1 /* 2 3 Broadcom B43 wireless driver 4 LED control 5 6 Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>, 7 Copyright (c) 2005 Stefano Brivio <stefano.brivio@polimi.it> 8 Copyright (c) 2005-2007 Michael Buesch <m@bues.ch> 9 Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org> 10 Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch> 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 "b43.h" 30 #include "leds.h" 31 #include "rfkill.h" 32 33 34 static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index, 35 bool activelow) 36 { 37 u16 ctl; 38 39 ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL); 40 if (activelow) 41 ctl &= ~(1 << led_index); 42 else 43 ctl |= (1 << led_index); 44 b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl); 45 } 46 47 static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index, 48 bool activelow) 49 { 50 u16 ctl; 51 52 ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL); 53 if (activelow) 54 ctl |= (1 << led_index); 55 else 56 ctl &= ~(1 << led_index); 57 b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl); 58 } 59 60 static void b43_led_update(struct b43_wldev *dev, 61 struct b43_led *led) 62 { 63 bool radio_enabled; 64 bool turn_on; 65 66 if (!led->wl) 67 return; 68 69 radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable); 70 71 /* The led->state read is racy, but we don't care. In case we raced 72 * with the brightness_set handler, we will be called again soon 73 * to fixup our state. */ 74 if (radio_enabled) 75 turn_on = atomic_read(&led->state) != LED_OFF; 76 else 77 turn_on = false; 78 if (turn_on == led->hw_state) 79 return; 80 led->hw_state = turn_on; 81 82 if (turn_on) 83 b43_led_turn_on(dev, led->index, led->activelow); 84 else 85 b43_led_turn_off(dev, led->index, led->activelow); 86 } 87 88 static void b43_leds_work(struct work_struct *work) 89 { 90 struct b43_leds *leds = container_of(work, struct b43_leds, work); 91 struct b43_wl *wl = container_of(leds, struct b43_wl, leds); 92 struct b43_wldev *dev; 93 94 mutex_lock(&wl->mutex); 95 dev = wl->current_dev; 96 if (unlikely(!dev || b43_status(dev) < B43_STAT_STARTED)) 97 goto out_unlock; 98 99 b43_led_update(dev, &wl->leds.led_tx); 100 b43_led_update(dev, &wl->leds.led_rx); 101 b43_led_update(dev, &wl->leds.led_radio); 102 b43_led_update(dev, &wl->leds.led_assoc); 103 104 out_unlock: 105 mutex_unlock(&wl->mutex); 106 } 107 108 /* Callback from the LED subsystem. */ 109 static void b43_led_brightness_set(struct led_classdev *led_dev, 110 enum led_brightness brightness) 111 { 112 struct b43_led *led = container_of(led_dev, struct b43_led, led_dev); 113 struct b43_wl *wl = led->wl; 114 115 if (likely(!wl->leds.stop)) { 116 atomic_set(&led->state, brightness); 117 ieee80211_queue_work(wl->hw, &wl->leds.work); 118 } 119 } 120 121 static int b43_register_led(struct b43_wldev *dev, struct b43_led *led, 122 const char *name, const char *default_trigger, 123 u8 led_index, bool activelow) 124 { 125 int err; 126 127 if (led->wl) 128 return -EEXIST; 129 if (!default_trigger) 130 return -EINVAL; 131 led->wl = dev->wl; 132 led->index = led_index; 133 led->activelow = activelow; 134 