When monitor mode is enabled, this will make b43 read out the
full 64-bit MAC time from the chip for each received packet.
Signed-off-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/b43/b43.h | 2 ++
drivers/net/wireless/b43/main.c | 2 ++
drivers/net/wireless/b43/xmit.c | 18 +++++++++++++++++-
3 files changed, 21 insertions(+), 1 deletion(-)
--- everything.orig/drivers/net/wireless/b43/b43.h 2007-11-22 22:56:20.648678709 +0100
+++ everything/drivers/net/wireless/b43/b43.h 2007-11-22 23:03:27.268675020 +0100
@@ -635,6 +635,8 @@ struct b43_wl {
/* List of all wireless devices on this chip */
struct list_head devlist;
u8 nr_devs;
+
+ bool radiotap_enabled;
};
/* Pointers to the firmware data and meta information about it. */
--- everything.orig/drivers/net/wireless/b43/main.c 2007-11-22 22:55:49.608678981 +0100
+++ everything/drivers/net/wireless/b43/main.c 2007-11-22 23:03:53.678676051 +0100
@@ -2853,6 +2853,8 @@ static int b43_op_config(struct ieee8021
b43_short_slot_timing_disable(dev);
}
+ dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
+
/* Adjust the desired TX power level. */
if (conf->power_level != 0) {
if (conf->power_level != phy->power_level) {
--- everything.orig/drivers/net/wireless/b43/xmit.c 2007-11-22 22:54:33.498725965 +0100
+++ everything/drivers/net/wireless/b43/xmit.c 2007-11-22 23:15:44.808681966 +0100
@@ -526,7 +526,23 @@ void b43_rx(struct b43_wldev *dev, struc
else
status.rate = b43_plcp_get_bitrate_cck(plcp);
status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
- status.mactime = mactime;
+
+ /*
+ * If monitors are present get full 64-bit timestamp. This
+ * code assumes we get to process the packet within 16 bits
+ * of timestamp, i.e. about 65 milliseconds after the PHY
+ * received the first symbol.
+ */
+ if (dev->wl->radiotap_enabled) {
+ u16 low_mactime_now;
+
+ b43_tsf_read(dev, &status.mactime);
+ low_mactime_now = status.mactime;
+ status.mactime = status.mactime & ~0xFFFFULL;
+ status.mactime += mactime;
+ if (low_mactime_now <= mactime)
+ status.mactime -= 0x10000;
+ }
chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
switch (chanstat & B43_RX_CHAN_PHYTYPE) {
-
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