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-rw-r--r--drivers/net/wireless/wl12xx/ps.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl12xx/ps.c b/drivers/net/wireless/wl12xx/ps.c
new file mode 100644
index 00000000000..60a3738eadb
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/ps.c
@@ -0,0 +1,178 @@
+/*
+ * This file is part of wl1271
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Contact: Luciano Coelho <luciano.coelho@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include "reg.h"
+#include "ps.h"
+#include "io.h"
+
+#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);
+
+ if (unlikely(wl->state == WL1271_STATE_OFF))
+ goto out;
+
+ if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags) ||
+ (!test_bit(WL1271_FLAG_PSM, &wl->flags) &&
+ !test_bit(WL1271_FLAG_IDLE, &wl->flags)))
+ goto out;
+
+ wl1271_debug(DEBUG_PSM, "chip to elp");
+ wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
+ set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
+
+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)
+{
+ if (test_bit(WL1271_FLAG_PSM, &wl->flags) ||
+ test_bit(WL1271_FLAG_IDLE, &wl->flags)) {
+ cancel_delayed_work(&wl->elp_work);
+ ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
+ msecs_to_jiffies(ELP_ENTRY_DELAY));
+ }
+}
+
+int wl1271_ps_elp_wakeup(struct wl1271 *wl, bool chip_awake)
+{
+ DECLARE_COMPLETION_ONSTACK(compl);
+ unsigned long flags;
+ int ret;
+ u32 start_time = jiffies;
+ bool pending = false;
+
+ if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
+ return 0;
+
+ wl1271_debug(DEBUG_PSM, "waking up chip from elp");
+
+ /*
+ * The spinlock is required here to synchronize both the work and
+ * the completion variable in one entity.
+ */
+ spin_lock_irqsave(&wl->wl_lock, flags);
+ if (work_pending(&wl->irq_work) || chip_awake)
+ pending = true;
+ else
+ wl->elp_compl = &compl;
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+
+ wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
+
+ if (!pending) {
+ ret = wait_for_completion_timeout(
+ &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
+ if (ret == 0) {
+ wl1271_error("ELP wakeup timeout!");
+ ieee80211_queue_work(wl->hw, &wl->recovery_work);
+ ret = -ETIMEDOUT;
+ goto err;
+ } else if (ret < 0) {
+ wl1271_error("ELP wakeup completion error.");
+ goto err;
+ }
+ }
+
+ clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
+
+ wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
+ jiffies_to_msecs(jiffies - start_time));
+ goto out;
+
+err:
+ spin_lock_irqsave(&wl->wl_lock, flags);
+ wl->elp_compl = NULL;
+ spin_unlock_irqrestore(&wl->wl_lock, flags);
+ return ret;
+
+out:
+ return 0;
+}
+
+int wl1271_ps_set_mode(struct wl1271 *wl, enum wl1271_cmd_ps_mode mode,
+ u32 rates, bool send)
+{
+ int ret;
+
+ switch (mode) {
+ case STATION_POWER_SAVE_MODE:
+ wl1271_debug(DEBUG_PSM, "entering psm");
+
+ ret = wl1271_acx_wake_up_conditions(wl);
+ if (ret < 0) {
+ wl1271_error("couldn't set wake up conditions");
+ return ret;
+ }
+
+ ret = wl1271_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE,
+ rates, send);
+ if (ret < 0)
+ return ret;
+
+ set_bit(WL1271_FLAG_PSM, &wl->flags);
+ break;
+ case STATION_ACTIVE_MODE:
+ default:
+ wl1271_debug(DEBUG_PSM, "leaving psm");
+ ret = wl1271_ps_elp_wakeup(wl, false);
+ if (ret < 0)
+ return ret;
+
+ /* disable beacon early termination */
+ ret = wl1271_acx_bet_enable(wl, false);
+ if (ret < 0)
+ return ret;
+
+ /* disable beacon filtering */
+ ret = wl1271_acx_beacon_filter_opt(wl, false);
+ if (ret < 0)
+ return ret;
+
+ ret = wl1271_cmd_ps_mode(wl, STATION_ACTIVE_MODE,
+ rates, send);
+ if (ret < 0)
+ return ret;
+
+ clear_bit(WL1271_FLAG_PSM, &wl->flags);
+ break;
+ }
+
+ return ret;
+}
+
+