dd41dab5d5
Now that the SPDX tag is in all vt6656 files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Forest Bond <forest@alittletooquiet.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
127 lines
2.7 KiB
C
127 lines
2.7 KiB
C
// 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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if (listen_interval >= 2) {
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/* clear always listen beacon */
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vnt_mac_reg_bits_off(priv, MAC_REG_PSCTL, PSCTL_ALBCN);
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/* first time set listen next beacon */
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vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_LNBCN);
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} else {
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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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}
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dev_dbg(&priv->usb->dev, "PS:Power Saving Mode Enable...\n");
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}
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/*
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*
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* Routine Description:
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* Disable 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_disable_power_saving(struct vnt_private *priv)
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{
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/* disable power saving hw function */
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vnt_control_out(priv, MESSAGE_TYPE_DISABLE_PS, 0,
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0, 0, NULL);
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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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}
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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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