drivers/net/wireless/wl1251/event.c

   1 /*
   2  * This file is part of wl1251
   3  *
   4  * Copyright (c) 1998-2007 Texas Instruments Incorporated
   5  * Copyright (C) 2008 Nokia Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  19  * 02110-1301 USA
  20  *
  21  */
  22
  23 #include "wl1251.h"
  24 #include "reg.h"
  25 #include "io.h"
  26 #include "event.h"
  27 #include "ps.h"
  28
  29 static int wl1251_event_scan_complete(struct wl1251 *wl,
  30                                       struct event_mailbox *mbox)
  31 {
  32         wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
  33                      mbox->scheduled_scan_status,
  34                      mbox->scheduled_scan_channels);
  35
  36         if (wl->scanning) {
  37                 ieee80211_scan_completed(wl->hw, false);
  38                 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
  39                 wl->scanning = false;
  40         }
  41
  42         return 0;
  43 }
  44
  45 static void wl1251_event_mbox_dump(struct event_mailbox *mbox)
  46 {
  47         wl1251_debug(DEBUG_EVENT, "MBOX DUMP:");
  48         wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
  49         wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
  50 }
  51
  52 static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox)
  53 {
  54         int ret;
  55         u32 vector;
  56
  57         wl1251_event_mbox_dump(mbox);
  58
  59         vector = mbox->events_vector & ~(mbox->events_mask);
  60         wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector);
  61
  62         if (vector & SCAN_COMPLETE_EVENT_ID) {
  63                 ret = wl1251_event_scan_complete(wl, mbox);
  64                 if (ret < 0)
  65                         return ret;
  66         }
  67
  68         if (vector & BSS_LOSE_EVENT_ID) {
  69                 wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
  70                 wl->bss_lost = 1;
  71                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
  72         }
  73
  74         if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) {
  75                 wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT");
  76
  77                 /* indicate to the stack, that beacons have been lost */
  78                 if (wl->vif && wl->vif->type == NL80211_IFTYPE_STATION)
  79                         ieee80211_beacon_loss(wl->vif);
  80         }
  81
  82         if (vector & REGAINED_BSS_EVENT_ID) {
  83                 wl->bss_lost = 0;
  84                 ieee80211_queue_delayed_work(wl->hw, &wl->ps_work, 0);
  85         }
  86
  87         if (wl->vif && wl->rssi_thold) {
  88                 if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) {
  89                         wl1251_debug(DEBUG_EVENT,
  90                                      "ROAMING_TRIGGER_LOW_RSSI_EVENT");
  91                         ieee80211_cqm_rssi_notify(wl->vif,
  92                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
  93                                 GFP_KERNEL);
  94                 }
  95
  96                 if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) {
  97                         wl1251_debug(DEBUG_EVENT,
  98                                      "ROAMING_TRIGGER_REGAINED_RSSI_EVENT");
  99                         ieee80211_cqm_rssi_notify(wl->vif,
 100                                 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
 101                                 GFP_KERNEL);
 102                 }
 103         }
 104
 105         if (vector & PS_REPORT_EVENT_ID) {
 106                 if (mbox->ps_status == ENTER_POWER_SAVE_SUCCESS) {
 107                         /* enable beacon filtering */
 108                         ret = wl1251_acx_beacon_filter_opt(wl, true);
 109                         if (ret < 0)
 110                                 wl1251_error("beacon filter enable failed");
 111
 112                 } else if (wl->ps_transitioning) {
 113                         if (mbox->ps_status == ENTER_POWER_SAVE_FAIL)
 114                                 wl->station_mode = STATION_ACTIVE_MODE;
 115                         /* always happens on exit from idle - ignore for now
 116                         else if (mbox->ps_status == EXIT_POWER_SAVE_FAIL)
 117                                 wl->station_mode = STATION_POWER_SAVE_MODE;
 118                         */
 119                 }
 120
 121                 //wl1251_error("ps_status %d, mode %d",
 122                 //      mbox->ps_status, wl->station_mode);
 123                 wl->ps_transitioning = false;
 124         }
 125
 126         return 0;
 127 }
 128
 129 /*
 130  * Poll the mailbox event field until any of the bits in the mask is set or a
 131  * timeout occurs (WL1251_EVENT_TIMEOUT in msecs)
 132  */
 133 int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms)
 134 {
 135         u32 events_vector, event;
 136         unsigned long timeout;
 137
 138         timeout = jiffies + msecs_to_jiffies(timeout_ms);
 139
 140         do {
 141                 if (time_after(jiffies, timeout))
 142                         return -ETIMEDOUT;
 143
 144                 msleep(1);
 145
 146                 /* read from both event fields */
 147                 wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector,
 148                                 sizeof(events_vector));
 149                 event = events_vector & mask;
 150                 wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector,
 151                                 sizeof(events_vector));
 152                 event |= events_vector & mask;
 153         } while (!event);
 154
 155         return 0;
 156 }
 157
 158 int wl1251_event_unmask(struct wl1251 *wl)
 159 {
 160         int ret;
 161
 162         ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask));
 163         if (ret < 0)
 164                 return ret;
 165
 166         return 0;
 167 }
 168
 169 void wl1251_event_mbox_config(struct wl1251 *wl)
 170 {
 171         wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
 172         wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
 173
 174         wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
 175                      wl->mbox_ptr[0], wl->mbox_ptr[1]);
 176 }
 177
 178 int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num)
 179 {
 180         struct event_mailbox mbox;
 181         int ret;
 182
 183         wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 184
 185         if (mbox_num > 1)
 186                 return -EINVAL;
 187
 188         /* first we read the mbox descriptor */
 189         wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
 190                             sizeof(struct event_mailbox));
 191
 192         /* process the descriptor */
 193         ret = wl1251_event_process(wl, &mbox);
 194         if (ret < 0)
 195                 return ret;
 196
 197         /* then we let the firmware know it can go on...*/
 198         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
 199
 200         return 0;
 201 }