Merge commit 'linux-pnfs/nfs41-for-2.6.31' into nfsv41-for-2.6.31
[pandora-kernel.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 #include "rfkill.h"
32
33
34 static void b43legacy_led_turn_on(struct b43legacy_wldev *dev, u8 led_index,
35                             bool activelow)
36 {
37         struct b43legacy_wl *wl = dev->wl;
38         unsigned long flags;
39         u16 ctl;
40
41         spin_lock_irqsave(&wl->leds_lock, flags);
42         ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
43         if (activelow)
44                 ctl &= ~(1 << led_index);
45         else
46                 ctl |= (1 << led_index);
47         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
48         spin_unlock_irqrestore(&wl->leds_lock, flags);
49 }
50
51 static void b43legacy_led_turn_off(struct b43legacy_wldev *dev, u8 led_index,
52                              bool activelow)
53 {
54         struct b43legacy_wl *wl = dev->wl;
55         unsigned long flags;
56         u16 ctl;
57
58         spin_lock_irqsave(&wl->leds_lock, flags);
59         ctl = b43legacy_read16(dev, B43legacy_MMIO_GPIO_CONTROL);
60         if (activelow)
61                 ctl |= (1 << led_index);
62         else
63                 ctl &= ~(1 << led_index);
64         b43legacy_write16(dev, B43legacy_MMIO_GPIO_CONTROL, ctl);
65         spin_unlock_irqrestore(&wl->leds_lock, flags);
66 }
67
68 /* Callback from the LED subsystem. */
69 static void b43legacy_led_brightness_set(struct led_classdev *led_dev,
70                                    enum led_brightness brightness)
71 {
72         struct b43legacy_led *led = container_of(led_dev, struct b43legacy_led,
73                                     led_dev);
74         struct b43legacy_wldev *dev = led->dev;
75         bool radio_enabled;
76
77         /* Checking the radio-enabled status here is slightly racy,
78          * but we want to avoid the locking overhead and we don't care
79          * whether the LED has the wrong state for a second. */
80         radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
81
82         if (brightness == LED_OFF || !radio_enabled)
83                 b43legacy_led_turn_off(dev, led->index, led->activelow);
84         else
85                 b43legacy_led_turn_on(dev, led->index, led->activelow);
86 }
87
88 static int b43legacy_register_led(struct b43legacy_wldev *dev,
89                                   struct b43legacy_led *led,
90                                   const char *name,
91                                   const char *default_trigger,
92                                   u8 led_index, bool activelow)
93 {
94         int err;
95
96         b43legacy_led_turn_off(dev, led_index, activelow);
97         if (led->dev)
98                 return -EEXIST;
99         if (!default_trigger)
100                 return -EINVAL;
101         led->dev = dev;
102         led->index = led_index;
103         led->activelow = activelow;
104         strncpy(led->name, name, sizeof(led->name));
105
106         led->led_dev.name = led->name;
107         led->led_dev.default_trigger = default_trigger;
108         led->led_dev.brightness_set = b43legacy_led_brightness_set;
109
110         err = led_classdev_register(dev->dev->dev, &led->led_dev);
111         if (err) {
112                 b43legacywarn(dev->wl, "LEDs: Failed to register %s\n", name);
113                 led->dev = NULL;
114                 return err;
115         }
116         return 0;
117 }
118
119 static void b43legacy_unregister_led(struct b43legacy_led *led)
120 {
121         if (!led->dev)
122                 return;
123         led_classdev_unregister(&led->led_dev);
124         b43legacy_led_turn_off(led->dev, led->index, led->activelow);
125         led->dev = NULL;
126 }
127
128 static void b43legacy_map_led(struct b43legacy_wldev *dev,
129                         u8 led_index,
130                         enum b43legacy_led_behaviour behaviour,
131                         bool activelow)
132 {
133         struct ieee80211_hw *hw = dev->wl->hw;
134         char name[B43legacy_LED_MAX_NAME_LEN + 1];
135
136         /* Map the b43 specific LED behaviour value to the
137          * generic LED triggers. */
138         switch (behaviour) {
139         case B43legacy_LED_INACTIVE:
140                 break;
141         case B43legacy_LED_OFF:
142                 b43legacy_led_turn_off(dev, led_index, activelow);
143                 break;
144         case B43legacy_LED_ON:
145                 b43legacy_led_turn_on(dev, led_index, activelow);
146                 break;
147         case B43legacy_LED_ACTIVITY:
