mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-06 02:50:43 +00:00
d95c8695e0
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>
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* File: power.c
|
|
*
|
|
* Purpose: Handles 802.11 power management functions
|
|
*
|
|
* Author: Lyndon Chen
|
|
*
|
|
* Date: July 17, 2002
|
|
*
|
|
* Functions:
|
|
* vnt_enable_power_saving - Enable Power Saving Mode
|
|
* PSvDiasblePowerSaving - Disable Power Saving Mode
|
|
* vnt_next_tbtt_wakeup - Decide if we need to wake up at next Beacon
|
|
*
|
|
* Revision History:
|
|
*
|
|
*/
|
|
|
|
#include "mac.h"
|
|
#include "device.h"
|
|
#include "power.h"
|
|
#include "wcmd.h"
|
|
#include "rxtx.h"
|
|
#include "card.h"
|
|
#include "usbpipe.h"
|
|
|
|
/*
|
|
*
|
|
* Routine Description:
|
|
* Enable hw power saving functions
|
|
*
|
|
* Return Value:
|
|
* None.
|
|
*
|
|
*/
|
|
|
|
void vnt_enable_power_saving(struct vnt_private *priv, u16 listen_interval)
|
|
{
|
|
u16 aid = priv->current_aid | BIT(14) | BIT(15);
|
|
|
|
/* set period of power up before TBTT */
|
|
vnt_mac_write_word(priv, MAC_REG_PWBT, C_PWBT);
|
|
|
|
if (priv->op_mode != NL80211_IFTYPE_ADHOC)
|
|
/* set AID */
|
|
vnt_mac_write_word(priv, MAC_REG_AIDATIM, aid);
|
|
|
|
/* Warren:06-18-2004,the sequence must follow
|
|
* PSEN->AUTOSLEEP->GO2DOZE
|
|
*/
|
|
/* enable power saving hw function */
|
|
vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_PSEN);
|
|
|
|
/* Set AutoSleep */
|
|
vnt_mac_reg_bits_on(priv, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
|
|
|
|
/* Warren:MUST turn on this once before turn on AUTOSLEEP ,or the
|
|
* AUTOSLEEP doesn't work
|
|
*/
|
|
vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_GO2DOZE);
|
|
|
|
/* 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");
|
|
}
|
|
|
|
int vnt_disable_power_saving(struct vnt_private *priv)
|
|
{
|
|
int ret;
|
|
|
|
/* disable power saving hw function */
|
|
ret = vnt_control_out(priv, MESSAGE_TYPE_DISABLE_PS, 0,
|
|
0, 0, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* clear AutoSleep */
|
|
vnt_mac_reg_bits_off(priv, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
|
|
|
|
/* set always listen beacon */
|
|
vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_ALBCN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* Routine Description:
|
|
* Check if Next TBTT must wake up
|
|
*
|
|
* Return Value:
|
|
* None.
|
|
*
|
|
*/
|
|
|
|
int vnt_next_tbtt_wakeup(struct vnt_private *priv)
|
|
{
|
|
struct ieee80211_hw *hw = priv->hw;
|
|
struct ieee80211_conf *conf = &hw->conf;
|
|
int wake_up = false;
|
|
|
|
if (conf->listen_interval > 1) {
|
|
/* Turn on wake up to listen next beacon */
|
|
vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_LNBCN);
|
|
wake_up = true;
|
|
}
|
|
|
|
return wake_up;
|
|
}
|