drivers/net/wireless/wl12xx/wl1271_event.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2009 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include "wl1271.h"
  25 #include "wl1271_reg.h"
  26 #include "wl1271_spi.h"
  27 #include "wl1271_event.h"
  28 #include "wl1271_ps.h"
  29 #include "wl12xx_80211.h"
  30
  31 static int wl1271_event_scan_complete(struct wl1271 *wl,
  32                                       struct event_mailbox *mbox)
  33 {
  34         wl1271_debug(DEBUG_EVENT, "status: 0x%x",
  35                      mbox->scheduled_scan_status);
  36
  37         if (wl->scanning) {
  38                 int size = sizeof(struct wl12xx_probe_req_template);
  39                 wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4, NULL,
  40                                         size);
  41                 mutex_unlock(&wl->mutex);
  42                 ieee80211_scan_completed(wl->hw, false);
  43                 mutex_lock(&wl->mutex);
  44                 wl->scanning = false;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
  51 {
  52         wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
  53         wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
  54         wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
  55 }
  56
  57 static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
  58 {
  59         int ret;
  60         u32 vector;
  61
  62         wl1271_event_mbox_dump(mbox);
  63
  64         vector = mbox->events_vector & ~(mbox->events_mask);
  65         wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
  66
  67         if (vector & SCAN_COMPLETE_EVENT_ID) {
  68                 ret = wl1271_event_scan_complete(wl, mbox);
  69                 if (ret < 0)
  70                         return ret;
  71         }
  72
  73         /*
  74          * The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
  75          * filtering) is enabled. Without PSM, the stack will receive all
  76          * beacons and can detect beacon loss by itself.
  77          */
  78         if (vector & BSS_LOSE_EVENT_ID && wl->psm) {
  79                 wl1271_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
  80
  81                 /* indicate to the stack, that beacons have been lost */
  82                 ieee80211_beacon_loss(wl->vif);
  83         }
  84
  85         return 0;
  86 }
  87
  88 int wl1271_event_unmask(struct wl1271 *wl)
  89 {
  90         int ret;
  91
  92         ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
  93         if (ret < 0)
  94                 return ret;
  95
  96         return 0;
  97 }
  98
  99 void wl1271_event_mbox_config(struct wl1271 *wl)
 100 {
 101         wl->mbox_ptr[0] = wl1271_spi_read32(wl, REG_EVENT_MAILBOX_PTR);
 102         wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
 103
 104         wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
 105                      wl->mbox_ptr[0], wl->mbox_ptr[1]);
 106 }
 107
 108 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
 109 {
 110         struct event_mailbox mbox;
 111         int ret;
 112
 113         wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 114
 115         if (mbox_num > 1)
 116                 return -EINVAL;
 117
 118         /* first we read the mbox descriptor */
 119         wl1271_spi_read(wl, wl->mbox_ptr[mbox_num], &mbox,
 120                         sizeof(struct event_mailbox), false);
 121
 122         /* process the descriptor */
 123         ret = wl1271_event_process(wl, &mbox);
 124         if (ret < 0)
 125                 return ret;
 126
 127         /* then we let the firmware know it can go on...*/
 128         wl1271_spi_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
 129
 130         return 0;
 131 }