| /* |
| * 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 "wl12xx.h" |
| #include "reg.h" |
| #include "io.h" |
| #include "event.h" |
| #include "ps.h" |
| #include "scan.h" |
| #include "wl12xx_80211.h" |
| |
| void wl1271_pspoll_work(struct work_struct *work) |
| { |
| struct delayed_work *dwork; |
| struct wl1271 *wl; |
| int ret; |
| |
| 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. |
| */ |
| ret = wl1271_ps_elp_wakeup(wl); |
| if (ret < 0) |
| goto out; |
| |
| wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE, wl->basic_rate, true); |
| |
| wl1271_ps_elp_sleep(wl); |
| out: |
| mutex_unlock(&wl->mutex); |
| }; |
| |
| 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. |
| */ |
| } |
| |
| 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; |
| |
| if (wl->ps_compl) { |
| complete(wl->ps_compl); |
| wl->ps_compl = NULL; |
| } |
| break; |
| 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; |
| bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS); |
| |
| 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) { |
| wl1271_debug(DEBUG_EVENT, "status: 0x%x", |
| mbox->scheduled_scan_status); |
| |
| wl1271_scan_stm(wl); |
| } |
| |
| if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) { |
| wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_REPORT_EVENT " |
| "(status 0x%0x)", mbox->scheduled_scan_status); |
| |
| wl1271_scan_sched_scan_results(wl); |
| } |
| |
| if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID) { |
| wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT " |
| "(status 0x%0x)", mbox->scheduled_scan_status); |
| if (wl->sched_scanning) { |
| wl1271_scan_sched_scan_stop(wl); |
| ieee80211_sched_scan_stopped(wl->hw); |
| } |
| } |
| |
| /* disable dynamic PS when requested by the firmware */ |
| if (vector & SOFT_GEMINI_SENSE_EVENT_ID && |
| wl->bss_type == BSS_TYPE_STA_BSS) { |
| if (mbox->soft_gemini_sense_info) |
| ieee80211_disable_dyn_ps(wl->vif); |
| else |
| ieee80211_enable_dyn_ps(wl->vif); |
| } |
| |
| /* |
| * 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) && !is_ap) { |
| wl1271_info("Beacon loss detected."); |
| |
| /* indicate to the stack, that beacons have been lost */ |
| beacon_loss = true; |
| } |
| |
| if ((vector & PS_REPORT_EVENT_ID) && !is_ap) { |
| wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT"); |
| ret = wl1271_event_ps_report(wl, mbox, &beacon_loss); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if ((vector & PSPOLL_DELIVERY_FAILURE_EVENT_ID) && !is_ap) |
| wl1271_event_pspoll_delivery_fail(wl); |
| |
| 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 ((vector & DUMMY_PACKET_EVENT_ID) && !is_ap) { |
| wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID"); |
| if (wl->vif) |
| wl1271_tx_dummy_packet(wl); |
| } |
| |
| 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; |
| } |