1 /*
2 * This file is part of wl1251
3 *
4 * Copyright (c) 1998-2007 Texas Instruments Incorporated
5 * Copyright (C) 2008 Nokia Corporation
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19 * 02110-1301 USA
20 *
21 */
22
23 #include "wl1251.h"
24 #include "reg.h"
25 #include "io.h"
26 #include "event.h"
27 #include "ps.h"
28
wl1251_event_scan_complete(struct wl1251 * wl,struct event_mailbox * mbox)29 static int wl1251_event_scan_complete(struct wl1251 *wl,
30 struct event_mailbox *mbox)
31 {
32 int ret = 0;
33
34 wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
35 mbox->scheduled_scan_status,
36 mbox->scheduled_scan_channels);
37
38 if (wl->scanning) {
39 struct cfg80211_scan_info info = {
40 .aborted = false,
41 };
42
43 ieee80211_scan_completed(wl->hw, &info);
44 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
45 wl->scanning = false;
46 if (wl->hw->conf.flags & IEEE80211_CONF_IDLE)
47 ret = wl1251_ps_set_mode(wl, STATION_IDLE);
48 }
49
50 return ret;
51 }
52
53 #define WL1251_PSM_ENTRY_RETRIES 3
wl1251_event_ps_report(struct wl1251 * wl,struct event_mailbox * mbox)54 static int wl1251_event_ps_report(struct wl1251 *wl,
55 struct event_mailbox *mbox)
56 {
57 int ret = 0;
58
59 wl1251_debug(DEBUG_EVENT, "ps status: %x", mbox->ps_status);
60
61 switch (mbox->ps_status) {
62 case EVENT_ENTER_POWER_SAVE_FAIL:
63 wl1251_debug(DEBUG_PSM, "PSM entry failed");
64
65 if (wl->station_mode != STATION_POWER_SAVE_MODE) {
66 /* remain in active mode */
67 wl->psm_entry_retry = 0;
68 break;
69 }
70
71 if (wl->psm_entry_retry < WL1251_PSM_ENTRY_RETRIES) {
72 wl->psm_entry_retry++;
73 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
74 } else {
75 wl1251_error("Power save entry failed, giving up");
76 wl->psm_entry_retry = 0;
77 }
78 break;
79 case EVENT_ENTER_POWER_SAVE_SUCCESS:
80 case EVENT_EXIT_POWER_SAVE_FAIL:
81 case EVENT_EXIT_POWER_SAVE_SUCCESS:
82 default:
83 wl->psm_entry_retry = 0;
84 break;
85 }
86
87 return 0;
88 }
89
wl1251_event_mbox_dump(struct event_mailbox * mbox)90 static void wl1251_event_mbox_dump(struct event_mailbox *mbox)
91 {
92 wl1251_debug(DEBUG_EVENT, "MBOX DUMP:");
93 wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
94 wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
95 }
96
wl1251_event_process(struct wl1251 * wl,struct event_mailbox * mbox)97 static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox)
98 {
99 int ret;
100 u32 vector;
101
102 wl1251_event_mbox_dump(mbox);
103
104 vector = mbox->events_vector & ~(mbox->events_mask);
105 wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector);
106
107 if (vector & SCAN_COMPLETE_EVENT_ID) {
108 ret = wl1251_event_scan_complete(wl, mbox);
109 if (ret < 0)
110 return ret;
111 }
112
113 if (vector & BSS_LOSE_EVENT_ID) {
114 wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
115
116 if (wl->psm_requested &&
117 wl->station_mode != STATION_ACTIVE_MODE) {
118 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
119 if (ret < 0)
120 return ret;
121 }
122 }
123
124 if (vector & PS_REPORT_EVENT_ID) {
125 wl1251_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
126 ret = wl1251_event_ps_report(wl, mbox);
127 if (ret < 0)
128 return ret;
129 }
130
131 if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) {
132 wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT");
133
134 /* indicate to the stack, that beacons have been lost */
135 if (wl->vif && wl->vif->type == NL80211_IFTYPE_STATION)
136 ieee80211_beacon_loss(wl->vif);
137 }
138
139 if (vector & REGAINED_BSS_EVENT_ID) {
140 if (wl->psm_requested) {
141 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
142 if (ret < 0)
143 return ret;
144 }
145 }
146
147 if (wl->vif && wl->rssi_thold) {
148 if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) {
149 wl1251_debug(DEBUG_EVENT,
150 "ROAMING_TRIGGER_LOW_RSSI_EVENT");
151 ieee80211_cqm_rssi_notify(wl->vif,
152 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
153 0, GFP_KERNEL);
154 }
155
156 if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) {
157 wl1251_debug(DEBUG_EVENT,
158 "ROAMING_TRIGGER_REGAINED_RSSI_EVENT");
159 ieee80211_cqm_rssi_notify(wl->vif,
160 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
161 0, GFP_KERNEL);
162 }
163 }
164
165 return 0;
166 }
167
168 /*
169 * Poll the mailbox event field until any of the bits in the mask is set or a
170 * timeout occurs (WL1251_EVENT_TIMEOUT in msecs)
171 */
wl1251_event_wait(struct wl1251 * wl,u32 mask,int timeout_ms)172 int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms)
173 {
174 u32 events_vector, event;
175 unsigned long timeout;
176
177 timeout = jiffies + msecs_to_jiffies(timeout_ms);
178
179 do {
180 if (time_after(jiffies, timeout))
181 return -ETIMEDOUT;
182
183 msleep(1);
184
185 /* read from both event fields */
186 wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector,
187 sizeof(events_vector));
188 event = events_vector & mask;
189 wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector,
190 sizeof(events_vector));
191 event |= events_vector & mask;
192 } while (!event);
193
194 return 0;
195 }
196
wl1251_event_unmask(struct wl1251 * wl)197 int wl1251_event_unmask(struct wl1251 *wl)
198 {
199 int ret;
200
201 ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask));
202 if (ret < 0)
203 return ret;
204
205 return 0;
206 }
207
wl1251_event_mbox_config(struct wl1251 * wl)208 void wl1251_event_mbox_config(struct wl1251 *wl)
209 {
210 wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
211 wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
212
213 wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
214 wl->mbox_ptr[0], wl->mbox_ptr[1]);
215 }
216
wl1251_event_handle(struct wl1251 * wl,u8 mbox_num)217 int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num)
218 {
219 struct event_mailbox mbox;
220 int ret;
221
222 wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
223
224 if (mbox_num > 1)
225 return -EINVAL;
226
227 /* first we read the mbox descriptor */
228 wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
229 sizeof(struct event_mailbox));
230
231 /* process the descriptor */
232 ret = wl1251_event_process(wl, &mbox);
233 if (ret < 0)
234 return ret;
235
236 /* then we let the firmware know it can go on...*/
237 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
238
239 return 0;
240 }
241
