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