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         int size = sizeof(struct wl12xx_probe_req_template);
  35         wl1271_debug(DEBUG_EVENT, "status: 0x%x",
  36                      mbox->scheduled_scan_status);
  37
  38         if (wl->scanning) {
  39                 if (wl->scan.state == WL1271_SCAN_BAND_DUAL) {
  40                         wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4,
  41                                                 NULL, size);
  42                         /* 2.4 GHz band scanned, scan 5 GHz band, pretend
  43                          * to the wl1271_cmd_scan function that we are not
  44                          * scanning as it checks that.
  45                          */
  46                         wl->scanning = false;
  47                         wl1271_cmd_scan(wl, wl->scan.ssid, wl->scan.ssid_len,
  48                                                 wl->scan.active,
  49                                                 wl->scan.high_prio,
  50                                                 WL1271_SCAN_BAND_5_GHZ,
  51                                                 wl->scan.probe_requests);
  52                 } else {
  53                         if (wl->scan.state == WL1271_SCAN_BAND_2_4_GHZ)
  54                                 wl1271_cmd_template_set(wl,
  55                                                 CMD_TEMPL_CFG_PROBE_REQ_2_4,
  56                                                 NULL, size);
  57                         else
  58                                 wl1271_cmd_template_set(wl,
  59                                                 CMD_TEMPL_CFG_PROBE_REQ_5,
  60                                                 NULL, size);
  61
  62                         mutex_unlock(&wl->mutex);
  63                         ieee80211_scan_completed(wl->hw, false);
  64                         mutex_lock(&wl->mutex);
  65                         wl->scanning = false;
  66                 }
  67         }
  68         return 0;
  69 }
  70
  71 static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
  72 {
  73         wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
  74         wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
  75         wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
  76 }
  77
  78 static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
  79 {
  80         int ret;
  81         u32 vector;
  82
  83         wl1271_event_mbox_dump(mbox);
  84
  85         vector = le32_to_cpu(mbox->events_vector);
  86         vector &= ~(le32_to_cpu(mbox->events_mask));
  87         wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
  88
  89         if (vector & SCAN_COMPLETE_EVENT_ID) {
  90                 ret = wl1271_event_scan_complete(wl, mbox);
  91                 if (ret < 0)
  92                         return ret;
  93         }
  94
  95         /*
  96          * The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
  97          * filtering) is enabled. Without PSM, the stack will receive all
  98          * beacons and can detect beacon loss by itself.
  99          */
 100         if (vector & BSS_LOSE_EVENT_ID && wl->psm) {
 101                 wl1271_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
 102
 103                 /* indicate to the stack, that beacons have been lost */
 104                 ieee80211_beacon_loss(wl->vif);
 105         }
 106
 107         return 0;
 108 }
 109
 110 int wl1271_event_unmask(struct wl1271 *wl)
 111 {
 112         int ret;
 113
 114         ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
 115         if (ret < 0)
 116                 return ret;
 117
 118         return 0;
 119 }
 120
 121 void wl1271_event_mbox_config(struct wl1271 *wl)
 122 {
 123         wl->mbox_ptr[0] = wl1271_spi_read32(wl, REG_EVENT_MAILBOX_PTR);
 124         wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
 125
 126         wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
 127                      wl->mbox_ptr[0], wl->mbox_ptr[1]);
 128 }
 129
 130 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num, bool do_ack)
 131 {
 132         struct event_mailbox mbox;
 133         int ret;
 134
 135         wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 136
 137         if (mbox_num > 1)
 138                 return -EINVAL;
 139
 140         /* first we read the mbox descriptor */
 141         wl1271_spi_read(wl, wl->mbox_ptr[mbox_num], &mbox,
 142                         sizeof(struct event_mailbox), false);
 143
 144         /* process the descriptor */
 145         ret = wl1271_event_process(wl, &mbox);
 146         if (ret < 0)
 147                 return ret;
 148
 149         /* then we let the firmware know it can go on...*/
 150         if (do_ack)
 151                 wl1271_spi_write32(wl, ACX_REG_INTERRUPT_TRIG,
 152                                    INTR_TRIG_EVENT_ACK);
 153
 154         return 0;
 155 }