commit 977206d79fdc9fc1b153e0b52c56e0be59586f37
author Helmut Schaa <helmut.schaa@googlemail.com> Mon Dec 13 12:31:58 2010 +0100
committer John W. Linville <linville@tuxdriver.com> Mon Dec 13 15:23:34 2010 -0500
tree 73600833cdc74acb1219d22078cfc153f4c1901e
parent 38c8a566fcfe080c910bb6b348d40121df2b8e88

rt2x00: Implement get_survey callback for rt2800

Implement the get_survey callback to allow user space to read statistics
about the current channel condition.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800lib.c

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 9b592d9..b7de1a5 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -1625,6 +1625,13 @@
 	}
 
 	msleep(1);
+
+	/*
+	 * Clear channel statistic counters
+	 */
+	rt2800_register_read(rt2x00dev, CH_IDLE_STA, &reg);
+	rt2800_register_read(rt2x00dev, CH_BUSY_STA, &reg);
+	rt2800_register_read(rt2x00dev, CH_BUSY_STA_SEC, &reg);
 }
 
 static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev,
@@ -2259,6 +2266,17 @@
 	rt2x00_set_field32(&reg, INT_TIMER_CFG_PRE_TBTT_TIMER, 6 << 4);
 	rt2800_register_write(rt2x00dev, INT_TIMER_CFG, reg);
 
+	/*
+	 * Set up channel statistics timer
+	 */
+	rt2800_register_read(rt2x00dev, CH_TIME_CFG, &reg);
+	rt2x00_set_field32(&reg, CH_TIME_CFG_EIFS_BUSY, 1);
+	rt2x00_set_field32(&reg, CH_TIME_CFG_NAV_BUSY, 1);
+	rt2x00_set_field32(&reg, CH_TIME_CFG_RX_BUSY, 1);
+	rt2x00_set_field32(&reg, CH_TIME_CFG_TX_BUSY, 1);
+	rt2x00_set_field32(&reg, CH_TIME_CFG_TMR_EN, 1);
+	rt2800_register_write(rt2x00dev, CH_TIME_CFG, reg);
+
 	return 0;
 }
 
@@ -3539,6 +3557,37 @@
 }
 EXPORT_SYMBOL_GPL(rt2800_ampdu_action);
 
+int rt2800_get_survey(struct ieee80211_hw *hw, int idx,
+		      struct survey_info *survey)
+{
+	struct rt2x00_dev *rt2x00dev = hw->priv;
+	struct ieee80211_conf *conf = &hw->conf;
+	u32 idle, busy, busy_ext;
+
+	if (idx != 0)
+		return -ENOENT;
+
+	survey->channel = conf->channel;
+
+	rt2800_register_read(rt2x00dev, CH_IDLE_STA, &idle);
+	rt2800_register_read(rt2x00dev, CH_BUSY_STA, &busy);
+	rt2800_register_read(rt2x00dev, CH_BUSY_STA_SEC, &busy_ext);
+
+	if (idle || busy) {
+		survey->filled = SURVEY_INFO_CHANNEL_TIME |
+				 SURVEY_INFO_CHANNEL_TIME_BUSY |
+				 SURVEY_INFO_CHANNEL_TIME_EXT_BUSY;
+
+		survey->channel_time = (idle + busy) / 1000;
+		survey->channel_time_busy = busy / 1000;
+		survey->channel_time_ext_busy = busy_ext / 1000;
+	}
+
+	return 0;
+
+}
+EXPORT_SYMBOL_GPL(rt2800_get_survey);
+
 MODULE_AUTHOR(DRV_PROJECT ", Bartlomiej Zolnierkiewicz");
 MODULE_VERSION(DRV_VERSION);
 MODULE_DESCRIPTION("Ralink RT2800 library");