static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
{
int ret;
u32 vector;
wl1271_event_mbox_dump(mbox);
vector = mbox->events_vector & ~(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;
}
if (vector & BSS_LOSE_EVENT_ID) {
wl1271_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
if (wl->psm_requested && wl->psm) {
ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
if (ret < 0)
return ret;
}
}
return 0;
}
static void wl1271_event_pspoll_delivery_fail(struct wl1271 *wl)
{
int delay = wl->conf.conn.ps_poll_recovery_period;
int ret;
wl->ps_poll_failures++;
if (wl->ps_poll_failures == 1)
wl1271_info("AP with dysfunctional ps-poll, "
"trying to work around it.");
/* force active mode receive data from the AP */
if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
wl->basic_rate, true);
if (ret < 0)
return;
set_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags);
ieee80211_queue_delayed_work(wl->hw, &wl->pspoll_work,
msecs_to_jiffies(delay));
}
/*
* If already in active mode, lets we should be getting data from
* the AP right away. If we enter PSM too fast after this, and data
* remains on the AP, we will get another event like this, and we'll
* go into active once more.
*/
}
void wl1271_pspoll_work(struct work_struct *work)
{
struct delayed_work *dwork;
struct wl1271 *wl;
dwork = container_of(work, struct delayed_work, work);
wl = container_of(dwork, struct wl1271, pspoll_work);
wl1271_debug(DEBUG_EVENT, "pspoll work");
mutex_lock(&wl->mutex);
if (unlikely(wl->state == WL1271_STATE_OFF))
goto out;
if (!test_and_clear_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags))
goto out;
if (!test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
goto out;
/*
* if we end up here, then we were in powersave when the pspoll
* delivery failure occurred, and no-one changed state since, so
* we should go back to powersave.
*/
wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE, wl->basic_rate, true);
out:
mutex_unlock(&wl->mutex);
};
static int wl1271_event_ps_report(struct wl1271 *wl,
struct event_mailbox *mbox,
bool *beacon_loss)
{
int ret = 0;
u32 total_retries = wl->conf.conn.psm_entry_retries;
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 < total_retries) {
wl->psm_entry_retry++;
ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
wl->basic_rate, 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;
/*
* BET has only a minor effect in 5GHz and masks
* channel switch IEs, so we only enable BET on 2.4GHz
*/
if (wl->band == IEEE80211_BAND_2GHZ)
/* enable beacon early termination */
ret = wl1271_acx_bet_enable(wl, true);
if (wl->ps_compl) {
complete(wl->ps_compl);
wl->ps_compl = NULL;
}
break;
default:
break;
}
return ret;
}
static ssize_t forced_ps_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct wl1271 *wl = file->private_data;
struct wl12xx_vif *wlvif;
unsigned long value;
int ret, ps_mode;
ret = kstrtoul_from_user(user_buf, count, 10, &value);
if (ret < 0) {
wl1271_warning("illegal value in forced_ps");
return -EINVAL;
}
if (value != 1 && value != 0) {
wl1271_warning("forced_ps should be either 0 or 1");
return -ERANGE;
}
mutex_lock(&wl->mutex);
if (wl->conf.conn.forced_ps == value)
goto out;
wl->conf.conn.forced_ps = value;
if (wl->state == WL1271_STATE_OFF)
goto out;
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
/* In case we're already in PSM, trigger it again to switch mode
* immediately without waiting for re-association
*/
ps_mode = value ? STATION_POWER_SAVE_MODE : STATION_AUTO_PS_MODE;
wl12xx_for_each_wlvif_sta(wl, wlvif) {
if (test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags))
wl1271_ps_set_mode(wl, wlvif, ps_mode);
}
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return count;
}
static ssize_t dynamic_ps_timeout_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct wl1271 *wl = file->private_data;
struct wl12xx_vif *wlvif;
unsigned long value;
int ret;
ret = kstrtoul_from_user(user_buf, count, 10, &value);
if (ret < 0) {
wl1271_warning("illegal value in dynamic_ps");
return -EINVAL;
}
if (value < 1 || value > 65535) {
wl1271_warning("dyanmic_ps_timeout is not in valid range");
return -ERANGE;
}
mutex_lock(&wl->mutex);
wl->conf.conn.dynamic_ps_timeout = value;
if (wl->state == WL1271_STATE_OFF)
goto out;
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
/* In case we're already in PSM, trigger it again to set new timeout
* immediately without waiting for re-association
*/
wl12xx_for_each_wlvif_sta(wl, wlvif) {
if (test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags))
wl1271_ps_set_mode(wl, wlvif, STATION_AUTO_PS_MODE);
}
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return count;
}
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:
if (!wl->psm) {
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);
