1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
8 * Purpose: Handles 802.11 power management functions
15 * PSvEnablePowerSaving - Enable Power Saving Mode
16 * PSvDiasblePowerSaving - Disable Power Saving Mode
17 * PSbConsiderPowerDown - Decide if we can Power Down
18 * PSvSendPSPOLL - Send PS-POLL packet
19 * PSbSendNullPacket - Send Null packet
20 * PSbIsNextTBTTWakeUp - Decide if we need to wake up at next Beacon
31 /*--------------------- Static Definitions -------------------------*/
33 /*--------------------- Static Classes ----------------------------*/
35 /*--------------------- Static Functions --------------------------*/
37 /*--------------------- Export Variables --------------------------*/
39 /*--------------------- Export Functions --------------------------*/
43 * Routine Description:
44 * Enable hw power saving functions
53 struct vnt_private *priv,
54 unsigned short wListenInterval
57 u16 wAID = priv->current_aid | BIT(14) | BIT(15);
59 /* set period of power up before TBTT */
60 VNSvOutPortW(priv->PortOffset + MAC_REG_PWBT, C_PWBT);
61 if (priv->op_mode != NL80211_IFTYPE_ADHOC) {
63 VNSvOutPortW(priv->PortOffset + MAC_REG_AIDATIM, wAID);
66 #if 0 /* TODO atim window */
67 MACvWriteATIMW(priv->PortOffset, pMgmt->wCurrATIMWindow);
71 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
73 MACvRegBitsOn(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
75 if (wListenInterval >= 2) {
76 /* clear always listen beacon */
77 MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
78 /* first time set listen next beacon */
79 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
81 /* always listen beacon */
82 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
85 /* enable power saving hw function */
86 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
87 priv->bEnablePSMode = true;
89 priv->bPWBitOn = true;
90 pr_debug("PS:Power Saving Mode Enable...\n");
95 * Routine Description:
96 * Disable hw power saving functions
104 PSvDisablePowerSaving(
105 struct vnt_private *priv
108 /* disable power saving hw function */
110 /* clear AutoSleep */
111 MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
113 MACvRegBitsOff(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
114 /* set always listen beacon */
115 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
117 priv->bEnablePSMode = false;
119 priv->bPWBitOn = false;
124 * Routine Description:
125 * Check if Next TBTT must wake up
134 struct vnt_private *priv
137 struct ieee80211_hw *hw = priv->hw;
138 struct ieee80211_conf *conf = &hw->conf;
139 bool wake_up = false;
141 if (conf->listen_interval > 1) {
142 if (!priv->wake_up_count)
143 priv->wake_up_count = conf->listen_interval;
145 --priv->wake_up_count;
147 if (priv->wake_up_count == 1) {
148 /* Turn on wake up to listen next beacon */
149 MACvRegBitsOn(priv->PortOffset,
150 MAC_REG_PSCTL, PSCTL_LNBCN);