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
  30 /* Returns TRUE, if the radio is enabled in hardware. */
  31 static bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev)
  32 {
  33         if (dev->phy.rev >= 3) {
  34                 if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI)
  35                       & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK))
  36                         return 1;
  37         } else {
  38                 if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO)
  39                     & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK)
  40                         return 1;
  41         }
  42         return 0;
  43 }
  44
  45 /* The poll callback for the hardware button. */
  46 static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev)
  47 {
  48         struct b43legacy_wldev *dev = poll_dev->private;
  49         struct b43legacy_wl *wl = dev->wl;
  50         bool enabled;
  51
  52         mutex_lock(&wl->mutex);
  53         B43legacy_WARN_ON(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED);
  54         enabled = b43legacy_is_hw_radio_enabled(dev);
  55         if (unlikely(enabled != dev->radio_hw_enable)) {
  56                 dev->radio_hw_enable = enabled;
  57                 b43legacyinfo(wl, "Radio hardware status changed to %s\n",
  58                         enabled ? "ENABLED" : "DISABLED");
  59                 mutex_unlock(&wl->mutex);
  60                 input_report_key(poll_dev->input, KEY_WLAN, enabled);
  61         } else
  62                 mutex_unlock(&wl->mutex);
  63 }
  64
  65 /* Called when the RFKILL toggled in software.
  66  * This is called without locking. */
  67 static int b43legacy_rfkill_soft_toggle(void *data, enum rfkill_state state)
  68 {
  69         struct b43legacy_wldev *dev = data;
  70         struct b43legacy_wl *wl = dev->wl;
  71         int err = 0;
  72
  73         mutex_lock(&wl->mutex);
  74         if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
  75                 goto out_unlock;
  76
  77         switch (state) {
  78         case RFKILL_STATE_ON:
  79                 if (!dev->radio_hw_enable) {
  80                         /* No luck. We can't toggle the hardware RF-kill
  81                          * button from software. */
  82                         err = -EBUSY;
  83                         goto out_unlock;
  84                 }
  85                 if (!dev->phy.radio_on)
  86                         b43legacy_radio_turn_on(dev);
  87                 break;
  88         case RFKILL_STATE_OFF:
  89                 if (dev->phy.radio_on)
  90                         b43legacy_radio_turn_off(dev, 0);
  91                 break;
  92         }
  93
  94 out_unlock:
  95         mutex_unlock(&wl->mutex);
  96
  97         return err;
  98 }
  99
 100 char * b43legacy_rfkill_led_name(struct b43legacy_wldev *dev)
 101 {
 102         struct b43legacy_wl *wl = dev->wl;
 103
 104         if (!wl->rfkill.rfkill)
 105                 return NULL;
 106         return rfkill_get_led_name(wl->rfkill.rfkill);
 107 }
 108
 109 void b43legacy_rfkill_init(struct b43legacy_wldev *dev)
 110 {
 111         struct b43legacy_wl *wl = dev->wl;
 112         struct b43legacy_rfkill *rfk = &(wl->rfkill);
 113         int err;
 114
 115         if (rfk->rfkill) {
 116                 err = rfkill_register(rfk->rfkill);
 117                 if (err) {
 118                         b43legacywarn(wl, "Failed to register RF-kill button\n");
 119                         goto err_free_rfk;
 120                 }
 121         }
 122         if (rfk->poll_dev) {
 123                 err = input_register_polled_device(rfk->poll_dev);
 124                 if (err) {
 125                         b43legacywarn(wl, "Failed to register RF-kill polldev\n");
 126                         goto err_free_polldev;
 127                 }
 128         }
 129
 130         return;
 131 err_free_rfk:
 132         rfkill_free(rfk->rfkill);
 133         rfk->rfkill = NULL;
 134 err_free_polldev:
 135         input_free_polled_device(rfk->poll_dev);
 136         rfk->poll_dev = NULL;
 137 }
 138
 139 void b43legacy_rfkill_exit(struct b43legacy_wldev *dev)
 140 {
 141         struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
 142
 143         if (rfk->poll_dev)
 144                 input_unregister_polled_device(rfk->poll_dev);
 145         if (rfk->rfkill)
 146                 rfkill_unregister(rfk->rfkill);
 147 }
 148
 149 void b43legacy_rfkill_alloc(struct b43legacy_wldev *dev)
 150 {
 151         struct b43legacy_wl *wl = dev->wl;
 152         struct b43legacy_rfkill *rfk = &(wl->rfkill);
 153
 154         snprintf(rfk->name, sizeof(rfk->name),
 155                  "b43legacy-%s", wiphy_name(wl->hw->wiphy));
 156
 157         rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
 158         if (!rfk->rfkill) {
 159                 b43legacywarn(wl, "Failed to allocate RF-kill button\n");
 160                 return;
 161         }
 162         rfk->rfkill->name = rfk->name;
 163         rfk->rfkill->state = RFKILL_STATE_ON;
 164         rfk->rfkill->data = dev;
 165         rfk->rfkill->toggle_radio = b43legacy_rfkill_soft_toggle;
 166         rfk->rfkill->user_claim_unsupported = 1;
 167
 168         rfk->poll_dev = input_allocate_polled_device();
 169         if (rfk->poll_dev) {
 170                 rfk->poll_dev->private = dev;
 171                 rfk->poll_dev->poll = b43legacy_rfkill_poll;
 172                 rfk->poll_dev->poll_interval = 1000; /* msecs */
 173         } else
 174                 b43legacywarn(wl, "Failed to allocate RF-kill polldev\n");
 175 }
 176
 177 void b43legacy_rfkill_free(struct b43legacy_wldev *dev)
 178 {
 179         struct b43legacy_rfkill *rfk = &(dev->wl->rfkill);
 180
 181         input_free_polled_device(rfk->poll_dev);
 182         rfk->poll_dev = NULL;
 183         rfkill_free(rfk->rfkill);
 184         rfk->rfkill = NULL;
 185 }