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authorJarkko Nikula <jhnikula@gmail.com>2011-04-04 11:04:58 +0300
committerJohn W. Linville <linville@tuxdriver.com>2011-04-07 15:34:14 -0400
commit1e5f52de216a32986a5c3cbc358dbb2620a03047 (patch)
treee5294e3a2f61bd49994ea730d9d63cb2aa128a84 /drivers/net/wireless/wl1251
parenta0bbb58bcb70295ff05f870c93d34f9fbe614204 (diff)
downloadlinux-stericsson-1e5f52de216a32986a5c3cbc358dbb2620a03047.tar.gz
wl1251: Add support for idle mode
On Nokia N900 the wl1251 consumes the most power when the interface is up but not associated to access point (that supports PSM). In terms of battery current consumption, the consumption is ~180 mA higher when the interface is up but not associated and only ~5 mA higher when associated compared to interface down and driver not loaded cases. This patch adds support for the mac80211 idle notifications. Chip is put into idle very much the same way when entering into PSM by utilizing the Extreme Low Power (ELP) mode. I.e. idle is entered by setting necessary conditions in wl1251_ps_set_mode followed by a call to wl1251_ps_elp_sleep. It seems it is just enough the authorize ELP mode followed by CMD_DISCONNECT (thanks to Kalle Valo about the idea to use it). Without disconnect command the chip remains somewhat active and stays consuming ~20 mA. Idle mode is left by same way than PSM. The wl1251_join call is used to revert the CMD_DISCONNECT. Without it association to AP doesn't work when trying second time. With this patch the interface up but not associated case the battery current consumption is less than 1 mA higher compared to interface down case. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Acked-by: Kalle Valo <kvalo@adurom.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/wl1251')
-rw-r--r--drivers/net/wireless/wl1251/main.c16
-rw-r--r--drivers/net/wireless/wl1251/ps.c11
-rw-r--r--drivers/net/wireless/wl1251/wl1251.h1
3 files changed, 28 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl1251/main.c b/drivers/net/wireless/wl1251/main.c
index 04a054915dbe..a14a48c99cdc 100644
--- a/drivers/net/wireless/wl1251/main.c
+++ b/drivers/net/wireless/wl1251/main.c
@@ -639,6 +639,22 @@ static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
}
}
+ if (changed & IEEE80211_CONF_CHANGE_IDLE) {
+ if (conf->flags & IEEE80211_CONF_IDLE) {
+ ret = wl1251_ps_set_mode(wl, STATION_IDLE);
+ if (ret < 0)
+ goto out_sleep;
+ } else {
+ ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
+ if (ret < 0)
+ goto out_sleep;
+ ret = wl1251_join(wl, wl->bss_type, wl->channel,
+ wl->beacon_int, wl->dtim_period);
+ if (ret < 0)
+ goto out_sleep;
+ }
+ }
+
if (conf->power_level != wl->power_level) {
ret = wl1251_acx_tx_power(wl, conf->power_level);
if (ret < 0)
diff --git a/drivers/net/wireless/wl1251/ps.c b/drivers/net/wireless/wl1251/ps.c
index 97a5b8c82f01..db719f7d2692 100644
--- a/drivers/net/wireless/wl1251/ps.c
+++ b/drivers/net/wireless/wl1251/ps.c
@@ -136,6 +136,17 @@ int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_station_mode mode)
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");
diff --git a/drivers/net/wireless/wl1251/wl1251.h b/drivers/net/wireless/wl1251/wl1251.h
index bf245a87e80e..a77f1bbbed0a 100644
--- a/drivers/net/wireless/wl1251/wl1251.h
+++ b/drivers/net/wireless/wl1251/wl1251.h
@@ -132,6 +132,7 @@ enum wl1251_partition_type {
enum wl1251_station_mode {
STATION_ACTIVE_MODE,
STATION_POWER_SAVE_MODE,
+ STATION_IDLE,
};
struct wl1251_partition {