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authorIvo van Doorn <ivdoorn@gmail.com>2008-12-20 10:52:42 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-01-29 21:58:34 +0100
commit7d7f19ccb777946df0a8fb7c83189ba2ae08b02e (patch)
tree38fcea85510a4945283cf23bc029261b3941fc74 /drivers/net/wireless/rt2x00/rt2500pci.c
parentb43: Use 64bit atomic register access for TSF (diff)
downloadlinux-7d7f19ccb777946df0a8fb7c83189ba2ae08b02e.tar.xz
linux-7d7f19ccb777946df0a8fb7c83189ba2ae08b02e.zip
rt2x00: Implement Powersaving
Listen to IEEE80211_CONF_PS to determine if the device should drop into powersaving mode. This feature depends on the dynamic power save functionality in mac80211. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2500pci.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt2500pci.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c
index d3bc218ec85c..bf5e81162f25 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -573,6 +573,32 @@ static void rt2500pci_config_duration(struct rt2x00_dev *rt2x00dev,
rt2x00pci_register_write(rt2x00dev, CSR12, reg);
}
+static void rt2500pci_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) {
+ rt2x00pci_register_read(rt2x00dev, CSR20, &reg);
+ rt2x00_set_field32(&reg, CSR20_DELAY_AFTER_TBCN,
+ (libconf->conf->beacon_int - 20) * 16);
+ rt2x00_set_field32(&reg, CSR20_TBCN_BEFORE_WAKEUP,
+ libconf->conf->listen_interval - 1);
+
+ /* We must first disable autowake before it can be enabled */
+ rt2x00_set_field32(&reg, CSR20_AUTOWAKE, 0);
+ rt2x00pci_register_write(rt2x00dev, CSR20, reg);
+
+ rt2x00_set_field32(&reg, CSR20_AUTOWAKE, 1);
+ rt2x00pci_register_write(rt2x00dev, CSR20, reg);
+ }
+
+ rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
+}
+
static void rt2500pci_config(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf,
const unsigned int flags)
@@ -588,6 +614,8 @@ static void rt2500pci_config(struct rt2x00_dev *rt2x00dev,
rt2500pci_config_retry_limit(rt2x00dev, libconf);
if (flags & IEEE80211_CONF_CHANGE_BEACON_INTERVAL)
rt2500pci_config_duration(rt2x00dev, libconf);
+ if (flags & IEEE80211_CONF_CHANGE_PS)
+ rt2500pci_config_ps(rt2x00dev, libconf);
}
/*