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
b43_led_turn_on(struct b43_wldev * dev,u8 led_index,bool activelow)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
b43_led_turn_off(struct b43_wldev * dev,u8 led_index,bool activelow)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
b43_led_update(struct b43_wldev * dev,struct b43_led * led)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
b43_leds_work(struct work_struct * work)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. */
b43_led_brightness_set(struct led_classdev * led_dev,enum led_brightness brightness)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
b43_register_led(struct b43_wldev * dev,struct b43_led * led,const char * name,const char * default_trigger,u8 led_index,bool activelow)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 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
b43_unregister_led(struct b43_led * led)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
b43_map_led(struct b43_wldev * dev,u8 led_index,enum b43_led_behaviour behaviour,bool activelow)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
b43_led_get_sprominfo(struct b43_wldev * dev,unsigned int led_index,enum b43_led_behaviour * behaviour,bool * activelow)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
b43_leds_init(struct b43_wldev * dev)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
b43_leds_exit(struct b43_wldev * dev)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
b43_leds_stop(struct b43_wldev * dev)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
b43_leds_register(struct b43_wldev * dev)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
b43_leds_unregister(struct b43_wl * wl)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