strlcpy(led->name, name, sizeof(led->name)); 135 atomic_set(&led->state, 0); 136 137 led->led_dev.name = led->name; 138 led->led_dev.default_trigger = default_trigger; 139 led->led_dev.brightness_set = b43_led_brightness_set; 140 141 err = led_classdev_register(dev->dev->dev, &led->led_dev); 142 if (err) { 143 b43warn(dev->wl, "LEDs: Failed to register %s\n", name); 144 led->wl = NULL; 145 return err; 146 } 147 148 return 0; 149 } 150 151 static void b43_unregister_led(struct b43_led *led) 152 { 153 if (!led->wl) 154 return; 155 led_classdev_unregister(&led->led_dev); 156 led->wl = NULL; 157 } 158 159 static void b43_map_led(struct b43_wldev *dev, 160 u8 led_index, 161 enum b43_led_behaviour behaviour, 162 bool activelow) 163 { 164 struct ieee80211_hw *hw = dev->wl->hw; 165 char name[B43_LED_MAX_NAME_LEN + 1]; 166 167 /* Map the b43 specific LED behaviour value to the 168 * generic LED triggers. */ 169 switch (behaviour) { 170 case B43_LED_INACTIVE: 171 case B43_LED_OFF: 172 case B43_LED_ON: 173 break; 174 case B43_LED_ACTIVITY: 175 case B43_LED_TRANSFER: 176 case B43_LED_APTRANSFER: 177 snprintf(name, sizeof(name), 178 "b43-%s::tx", wiphy_name(hw->wiphy)); 179 b43_register_led(dev, &dev->wl->leds.led_tx, name, 180 ieee80211_get_tx_led_name(hw), 181 led_index, activelow); 182 snprintf(name, sizeof(name), 183 "b43-%s::rx", wiphy_name(hw->wiphy)); 184 b43_register_led(dev, &dev->wl->leds.led_rx, name, 185 ieee80211_get_rx_led_name(hw), 186 led_index, activelow); 187 break; 188 case B43_LED_RADIO_ALL: 189 case B43_LED_RADIO_A: 190 case B43_LED_RADIO_B: 191 case B43_LED_MODE_BG: 192 snprintf(name, sizeof(name), 193 "b43-%s::radio", wiphy_name(hw->wiphy)); 194 b43_register_led(dev, &dev->wl->leds.led_radio, name, 195 ieee80211_get_radio_led_name(hw), 196 led_index, activelow); 197 break; 198 case B43_LED_WEIRD: 199 case B43_LED_ASSOC: 200 snprintf(name, sizeof(name), 201 "b43-%s::assoc", wiphy_name(hw->wiphy)); 202 b43_register_led(dev, &dev->wl->leds.led_assoc, name, 203 ieee80211_get_assoc_led_name(hw), 204 led_index, activelow); 205 break; 206 default: 207 b43warn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n", 208 behaviour); 209 break; 210 } 211 } 212 213 static void b43_led_get_sprominfo(struct b43_wldev *dev, 214 unsigned int led_index, 215 enum b43_led_behaviour *behaviour, 216 bool *activelow) 217 { 218 u8 sprom[4]; 219 220 sprom[0] = dev->dev->bus_sprom->gpio0; 221 sprom[1] = dev->dev->bus_sprom->gpio1; 222 sprom[2] = dev->dev->bus_sprom->gpio2; 223 sprom[3] = dev->dev->bus_sprom->gpio3; 224 225 if ((sprom[0] & sprom[1] & sprom[2] & sprom[3]) == 0xff) { 226 /* There is no LED information in the SPROM 227 * for this LED. Hardcode it here. */ 228 *activelow = false; 229 switch (led_index) { 230 case 0: 231 *behaviour = B43_LED_ACTIVITY; 232 *activelow = true; 233 if (dev->dev->board_vendor == PCI_VENDOR_ID_COMPAQ) 234 *behaviour = B43_LED_RADIO_ALL; 235 break; 236 case 1: 237 *behaviour = B43_LED_RADIO_B; 238 if (dev->dev->board_vendor == PCI_VENDOR_ID_ASUSTEK) 239 *behaviour = B43_LED_ASSOC; 240 break; 241 case 2: 242 *behaviour = B43_LED_RADIO_A; 243 break; 244 case 3: 245 *behaviour = B43_LED_OFF; 246 break; 247 default: 248 *behaviour = B43_LED_OFF; 249 B43_WARN_ON(1); 250 return; 251 } 252 } else { 253 /* keep LED disabled if no mapping is defined */ 254 if (sprom[led_index] == 0xff) 255 *behaviour = B43_LED_OFF; 256 else 257 *behaviour = sprom[led_index] & B43_LED_BEHAVIOUR; 258 *activelow = !!