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
51 void PSvEnablePowerSaving(struct vnt_private *priv,
52 unsigned short wListenInterval)
54 u16 wAID = priv->current_aid | BIT(14) | BIT(15);
56 /* set period of power up before TBTT */
57 VNSvOutPortW(priv->PortOffset + MAC_REG_PWBT, C_PWBT);
58 if (priv->op_mode != NL80211_IFTYPE_ADHOC) {
60 VNSvOutPortW(priv->PortOffset + MAC_REG_AIDATIM, wAID);
63 #if 0 /* TODO atim window */
64 MACvWriteATIMW(priv->PortOffset, pMgmt->wCurrATIMWindow);
68 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
70 MACvRegBitsOn(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
72 if (wListenInterval >= 2) {
73 /* clear always listen beacon */
74 MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
75 /* first time set listen next beacon */
76 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
78 /* always listen beacon */
79 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
82 /* enable power saving hw function */
83 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
84 priv->bEnablePSMode = true;
86 priv->bPWBitOn = true;
87 pr_debug("PS:Power Saving Mode Enable...\n");
92 * Routine Description:
93 * Disable hw power saving functions
100 void PSvDisablePowerSaving(struct vnt_private *priv)
102 /* disable power saving hw function */
104 /* clear AutoSleep */
105 MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
107 MACvRegBitsOff(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
108 /* set always listen beacon */
109 MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
111 priv->bEnablePSMode = false;
113 priv->bPWBitOn = false;
118 * Routine Description:
119 * Check if Next TBTT must wake up
126 bool PSbIsNextTBTTWakeUp(struct vnt_private *priv)
128 struct ieee80211_hw *hw = priv->hw;
129 struct ieee80211_conf *conf = &hw->conf;
130 bool wake_up = false;
132 if (conf->listen_interval > 1) {
133 if (!priv->wake_up_count)
134 priv->wake_up_count = conf->listen_interval;
136 --priv->wake_up_count;
138 if (priv->wake_up_count == 1) {
139 /* Turn on wake up to listen next beacon */
140 MACvRegBitsOn(priv->PortOffset,
141 MAC_REG_PSCTL, PSCTL_LNBCN);