsz - pos,
+                        "Displaying %d channels in 2.4GHz band 802.11bg):\n",
+                         supp_band->n_channels);
+
+        for (i = 0; i < supp_band->n_channels; i++)
+                pos += scnprintf(buf + pos, bufsz - pos,
+                                "%d: %ddBm: BSS%s%s, %s.\n",
+                                ieee80211_frequency_to_channel(
+                                channels[i].center_freq),
+                                channels[i].max_power,
+                                channels[i].flags & IEEE80211_CHAN_RADAR ?
+                                " (IEEE 802.11h required)" : "",
+                                (!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
+                                || (channels[i].flags &
+                                IEEE80211_CHAN_RADAR)) ? "" :
+                                ", IBSS",
+                                channels[i].flags &
+                                IEEE80211_CHAN_PASSIVE_SCAN ?
+                                "passive only" : "active/passive");
+
+        supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
+        channels = supp_band->channels;
+
+        pos += scnprintf(buf + pos, bufsz - pos,
+                        "Displaying %d channels in 5.2GHz band (802.11a)\n",
+                        supp_band->n_channels);
+
+        for (i = 0; i < supp_band->n_channels; i++)
+                pos += scnprintf(buf + pos, bufsz - pos,
+                                "%d: %ddBm: BSS%s%s, %s.\n",
+                                ieee80211_frequency_to_channel(
+                                channels[i].center_freq),
+                                channels[i].max_power,
+                                channels[i].flags & IEEE80211_CHAN_RADAR ?
+                                " (IEEE 802.11h required)" : "",
+                                ((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
+                                || (channels[i].flags &
+                                IEEE80211_CHAN_RADAR)) ? "" :
+                                ", IBSS",
+                                channels[i].flags &
+                                IEEE80211_CHAN_PASSIVE_SCAN ?
+                                "passive only" : "active/passive");
+
+        ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+        kfree(buf);
+        return ret;
+}
+
+
 DEBUGFS_READ_WRITE_FILE_OPS(sram);
 DEBUGFS_WRITE_FILE_OPS(log_event);
 DEBUGFS_READ_FILE_OPS(eeprom);
 DEBUGFS_READ_FILE_OPS(stations);
 DEBUGFS_READ_FILE_OPS(rx_statistics);
 DEBUGFS_READ_FILE_OPS(tx_statistics);
+DEBUGFS_READ_FILE_OPS(channels);
 
 /*
  * Create the debugfs files and directories
@@ -387,6 +461,7 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
         DEBUGFS_ADD_FILE(stations, data);
         DEBUGFS_ADD_FILE(rx_statistics, data);
         DEBUGFS_ADD_FILE(tx_statistics, data);
+        DEBUGFS_ADD_FILE(channels, data);
         DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal);
         DEBUGFS_ADD_BOOL(disable_chain_noise, rf,
                          &priv->disable_chain_noise_cal);
@@ -415,6 +490,7 @@ void iwl_dbgfs_unregister(struct iwl_priv *priv)
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations);
+        DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_channels);
         DEBUGFS_REMOVE(priv->dbgfs->dir_data);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity);
         DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise);