drivers/net/wireless/wl12xx/event.c

   1 /*
   2  * This file is part of wl12xx
   3  *
   4  * Copyright (c) 1998-2007 Texas Instruments Incorporated
   5  * Copyright (C) 2008 Nokia Corporation
   6  *
   7  * Contact: Kalle Valo <kalle.valo@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 #include "wl12xx.h"
  26 #include "reg.h"
  27 #include "spi.h"
  28 #include "event.h"
  29 #include "ps.h"
  30
  31 static int wl12xx_event_scan_complete(struct wl12xx *wl,
  32                                       struct event_mailbox *mbox)
  33 {
  34         wl12xx_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
  35                      mbox->scheduled_scan_status,
  36                      mbox->scheduled_scan_channels);
  37
  38         if (wl->scanning) {
  39                 mutex_unlock(&wl->mutex);
  40                 ieee80211_scan_completed(wl->hw, false);
  41                 mutex_lock(&wl->mutex);
  42                 wl->scanning = false;
  43         }
  44
  45         return 0;
  46 }
  47
  48 static void wl12xx_event_mbox_dump(struct event_mailbox *mbox)
  49 {
  50         wl12xx_debug(DEBUG_EVENT, "MBOX DUMP:");
  51         wl12xx_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
  52         wl12xx_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
  53 }
  54
  55 static int wl12xx_event_process(struct wl12xx *wl, struct event_mailbox *mbox)
  56 {
  57         int ret;
  58         u32 vector;
  59
  60         wl12xx_event_mbox_dump(mbox);
  61
  62         vector = mbox->events_vector & ~(mbox->events_mask);
  63         wl12xx_debug(DEBUG_EVENT, "vector: 0x%x", vector);
  64
  65         if (vector & SCAN_COMPLETE_EVENT_ID) {
  66                 ret = wl12xx_event_scan_complete(wl, mbox);
  67                 if (ret < 0)
  68                         return ret;
  69         }
  70
  71         if (vector & BSS_LOSE_EVENT_ID) {
  72                 wl12xx_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
  73
  74                 if (wl->psm_requested && wl->psm) {
  75                         ret = wl12xx_ps_set_mode(wl, STATION_ACTIVE_MODE);
  76                         if (ret < 0)
  77                                 return ret;
  78                 }
  79         }
  80
  81         return 0;
  82 }
  83
  84 int wl12xx_event_unmask(struct wl12xx *wl)
  85 {
  86         int ret;
  87
  88         ret = wl12xx_acx_event_mbox_mask(wl, ~(wl->event_mask));
  89         if (ret < 0)
  90                 return ret;
  91
  92         return 0;
  93 }
  94
  95 void wl12xx_event_mbox_config(struct wl12xx *wl)
  96 {
  97         wl->mbox_ptr[0] = wl12xx_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
  98         wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
  99
 100         wl12xx_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
 101                      wl->mbox_ptr[0], wl->mbox_ptr[1]);
 102 }
 103
 104 int wl12xx_event_handle(struct wl12xx *wl, u8 mbox_num)
 105 {
 106         struct event_mailbox mbox;
 107         int ret;
 108
 109         wl12xx_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
 110
 111         if (mbox_num > 1)
 112                 return -EINVAL;
 113
 114         /* first we read the mbox descriptor */
 115         wl12xx_spi_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
 116                             sizeof(struct event_mailbox));
 117
 118         /* process the descriptor */
 119         ret = wl12xx_event_process(wl, &mbox);
 120         if (ret < 0)
 121                 return ret;
 122
 123         /* then we let the firmware know it can go on...*/
 124         wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
 125
 126         return 0;
 127 }