drivers/net/wireless/b43/leds.c

   1 /*
   2
   3   Broadcom B43 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
  11   This program is free software; you can redistribute it and/or modify
  12   it under the terms of the GNU General Public License as published by
  13   the Free Software Foundation; either version 2 of the License, or
  14   (at your option) any later version.
  15
  16   This program is distributed in the hope that it will be useful,
  17   but WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19   GNU General Public License for more details.
  20
  21   You should have received a copy of the GNU General Public License
  22   along with this program; see the file COPYING.  If not, write to
  23   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  24   Boston, MA 02110-1301, USA.
  25
  26 */
  27
  28 #include "b43.h"
  29 #include "leds.h"
  30 #include "main.h"
  31
  32 static void b43_led_changestate(struct b43_led *led)
  33 {
  34         struct b43_wldev *dev = led->dev;
  35         const int index = led->index;
  36         u16 ledctl;
  37
  38         B43_WARN_ON(!(index >= 0 && index < B43_NR_LEDS));
  39         B43_WARN_ON(!led->blink_interval);
  40         ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
  41         ledctl ^= (1 << index);
  42         b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
  43 }
  44
  45 static void b43_led_blink(unsigned long d)
  46 {
  47         struct b43_led *led = (struct b43_led *)d;
  48         struct b43_wldev *dev = led->dev;
  49         unsigned long flags;
  50
  51         spin_lock_irqsave(&dev->wl->leds_lock, flags);
  52         if (led->blink_interval) {
  53                 b43_led_changestate(led);
  54                 mod_timer(&led->blink_timer, jiffies + led->blink_interval);
  55         }
  56         spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
  57 }
  58
  59 static void b43_led_blink_start(struct b43_led *led, unsigned long interval)
  60 {
  61         if (led->blink_interval)
  62                 return;
  63         led->blink_interval = interval;
  64         b43_led_changestate(led);
  65         led->blink_timer.expires = jiffies + interval;
  66         add_timer(&led->blink_timer);
  67 }
  68
  69 static void b43_led_blink_stop(struct b43_led *led, int sync)
  70 {
  71         struct b43_wldev *dev = led->dev;
  72         const int index = led->index;
  73         u16 ledctl;
  74
  75         if (!led->blink_interval)
  76                 return;
  77         if (unlikely(sync))
  78                 del_timer_sync(&led->blink_timer);
  79         else
  80                 del_timer(&led->blink_timer);
  81         led->blink_interval = 0;
  82
  83         /* Make sure the LED is turned off. */
  84         B43_WARN_ON(!(index >= 0 && index < B43_NR_LEDS));
  85         ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
  86         if (led->activelow)
  87                 ledctl |= (1 << index);
  88         else
  89                 ledctl &= ~(1 << index);
  90         b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
  91 }
  92
  93 static void b43_led_init_hardcoded(struct b43_wldev *dev,
  94                                    struct b43_led *led, int led_index)
  95 {
  96         struct ssb_bus *bus = dev->dev->bus;
  97
  98         /* This function is called, if the behaviour (and activelow)
  99          * information for a LED is missing in the SPROM.
 100          * We hardcode the behaviour values for various devices here.
 101          * Note that the B43_LED_TEST_XXX behaviour values can
 102          * be used to figure out which led is mapped to which index.
 103          */
 104
 105         switch (led_index) {
 106         case 0:
 107                 led->behaviour = B43_LED_ACTIVITY;
 108                 led->activelow = 1;
 109                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
 110                         led->behaviour = B43_LED_RADIO_ALL;
 111                 break;
 112         case 1:
 113                 led->behaviour = B43_LED_RADIO_B;
 114                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
 115                         led->behaviour = B43_LED_ASSOC;
 116                 break;
 117         case 2:
 118                 led->behaviour = B43_LED_RADIO_A;
 119                 break;
 120         case 3:
 121                 led->behaviour = B43_LED_OFF;
 122                 break;
 123         default:
 124                 B43_WARN_ON(1);
 125         }
 126 }
 127
 128 int b43_leds_init(struct b43_wldev *dev)
 129 {
 130         struct b43_led *led;
 131         u8 sprom[4];
 132         int i;
 133
 134         sprom[0] = dev->dev->bus->sprom.r1.gpio0;
 135         sprom[1] = dev->dev->bus->sprom.r1.gpio1;
 136         sprom[2] = dev->dev->bus->sprom.r1.gpio2;
 137         sprom[3] = dev->dev->bus->sprom.r1.gpio3;
 138
 139         for (i = 0; i < B43_NR_LEDS; i++) {
 140                 led = &(dev->leds[i]);
 141                 led->index = i;
 142                 led->dev = dev;
 143                 setup_timer(&led->blink_timer,
 144                             b43_led_blink, (unsigned long)led);
 145
 146                 if (sprom[i] == 0xFF) {
 147                         b43_led_init_hardcoded(dev, led, i);
 148                 } else {
 149                         led->behaviour = sprom[i] & B43_LED_BEHAVIOUR;
 150                         led->activelow = !!(sprom[i] & B43_LED_ACTIVELOW);
 151                 }
 152         }
 153
 154         return 0;
 155 }
 156
 157 void b43_leds_exit(struct b43_wldev *dev)
 158 {
 159         struct b43_led *led;
 160         int i;
 161
 162         for (i = 0; i < B43_NR_LEDS; i++) {
 163                 led = &(dev->leds[i]);
 164                 b43_led_blink_stop(led, 1);
 165         }
 166         b43_leds_switch_all(dev, 0);
 167 }
 168