(sprom[led_index] & B43_LED_ACTIVELOW); 259 } 260 } 261 262 void b43_leds_init(struct b43_wldev *dev) 263 { 264 struct b43_led *led; 265 unsigned int i; 266 enum b43_led_behaviour behaviour; 267 bool activelow; 268 269 /* Sync the RF-kill LED state (if we have one) with radio and switch states. */ 270 led = &dev->wl->leds.led_radio; 271 if (led->wl) { 272 if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev)) { 273 b43_led_turn_on(dev, led->index, led->activelow); 274 led->hw_state = true; 275 atomic_set(&led->state, 1); 276 } else { 277 b43_led_turn_off(dev, led->index, led->activelow); 278 led->hw_state = false; 279 atomic_set(&led->state, 0); 280 } 281 } 282 283 /* Initialize TX/RX/ASSOC leds */ 284 led = &dev->wl->leds.led_tx; 285 if (led->wl) { 286 b43_led_turn_off(dev, led->index, led->activelow); 287 led->hw_state = false; 288 atomic_set(&led->state, 0); 289 } 290 led = &dev->wl->leds.led_rx; 291 if (led->wl) { 292 b43_led_turn_off(dev, led->index, led->activelow); 293 led->hw_state = false; 294 atomic_set(&led->state, 0); 295 } 296 led = &dev->wl->leds.led_assoc; 297 if (led->wl) { 298 b43_led_turn_off(dev, led->index, led->activelow); 299 led->hw_state = false; 300 atomic_set(&led->state, 0); 301 } 302 303 /* Initialize other LED states. */ 304 for (i = 0; i < B43_MAX_NR_LEDS; i++) { 305 b43_led_get_sprominfo(dev, i, &behaviour, &activelow); 306 switch (behaviour) { 307 case B43_LED_OFF: 308 b43_led_turn_off(dev, i, activelow); 309 break; 310 case B43_LED_ON: 311 b43_led_turn_on(dev, i, activelow); 312 break; 313 default: 314 /* Leave others as-is. */ 315 break; 316 } 317 } 318 319 dev->wl->leds.stop = 0; 320 } 321 322 void b43_leds_exit(struct b43_wldev *dev) 323 { 324 struct b43_leds *leds = &dev->wl->leds; 325 326 b43_led_turn_off(dev, leds->led_tx.index, leds->led_tx.activelow); 327 b43_led_turn_off(dev, leds->led_rx.index, leds->led_rx.activelow); 328 b43_led_turn_off(dev, leds->led_assoc.index, leds->led_assoc.activelow); 329 b43_led_turn_off(dev, leds->led_radio.index, leds->led_radio.activelow); 330 } 331 332 void b43_leds_stop(struct b43_wldev *dev) 333 { 334 struct b43_leds *leds = &dev->wl->leds; 335 336 leds->stop = 1; 337 cancel_work_sync(&leds->work); 338 } 339 340 void b43_leds_register(struct b43_wldev *dev) 341 { 342 unsigned int i; 343 enum b43_led_behaviour behaviour; 344 bool activelow; 345 346 INIT_WORK(&dev->wl->leds.work, b43_leds_work); 347 348 /* Register the LEDs to the LED subsystem. */ 349 for (i = 0; i < B43_MAX_NR_LEDS; i++) { 350 b43_led_get_sprominfo(dev, i, &behaviour, &activelow); 351 b43_map_led(dev, i, behaviour, activelow); 352 } 353 } 354 355 void b43_leds_unregister(struct b43_wl *wl) 356 { 357 struct b43_leds *leds = &wl->leds; 358 359 b43_unregister_led(&leds->led_tx); 360 b43_unregister_led(&leds->led_rx); 361 b43_unregister_led(&leds->led_assoc); 362 b43_unregister_led(&leds->led_radio); 363 } 364