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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. * All rights reserved. * * Purpose: Handles 802.11 power management functions * * Author: Lyndon Chen * * Date: July 17, 2002 * * Functions: * PSvEnablePowerSaving - Enable Power Saving Mode * PSvDiasblePowerSaving - Disable Power Saving Mode * PSbConsiderPowerDown - Decide if we can Power Down * PSvSendPSPOLL - Send PS-POLL packet * PSbSendNullPacket - Send Null packet * PSbIsNextTBTTWakeUp - Decide if we need to wake up at next Beacon * * Revision History: * */ #include "mac.h" #include "device.h" #include "power.h" #include "card.h" /*--------------------- Static Definitions -------------------------*/ /*--------------------- Static Classes ----------------------------*/ /*--------------------- Static Functions --------------------------*/ /*--------------------- Export Variables --------------------------*/ /*--------------------- Export Functions --------------------------*/ /* * * Routine Description: * Enable hw power saving functions * * Return Value: * None. * */ void PSvEnablePowerSaving(struct vnt_private *priv, unsigned short wListenInterval) { u16 wAID = priv->current_aid | BIT(14) | BIT(15); /* set period of power up before TBTT */ iowrite16(C_PWBT, priv->port_offset + MAC_REG_PWBT); if (priv->op_mode != NL80211_IFTYPE_ADHOC) { /* set AID */ iowrite16(wAID, priv->port_offset + MAC_REG_AIDATIM); } /* Set AutoSleep */ vt6655_mac_reg_bits_on(priv->port_offset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP); /* Set HWUTSF */ vt6655_mac_reg_bits_on(priv->port_offset, MAC_REG_TFTCTL, TFTCTL_HWUTSF); if (wListenInterval >= 2) { /* clear always listen beacon */ vt6655_mac_reg_bits_off(priv->port_offset, MAC_REG_PSCTL, PSCTL_ALBCN); /* first time set listen next beacon */ vt6655_mac_reg_bits_on(priv->port_offset, MAC_REG_PSCTL, PSCTL_LNBCN); } else { /* always listen beacon */ vt6655_mac_reg_bits_on(priv->port_offset, MAC_REG_PSCTL, PSCTL_ALBCN); } /* enable power saving hw function */ vt6655_mac_reg_bits_on(priv->port_offset, MAC_REG_PSCTL, PSCTL_PSEN); priv->bEnablePSMode = true; priv->bPWBitOn = true; pr_debug("PS:Power Saving Mode Enable...\n"); } /* * * Routine Description: * Disable hw power saving functions * * Return Value: * None. * */ void PSvDisablePowerSaving(struct vnt_private *priv) { /* disable power saving hw function */ MACbPSWakeup(priv); /* clear AutoSleep */ vt6655_mac_reg_bits_off(priv->port_offset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP); /* clear HWUTSF */ vt6655_mac_reg_bits_off(priv->port_offset, MAC_REG_TFTCTL, TFTCTL_HWUTSF); /* set always listen beacon */ vt6655_mac_reg_bits_on(priv->port_offset, MAC_REG_PSCTL, PSCTL_ALBCN); priv->bEnablePSMode = false; priv->bPWBitOn = false; } /* * * Routine Description: * Check if Next TBTT must wake up * * Return Value: * None. * */ bool PSbIsNextTBTTWakeUp(struct vnt_private *priv) { struct ieee80211_hw *hw = priv->hw; struct ieee80211_conf *conf = &hw->conf; bool wake_up = false; if (conf->listen_interval > 1) { if (!priv->wake_up_count) priv->wake_up_count = conf->listen_interval; --priv->wake_up_count; if (priv->wake_up_count == 1) { /* Turn on wake up to listen next beacon */ vt6655_mac_reg_bits_on(priv->port_offset, MAC_REG_PSCTL, PSCTL_LNBCN); wake_up = true; } } return wake_up; } |