 169 void b43_leds_update(struct b43_wldev *dev, int activity)
 170 {
 171         struct b43_led *led;
 172         struct b43_phy *phy = &dev->phy;
 173         const int transferring =
 174             (jiffies - dev->stats.last_tx) < B43_LED_XFER_THRES;
 175         int i, turn_on;
 176         unsigned long interval = 0;
 177         u16 ledctl;
 178         unsigned long flags;
 179
 180         spin_lock_irqsave(&dev->wl->leds_lock, flags);
 181         ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
 182         for (i = 0; i < B43_NR_LEDS; i++) {
 183                 led = &(dev->leds[i]);
 184
 185                 turn_on = 0;
 186                 switch (led->behaviour) {
 187                 case B43_LED_INACTIVE:
 188                         continue;
 189                 case B43_LED_OFF:
 190                         break;
 191                 case B43_LED_ON:
 192                         turn_on = 1;
 193                         break;
 194                 case B43_LED_ACTIVITY:
 195                         turn_on = activity;
 196                         break;
 197                 case B43_LED_RADIO_ALL:
 198                         turn_on = phy->radio_on && b43_is_hw_radio_enabled(dev);
 199                         break;
 200                 case B43_LED_RADIO_A:
 201                         turn_on = (phy->radio_on && b43_is_hw_radio_enabled(dev)
 202                                    && phy->type == B43_PHYTYPE_A);
 203                         break;
 204                 case B43_LED_RADIO_B:
 205                         turn_on = (phy->radio_on && b43_is_hw_radio_enabled(dev)
 206                                    && (phy->type == B43_PHYTYPE_B
 207                                        || phy->type == B43_PHYTYPE_G));
 208                         break;
 209                 case B43_LED_MODE_BG:
 210                         if (phy->type == B43_PHYTYPE_G
 211                             && b43_is_hw_radio_enabled(dev)
 212                             && 1 /*FIXME: using G rates. */ )
 213                                 turn_on = 1;
 214                         break;
 215                 case B43_LED_TRANSFER:
 216                         if (transferring)
 217                                 b43_led_blink_start(led, B43_LEDBLINK_MEDIUM);
 218                         else
 219                                 b43_led_blink_stop(led, 0);
 220                         continue;
 221                 case B43_LED_APTRANSFER:
 222                         if (b43_is_mode(dev->wl, IEEE80211_IF_TYPE_AP)) {
 223                                 if (transferring) {
 224                                         interval = B43_LEDBLINK_FAST;
 225                                         turn_on = 1;
 226                                 }
 227                         } else {
 228                                 turn_on = 1;
 229                                 if (0 /*TODO: not assoc */ )
 230                                         interval = B43_LEDBLINK_SLOW;
 231                                 else if (transferring)
 232                                         interval = B43_LEDBLINK_FAST;
 233                                 else
 234                                         turn_on = 0;
 235                         }
 236                         if (turn_on)
 237                                 b43_led_blink_start(led, interval);
 238                         else
 239                                 b43_led_blink_stop(led, 0);
 240                         continue;
 241                 case B43_LED_WEIRD:
 242                         //TODO
 243                         break;
 244                 case B43_LED_ASSOC:
 245                         if (1 /*dev->softmac->associated */ )
 246                                 turn_on = 1;
 247                         break;
 248 #ifdef CONFIG_B43_DEBUG
 249                 case B43_LED_TEST_BLINKSLOW:
 250                         b43_led_blink_start(led, B43_LEDBLINK_SLOW);
 251                         continue;
 252                 case B43_LED_TEST_BLINKMEDIUM:
 253                         b43_led_blink_start(led, B43_LEDBLINK_MEDIUM);
 254                         continue;
 255                 case B43_LED_TEST_BLINKFAST:
 256                         b43_led_blink_start(led, B43_LEDBLINK_FAST);
 257                         continue;
 258 #endif /* CONFIG_B43_DEBUG */
 259                 default:
 260                         B43_WARN_ON(1);
 261                 };
 262
 263                 if (led->activelow)
 264                         turn_on = !turn_on;
 265                 if (turn_on)
 266                         ledctl |= (1 << i);
 267                 else
 268                         ledctl &= ~(1 << i);
 269         }
 270         b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
 271         spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
 272 }
 273
 274 void b43_leds_switch_all(struct b43_wldev *dev, int on)
 275 {
 276         struct b43_led *led;
 277         u16 ledctl;
 278         int i;
 279         int bit_on;
 280         unsigned long flags;
 281
 282         spin_lock_irqsave(&dev->wl->leds_lock, flags);
 283         ledctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
 284         for (i = 0; i < B43_NR_LEDS; i++) {
 285                 led = &(dev->leds[i]);
 286                 if (led->behaviour == B43_LED_INACTIVE)
 287                         continue;
 288                 if (on)
 289                         bit_on = led->activelow ? 0 : 1;
 290                 else
 291                         bit_on = led->activelow ? 1 : 0;
 292                 if (bit_on)
 293                         ledctl |= (1 << i);
 294                 else
 295                         ledctl &= ~(1 << i);
 296         }
 297         b43_write16(dev, B43_MMIO_GPIO_CONTROL, ledctl);
 298         spin_unlock_irqrestore(&dev->wl->leds_lock, flags);
 299 }