} else {
wl1271_error("PSM entry failed, giving up.\n");
wl->psm_entry_retry = 0;
*beacon_loss = true;
}
break;
case EVENT_ENTER_POWER_SAVE_SUCCESS:
wl->psm_entry_retry = 0;
break;
case EVENT_EXIT_POWER_SAVE_FAIL:
wl1271_info("PSM exit failed");
break;
case EVENT_EXIT_POWER_SAVE_SUCCESS:
default:
break;
}
return ret;
}
static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
enum wl1271_cmd_ps_mode mode;
struct wl1271 *wl = hw->priv;
int ret;
wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
if (changed & BSS_CHANGED_ASSOC) {
if (bss_conf->assoc) {
wl->aid = bss_conf->aid;
ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
if (ret < 0)
goto out_sleep;
ret = wl1271_acx_aid(wl, wl->aid);
if (ret < 0)
goto out_sleep;
if (wl->psm_requested && !wl->psm) {
mode = STATION_POWER_SAVE_MODE;
ret = wl1271_ps_set_mode(wl, mode);
if (ret < 0)
goto out_sleep;
}
}
}
if (changed & BSS_CHANGED_ERP_SLOT) {
if (bss_conf->use_short_slot)
ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
else
ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
if (ret < 0) {
wl1271_warning("Set slot time failed %d", ret);
goto out_sleep;
}
}
if (changed & BSS_CHANGED_ERP_PREAMBLE) {
if (bss_conf->use_short_preamble)
wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
else
wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
}
if (changed & BSS_CHANGED_ERP_CTS_PROT) {
if (bss_conf->use_cts_prot)
ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
else
ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
if (ret < 0) {
wl1271_warning("Set ctsprotect failed %d", ret);
goto out_sleep;
}
}
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
{
struct wl1271 *wl = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
int channel, ret = 0;
channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
channel,
conf->flags & IEEE80211_CONF_PS ? "on" : "off",
conf->power_level);
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
if (channel != wl->channel) {
u8 old_channel = wl->channel;
wl->channel = channel;
ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
if (ret < 0) {
wl->channel = old_channel;
goto out_sleep;
}
}
ret = wl1271_cmd_build_null_data(wl);
if (ret < 0)
goto out_sleep;
if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
wl1271_info("psm enabled");
wl->psm_requested = true;
ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
} else if (!(conf->flags & IEEE80211_CONF_PS) &&
wl->psm_requested) {
wl1271_info("psm disabled");
wl->psm_requested = false;
if (wl->psm)
ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
}
if (conf->power_level != wl->power_level) {
ret = wl1271_acx_tx_power(wl, conf->power_level);
if (ret < 0)
goto out;
wl->power_level = conf->power_level;
}
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static int wl1271_event_ps_report(struct wl1271 *wl,
struct event_mailbox *mbox,
bool *beacon_loss)
{
int ret = 0;
u32 total_retries = wl->conf.conn.psm_entry_retries;
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 < total_retries) {
wl->psm_entry_retry++;
ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
wl->basic_rate, 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);
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,
wl->basic_rate, false);
break;
case EVENT_EXIT_POWER_SAVE_SUCCESS:
default:
break;
}
return ret;
}
static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
{
struct wl1271 *wl = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
int channel, ret = 0;
channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
wl1271_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
channel,
conf->flags & IEEE80211_CONF_PS ? "on" : "off",
conf->power_level);
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
if (channel != wl->channel) {
u8 old_channel = wl->channel;
wl->channel = channel;
/* FIXME: use beacon interval provided by mac80211 */
ret = wl1271_cmd_join(wl, wl->bss_type, 1, 100, 0);
if (ret < 0) {
wl->channel = old_channel;
goto out_sleep;
}
}
ret = wl1271_cmd_build_null_data(wl);
if (ret < 0)
goto out_sleep;
if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
wl1271_info("psm enabled");
wl->psm_requested = true;
/*
* We enter PSM only if we're already associated.
* If we're not, we'll enter it when joining an SSID,
* through the bss_info_changed() hook.
*/
ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
} else if (!(conf->flags & IEEE80211_CONF_PS) &&
wl->psm_requested) {
wl1271_info("psm disabled");
wl->psm_requested = false;
if (wl->psm)
ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
}
if (conf->power_level != wl->power_level) {
ret = wl1271_acx_tx_power(wl, conf->power_level);
if (ret < 0)
goto out;
wl->power_level = conf->power_level;
}
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}