| /* |
| * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * |
| * File: power.c |
| * |
| * Purpose: Handles 802.11 power management functions |
| * |
| * Author: Lyndon Chen |
| * |
| * Date: July 17, 2002 |
| * |
| * Functions: |
| * vnt_enable_power_saving - Enable Power Saving Mode |
| * PSvDiasblePowerSaving - Disable Power Saving Mode |
| * vnt_next_tbtt_wakeup - Decide if we need to wake up at next Beacon |
| * |
| * Revision History: |
| * |
| */ |
| |
| #include "mac.h" |
| #include "device.h" |
| #include "power.h" |
| #include "wcmd.h" |
| #include "rxtx.h" |
| #include "card.h" |
| #include "usbpipe.h" |
| |
| /* |
| * |
| * Routine Description: |
| * Enable hw power saving functions |
| * |
| * Return Value: |
| * None. |
| * |
| */ |
| |
| void vnt_enable_power_saving(struct vnt_private *priv, u16 listen_interval) |
| { |
| u16 aid = priv->current_aid | BIT(14) | BIT(15); |
| |
| /* set period of power up before TBTT */ |
| vnt_mac_write_word(priv, MAC_REG_PWBT, C_PWBT); |
| |
| if (priv->op_mode != NL80211_IFTYPE_ADHOC) |
| /* set AID */ |
| vnt_mac_write_word(priv, MAC_REG_AIDATIM, aid); |
| |
| /* Warren:06-18-2004,the sequence must follow |
| * PSEN->AUTOSLEEP->GO2DOZE |
| */ |
| /* enable power saving hw function */ |
| vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_PSEN); |
| |
| /* Set AutoSleep */ |
| vnt_mac_reg_bits_on(priv, MAC_REG_PSCFG, PSCFG_AUTOSLEEP); |
| |
| /* Warren:MUST turn on this once before turn on AUTOSLEEP ,or the |
| * AUTOSLEEP doesn't work |
| */ |
| vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_GO2DOZE); |
| |
| if (listen_interval >= 2) { |
| /* clear always listen beacon */ |
| vnt_mac_reg_bits_off(priv, MAC_REG_PSCTL, PSCTL_ALBCN); |
| |
| /* first time set listen next beacon */ |
| vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_LNBCN); |
| } else { |
| /* always listen beacon */ |
| vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_ALBCN); |
| } |
| |
| dev_dbg(&priv->usb->dev, "PS:Power Saving Mode Enable...\n"); |
| } |
| |
| /* |
| * |
| * Routine Description: |
| * Disable hw power saving functions |
| * |
| * Return Value: |
| * None. |
| * |
| */ |
| |
| void vnt_disable_power_saving(struct vnt_private *priv) |
| { |
| /* disable power saving hw function */ |
| vnt_control_out(priv, MESSAGE_TYPE_DISABLE_PS, 0, |
| 0, 0, NULL); |
| |
| /* clear AutoSleep */ |
| vnt_mac_reg_bits_off(priv, MAC_REG_PSCFG, PSCFG_AUTOSLEEP); |
| |
| /* set always listen beacon */ |
| vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_ALBCN); |
| } |
| |
| /* |
| * |
| * Routine Description: |
| * Check if Next TBTT must wake up |
| * |
| * Return Value: |
| * None. |
| * |
| */ |
| |
| int vnt_next_tbtt_wakeup(struct vnt_private *priv) |
| { |
| struct ieee80211_hw *hw = priv->hw; |
| struct ieee80211_conf *conf = &hw->conf; |
| int wake_up = false; |
| |
| if (conf->listen_interval > 1) { |
| /* Turn on wake up to listen next beacon */ |
| vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_LNBCN); |
| wake_up = true; |
| } |
| |
| return wake_up; |
| } |