drivers/net/wireless/b43legacy/leds.c

   1 /*
   2
   3   Broadcom B43legacy wireless driver
   4
   5   Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
   6                      Stefano Brivio <st3@riseup.net>
   7                      Michael Buesch <mb@bu3sch.de>
   8                      Danny van Dyk <kugelfang@gentoo.org>
   9                      Andreas Jaggi <andreas.jaggi@waterwave.ch>
  10   Copyright (c) 2007 Larry Finger <Larry.Finger@lwfinger.net>
  11
  12   This program is free software; you can redistribute it and/or modify
  13   it under the terms of the GNU General Public License as published by
  14   the Free Software Foundation; either version 2 of the License, or
  15   (at your option) any later version.
  16
  17   This program is distributed in the hope that it will be useful,
  18   but WITHOUT ANY WARRANTY; without even the implied warranty of
  19   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20   GNU General Public License for more details.
  21
  22   You should have received a copy of the GNU General Public License
  23   along with this program; see the file COPYING.  If not, write to
  24   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  25   Boston, MA 02110-1301, USA.
  26
  27 */
  28
  29 #include "leds.h"
  30 #include "b43legacy.h"
  31 #include "main.h"
  32
  33 static void b43legacy_led_changestate(struct b43legacy_led *led)
  34 {
  35         struct b43legacy_wldev *dev = led->dev;
  36         const int index = led->index;
  37         u16 ledctl;
  38
  39         B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
  40         B43legacy_WARN_ON(!led->blink_interval);
  41         ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
  42         ledctl ^= (1 << index);
  43         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
  44 }
  45
  46 static void b43legacy_led_blink(unsigned long d)
  47 {
  48         struct b43legacy_led *led = (struct b43legacy_led *)d;
  49         struct b43legacy_wldev *dev = led->dev;
  50         unsigned long flags;
  51
  52         spin_lock_irqsave(&dev->wl->leds_lock, flags);
  53         if (led->blink_interval) {
  54                 b43legacy_led_changestate(led);
  55                 mod_timer(&led->blink_timer, jiffies + led->blink_interval);
  56         }
  57         spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
  58 }
  59
  60 static void b43legacy_led_blink_start(struct b43legacy_led *led,
  61                                       unsigned long interval)
  62 {
  63         if (led->blink_interval)
  64                 return;
  65         led->blink_interval = interval;
  66         b43legacy_led_changestate(led);
  67         led->blink_timer.expires = jiffies + interval;
  68         add_timer(&led->blink_timer);
  69 }
  70
  71 static void b43legacy_led_blink_stop(struct b43legacy_led *led, int sync)
  72 {
  73         struct b43legacy_wldev *dev = led->dev;
  74         const int index = led->index;
  75         u16 ledctl;
  76
  77         if (!led->blink_interval)
  78                 return;
  79         if (unlikely(sync))
  80                 del_timer_sync(&led->blink_timer);
  81         else
  82                 del_timer(&led->blink_timer);
  83         led->blink_interval = 0;
  84
  85         /* Make sure the LED is turned off. */
  86         B43legacy_WARN_ON(!(index >= 0 && index < B43legacy_NR_LEDS));
  87         ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
  88         if (led->activelow)
  89                 ledctl |= (1 << index);
  90         else
  91                 ledctl &= ~(1 << index);
  92         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
  93 }
  94
  95 static void b43legacy_led_init_hardcoded(struct b43legacy_wldev *dev,
  96                                          struct b43legacy_led *led,
  97                                          int led_index)
  98 {
  99         struct ssb_bus *bus = dev->dev->bus;
 100
 101         /* This function is called, if the behaviour (and activelow)
 102          * information for a LED is missing in the SPROM.
 103          * We hardcode the behaviour values for various devices here.
 104          * Note that the B43legacy_LED_TEST_XXX behaviour values can
 105          * be used to figure out which led is mapped to which index.
 106          */
 107
 108         switch (led_index) {
 109         case 0:
 110                 led->behaviour = B43legacy_LED_ACTIVITY;
 111                 led->activelow = 1;
 112                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
 113                         led->behaviour = B43legacy_LED_RADIO_ALL;
 114                 break;
 115         case 1:
 116                 led->behaviour = B43legacy_LED_RADIO_B;
 117                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
 118                         led->behaviour = B43legacy_LED_ASSOC;
 119                 break;
 120         case 2:
 121                 led->behaviour = B43legacy_LED_RADIO_A;
 122                 break;
 123         case 3:
 124                 led->behaviour = B43legacy_LED_OFF;
 125                 break;
 126         default:
 127                 B43legacy_BUG_ON(1);
 128         }
 129 }
 130
 131 int b43legacy_leds_init(struct b43legacy_wldev *dev)
 132 {
 133         struct b43legacy_led *led;
 134         u8 sprom[4];
 135         int i;
 136
 137         sprom[0] = dev->dev->bus->sprom.r1.gpio0;
 138         sprom[1] = dev->dev->bus->sprom.r1.gpio1;
 139         sprom[2] = dev->dev->bus->sprom.r1.gpio2;
 140         sprom[3] = dev->dev->bus->sprom.r1.gpio3;
 141
 142         for (i = 0; i < B43legacy_NR_LEDS; i++) {
 143                 led = &(dev->leds[i]);
 144                 led->index = i;
 145                 led->dev = dev;
 146                 setup_timer(&led->blink_timer,
 147                             b43legacy_led_blink,
 148                             (unsigned long)led);
 149
 150                 if (sprom[i] == 0xFF)
 151                         b43legacy_led_init_hardcoded(dev, led, i);
 152                 else {
 153                         led->behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
 154                         led->activelow = !!(sprom[i] &
