2 * This file is part of wl1271
4 * Copyright (C) 2008-2009 Nokia Corporation
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
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.
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.
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
25 #include "wl1271_reg.h"
26 #include "wl1271_io.h"
27 #include "wl1271_event.h"
28 #include "wl1271_ps.h"
29 #include "wl12xx_80211.h"
31 static int wl1271_event_scan_complete(struct wl1271 *wl,
32 struct event_mailbox *mbox)
34 int size = sizeof(struct wl12xx_probe_req_template);
35 wl1271_debug(DEBUG_EVENT, "status: 0x%x",
36 mbox->scheduled_scan_status);
38 if (test_bit(WL1271_FLAG_SCANNING, &wl->flags)) {
39 if (wl->scan.state == WL1271_SCAN_BAND_DUAL) {
40 wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4,
42 /* 2.4 GHz band scanned, scan 5 GHz band, pretend
43 * to the wl1271_cmd_scan function that we are not
44 * scanning as it checks that.
46 clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
47 wl1271_cmd_scan(wl, wl->scan.ssid, wl->scan.ssid_len,
50 WL1271_SCAN_BAND_5_GHZ,
51 wl->scan.probe_requests);
53 if (wl->scan.state == WL1271_SCAN_BAND_2_4_GHZ)
54 wl1271_cmd_template_set(wl,
55 CMD_TEMPL_CFG_PROBE_REQ_2_4,
58 wl1271_cmd_template_set(wl,
59 CMD_TEMPL_CFG_PROBE_REQ_5,
62 mutex_unlock(&wl->mutex);
63 ieee80211_scan_completed(wl->hw, false);
64 mutex_lock(&wl->mutex);
65 clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
71 static int wl1271_event_ps_report(struct wl1271 *wl,
72 struct event_mailbox *mbox,
77 wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);
79 switch (mbox->ps_status) {
80 case EVENT_ENTER_POWER_SAVE_FAIL:
81 wl1271_debug(DEBUG_PSM, "PSM entry failed");
83 if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
84 /* remain in active mode */
85 wl->psm_entry_retry = 0;
89 if (wl->psm_entry_retry < wl->conf.conn.psm_entry_retries) {
90 wl->psm_entry_retry++;
91 ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
94 wl1271_error("PSM entry failed, giving up.\n");
95 /* FIXME: this may need to be reconsidered. for now it
96 is not possible to indicate to the mac80211
97 afterwards that PSM entry failed. To maximize
98 functionality (receiving data and remaining
99 associated) make sure that we are in sync with the
100 AP in regard of PSM mode. */
101 ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
103 wl->psm_entry_retry = 0;
106 case EVENT_ENTER_POWER_SAVE_SUCCESS:
107 wl->psm_entry_retry = 0;
109 /* enable beacon filtering */
110 ret = wl1271_acx_beacon_filter_opt(wl, true);
114 /* enable beacon early termination */
115 ret = wl1271_acx_bet_enable(wl, true);
119 /* go to extremely low power mode */
120 wl1271_ps_elp_sleep(wl);
124 case EVENT_EXIT_POWER_SAVE_FAIL:
125 wl1271_debug(DEBUG_PSM, "PSM exit failed");
127 if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
128 wl->psm_entry_retry = 0;
132 /* make sure the firmware goes to active mode - the frame to
133 be sent next will indicate to the AP, that we are active. */
134 ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
137 case EVENT_EXIT_POWER_SAVE_SUCCESS:
145 static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
147 wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
148 wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
149 wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
152 static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
156 bool beacon_loss = false;
158 wl1271_event_mbox_dump(mbox);
160 vector = le32_to_cpu(mbox->events_vector);
161 vector &= ~(le32_to_cpu(mbox->events_mask));
162 wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
164 if (vector & SCAN_COMPLETE_EVENT_ID) {
165 ret = wl1271_event_scan_complete(wl, mbox);
171 * The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
172 * filtering) is enabled. Without PSM, the stack will receive all
173 * beacons and can detect beacon loss by itself.
175 if (vector & BSS_LOSE_EVENT_ID &&
176 test_bit(WL1271_FLAG_PSM, &wl->flags)) {
177 wl1271_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
179 /* indicate to the stack, that beacons have been lost */
183 if (vector & PS_REPORT_EVENT_ID) {
184 wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
185 ret = wl1271_event_ps_report(wl, mbox, &beacon_loss);
190 if (wl->vif && beacon_loss) {
191 /* Obviously, it's dangerous to release the mutex while
192 we are holding many of the variables in the wl struct.
193 That's why it's done last in the function, and care must
194 be taken that nothing more is done after this function
196 mutex_unlock(&wl->mutex);
197 ieee80211_beacon_loss(wl->vif);
198 mutex_lock(&wl->mutex);
204 int wl1271_event_unmask(struct wl1271 *wl)
208 ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
215 void wl1271_event_mbox_config(struct wl1271 *wl)
217 wl->mbox_ptr[0] = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
218 wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
220 wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
221 wl->mbox_ptr[0], wl->mbox_ptr[1]);
224 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
226 struct event_mailbox mbox;
229 wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
234 /* first we read the mbox descriptor */
235 wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
236 sizeof(struct event_mailbox), false);
238 /* process the descriptor */
239 ret = wl1271_event_process(wl, &mbox);
243 /* then we let the firmware know it can go on...*/
244 wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);