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
166
|
/*
* This file is part of wl1271
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include "wl1271_reg.h"
#include "wl1271_ps.h"
#include "wl1271_io.h"
#define WL1271_WAKEUP_TIMEOUT 500
void wl1271_elp_work(struct work_struct *work)
{
struct delayed_work *dwork;
struct wl1271 *wl;
dwork = container_of(work, struct delayed_work, work);
wl = container_of(dwork, struct wl1271, elp_work);
wl1271_debug(DEBUG_PSM, "elp work");
mutex_lock(&wl->mutex);
if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags) ||
(!test_bit(WL1271_FLAG_PSM, &wl->flags) &&
!test_bit(WL1271_FLAG_IDLE, &wl->flags)))
goto out;
wl1271_debug(DEBUG_PSM, "chip to elp");
wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
out:
mutex_unlock(&wl->mutex);
}
#define ELP_ENTRY_DELAY 5
/* Routines to toggle sleep mode while in ELP */
void wl1271_ps_elp_sleep(struct wl1271 *wl)
{
if (test_bit(WL1271_FLAG_PSM, &wl->flags) ||
test_bit(WL1271_FLAG_IDLE, &wl->flags)) {
cancel_delayed_work(&wl->elp_work);
ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
msecs_to_jiffies(ELP_ENTRY_DELAY));
}
}
int wl1271_ps_elp_wakeup(struct wl1271 *wl, bool chip_awake)
{
DECLARE_COMPLETION_ONSTACK(compl);
unsigned long flags;
int ret;
u32 start_time = jiffies;
bool pending = false;
if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
return 0;
wl1271_debug(DEBUG_PSM, "waking up chip from elp");
/*
* The spinlock is required here to synchronize both the work and
* the completion variable in one entity.
*/
spin_lock_irqsave(&wl->wl_lock, flags);
if (work_pending(&wl->irq_work) || chip_awake)
pending = true;
else
wl->elp_compl = &compl;
spin_unlock_irqrestore(&wl->wl_lock, flags);
wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
if (!pending) {
ret = wait_for_completion_timeout(
&compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
if (ret == 0) {
wl1271_error("ELP wakeup timeout!");
ret = -ETIMEDOUT;
goto err;
} else if (ret < 0) {
wl1271_error("ELP wakeup completion error.");
goto err;
}
}
clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
jiffies_to_msecs(jiffies - start_time));
goto out;
err:
spin_lock_irqsave(&wl->wl_lock, flags);
wl->elp_compl = NULL;
spin_unlock_irqrestore(&wl->wl_lock, flags);
return ret;
out:
return 0;
}
int wl1271_ps_set_mode(struct wl1271 *wl, enum wl1271_cmd_ps_mode mode,
bool send)
{
int ret;
switch (mode) {
case STATION_POWER_SAVE_MODE:
wl1271_debug(DEBUG_PSM, "entering psm");
ret = wl1271_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE, send);
if (ret < 0)
return ret;
set_bit(WL1271_FLAG_PSM, &wl->flags);
break;
case STATION_ACTIVE_MODE:
default:
wl1271_debug(DEBUG_PSM, "leaving psm");
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
return ret;
/* disable beacon early termination */
ret = wl1271_acx_bet_enable(wl, false);
if (ret < 0)
return ret;
/* disable beacon filtering */
ret = wl1271_acx_beacon_filter_opt(wl, false);
if (ret < 0)
return ret;
ret = wl1271_cmd_ps_mode(wl, STATION_ACTIVE_MODE, send);
if (ret < 0)
return ret;
clear_bit(WL1271_FLAG_PSM, &wl->flags);
break;
}
return ret;
}
|
