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staging: vt6656: refactor power save operation

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At present the power save wake uses the listening interval and
the slow path to wake up.

The following using a beacon interval of 100 and
listen interval of 5.

The TBTT set at 100 wake-up sequence;
100 TBTT wake-up set to listen interval.
200 TBTT
300 TBTT
400 TBTT --> call vnt_next_tbtt_wakeup on slow path
	Beacon heard and passed through at the approx 500 interval.
500 TBTT
600 TBTT wake-up set to listen interval

The TBTT set at 500 wake-up sequence and always listen flagged on;
100 No TBTT
200 No TBTT
300 No TBTT
400 No TBTT
500 TBTT - beacon heard and passed through
600 No TBTT

A further enhancement because the TBTT is more precise
the dtim_period can be used instead.

When Power save is off the TBTT continues to run at the listen
interval but all the other beacons are passed.

The code in vnt_int_process_data is no longer required.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Link: https://lore.kernel.org/r/5a188bd8-7049-8063-f24d-96768ce9a6ed@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Malcolm Priestley 2020-05-02 12:20:13 +01:00 committed by Greg Kroah-Hartman
parent 986da7debb
commit d95c8695e0
4 changed files with 11 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/staging/vt6656/device.h
View file

@ -383,8 +383,6 @@ struct vnt_private {
u8 bb_pre_ed_rssi;
u8 bb_pre_ed_index;
u16 wake_up_count;
/* command timer */
struct delayed_work run_command_work;

11
drivers/staging/vt6656/main_usb.c
View file

@ -824,10 +824,17 @@ static void vnt_bss_info_changed(struct ieee80211_hw *hw,
if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
priv->op_mode != NL80211_IFTYPE_AP) {
if (conf->assoc && conf->beacon_rate) {
u16 ps_beacon_int = conf->beacon_int;
if (conf->dtim_period)
ps_beacon_int *= conf->dtim_period;
else if (hw->conf.listen_interval)
ps_beacon_int *= hw->conf.listen_interval;
vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL,
TFTCTL_TSFCNTREN);
vnt_mac_set_beacon_interval(priv, conf->beacon_int);
vnt_mac_set_beacon_interval(priv, ps_beacon_int);
vnt_reset_next_tbtt(priv, conf->beacon_int);
@ -835,7 +842,7 @@ static void vnt_bss_info_changed(struct ieee80211_hw *hw,
conf->sync_tsf, priv->current_tsf);
vnt_update_next_tbtt(priv,
conf->sync_tsf, conf->beacon_int);
conf->sync_tsf, ps_beacon_int);
} else {
vnt_clear_current_tsf(priv);

8
drivers/staging/vt6656/power.c
View file

@ -63,16 +63,8 @@ void vnt_enable_power_saving(struct vnt_private *priv, u16 listen_interval)
*/
vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_GO2DOZE);
if (listen_interval >= 2) {
/* clear always listen beacon */
vnt_mac_reg_bits_off(priv, MAC_REG_PSCTL, PSCTL_ALBCN);
/* first time set listen next beacon */
vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_LNBCN);
} else {
/* always listen beacon */
vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_ALBCN);
}
dev_dbg(&priv->usb->dev, "PS:Power Saving Mode Enable...\n");
}

13
drivers/staging/vt6656/usbpipe.c
View file

@ -202,19 +202,6 @@ static void vnt_int_process_data(struct vnt_private *priv)
if (int_data->isr0 & ISR_BNTX && priv->op_mode == NL80211_IFTYPE_AP)
vnt_schedule_command(priv, WLAN_CMD_BECON_SEND);
if (int_data->isr0 & ISR_TBTT &&
priv->hw->conf.flags & IEEE80211_CONF_PS) {
if (!priv->wake_up_count)
priv->wake_up_count = priv->hw->conf.listen_interval;
if (priv->wake_up_count)
--priv->wake_up_count;
/* Turn on wake up to listen next beacon */
if (priv->wake_up_count == 1)
vnt_schedule_command(priv, WLAN_CMD_TBTT_WAKEUP);
}
priv->current_tsf = le64_to_cpu(int_data->tsf);
low_stats->dot11RTSSuccessCount += int_data->rts_success;