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From fa9b7fc2e662e086a7c0e045e541f773bf34c555 Mon Sep 17 00:00:00 2001
From: Ivo van Doorn <IvDoorn@gmail.com>
Date: Sat, 10 Jan 2009 14:31:00 +0100
Subject: [PATCH] rt2x00: Add powersaving support (rt2800usb)
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
---
drivers/net/wireless/rt2x00/rt2800usb.c | 36 ++++++++++++++++++++++++++++++-
1 files changed, 35 insertions(+), 1 deletions(-)
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -860,6 +860,36 @@ static void rt2800usb_config_duration(st
rt2x00usb_register_write(rt2x00dev, BCN_TIME_CFG, reg);
}
+static void rt2800usb_config_ps(struct rt2x00_dev *rt2x00dev,
+ struct rt2x00lib_conf *libconf)
+{
+ enum dev_state state =
+ (libconf->conf->flags & IEEE80211_CONF_PS) ?
+ STATE_SLEEP : STATE_AWAKE;
+ u32 reg;
+
+ if (state == STATE_SLEEP) {
+ rt2x00usb_register_write(rt2x00dev, AUTOWAKEUP_CFG, 0);
+
+ rt2x00usb_register_read(rt2x00dev, AUTOWAKEUP_CFG, ®);
+ rt2x00_set_field32(®, AUTOWAKEUP_CFG_AUTO_LEAD_TIME, 5);
+ rt2x00_set_field32(®, AUTOWAKEUP_CFG_TBCN_BEFORE_WAKE,
+ libconf->conf->listen_interval - 1);
+ rt2x00_set_field32(®, AUTOWAKEUP_CFG_AUTOWAKE, 1);
+ rt2x00usb_register_write(rt2x00dev, AUTOWAKEUP_CFG, reg);
+
+ rt2800usb_mcu_request(rt2x00dev, MCU_SLEEP, 0xff, 0, 0);
+ } else {
+ rt2800usb_mcu_request(rt2x00dev, MCU_WAKEUP, 0xff, 0, 0);
+
+ rt2x00usb_register_read(rt2x00dev, AUTOWAKEUP_CFG, ®);
+ rt2x00_set_field32(®, AUTOWAKEUP_CFG_AUTO_LEAD_TIME, 0);
+ rt2x00_set_field32(®, AUTOWAKEUP_CFG_TBCN_BEFORE_WAKE, 0);
+ rt2x00_set_field32(®, AUTOWAKEUP_CFG_AUTOWAKE, 0);
+ rt2x00usb_register_write(rt2x00dev, AUTOWAKEUP_CFG, reg);
+ }
+}
+
static void rt2800usb_config(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf,
const unsigned int flags)
@@ -876,6 +906,8 @@ static void rt2800usb_config(struct rt2x
rt2800usb_config_retry_limit(rt2x00dev, libconf);
if (flags & IEEE80211_CONF_CHANGE_BEACON_INTERVAL)
rt2800usb_config_duration(rt2x00dev, libconf);
+ if (flags & IEEE80211_CONF_CHANGE_PS)
+ rt2800usb_config_ps(rt2x00dev, libconf);
}
/*
@@ -2112,7 +2144,9 @@ static int rt2800usb_probe_hw_mode(struc
*/
rt2x00dev->hw->flags =
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
- IEEE80211_HW_SIGNAL_DBM;
+ IEEE80211_HW_SIGNAL_DBM |
+ IEEE80211_HW_SUPPORTS_PS |
+ IEEE80211_HW_PS_NULLFUNC_STACK;
rt2x00dev->hw->extra_tx_headroom = TXD_DESC_SIZE + TXINFO_DESC_SIZE;
SET_IEEE80211_DEV(rt2x00dev->hw, rt2x00dev->dev);
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