f0affb781002dc2d9cafb350e322ca022b5011d6
[linux-2.6.git] / drivers / net / wireless / b43legacy / leds.c
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 "b43legacy.h"
30 #include "leds.h"
31
32
33 static void b43legacy_led_turn_on(struct b43legacy_wldev *dev, u8 led_index,
34                             bool activelow)
35 {
36         struct b43legacy_wl *wl = dev->wl;
37         unsigned long flags;
38         u16 ctl;
39
40         spin_lock_irqsave(&wl->leds_lock, flags);
41         ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
42         if (activelow)
43                 ctl &= ~(1 << led_index);
44         else
45                 ctl |= (1 << led_index);
46         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
47         spin_unlock_irqrestore(&wl->leds_lock, flags);
48 }
49
50 static void b43legacy_led_turn_off(struct b43legacy_wldev *dev, u8 led_index,
51                              bool activelow)
52 {
53         struct b43legacy_wl *wl = dev->wl;
54         unsigned long flags;
55         u16 ctl;
56
57         spin_lock_irqsave(&wl->leds_lock, flags);
58         ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
59         if (activelow)
60                 ctl |= (1 << led_index);
61         else
62                 ctl &= ~(1 << led_index);
63         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
64         spin_unlock_irqrestore(&wl->leds_lock, flags);
65 }
66
67 /* Callback from the LED subsystem. */
68 static void b43legacy_led_brightness_set(struct led_classdev *led_dev,
69                                    enum led_brightness brightness)
70 {
71         struct b43legacy_led *led = container_of(led_dev, struct b43legacy_led,
72                                     led_dev);
73         struct b43legacy_wldev *dev = led->dev;
74         bool radio_enabled;
75
76         /* Checking the radio-enabled status here is slightly racy,
77          * but we want to avoid the locking overhead and we don't care
78          * whether the LED has the wrong state for a second. */
79         radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
80
81         if (brightness == LED_OFF || !radio_enabled)
82                 b43legacy_led_turn_off(dev, led->index, led->activelow);
83         else
84                 b43legacy_led_turn_on(dev, led->index, led->activelow);
85 }
86
87 static int b43legacy_register_led(struct b43legacy_wldev *dev,
88                                   struct b43legacy_led *led,
89                                   const char *name, char *default_trigger,
90                                   u8 led_index, bool activelow)
91 {
92         int err;
93
94         b43legacy_led_turn_off(dev, led_index, activelow);
95         if (led->dev)
96                 return -EEXIST;
97         if (!default_trigger)
98                 return -EINVAL;
99         led->dev = dev;
100         led->index = led_index;
101         led->activelow = activelow;
102         strncpy(led->name, name, sizeof(led->name));
103
104         led->led_dev.name = led->name;
105         led->led_dev.default_trigger = default_trigger;
106         led->led_dev.brightness_set = b43legacy_led_brightness_set;
107
108         err = led_classdev_register(dev->dev->dev, &led->led_dev);
109         if (err) {
110                 b43legacywarn(dev->wl, "LEDs: Failed to register %s\n", name);
111                 led->dev = NULL;
112                 return err;
113         }
114         return 0;
115 }
116
117 static void b43legacy_unregister_led(struct b43legacy_led *led)
118 {
119         if (!led->dev)
120                 return;
121         led_classdev_unregister(&led->led_dev);
122         b43legacy_led_turn_off(led->dev, led->index, led->activelow);
123         led->dev = NULL;
124 }
125
126 static void b43legacy_map_led(struct b43legacy_wldev *dev,
127                         u8 led_index,
128                         enum b43legacy_led_behaviour behaviour,
129                         bool activelow)
130 {
131         struct ieee80211_hw *hw = dev->wl->hw;
132         char name[B43legacy_LED_MAX_NAME_LEN + 1];
133
134         /* Map the b43 specific LED behaviour value to the
135          * generic LED triggers. */
136         switch (behaviour) {
137         case B43legacy_LED_INACTIVE:
138                 break;
139         case B43legacy_LED_OFF:
140                 b43legacy_led_turn_off(dev, led_index, activelow);
141                 break;
