iwlwifi: adding channels to sysfs

This patch returns channel list to sysfs.

Signed-off-by: Ester Kummer <ester.kummer@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index 81a1c22874a1ab2785ec29d153a00a8ff3d9b8f7..c179b21bd0d839981b810a92bf06501f1e29cbfa 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -4122,8 +4122,62 @@ static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
 static ssize_t show_channels(struct device *d,
                             struct device_attribute *attr, char *buf)
 {
-       /* all this shit doesn't belong into sysfs anyway */
-       return 0;
+
+       struct iwl_priv *priv = dev_get_drvdata(d);
+       struct ieee80211_channel *channels = NULL;
+       const struct ieee80211_supported_band *supp_band = NULL;
+       int len = 0, i;
+       int count = 0;
+
+       if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
+               return -EAGAIN;
+
+       supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
+       channels = supp_band->channels;
+       count = supp_band->n_channels;
+
+       len += sprintf(&buf[len],
+                       "Displaying %d channels in 2.4GHz band "
+                       "(802.11bg):\n", count);
+
+       for (i = 0; i < count; i++)
+               len += sprintf(&buf[len], "%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;
+       count = supp_band->n_channels;
+
+       len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
+                       "(802.11a):\n", count);
+
+       for (i = 0; i < count; i++)
+               len += sprintf(&buf[len], "%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");
+
+       return len;
 }
 
 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);