drivers/net/wireless/bcm43xx/bcm43xx_leds.c

   1 /*
   2
   3   Broadcom BCM43xx wireless driver
   4
   5   Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
   6                      Stefano Brivio <st3@riseup.net>
   7                      Michael Buesch <mbuesch@freenet.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 "bcm43xx_leds.h"
  29 #include "bcm43xx.h"
  30
  31 #include <asm/bitops.h>
  32
  33
  34 static void bcm43xx_led_changestate(struct bcm43xx_led *led)
  35 {
  36         struct bcm43xx_private *bcm = led->bcm;
  37         const int index = bcm43xx_led_index(led);
  38         const u16 mask = (1 << index);
  39         u16 ledctl;
  40
  41         assert(index >= 0 && index < BCM43xx_NR_LEDS);
  42         assert(led->blink_interval);
  43         ledctl = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
  44         ledctl = (ledctl & mask) ? (ledctl & ~mask) : (ledctl | mask);
  45         bcm43xx_write16(bcm, BCM43xx_MMIO_GPIO_CONTROL, ledctl);
  46 }
  47
  48 static void bcm43xx_led_blink(unsigned long d)
  49 {
  50         struct bcm43xx_led *led = (struct bcm43xx_led *)d;
  51         struct bcm43xx_private *bcm = led->bcm;
  52         unsigned long flags;
  53
  54         spin_lock_irqsave(&bcm->leds_lock, flags);
  55         if (led->blink_interval) {
  56                 bcm43xx_led_changestate(led);
  57                 mod_timer(&led->blink_timer, jiffies + led->blink_interval);
  58         }
  59         spin_unlock_irqrestore(&bcm->leds_lock, flags);
  60 }
  61
  62 static void bcm43xx_led_blink_start(struct bcm43xx_led *led,
  63                                     unsigned long interval)
  64 {
  65         if (led->blink_interval)
  66                 return;
  67         led->blink_interval = interval;
  68         bcm43xx_led_changestate(led);
  69         led->blink_timer.expires = jiffies + interval;
  70         add_timer(&led->blink_timer);
  71 }
  72
  73 static void bcm43xx_led_blink_stop(struct bcm43xx_led *led, int sync)
  74 {
  75         struct bcm43xx_private *bcm = led->bcm;
  76         const int index = bcm43xx_led_index(led);
  77         u16 ledctl;
  78
  79         if (!led->blink_interval)
  80                 return;
  81         if (unlikely(sync))
  82                 del_timer_sync(&led->blink_timer);
  83         else
  84                 del_timer(&led->blink_timer);
  85         led->blink_interval = 0;
  86
  87         /* Make sure the LED is turned off. */
  88         assert(index >= 0 && index < BCM43xx_NR_LEDS);
  89         ledctl = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
  90         if (led->activelow)
  91                 ledctl |= (1 << index);
  92         else
  93                 ledctl &= ~(1 << index);
  94         bcm43xx_write16(bcm, BCM43xx_MMIO_GPIO_CONTROL, ledctl);
  95 }
  96
  97 static void bcm43xx_led_init_hardcoded(struct bcm43xx_private *bcm,
  98                                        struct bcm43xx_led *led,
  99                                        int led_index)
 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 BCM43xx_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 = BCM43xx_LED_ACTIVITY;
 111                 if (bcm->board_vendor == PCI_VENDOR_ID_COMPAQ)
 112                         led->behaviour = BCM43xx_LED_RADIO_ALL;
 113                 break;
 114         case 1:
 115                 led->behaviour = BCM43xx_LED_RADIO_B;
 116                 if (bcm->board_vendor == PCI_VENDOR_ID_ASUSTEK)
 117                         led->behaviour = BCM43xx_LED_ASSOC;
 118                 break;
 119         case 2:
 120                 led->behaviour = BCM43xx_LED_RADIO_A;
 121                 break;
 122         case 3:
 123                 led->behaviour = BCM43xx_LED_OFF;
 124                 break;
 125         default:
 126                 assert(0);
 127         }
 128 }
 129
 130 int bcm43xx_leds_init(struct bcm43xx_private *bcm)
 131 {
 132         struct bcm43xx_led *led;
 133         u8 sprom[4];
 134         int i;
 135
 136         sprom[0] = bcm->sprom.wl0gpio0;
 137         sprom[1] = bcm->sprom.wl0gpio1;
 138         sprom[2] = bcm->sprom.wl0gpio2;
 139         sprom[3] = bcm->sprom.wl0gpio3;
 140
 141         for (i = 0; i < BCM43xx_NR_LEDS; i++) {
 142                 led = &(bcm->leds[i]);
 143                 led->bcm = bcm;
 144                 setup_timer(&led->blink_timer,
 145                             bcm43xx_led_blink,
 146                             (unsigned long)led);
 147
 148                 if (sprom[i] == 0xFF) {
 149                         bcm43xx_led_init_hardcoded(bcm, led, i);
 150                 } else {
 151                         led->behaviour = sprom[i] & BCM43xx_LED_BEHAVIOUR;
 152                         led->activelow = !!(sprom[i] & BCM43xx_LED_ACTIVELOW);
 153                 }
 154         }
 155
 156         return 0;
 157 }
 158
 159 void bcm43xx_leds_exit(struct bcm43xx_private *bcm)
 160 {
 161         struct bcm43xx_led *led;
 162         int i;
 163
 164         for (i = 0; i < BCM43xx_NR_LEDS; i++) {
 165                 led = &(bcm->leds[i]);
 166                 bcm43xx_led_blink_stop(led, 1);
 167         }
 168         bcm43xx_leds_switch_all(bcm, 0);
 169 }
 170
 171 void bcm43xx_leds_update(struct bcm43xx_private *bcm, int activity)
