X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fnet%2Fwireless%2Fti%2Fwl1251%2Fps.c;fp=kernel%2Fdrivers%2Fnet%2Fwireless%2Fti%2Fwl1251%2Fps.c;h=b9e27b98bbc928ac2c7eb7dd9e48053c87ef60bf;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git

diff --git a/kernel/drivers/net/wireless/ti/wl1251/ps.c b/kernel/drivers/net/wireless/ti/wl1251/ps.c
new file mode 100644
index 000000000..b9e27b98b
--- /dev/null
+++ b/kernel/drivers/net/wireless/ti/wl1251/ps.c
@@ -0,0 +1,184 @@
+/*
+ * This file is part of wl1251
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * 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 "cmd.h"
+#include "io.h"
+
+/* in ms */
+#define WL1251_WAKEUP_TIMEOUT 100
+
+void wl1251_elp_work(struct work_struct *work)
+{
+	struct delayed_work *dwork;
+	struct wl1251 *wl;
+
+	dwork = container_of(work, struct delayed_work, work);
+	wl = container_of(dwork, struct wl1251, elp_work);
+
+	wl1251_debug(DEBUG_PSM, "elp work");
+
+	mutex_lock(&wl->mutex);
+
+	if (wl->elp || wl->station_mode == STATION_ACTIVE_MODE)
+		goto out;
+
+	wl1251_debug(DEBUG_PSM, "chip to elp");
+	wl1251_write_elp(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 wl1251_ps_elp_sleep(struct wl1251 *wl)
+{
+	unsigned long delay;
+
+	if (wl->station_mode != STATION_ACTIVE_MODE) {
+		delay = msecs_to_jiffies(ELP_ENTRY_DELAY);
+		ieee80211_queue_delayed_work(wl->hw, &wl->elp_work, delay);
+	}
+}
+
+int wl1251_ps_elp_wakeup(struct wl1251 *wl)
+{
+	unsigned long timeout, start;
+	u32 elp_reg;
+
+	cancel_delayed_work(&wl->elp_work);
+
+	if (!wl->elp)
+		return 0;
+
+	wl1251_debug(DEBUG_PSM, "waking up chip from elp");
+
+	start = jiffies;
+	timeout = jiffies + msecs_to_jiffies(WL1251_WAKEUP_TIMEOUT);
+
+	wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
+
+	elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
+
+	/*
+	 * FIXME: we should wait for irq from chip but, as a temporary
+	 * solution to simplify locking, let's poll instead
+	 */
+	while (!(elp_reg & ELPCTRL_WLAN_READY)) {
+		if (time_after(jiffies, timeout)) {
+			wl1251_error("elp wakeup timeout");
+			return -ETIMEDOUT;
+		}
+		msleep(1);
+		elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
+	}
+
+	wl1251_debug(DEBUG_PSM, "wakeup time: %u ms",
+		     jiffies_to_msecs(jiffies - start));
+
+	wl->elp = false;
+
+	return 0;
+}
+
+int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_station_mode mode)
+{
+	int ret;
+
+	switch (mode) {
+	case STATION_POWER_SAVE_MODE:
+		wl1251_debug(DEBUG_PSM, "entering psm");
+
+		/* enable beacon filtering */
+		ret = wl1251_acx_beacon_filter_opt(wl, true);
+		if (ret < 0)
+			return ret;
+
+		ret = wl1251_acx_wake_up_conditions(wl,
+						    WAKE_UP_EVENT_DTIM_BITMAP,
+						    wl->listen_int);
+		if (ret < 0)
+			return ret;
+
+		ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_ENABLE,
+					    WL1251_DEFAULT_BET_CONSECUTIVE);
+		if (ret < 0)
+			return ret;
+
+		ret = wl1251_cmd_ps_mode(wl, CHIP_POWER_SAVE_MODE);
+		if (ret < 0)
+			return ret;
+
+		ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
+		if (ret < 0)
+			return ret;
+		break;
+	case STATION_IDLE:
+		wl1251_debug(DEBUG_PSM, "entering idle");
+
+		ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
+		if (ret < 0)
+			return ret;
+
+		ret = wl1251_cmd_template_set(wl, CMD_DISCONNECT, NULL, 0);
+		if (ret < 0)
+			return ret;
+		break;
+	case STATION_ACTIVE_MODE:
+	default:
+		wl1251_debug(DEBUG_PSM, "leaving psm");
+
+		ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_CAM);
+		if (ret < 0)
+			return ret;
+
+		/* disable BET */
+		ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_DISABLE,
+					    WL1251_DEFAULT_BET_CONSECUTIVE);
+		if (ret < 0)
+			return ret;
+
+		/* disable beacon filtering */
+		ret = wl1251_acx_beacon_filter_opt(wl, false);
+		if (ret < 0)
+			return ret;
+
+		ret = wl1251_acx_wake_up_conditions(wl,
+						    WAKE_UP_EVENT_DTIM_BITMAP,
+						    wl->listen_int);
+		if (ret < 0)
+			return ret;
+
+		ret = wl1251_cmd_ps_mode(wl, CHIP_ACTIVE_MODE);
+		if (ret < 0)
+			return ret;
+
+		break;
+	}
+	wl->station_mode = mode;
+
+	return ret;
+}
+