 155                                            B43legacy_LED_ACTIVELOW);
 156                 }
 157         }
 158
 159         return 0;
 160 }
 161
 162 void b43legacy_leds_exit(struct b43legacy_wldev *dev)
 163 {
 164         struct b43legacy_led *led;
 165         int i;
 166
 167         for (i = 0; i < B43legacy_NR_LEDS; i++) {
 168                 led = &(dev->leds[i]);
 169                 b43legacy_led_blink_stop(led, 1);
 170         }
 171         b43legacy_leds_switch_all(dev, 0);
 172 }
 173
 174 void b43legacy_leds_update(struct b43legacy_wldev *dev, int activity)
 175 {
 176         struct b43legacy_led *led;
 177         struct b43legacy_phy *phy = &dev->phy;
 178         const int transferring = (jiffies - dev->stats.last_tx)
 179                                   < B43legacy_LED_XFER_THRES;
 180         int i;
 181         int turn_on;
 182         unsigned long interval = 0;
 183         u16 ledctl;
 184         unsigned long flags;
 185         bool radio_enabled = (phy->radio_on && dev->radio_hw_enable);
 186
 187         spin_lock_irqsave(&dev->wl->leds_lock, flags);
 188         ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 189         for (i = 0; i < B43legacy_NR_LEDS; i++) {
 190                 led = &(dev->leds[i]);
 191
 192                 turn_on = 0;
 193                 switch (led->behaviour) {
 194                 case B43legacy_LED_INACTIVE:
 195                         continue;
 196                 case B43legacy_LED_OFF:
 197                         break;
 198                 case B43legacy_LED_ON:
 199                         turn_on = 1;
 200                         break;
 201                 case B43legacy_LED_ACTIVITY:
 202                         turn_on = activity;
 203                         break;
 204                 case B43legacy_LED_RADIO_ALL:
 205                         turn_on = radio_enabled;
 206                         break;
 207                 case B43legacy_LED_RADIO_A:
 208                         break;
 209                 case B43legacy_LED_RADIO_B:
 210                         turn_on = radio_enabled;
 211                         break;
 212                 case B43legacy_LED_MODE_BG:
 213                         if (phy->type == B43legacy_PHYTYPE_G && radio_enabled)
 214                                 turn_on = 1;
 215                         break;
 216                 case B43legacy_LED_TRANSFER:
 217                         if (transferring)
 218                                 b43legacy_led_blink_start(led,
 219                                                 B43legacy_LEDBLINK_MEDIUM);
 220                         else
 221                                 b43legacy_led_blink_stop(led, 0);
 222                         continue;
 223                 case B43legacy_LED_APTRANSFER:
 224                         if (b43legacy_is_mode(dev->wl,
 225                                                 IEEE80211_IF_TYPE_AP)) {
 226                                 if (transferring) {
 227                                         interval = B43legacy_LEDBLINK_FAST;
 228                                         turn_on = 1;
 229                                 }
 230                         } else {
 231                                 turn_on = 1;
 232                                 if (transferring)
 233                                         interval = B43legacy_LEDBLINK_FAST;
 234                                 else
 235                                         turn_on = 0;
 236                         }
 237                         if (turn_on)
 238                                 b43legacy_led_blink_start(led, interval);
 239                         else
 240                                 b43legacy_led_blink_stop(led, 0);
 241                         continue;
 242                 case B43legacy_LED_WEIRD:
 243                         break;
 244                 case B43legacy_LED_ASSOC:
 245                         turn_on = 1;
 246 #ifdef CONFIG_B43LEGACY_DEBUG
 247                 case B43legacy_LED_TEST_BLINKSLOW:
 248                         b43legacy_led_blink_start(led, B43legacy_LEDBLINK_SLOW);
 249                         continue;
 250                 case B43legacy_LED_TEST_BLINKMEDIUM:
 251                         b43legacy_led_blink_start(led,
 252                                                    B43legacy_LEDBLINK_MEDIUM);
 253                         continue;
 254                 case B43legacy_LED_TEST_BLINKFAST:
 255                         b43legacy_led_blink_start(led, B43legacy_LEDBLINK_FAST);
 256                         continue;
 257 #endif /* CONFIG_B43LEGACY_DEBUG */
 258                 default:
 259                         B43legacy_BUG_ON(1);
 260                 };
 261
 262                 if (led->activelow)
 263                         turn_on = !turn_on;
 264                 if (turn_on)
 265                         ledctl |= (1 << i);
 266                 else
 267                         ledctl &= ~(1 << i);
 268         }
 269         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
 270         spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
 271 }
 272
 273 void b43legacy_leds_switch_all(struct b43legacy_wldev *dev, int on)
 274 {
 275         struct b43legacy_led *led;
 276         u16 ledctl;
 277         int i;
 278         int bit_on;
 279         unsigned long flags;
 280
 281         spin_lock_irqsave(&dev->wl->leds_lock, flags);
 282         ledctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
 283         for (i = 0; i < B43legacy_NR_LEDS; i++) {
 284                 led = &(dev->leds[i]);
 285                 if (led->behaviour == B43legacy_LED_INACTIVE)
 286                         continue;
 287                 if (on)
 288                         bit_on = led->activelow ? 0 : 1;
 289                 else
 290                         bit_on = led->activelow ? 1 : 0;
 291                 if (bit_on)
 292                         ledctl |= (1 << i);
 293                 else
 294                         ledctl &= ~(1 << i);
 295         }
 296         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ledctl);
 297         spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
 298 }