SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/b43legacy/rfkill.c

   1 /*
   2
   3   Broadcom B43 wireless driver
   4   RFKILL support
   5
   6   Copyright (c) 2007 Michael Buesch <mb@bu3sch.de>
   7
   8   This program is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU 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; see the file COPYING.  If not, write to
  20   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  21   Boston, MA 02110-1301, USA.
  22
  23 */
  24
  25 #include "rfkill.h"
  26 #include "radio.h"
  27 #include "b43legacy.h"
  28
  29 #include <linux/kmod.h>
  30
  31
  32 /* Returns TRUE, if the radio is enabled in hardware. */
  33 static bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
  34 {
  35         if (dev->phy.rev >= 3) {
  36                 if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
  37                       & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
  38                         return 1;
  39         } else {
  40                 if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
  41                     & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
  42                         return 1;
  43         }
  44         return 0;
  45 }
  46
  47 /* The poll callback for the hardware button. */
  48 static void b43legacy_rfkill_poll(struct rfkill *rfkill, void *data)
  49 {
  50         struct b43legacy_wldev *dev = data;
  51         struct b43legacy_wl *wl = dev->wl;
  52         bool enabled;
  53
  54         mutex_lock(&wl->mutex);
  55         if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) {
  56                 mutex_unlock(&wl->mutex);
  57                 return;
  58         }
  59         enabled = b43legacy_is_hw_radio_enabled(dev);
  60         if (unlikely(enabled != dev->radio_hw_enable)) {
  61                 dev->radio_hw_enable = enabled;
  62                 b43legacyinfo(wl, "Radio hardware status changed to %s\n",
  63                         enabled ? "ENABLED" : "DISABLED");
  64                 enabled = !rfkill_set_hw_state(rfkill, !enabled);
  65                 if (enabled != dev->phy.radio_on) {
  66                         if (enabled)
  67                                 b43legacy_radio_turn_on(dev);
  68                         else
  69                                 b43legacy_radio_turn_off(dev, 0);
  70                 }
  71         }
  72         mutex_unlock(&wl->mutex);
  73 }
  74
  75 /* Called when the RFKILL toggled in software.
  76  * This is called without locking. */
  77 static int b43legacy_rfkill_soft_set(void *data, bool blocked)
  78 {
  79         struct b43legacy_wldev *dev = data;
  80         struct b43legacy_wl *wl = dev->wl;
  81         int ret = -EINVAL;
  82
  83         if (!wl->rfkill.registered)
  84                 return -EINVAL;
  85
  86         mutex_lock(&wl->mutex);
  87         if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
  88                 goto out_unlock;
  89
  90         if (!dev->radio_hw_enable)
  91                 goto out_unlock;
  92
  93         if (!blocked != dev->phy.radio_on) {
  94                 if (!blocked)
  95                         b43legacy_radio_turn_on(dev);
  96                 else
  97                         b43legacy_radio_turn_off(dev, 0);
  98         }
  99         ret = 0;
 100
 101 out_unlock:
 102         mutex_unlock(&wl->mutex);
 103         return ret;
 104 }
 105
 106 const char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev)
 107 {
 108         struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
 109
 110         if (!rfk->registered)
 111                 return NULL;
 112         return rfkill_get_led_trigger_name(rfk->rfkill);
 113 }
 114
 115 static const struct rfkill_ops b43legacy_rfkill_ops = {
 116         .set_block = b43legacy_rfkill_soft_set,
 117         .poll = b43legacy_rfkill_poll,
 118 };
 119
 120 void b43legacy_rfkill_init(struct b43legacy_wldev *dev)
 121 {
 122         struct b43legacy_wl *wl = dev->wl;
 123         struct b43legacy_rfkill *rfk = &(wl->rfkill);
 124         int err;
 125
 126         rfk->registered = 0;
 127
 128         snprintf(rfk->name, sizeof(rfk->name),
 129                  "b43legacy-%s", wiphy_name(wl->hw->wiphy));
 130         rfk->rfkill = rfkill_alloc(rfk->name,
 131                                    dev->dev->dev,
 132                                    RFKILL_TYPE_WLAN,
 133                                    &b43legacy_rfkill_ops, dev);
 134         if (!rfk->rfkill)
 135                 goto out_error;
 136
 137         err = rfkill_register(rfk->rfkill);
 138         if (err)
 139                 goto err_free;
 140
 141         rfk->registered = 1;
 142
 143         return;
 144  err_free:
 145         rfkill_destroy(rfk->rfkill);
 146  out_error:
 147         rfk->registered = 0;
 148         b43legacywarn(wl, "RF-kill button init failed\n");
 149 }
 150
 151 void b43legacy_rfkill_exit(struct b43legacy_wldev *dev)
 152 {
 153         struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
 154
 155         if (!rfk->registered)
 156                 return;
 157         rfk->registered = 0;
 158
 159         rfkill_unregister(rfk->rfkill);
 160         rfkill_destroy(rfk->rfkill);
 161         rfk->rfkill = NULL;
 162 }
 163