wl1271: Implement delayed entry into ELP
Implement delayed entry into ELP. This will promote the following:
- Less redundant sleep/wake cycles (better perf)
- Avoids known firmware issues with going to ELP too fast after an
operation
Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Vidhya Govindan <vidhya.govindan@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/wl12xx/wl1271_ps.c b/drivers/net/wireless/wl12xx/wl1271_ps.c
index 1dc74b0..0f6ea16 100644
--- a/drivers/net/wireless/wl12xx/wl1271_ps.c
+++ b/drivers/net/wireless/wl12xx/wl1271_ps.c
@@ -27,25 +27,43 @@
#define WL1271_WAKEUP_TIMEOUT 500
+void wl1271_elp_work(struct work_struct *work)
+{
+ struct delayed_work *dwork;
+ struct wl1271 *wl;
+
+ dwork = container_of(work, struct delayed_work, work);
+ wl = container_of(dwork, struct wl1271, elp_work);
+
+ wl1271_debug(DEBUG_PSM, "elp work");
+
+ mutex_lock(&wl->mutex);
+
+ /*
+ * FIXME: below, by means of the "true", ELP has been disabled for now
+ * to work around a firmware bug. To be enabled upon receiving a new
+ * firmware version.
+ */
+ if (true || wl->elp || !wl->psm)
+ goto out;
+
+ wl1271_debug(DEBUG_PSM, "chip to elp");
+ wl1271_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
+ wl->elp = true;
+
+out:
+ mutex_unlock(&wl->mutex);
+}
+
+#define ELP_ENTRY_DELAY 5
+
/* Routines to toggle sleep mode while in ELP */
void wl1271_ps_elp_sleep(struct wl1271 *wl)
{
- /*
- * FIXME: due to a problem in the firmware (causing a firmware
- * crash), ELP entry is prevented below. Remove the "true" to
- * re-enable ELP entry.
- */
- if (true || wl->elp || !wl->psm)
- return;
-
- /*
- * Go to ELP unless there is work already pending - pending work
- * will immediately wakeup the chipset anyway.
- */
- if (!work_pending(&wl->irq_work) && !work_pending(&wl->tx_work)) {
- wl1271_debug(DEBUG_PSM, "chip to elp");
- wl1271_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
- wl->elp = true;
+ if (wl->psm) {
+ cancel_delayed_work(&wl->elp_work);
+ ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
+ msecs_to_jiffies(ELP_ENTRY_DELAY));
}
}