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
  30 static int wl1271_event_scan_complete(struct wl1271 *wl,
  31                                       struct event_mailbox *mbox)
  32 {
  33         wl1271_debug(DEBUG_EVENT, "status: 0x%x",
  34                      mbox->scheduled_scan_status);
  35
  36         if (wl->scanning) {
  37                 mutex_unlock(&wl->mutex);
  38                 ieee80211_scan_completed(wl->hw, false);
  39                 mutex_lock(&wl->mutex);
  40                 wl->scanning = false;
  41         }
  42
  43         return 0;
  44 }
  45
  46 static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
  47 {
  48         wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
  49         wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
  50         wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
  51 }
  52
  53 static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
  54 {
  55         int ret;
  56         u32 vector;
  57
  58         wl1271_event_mbox_dump(mbox);
  59
  60         vector = mbox->events_vector & ~(mbox->events_mask);
  61         wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
  62
  63         if (vector & SCAN_COMPLETE_EVENT_ID) {
  64                 ret = wl1271_event_scan_complete(wl, mbox);
  65                 if (ret < 0)
  66                         return ret;
  67         }
  68
  69         if (vector & BSS_LOSE_EVENT_ID) {
  70                 wl1271_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
  71
  72                 if (wl->psm_requested && wl->psm) {
  73                         ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
  74                         if (ret < 0)
  75                                 return ret;
  76                 }
  77         }
  78
  79         return 0;
  80 }
  81
  82 int wl1271_event_unmask(struct wl1271 *wl)
  83 {
  84         int ret;
  85
  86         ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
  87         if (ret < 0)
  88                 return ret;
  89
  90         return 0;
  91 }
  92
  93 void wl1271_event_mbox_config(struct wl1271 *wl)
  94 {
  95         wl->mbox_ptr[0] = wl1271_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
  96         wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
  97
  98         wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
  99                      wl->mbox_ptr[0], wl->mbox_ptr[1]);
 100 }
 101
 102 int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
 103 {
 104         struct event_mailbox mbox;
 105         int ret;
 106
 107         wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 108
 109         if (mbox_num > 1)
 110                 return -EINVAL;
 111
 112         /* first we read the mbox descriptor */
 113         wl1271_spi_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
 114                             sizeof(struct event_mailbox));
 115
 116         /* process the descriptor */
 117         ret = wl1271_event_process(wl, &mbox);
 118         if (ret < 0)
 119                 return ret;
 120
 121         /* then we let the firmware know it can go on...*/
 122         wl1271_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
 123
 124         return 0;
 125 }