power.c
3.92 KB
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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
* 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:
* 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 */
VNSvOutPortW(priv->PortOffset + MAC_REG_PWBT, C_PWBT);
if (priv->op_mode != NL80211_IFTYPE_ADHOC) {
/* set AID */
VNSvOutPortW(priv->PortOffset + MAC_REG_AIDATIM, wAID);
} else {
/* set ATIM Window */
#if 0 /* TODO atim window */
MACvWriteATIMW(priv->PortOffset, pMgmt->wCurrATIMWindow);
#endif
}
/* Set AutoSleep */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
/* Set HWUTSF */
MACvRegBitsOn(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
if (wListenInterval >= 2) {
/* clear always listen beacon */
MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
/* first time set listen next beacon */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
} else {
/* always listen beacon */
MACvRegBitsOn(priv->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
}
/* enable power saving hw function */
MACvRegBitsOn(priv->PortOffset, 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 */
MACvRegBitsOff(priv->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
/* clear HWUTSF */
MACvRegBitsOff(priv->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
/* set always listen beacon */
MACvRegBitsOn(priv->PortOffset, 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 */
MACvRegBitsOn(priv->PortOffset,
MAC_REG_PSCTL, PSCTL_LNBCN);
wake_up = true;
}
}
return wake_up;
}