From: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx>
Implement the get_survey callback to allow user space to read statistics
about the current channel condition.
Signed-off-by: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx>
Signed-off-by: Ivo van Doorn <IvDoorn@xxxxxxxxx>
---
drivers/net/wireless/rt2x00/rt2800.h | 10 ++++++
drivers/net/wireless/rt2x00/rt2800lib.c | 49 +++++++++++++++++++++++++++++++
drivers/net/wireless/rt2x00/rt2800lib.h | 2 +
drivers/net/wireless/rt2x00/rt2800pci.c | 1 +
drivers/net/wireless/rt2x00/rt2800usb.c | 1 +
5 files changed, 63 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h
index 9dcbf87..03f9fa1 100644
--- a/drivers/net/wireless/rt2x00/rt2800.h
+++ b/drivers/net/wireless/rt2x00/rt2800.h
@@ -699,8 +699,18 @@
/*
* CH_TIME_CFG: count as channel busy
+ * EIFS_BUSY: Count EIFS as channel busy
+ * NAV_BUSY: Count NAS as channel busy
+ * RX_BUSY: Count RX as channel busy
+ * TX_BUSY: Count TX as channel busy
+ * TMR_EN: Enable channel statistics timer
*/
#define CH_TIME_CFG 0x110c
+#define CH_TIME_CFG_EIFS_BUSY FIELD32(0x00000010)
+#define CH_TIME_CFG_NAV_BUSY FIELD32(0x00000008)
+#define CH_TIME_CFG_RX_BUSY FIELD32(0x00000004)
+#define CH_TIME_CFG_TX_BUSY FIELD32(0x00000002)
+#define CH_TIME_CFG_TMR_EN FIELD32(0x00000001)
/*
* PBF_LIFE_TIMER: TX/RX MPDU timestamp timer (free run) Unit: 1us
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 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev,
}
msleep(1);
+
+ /*
+ * Clear channel statistic counters
+ */
+ rt2800_register_read(rt2x00dev, CH_IDLE_STA, ®);
+ rt2800_register_read(rt2x00dev, CH_BUSY_STA, ®);
+ rt2800_register_read(rt2x00dev, CH_BUSY_STA_SEC, ®);
}
static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev,
@@ -2259,6 +2266,17 @@ static int rt2800_init_registers(struct rt2x00_dev *rt2x00dev)
rt2x00_set_field32(®, 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, ®);
+ rt2x00_set_field32(®, CH_TIME_CFG_EIFS_BUSY, 1);
+ rt2x00_set_field32(®, CH_TIME_CFG_NAV_BUSY, 1);
+ rt2x00_set_field32(®, CH_TIME_CFG_RX_BUSY, 1);
+ rt2x00_set_field32(®, CH_TIME_CFG_TX_BUSY, 1);
+ rt2x00_set_field32(®, CH_TIME_CFG_TMR_EN, 1);
+ rt2800_register_write(rt2x00dev, CH_TIME_CFG, reg);
+
return 0;
}
@@ -3539,6 +3557,37 @@ int rt2800_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
}
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");
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.h b/drivers/net/wireless/rt2x00/rt2800lib.h
index 81cbc92..e3c995a 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.h
+++ b/drivers/net/wireless/rt2x00/rt2800lib.h
@@ -199,5 +199,7 @@ u64 rt2800_get_tsf(struct ieee80211_hw *hw);
int rt2800_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
enum ieee80211_ampdu_mlme_action action,
struct ieee80211_sta *sta, u16 tid, u16 *ssn);
+int rt2800_get_survey(struct ieee80211_hw *hw, int idx,
+ struct survey_info *survey);
#endif /* RT2800LIB_H */
diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
index 433c7f3..3a1468a 100644
--- a/drivers/net/wireless/rt2x00/rt2800pci.c
+++ b/drivers/net/wireless/rt2x00/rt2800pci.c
@@ -943,6 +943,7 @@ static const struct ieee80211_ops rt2800pci_mac80211_ops = {
.rfkill_poll = rt2x00mac_rfkill_poll,
.ampdu_action = rt2800_ampdu_action,
.flush = rt2x00mac_flush,
+ .get_survey = rt2800_get_survey,
};
static const struct rt2800_ops rt2800pci_rt2800_ops = {
diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index 935b76d..042e47d 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -562,6 +562,7 @@ static const struct ieee80211_ops rt2800usb_mac80211_ops = {
.rfkill_poll = rt2x00mac_rfkill_poll,
.ampdu_action = rt2800_ampdu_action,
.flush = rt2x00mac_flush,
+ .get_survey = rt2800_get_survey,
};
static const struct rt2800_ops rt2800usb_rt2800_ops = {
--
1.7.2.3
--
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