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/*
* This file is part of wl1251
*
* Copyright (c) 1998-2007 Texas Instruments Incorporated
* Copyright (C) 2008 Nokia Corporation
*
* 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 "wl1251.h"
#include "reg.h"
#include "io.h"
#include "event.h"
#include "ps.h"
static int wl1251_event_scan_complete(struct wl1251 *wl,
struct event_mailbox *mbox)
{
int ret = 0;
wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
mbox->scheduled_scan_status,
mbox->scheduled_scan_channels);
if (wl->scanning) {
ieee80211_scan_completed(wl->hw, false);
wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
wl->scanning = false;
if (wl->hw->conf.flags & IEEE80211_CONF_IDLE)
ret = wl1251_ps_set_mode(wl, STATION_IDLE);
}
return ret;
}
#define WL1251_PSM_ENTRY_RETRIES 3
static int wl1251_event_ps_report(struct wl1251 *wl,
struct event_mailbox *mbox)
{
int ret = 0;
wl1251_debug(DEBUG_EVENT, "ps status: %x", mbox->ps_status);
switch (mbox->ps_status) {
case EVENT_ENTER_POWER_SAVE_FAIL:
wl1251_debug(DEBUG_PSM, "PSM entry failed");
if (wl->station_mode != STATION_POWER_SAVE_MODE) {
/* remain in active mode */
wl->psm_entry_retry = 0;
break;
}
if (wl->psm_entry_retry < WL1251_PSM_ENTRY_RETRIES) {
wl->psm_entry_retry++;
ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
} else {
wl1251_error("Power save entry failed, giving up");
wl->psm_entry_retry = 0;
}
break;
case EVENT_ENTER_POWER_SAVE_SUCCESS:
case EVENT_EXIT_POWER_SAVE_FAIL:
case EVENT_EXIT_POWER_SAVE_SUCCESS:
default:
wl->psm_entry_retry = 0;
break;
}
return 0;
}
static void wl1251_event_mbox_dump(struct event_mailbox *mbox)
{
wl1251_debug(DEBUG_EVENT, "MBOX DUMP:");
wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
}
static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox)
{
int ret;
u32 vector;
wl1251_event_mbox_dump(mbox);
vector = mbox->events_vector & ~(mbox->events_mask);
wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector);
if (vector & SCAN_COMPLETE_EVENT_ID) {
ret = wl1251_event_scan_complete(wl, mbox);
if (ret < 0)
return ret;
}
if (vector & BSS_LOSE_EVENT_ID) {
wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
if (wl->psm_requested &&
wl->station_mode != STATION_ACTIVE_MODE) {
ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
if (ret < 0)
return ret;
}
}
if (vector & PS_REPORT_EVENT_ID) {
wl1251_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
ret = wl1251_event_ps_report(wl, mbox);
if (ret < 0)
return ret;
}
if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) {
wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT");
/* indicate to the stack, that beacons have been lost */
if (wl->vif && wl->vif->type == NL80211_IFTYPE_STATION)
ieee80211_beacon_loss(wl->vif);
}
if (vector & REGAINED_BSS_EVENT_ID) {
if (wl->psm_requested) {
ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
if (ret < 0)
return ret;
}
}
if (wl->vif && wl->rssi_thold) {
if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) {
wl1251_debug(DEBUG_EVENT,
"ROAMING_TRIGGER_LOW_RSSI_EVENT");
ieee80211_cqm_rssi_notify(wl->vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
GFP_KERNEL);
}
if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) {
wl1251_debug(DEBUG_EVENT,
"ROAMING_TRIGGER_REGAINED_RSSI_EVENT");
ieee80211_cqm_rssi_notify(wl->vif,
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
GFP_KERNEL);
}
}
return 0;
}
/*
* Poll the mailbox event field until any of the bits in the mask is set or a
* timeout occurs (WL1251_EVENT_TIMEOUT in msecs)
*/
int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms)
{
u32 events_vector, event;
unsigned long timeout;
timeout = jiffies + msecs_to_jiffies(timeout_ms);
do {
if (time_after(jiffies, timeout))
return -ETIMEDOUT;
msleep(1);
/* read from both event fields */
wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector,
sizeof(events_vector));
event = events_vector & mask;
wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector,
sizeof(events_vector));
event |= events_vector & mask;
} while (!event);
return 0;
}
int wl1251_event_unmask(struct wl1251 *wl)
{
int ret;
ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask));
if (ret < 0)
return ret;
return 0;
}
void wl1251_event_mbox_config(struct wl1251 *wl)
{
wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
wl->mbox_ptr[0], wl->mbox_ptr[1]);
}
int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num)
{
struct event_mailbox mbox;
int ret;
wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
if (mbox_num > 1)
return -EINVAL;
/* first we read the mbox descriptor */
wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
sizeof(struct event_mailbox));
/* process the descriptor */
ret = wl1251_event_process(wl, &mbox);
if (ret < 0)
return ret;
/* then we let the firmware know it can go on...*/
wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
return 0;
}
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