142         case B43legacy_LED_ON:
143                 b43legacy_led_turn_on(dev, led_index, activelow);
144                 break;
145         case B43legacy_LED_ACTIVITY:
146         case B43legacy_LED_TRANSFER:
147         case B43legacy_LED_APTRANSFER:
148                 snprintf(name, sizeof(name),
149                          "b43legacy-%s:tx", wiphy_name(hw->wiphy));
150                 b43legacy_register_led(dev, &dev->led_tx, name,
151                                  ieee80211_get_tx_led_name(hw),
152                                  led_index, activelow);
153                 snprintf(name, sizeof(name),
154                          "b43legacy-%s:rx", wiphy_name(hw->wiphy));
155                 b43legacy_register_led(dev, &dev->led_rx, name,
156                                  ieee80211_get_rx_led_name(hw),
157                                  led_index, activelow);
158                 break;
159         case B43legacy_LED_RADIO_ALL:
160         case B43legacy_LED_RADIO_A:
161         case B43legacy_LED_RADIO_B:
162         case B43legacy_LED_MODE_BG:
163                 snprintf(name, sizeof(name),
164                          "b43legacy-%s:radio", wiphy_name(hw->wiphy));
165                 b43legacy_register_led(dev, &dev->led_radio, name,
166                                  b43legacy_rfkill_led_name(dev),
167                                  led_index, activelow);
168                 break;
169         case B43legacy_LED_WEIRD:
170         case B43legacy_LED_ASSOC:
171                 snprintf(name, sizeof(name),
172                          "b43legacy-%s:assoc", wiphy_name(hw->wiphy));
173                 b43legacy_register_led(dev, &dev->led_assoc, name,
174                                  ieee80211_get_assoc_led_name(hw),
175                                  led_index, activelow);
176                 break;
177         default:
178                 b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
179                         behaviour);
180                 break;
181         }
182 }
183
184 void b43legacy_leds_init(struct b43legacy_wldev *dev)
185 {
186         struct ssb_bus *bus = dev->dev->bus;
187         u8 sprom[4];
188         int i;
189         enum b43legacy_led_behaviour behaviour;
190         bool activelow;
191
192         sprom[0] = bus->sprom.gpio0;
193         sprom[1] = bus->sprom.gpio1;
194         sprom[2] = bus->sprom.gpio2;
195         sprom[3] = bus->sprom.gpio3;
196
197         for (i = 0; i < 4; i++) {
198                 if (sprom[i] == 0xFF) {
199                         /* There is no LED information in the SPROM
200                          * for this LED. Hardcode it here. */
201                         activelow = 0;
202                         switch (i) {
203                         case 0:
204                                 behaviour = B43legacy_LED_ACTIVITY;
205                                 activelow = 1;
206                                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
207                                         behaviour = B43legacy_LED_RADIO_ALL;
208                                 break;
209                         case 1:
210                                 behaviour = B43legacy_LED_RADIO_B;
211                                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
212                                         behaviour = B43legacy_LED_ASSOC;
213                                 break;
214                         case 2:
215                                 behaviour = B43legacy_LED_RADIO_A;
216                                 break;
217                         case 3:
218                                 behaviour = B43legacy_LED_OFF;
219                                 break;
220                         default:
221                                 B43legacy_WARN_ON(1);
222                                 return;
223                         }
224                 } else {
225                         behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
226                         activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW);
227                 }
228                 b43legacy_map_led(dev, i, behaviour, activelow);
229         }
230 }
231
232 void b43legacy_leds_exit(struct b43legacy_wldev *dev)
233 {
234         b43legacy_unregister_led(&dev->led_tx);
235         b43legacy_unregister_led(&dev->led_rx);
236         b43legacy_unregister_led(&dev->led_assoc);
237 }