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 <mb@bu3sch.de> 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 34static 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 47static 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 60static 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 = 0; 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 88static 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 104out_unlock: 105 mutex_unlock(&wl->mutex); 106} 107 108/* Callback from the LED subsystem. */ 109static 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 121static 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 strncpy(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 151static 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 159static 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 213static 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 struct ssb_bus *bus = dev->dev->bus; 219 u8 sprom[4]; 220 221 sprom[0] = bus->sprom.gpio0; 222 sprom[1] = bus->sprom.gpio1; 223 sprom[2] = bus->sprom.gpio2; 224 sprom[3] = bus->sprom.gpio3; 225 226 if (sprom[led_index] == 0xFF) { 227 /* There is no LED information in the SPROM 228 * for this LED. Hardcode it here. */ 229 *activelow = 0; 230 switch (led_index) { 231 case 0: 232 *behaviour = B43_LED_ACTIVITY; 233 *activelow = 1; 234 if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ) 235 *behaviour = B43_LED_RADIO_ALL; 236 break; 237 case 1: 238 *behaviour = B43_LED_RADIO_B; 239 if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK) 240 *behaviour = B43_LED_ASSOC; 241 break; 242 case 2: 243 *behaviour = B43_LED_RADIO_A; 244 break; 245 case 3: 246 *behaviour = B43_LED_OFF; 247 break; 248 default: 249 *behaviour = B43_LED_OFF; 250 B43_WARN_ON(1); 251 return; 252 } 253 } else { 254 *behaviour = sprom[led_index] & B43_LED_BEHAVIOUR; 255 *activelow = !!(sprom[led_index] & B43_LED_ACTIVELOW); 256 } 257} 258 259void b43_leds_init(struct b43_wldev *dev) 260{ 261 struct b43_led *led; 262 unsigned int i; 263 enum b43_led_behaviour behaviour; 264 bool activelow; 265 266 /* Sync the RF-kill LED state (if we have one) with radio and switch states. */ 267 led = &dev->wl->leds.led_radio; 268 if (led->wl) { 269 if (dev->phy.radio_on && b43_is_hw_radio_enabled(dev)) { 270 b43_led_turn_on(dev, led->index, led->activelow); 271 led->hw_state = 1; 272 atomic_set(&led->state, 1); 273 } else { 274 b43_led_turn_off(dev, led->index, led->activelow); 275 led->hw_state = 0; 276 atomic_set(&led->state, 0); 277 } 278 } 279 280 /* Initialize TX/RX/ASSOC leds */ 281 led = &dev->wl->leds.led_tx; 282 if (led->wl) { 283 b43_led_turn_off(dev, led->index, led->activelow); 284 led->hw_state = 0; 285 atomic_set(&led->state, 0); 286 } 287 led = &dev->wl->leds.led_rx; 288 if (led->wl) { 289 b43_led_turn_off(dev, led->index, led->activelow); 290 led->hw_state = 0; 291 atomic_set(&led->state, 0); 292 } 293 led = &dev->wl->leds.led_assoc; 294 if (led->wl) { 295 b43_led_turn_off(dev, led->index, led->activelow); 296 led->hw_state = 0; 297 atomic_set(&led->state, 0); 298 } 299 300 /* Initialize other LED states. */ 301 for (i = 0; i < B43_MAX_NR_LEDS; i++) { 302 b43_led_get_sprominfo(dev, i, &behaviour, &activelow); 303 switch (behaviour) { 304 case B43_LED_OFF: 305 b43_led_turn_off(dev, i, activelow); 306 break; 307 case B43_LED_ON: 308 b43_led_turn_on(dev, i, activelow); 309 break; 310 default: 311 /* Leave others as-is. */ 312 break; 313 } 314 } 315 316 dev->wl->leds.stop = 0; 317} 318 319void b43_leds_exit(struct b43_wldev *dev) 320{ 321 struct b43_leds *leds = &dev->wl->leds; 322 323 b43_led_turn_off(dev, leds->led_tx.index, leds->led_tx.activelow); 324 b43_led_turn_off(dev, leds->led_rx.index, leds->led_rx.activelow); 325 b43_led_turn_off(dev, leds->led_assoc.index, leds->led_assoc.activelow); 326 b43_led_turn_off(dev, leds->led_radio.index, leds->led_radio.activelow); 327} 328 329void b43_leds_stop(struct b43_wldev *dev) 330{ 331 struct b43_leds *leds = &dev->wl->leds; 332 333 leds->stop = 1; 334 cancel_work_sync(&leds->work); 335} 336 337void b43_leds_register(struct b43_wldev *dev) 338{ 339 unsigned int i; 340 enum b43_led_behaviour behaviour; 341 bool activelow; 342 343 INIT_WORK(&dev->wl->leds.work, b43_leds_work); 344 345 /* Register the LEDs to the LED subsystem. */ 346 for (i = 0; i < B43_MAX_NR_LEDS; i++) { 347 b43_led_get_sprominfo(dev, i, &behaviour, &activelow); 348 b43_map_led(dev, i, behaviour, activelow); 349 } 350} 351 352void b43_leds_unregister(struct b43_wl *wl) 353{ 354 struct b43_leds *leds = &wl->leds; 355 356 b43_unregister_led(&leds->led_tx); 357 b43_unregister_led(&leds->led_rx); 358 b43_unregister_led(&leds->led_assoc); 359 b43_unregister_led(&leds->led_radio); 360} 361