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/*
* 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.h"
#include "wl1271_reg.h"
#include "wl1271_io.h"
#include "wl1271_event.h"
#include "wl1271_ps.h"
#include "wl12xx_80211.h"
static int wl1271_event_scan_complete(struct wl1271 *wl,
struct event_mailbox *mbox)
{
wl1271_debug(DEBUG_EVENT, "status: 0x%x",
mbox->scheduled_scan_status);
if (test_bit(WL1271_FLAG_SCANNING, &wl->flags)) {
if (wl->scan.state == WL1271_SCAN_BAND_DUAL) {
/* 2.4 GHz band scanned, scan 5 GHz band, pretend
* to the wl1271_cmd_scan function that we are not
* scanning as it checks that.
*/
clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
/* FIXME: ie missing! */
wl1271_cmd_scan(wl, wl->scan.ssid, wl->scan.ssid_len,
wl->scan.req,
wl->scan.active,
wl->scan.high_prio,
WL1271_SCAN_BAND_5_GHZ,
wl->scan.probe_requests);
} else {
mutex_unlock(&wl->mutex);
ieee80211_scan_completed(wl->hw, false);
mutex_lock(&wl->mutex);
clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
}
}
return 0;
}
static int wl1271_event_ps_report(struct wl1271 *wl,
struct event_mailbox *mbox,
bool *beacon_loss)
{
int ret = 0;
wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);
switch (mbox->ps_status) {
case EVENT_ENTER_POWER_SAVE_FAIL:
wl1271_debug(DEBUG_PSM, "PSM entry failed");
if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
/* remain in active mode */
wl->psm_entry_retry = 0;
break;
}
if (wl->psm_entry_retry < wl->conf.conn.psm_entry_retries) {
wl->psm_entry_retry++;
ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
true);
} else {
wl1271_info("No ack to nullfunc from AP.");
wl->psm_entry_retry = 0;
*beacon_loss = true;
}
break;
case EVENT_ENTER_POWER_SAVE_SUCCESS:
wl->psm_entry_retry = 0;
/* enable beacon filtering */
ret = wl1271_acx_beacon_filter_opt(wl, true);
if (ret < 0)
break;
/* enable beacon early termination */
ret = wl1271_acx_bet_enable(wl, true);
if (ret < 0)
break;
/* go to extremely low power mode */
wl1271_ps_elp_sleep(wl);
if (ret < 0)
break;
break;
case EVENT_EXIT_POWER_SAVE_FAIL:
wl1271_debug(DEBUG_PSM, "PSM exit failed");
if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
wl->psm_entry_retry = 0;
break;
}
/* make sure the firmware goes to active mode - the frame to
be sent next will indicate to the AP, that we are active. */
ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
false);
break;
case EVENT_EXIT_POWER_SAVE_SUCCESS:
default:
break;
}
return ret;
}
static void wl1271_event_rssi_trigger(struct wl1271 *wl,
struct event_mailbox *mbox)
{
enum nl80211_cqm_rssi_threshold_event event;
s8 metric = mbox->rssi_snr_trigger_metric[0];
wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
if (metric <= wl->rssi_thold)
event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
else
event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
if (event != wl->last_rssi_event)
ieee80211_cqm_rssi_notify(wl->vif, event, GFP_KERNEL);
wl->last_rssi_event = event;
}
static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
{
wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
}
static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
{
int ret;
u32 vector;
bool beacon_loss = false;
wl1271_event_mbox_dump(mbox);
vector = le32_to_cpu(mbox->events_vector);
vector &= ~(le32_to_cpu(mbox->events_mask));
wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
if (vector & SCAN_COMPLETE_EVENT_ID) {
ret = wl1271_event_scan_complete(wl, mbox);
if (ret < 0)
return ret;
}
/*
* The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
* filtering) is enabled. Without PSM, the stack will receive all
* beacons and can detect beacon loss by itself.
*
* As there's possibility that the driver disables PSM before receiving
* BSS_LOSE_EVENT, beacon loss has to be reported to the stack.
*
*/
if (vector & BSS_LOSE_EVENT_ID) {
wl1271_info("Beacon loss detected.");
/* indicate to the stack, that beacons have been lost */
beacon_loss = true;
}
if (vector & PS_REPORT_EVENT_ID) {
wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
ret = wl1271_event_ps_report(wl, mbox, &beacon_loss);
if (ret < 0)
return ret;
}
if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
if (wl->vif)
wl1271_event_rssi_trigger(wl, mbox);
}
if (wl->vif && beacon_loss)
ieee80211_connection_loss(wl->vif);
return 0;
}
int wl1271_event_unmask(struct wl1271 *wl)
{
int ret;
ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
if (ret < 0)
return ret;
return 0;
}
void wl1271_event_mbox_config(struct wl1271 *wl)
{
wl->mbox_ptr[0] = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
wl->mbox_ptr[0], wl->mbox_ptr[1]);
}
int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
{
struct event_mailbox mbox;
int ret;
wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
if (mbox_num > 1)
return -EINVAL;
/* first we read the mbox descriptor */
wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
sizeof(struct event_mailbox), false);
/* process the descriptor */
ret = wl1271_event_process(wl, &mbox);
if (ret < 0)
return ret;
/* then we let the firmware know it can go on...*/
wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
return 0;
}
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