package/b43/src/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 "b43.h"
  27
  28
  29 /* Returns TRUE, if the radio is enabled in hardware. */
  30 static bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
  31 {
  32         if (dev->phy.rev >= 3) {
  33                 if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
  34                       & B43_MMIO_RADIO_HWENABLED_HI_MASK))
  35                         return 1;
  36         } else {
  37                 if (b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
  38                     & B43_MMIO_RADIO_HWENABLED_LO_MASK)
  39                         return 1;
  40         }
  41         return 0;
  42 }
  43
  44 /* The poll callback for the hardware button. */
  45 static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
  46 {
  47         struct b43_wldev *dev = poll_dev->private;
  48         struct b43_wl *wl = dev->wl;
  49         bool enabled;
  50
  51         mutex_lock(&wl->mutex);
  52         B43_WARN_ON(b43_status(dev) < B43_STAT_INITIALIZED);
  53         enabled = b43_is_hw_radio_enabled(dev);
  54         if (unlikely(enabled != dev->radio_hw_enable)) {
  55                 dev->radio_hw_enable = enabled;
  56                 b43info(wl, "Radio hardware status changed to %s\n",
  57                         enabled ? "ENABLED" : "DISABLED");
  58                 mutex_unlock(&wl->mutex);
  59                 input_report_key(poll_dev->input, KEY_WLAN, enabled);
  60         } else
  61                 mutex_unlock(&wl->mutex);
  62 }
  63
  64 /* Called when the RFKILL toggled in software.
  65  * This is called without locking. */
  66 static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state)
  67 {
  68         struct b43_wldev *dev = data;
  69         struct b43_wl *wl = dev->wl;
  70         int err = 0;
  71
  72         mutex_lock(&wl->mutex);
  73         if (b43_status(dev) < B43_STAT_INITIALIZED)
  74                 goto out_unlock;
  75
  76         switch (state) {
  77         case RFKILL_STATE_ON:
  78                 if (!dev->radio_hw_enable) {
  79                         /* No luck. We can't toggle the hardware RF-kill
  80                          * button from software. */
  81                         err = -EBUSY;
  82                         goto out_unlock;
  83                 }
  84                 if (!dev->phy.radio_on)
  85                         b43_radio_turn_on(dev);
  86                 break;
  87         case RFKILL_STATE_OFF:
  88                 if (dev->phy.radio_on)
  89                         b43_radio_turn_off(dev, 0);
  90                 break;
  91         }
  92
  93 out_unlock:
  94         mutex_unlock(&wl->mutex);
  95
  96         return err;
  97 }
  98
  99 char * b43_rfkill_led_name(struct b43_wldev *dev)
 100 {
 101         struct b43_wl *wl = dev->wl;
 102
 103         if (!wl->rfkill.rfkill)
 104                 return NULL;
 105         return rfkill_get_led_name(wl->rfkill.rfkill);
 106 }
 107
 108 void b43_rfkill_init(struct b43_wldev *dev)
 109 {
 110         struct b43_wl *wl = dev->wl;
 111         struct b43_rfkill *rfk = &(wl->rfkill);
 112         int err;
 113
 114         if (rfk->rfkill) {
 115                 err = rfkill_register(rfk->rfkill);
 116                 if (err) {
 117                         b43warn(wl, "Failed to register RF-kill button\n");
 118                         goto err_free_rfk;
 119                 }
 120         }
 121         if (rfk->poll_dev) {
 122                 err = input_register_polled_device(rfk->poll_dev);
 123                 if (err) {
 124                         b43warn(wl, "Failed to register RF-kill polldev\n");
 125                         goto err_free_polldev;
 126                 }
 127         }
 128
 129         return;
 130 err_free_rfk:
 131         rfkill_free(rfk->rfkill);
 132         rfk->rfkill = NULL;
 133 err_free_polldev:
 134         input_free_polled_device(rfk->poll_dev);
 135         rfk->poll_dev = NULL;
 136 }
 137
 138 void b43_rfkill_exit(struct b43_wldev *dev)
 139 {
 140         struct b43_rfkill *rfk = &(dev->wl->rfkill);
 141
 142         if (rfk->poll_dev)
 143                 input_unregister_polled_device(rfk->poll_dev);
 144         if (rfk->rfkill)
 145                 rfkill_unregister(rfk->rfkill);
 146 }
 147
 148 void b43_rfkill_alloc(struct b43_wldev *dev)
 149 {
 150         struct b43_wl *wl = dev->wl;
 151         struct b43_rfkill *rfk = &(wl->rfkill);
 152
 153         snprintf(rfk->name, sizeof(rfk->name),
 154                  "b43-%s", wiphy_name(wl->hw->wiphy));
 155
 156         rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
 157         if (!rfk->rfkill) {
 158                 b43warn(wl, "Failed to allocate RF-kill button\n");
 159                 return;
 160         }
 161         rfk->rfkill->name = rfk->name;
 162         rfk->rfkill->state = RFKILL_STATE_ON;
 163         rfk->rfkill->data = dev;
 164         rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle;
 165         rfk->rfkill->user_claim_unsupported = 1;
 166
 167         rfk->poll_dev = input_allocate_polled_device();
 168         if (rfk->poll_dev) {
 169                 rfk->poll_dev->private = dev;
 170                 rfk->poll_dev->poll = b43_rfkill_poll;
 171                 rfk->poll_dev->poll_interval = 1000; /* msecs */
 172         } else
 173                 b43warn(wl, "Failed to allocate RF-kill polldev\n");
 174 }
 175
 176 void b43_rfkill_free(struct b43_wldev *dev)
 177 {
 178         struct b43_rfkill *rfk = &(dev->wl->rfkill);
 179
 180         input_free_polled_device(rfk->poll_dev);
 181         rfk->poll_dev = NULL;
 182         rfkill_free(rfk->rfkill);
 183         rfk->rfkill = NULL;
 184 }