148         case B43legacy_LED_TRANSFER:
149         case B43legacy_LED_APTRANSFER:
150                 snprintf(name, sizeof(name),
151                          "b43legacy-%s::tx", wiphy_name(hw->wiphy));
152                 b43legacy_register_led(dev, &dev->led_tx, name,
153                                  ieee80211_get_tx_led_name(hw),
154                                  led_index, activelow);
155                 snprintf(name, sizeof(name),
156                          "b43legacy-%s::rx", wiphy_name(hw->wiphy));
157                 b43legacy_register_led(dev, &dev->led_rx, name,
158                                  ieee80211_get_rx_led_name(hw),
159                                  led_index, activelow);
160                 break;
161         case B43legacy_LED_RADIO_ALL:
162         case B43legacy_LED_RADIO_A:
163         case B43legacy_LED_RADIO_B:
164         case B43legacy_LED_MODE_BG:
165                 snprintf(name, sizeof(name),
166                          "b43legacy-%s::radio", wiphy_name(hw->wiphy));
167                 b43legacy_register_led(dev, &dev->led_radio, name,
168                                  ieee80211_get_radio_led_name(hw),
169                                  led_index, activelow);
170                 /* Sync the RF-kill LED state with radio and switch states. */
171                 if (dev->phy.radio_on && b43legacy_is_hw_radio_enabled(dev))
172                         b43legacy_led_turn_on(dev, led_index, activelow);
173                 break;
174         case B43legacy_LED_WEIRD:
175         case B43legacy_LED_ASSOC:
176                 snprintf(name, sizeof(name),
177                          "b43legacy-%s::assoc", wiphy_name(hw->wiphy));
178                 b43legacy_register_led(dev, &dev->led_assoc, name,
179                                  ieee80211_get_assoc_led_name(hw),
180                                  led_index, activelow);
181                 break;
182         default:
183                 b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
184                         behaviour);
185                 break;
186         }
187 }
188
189 void b43legacy_leds_init(struct b43legacy_wldev *dev)
190 {
191         struct ssb_bus *bus = dev->dev->bus;
192         u8 sprom[4];
193         int i;
194         enum b43legacy_led_behaviour behaviour;
195         bool activelow;
196
197         sprom[0] = bus->sprom.gpio0;
198         sprom[1] = bus->sprom.gpio1;
199         sprom[2] = bus->sprom.gpio2;
200         sprom[3] = bus->sprom.gpio3;
201
202         for (i = 0; i < 4; i++) {
203                 if (sprom[i] == 0xFF) {
204                         /* There is no LED information in the SPROM
205                          * for this LED. Hardcode it here. */
206                         activelow = 0;
207                         switch (i) {
208                         case 0:
209                                 behaviour = B43legacy_LED_ACTIVITY;
210                                 activelow = 1;
211                                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
212                                         behaviour = B43legacy_LED_RADIO_ALL;
213                                 break;
214                         case 1:
215                                 behaviour = B43legacy_LED_RADIO_B;
216                                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
217                                         behaviour = B43legacy_LED_ASSOC;
218                                 break;
219                         case 2:
220                                 behaviour = B43legacy_LED_RADIO_A;
221                                 break;
222                         case 3:
223                                 behaviour = B43legacy_LED_OFF;
224                                 break;
225                         default:
226                                 B43legacy_WARN_ON(1);
227                                 return;
228                         }
229                 } else {
230                         behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR;
231                         activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW);
232                 }
233                 b43legacy_map_led(dev, i, behaviour, activelow);
234         }
235 }
236
237 void b43legacy_leds_exit(struct b43legacy_wldev *dev)
238 {
239         b43legacy_unregister_led(&dev->led_tx);
240         b43legacy_unregister_led(&dev->led_rx);
241         b43legacy_unregister_led(&dev->led_assoc);
242         b43legacy_unregister_led(&dev->led_radio);
243 }