From ccb56baff992d682cc84eca10472298b2cce1bf1 Mon Sep 17 00:00:00 2001 From: Jarkko Nikula Date: Mon, 4 Apr 2011 11:04:58 +0300 Subject: [PATCH] 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 Acked-by: Kalle Valo Signed-off-by: John W. Linville --- drivers/net/wireless/wl12xx/wl1251.h | 1 + drivers/net/wireless/wl12xx/wl1251_main.c | 16 ++++++++++++++++ drivers/net/wireless/wl12xx/wl1251_ps.c | 11 +++++++++++ 3 files changed, 28 insertions(+) diff --git a/drivers/net/wireless/wl12xx/wl1251.h b/drivers/net/wireless/wl12xx/wl1251.h index bdf6a76..c2bbbfd 100644 --- a/drivers/net/wireless/wl12xx/wl1251.h +++ b/drivers/net/wireless/wl12xx/wl1251.h @@ -135,6 +135,7 @@ enum wl1251_partition_type { enum wl1251_station_mode { STATION_ACTIVE_MODE, STATION_POWER_SAVE_MODE, + STATION_IDLE, }; struct wl1251_partition { diff --git a/drivers/net/wireless/wl12xx/wl1251_main.c b/drivers/net/wireless/wl12xx/wl1251_main.c index 8ca7901..4ac24c5 100644 --- a/drivers/net/wireless/wl12xx/wl1251_main.c +++ b/drivers/net/wireless/wl12xx/wl1251_main.c @@ -692,6 +692,22 @@ 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/wl12xx/wl1251_ps.c b/drivers/net/wireless/wl12xx/wl1251_ps.c index 7f14467..7b56810 100644 --- a/drivers/net/wireless/wl12xx/wl1251_ps.c +++ b/drivers/net/wireless/wl12xx/wl1251_ps.c @@ -151,6 +151,17 @@ 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"); -- 2.39.2