aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/wl12xx/wl1251_ps.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_ps.c')
-rw-r--r--drivers/net/wireless/wl12xx/wl1251_ps.c196
1 files changed, 0 insertions, 196 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_ps.c b/drivers/net/wireless/wl12xx/wl1251_ps.c
deleted file mode 100644
index b55cb2bd459a..000000000000
--- a/drivers/net/wireless/wl12xx/wl1251_ps.c
+++ /dev/null
@@ -1,196 +0,0 @@
1/*
2 * This file is part of wl1251
3 *
4 * Copyright (C) 2008 Nokia Corporation
5 *
6 * Contact: Kalle Valo <kalle.valo@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24#include "wl1251_reg.h"
25#include "wl1251_ps.h"
26#include "wl1251_cmd.h"
27#include "wl1251_io.h"
28
29/* in ms */
30#define WL1251_WAKEUP_TIMEOUT 100
31
32void wl1251_elp_work(struct work_struct *work)
33{
34 struct delayed_work *dwork;
35 struct wl1251 *wl;
36
37 dwork = container_of(work, struct delayed_work, work);
38 wl = container_of(dwork, struct wl1251, elp_work);
39
40 wl1251_debug(DEBUG_PSM, "elp work");
41
42 mutex_lock(&wl->mutex);
43
44 if (wl->elp || !wl->psm)
45 goto out;
46
47 wl1251_debug(DEBUG_PSM, "chip to elp");
48 wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
49 wl->elp = true;
50
51out:
52 mutex_unlock(&wl->mutex);
53}
54
55#define ELP_ENTRY_DELAY 5
56
57/* Routines to toggle sleep mode while in ELP */
58void wl1251_ps_elp_sleep(struct wl1251 *wl)
59{
60 unsigned long delay;
61
62 if (wl->psm) {
63 cancel_delayed_work(&wl->elp_work);
64 delay = msecs_to_jiffies(ELP_ENTRY_DELAY);
65 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work, delay);
66 }
67}
68
69int wl1251_ps_elp_wakeup(struct wl1251 *wl)
70{
71 unsigned long timeout, start;
72 u32 elp_reg;
73
74 if (!wl->elp)
75 return 0;
76
77 wl1251_debug(DEBUG_PSM, "waking up chip from elp");
78
79 start = jiffies;
80 timeout = jiffies + msecs_to_jiffies(WL1251_WAKEUP_TIMEOUT);
81
82 wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
83
84 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
85
86 /*
87 * FIXME: we should wait for irq from chip but, as a temporary
88 * solution to simplify locking, let's poll instead
89 */
90 while (!(elp_reg & ELPCTRL_WLAN_READY)) {
91 if (time_after(jiffies, timeout)) {
92 wl1251_error("elp wakeup timeout");
93 return -ETIMEDOUT;
94 }
95 msleep(1);
96 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
97 }
98
99 wl1251_debug(DEBUG_PSM, "wakeup time: %u ms",
100 jiffies_to_msecs(jiffies - start));
101
102 wl->elp = false;
103
104 return 0;
105}
106
107static int wl1251_ps_set_elp(struct wl1251 *wl, bool enable)
108{
109 int ret;
110
111 if (enable) {
112 wl1251_debug(DEBUG_PSM, "sleep auth psm/elp");
113
114 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP);
115 if (ret < 0)
116 return ret;
117
118 wl1251_ps_elp_sleep(wl);
119 } else {
120 wl1251_debug(DEBUG_PSM, "sleep auth cam");
121
122 /*
123 * When the target is in ELP, we can only
124 * access the ELP control register. Thus,
125 * we have to wake the target up before
126 * changing the power authorization.
127 */
128
129 wl1251_ps_elp_wakeup(wl);
130
131 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_CAM);
132 if (ret < 0)
133 return ret;
134 }
135
136 return 0;
137}
138
139int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_cmd_ps_mode mode)
140{
141 int ret;
142
143 switch (mode) {
144 case STATION_POWER_SAVE_MODE:
145 wl1251_debug(DEBUG_PSM, "entering psm");
146
147 /* enable beacon filtering */
148 ret = wl1251_acx_beacon_filter_opt(wl, true);
149 if (ret < 0)
150 return ret;
151
152 ret = wl1251_acx_wake_up_conditions(wl,
153 WAKE_UP_EVENT_DTIM_BITMAP,
154 wl->listen_int);
155 if (ret < 0)
156 return ret;
157
158 ret = wl1251_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE);
159 if (ret < 0)
160 return ret;
161
162 ret = wl1251_ps_set_elp(wl, true);
163 if (ret < 0)
164 return ret;
165
166 wl->psm = 1;
167 break;
168 case STATION_ACTIVE_MODE:
169 default:
170 wl1251_debug(DEBUG_PSM, "leaving psm");
171 ret = wl1251_ps_set_elp(wl, false);
172 if (ret < 0)
173 return ret;
174
175 /* disable beacon filtering */
176 ret = wl1251_acx_beacon_filter_opt(wl, false);
177 if (ret < 0)
178 return ret;
179
180 ret = wl1251_acx_wake_up_conditions(wl,
181 WAKE_UP_EVENT_DTIM_BITMAP,
182 wl->listen_int);
183 if (ret < 0)
184 return ret;
185
186 ret = wl1251_cmd_ps_mode(wl, STATION_ACTIVE_MODE);
187 if (ret < 0)
188 return ret;
189
190 wl->psm = 0;
191 break;
192 }
193
194 return ret;
195}
196
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-10 13:42:42 -0400