1 files changed, 310 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/event.c b/drivers/net/wireless/wl12xx/event.c
new file mode 100644
index 000000000000..c3c554cd6580
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/event.c
@@ -0,0 +1,310 @@
+/*
+ * 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;
+}