 172 {
 173         struct bcm43xx_led *led;
 174         struct bcm43xx_radioinfo *radio = bcm43xx_current_radio(bcm);
 175         struct bcm43xx_phyinfo *phy = bcm43xx_current_phy(bcm);
 176         const int transferring = (jiffies - bcm->stats.last_tx) < BCM43xx_LED_XFER_THRES;
 177         int i, turn_on;
 178         unsigned long interval = 0;
 179         u16 ledctl;
 180         unsigned long flags;
 181
 182         spin_lock_irqsave(&bcm->leds_lock, flags);
 183         ledctl = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
 184         for (i = 0; i < BCM43xx_NR_LEDS; i++) {
 185                 led = &(bcm->leds[i]);
 186
 187                 turn_on = 0;
 188                 switch (led->behaviour) {
 189                 case BCM43xx_LED_INACTIVE:
 190                         continue;
 191                 case BCM43xx_LED_OFF:
 192                         break;
 193                 case BCM43xx_LED_ON:
 194                         turn_on = 1;
 195                         break;
 196                 case BCM43xx_LED_ACTIVITY:
 197                         turn_on = activity;
 198                         break;
 199                 case BCM43xx_LED_RADIO_ALL:
 200                         turn_on = radio->enabled;
 201                         break;
 202                 case BCM43xx_LED_RADIO_A:
 203                         turn_on = (radio->enabled && phy->type == BCM43xx_PHYTYPE_A);
 204                         break;
 205                 case BCM43xx_LED_RADIO_B:
 206                         turn_on = (radio->enabled &&
 207                                    (phy->type == BCM43xx_PHYTYPE_B ||
 208                                     phy->type == BCM43xx_PHYTYPE_G));
 209                         break;
 210                 case BCM43xx_LED_MODE_BG:
 211                         if (phy->type == BCM43xx_PHYTYPE_G &&
 212                             1/*FIXME: using G rates.*/)
 213                                 turn_on = 1;
 214                         break;
 215                 case BCM43xx_LED_TRANSFER:
 216                         if (transferring)
 217                                 bcm43xx_led_blink_start(led, BCM43xx_LEDBLINK_MEDIUM);
 218                         else
 219                                 bcm43xx_led_blink_stop(led, 0);
 220                         continue;
 221                 case BCM43xx_LED_APTRANSFER:
 222                         if (bcm->ieee->iw_mode == IW_MODE_MASTER) {
 223                                 if (transferring) {
 224                                         interval = BCM43xx_LEDBLINK_FAST;
 225                                         turn_on = 1;
 226                                 }
 227                         } else {
 228                                 turn_on = 1;
 229                                 if (0/*TODO: not assoc*/)
 230                                         interval = BCM43xx_LEDBLINK_SLOW;
 231                                 else if (transferring)
 232                                         interval = BCM43xx_LEDBLINK_FAST;
 233                                 else
 234                                         turn_on = 0;
 235                         }
 236                         if (turn_on)
 237                                 bcm43xx_led_blink_start(led, interval);
 238                         else
 239                                 bcm43xx_led_blink_stop(led, 0);
 240                         continue;
 241                 case BCM43xx_LED_WEIRD:
 242                         //TODO
 243                         break;
 244                 case BCM43xx_LED_ASSOC:
 245                         if (bcm->softmac->associated)
 246                                 turn_on = 1;
 247                         break;
 248 #ifdef CONFIG_BCM43XX_DEBUG
 249                 case BCM43xx_LED_TEST_BLINKSLOW:
 250                         bcm43xx_led_blink_start(led, BCM43xx_LEDBLINK_SLOW);
 251                         continue;
 252                 case BCM43xx_LED_TEST_BLINKMEDIUM:
 253                         bcm43xx_led_blink_start(led, BCM43xx_LEDBLINK_MEDIUM);
 254                         continue;
 255                 case BCM43xx_LED_TEST_BLINKFAST:
 256                         bcm43xx_led_blink_start(led, BCM43xx_LEDBLINK_FAST);
 257                         continue;
 258 #endif /* CONFIG_BCM43XX_DEBUG */
 259                 default:
 260                         assert(0);
 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         bcm43xx_write16(bcm, BCM43xx_MMIO_GPIO_CONTROL, ledctl);
 271         spin_unlock_irqrestore(&bcm->leds_lock, flags);
 272 }
 273
 274 void bcm43xx_leds_switch_all(struct bcm43xx_private *bcm, int on)
 275 {
 276         struct bcm43xx_led *led;
 277         u16 ledctl;
 278         int i;
 279         int bit_on;
 280         unsigned long flags;
 281
 282         spin_lock_irqsave(&bcm->leds_lock, flags);
 283         ledctl = bcm43xx_read16(bcm, BCM43xx_MMIO_GPIO_CONTROL);
 284         for (i = 0; i < BCM43xx_NR_LEDS; i++) {
 285                 led = &(bcm->leds[i]);
 286                 if (led->behaviour == BCM43xx_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         bcm43xx_write16(bcm, BCM43xx_MMIO_GPIO_CONTROL, ledctl);
 298         spin_unlock_irqrestore(&bcm->leds_lock, flags);
 299 }