Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.25
[linux-2.6] / drivers / net / wireless / b43 / 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 "b43.h"
30 #include "leds.h"
31
32
33 static void b43_led_turn_on(struct b43_wldev *dev, u8 led_index,
34                             bool activelow)
35 {
36         struct b43_wl *wl = dev->wl;
37         unsigned long flags;
38         u16 ctl;
39
40         spin_lock_irqsave(&wl->leds_lock, flags);
41         ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
42         if (activelow)
43                 ctl &= ~(1 << led_index);
44         else
45                 ctl |= (1 << led_index);
46         b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
47         spin_unlock_irqrestore(&wl->leds_lock, flags);
48 }
49
50 static void b43_led_turn_off(struct b43_wldev *dev, u8 led_index,
51                              bool activelow)
52 {
53         struct b43_wl *wl = dev->wl;
54         unsigned long flags;
55         u16 ctl;
56
57         spin_lock_irqsave(&wl->leds_lock, flags);
58         ctl = b43_read16(dev, B43_MMIO_GPIO_CONTROL);
59         if (activelow)
60                 ctl |= (1 << led_index);
61         else
62                 ctl &= ~(1 << led_index);
63         b43_write16(dev, B43_MMIO_GPIO_CONTROL, ctl);
64         spin_unlock_irqrestore(&wl->leds_lock, flags);
65 }
66
67 /* Callback from the LED subsystem. */
68 static void b43_led_brightness_set(struct led_classdev *led_dev,
69                                    enum led_brightness brightness)
70 {
71         struct b43_led *led = container_of(led_dev, struct b43_led, led_dev);
72         struct b43_wldev *dev = led->dev;
73         bool radio_enabled;
74
75         /* Checking the radio-enabled status here is slightly racy,
76          * but we want to avoid the locking overhead and we don't care
77          * whether the LED has the wrong state for a second. */
78         radio_enabled = (dev->phy.radio_on && dev->radio_hw_enable);
79
80         if (brightness == LED_OFF || !radio_enabled)
81                 b43_led_turn_off(dev, led->index, led->activelow);
82         else
83                 b43_led_turn_on(dev, led->index, led->activelow);
84 }
85
86 static int b43_register_led(struct b43_wldev *dev, struct b43_led *led,
87                             const char *name, char *default_trigger,
88                             u8 led_index, bool activelow)
89 {
90         int err;
91
92         b43_led_turn_off(dev, led_index, activelow);
93         if (led->dev)
94                 return -EEXIST;
95         if (!default_trigger)
96                 return -EINVAL;
97         led->dev = dev;
98         led->index = led_index;
99         led->activelow = activelow;
100         strncpy(led->name, name, sizeof(led->name));
101
102         led->led_dev.name = led->name;
103         led->led_dev.default_trigger = default_trigger;
104         led->led_dev.brightness_set = b43_led_brightness_set;
105
106         err = led_classdev_register(dev->dev->dev, &led->led_dev);
107         if (err) {
108                 b43warn(dev->wl, "LEDs: Failed to register %s\n", name);
109                 led->dev = NULL;
110                 return err;
111         }
112         return 0;
113 }
114
115 static void b43_unregister_led(struct b43_led *led)
116 {
117         if (!led->dev)
118                 return;
119         led_classdev_unregister(&led->led_dev);
120         b43_led_turn_off(led->dev, led->index, led->activelow);
121         led->dev = NULL;
122 }
123
124 static void b43_map_led(struct b43_wldev *dev,
125                         u8 led_index,
126                         enum b43_led_behaviour behaviour,
127                         bool activelow)
128 {
129         struct ieee80211_hw *hw = dev->wl->hw;
130         char name[B43_LED_MAX_NAME_LEN + 1];
131
132         /* Map the b43 specific LED behaviour value to the
133          * generic LED triggers. */
134         switch (behaviour) {
135         case B43_LED_INACTIVE:
136                 break;
137         case B43_LED_OFF:
138                 b43_led_turn_off(dev, led_index, activelow);
139                 break;
140         case B43_LED_ON:
141                 b43_led_turn_on(dev, led_index, activelow);
142                 break;
143         case B43_LED_ACTIVITY:
144         case B43_LED_TRANSFER:
145         case B43_LED_APTRANSFER:
146                 snprintf(name, sizeof(name),
147                          "b43-%s:tx", wiphy_name(hw->wiphy));
148                 b43_register_led(dev, &dev->led_tx, name,
149                                  ieee80211_get_tx_led_name(hw),
150                                  led_index, activelow);
151                 snprintf(name, sizeof(name),
152                          "b43-%s:rx", wiphy_name(hw->wiphy));
153                 b43_register_led(dev, &dev->led_rx, name,
154                                  ieee80211_get_rx_led_name(hw),
155                                  led_index, activelow);
156                 break;
157         case B43_LED_RADIO_ALL:
158         case B43_LED_RADIO_A:
159         case B43_LED_RADIO_B:
160         case B43_LED_MODE_BG:
161                 snprintf(name, sizeof(name),
162                          "b43-%s:radio", wiphy_name(hw->wiphy));
163                 b43_register_led(dev, &dev->led_radio, name,
164                                  b43_rfkill_led_name(dev),
165                                  led_index, activelow);
166                 /* Sync the RF-kill LED state with the switch state. */
167                 if (dev->radio_hw_enable)
168                         b43_led_turn_on(dev, led_index, activelow);
169                 break;
170         case B43_LED_WEIRD:
171         case B43_LED_ASSOC:
172                 snprintf(name, sizeof(name),
173                          "b43-%s:assoc", wiphy_name(hw->wiphy));
174                 b43_register_led(dev, &dev->led_assoc, name,
175                                  ieee80211_get_assoc_led_name(hw),
176                                  led_index, activelow);
177                 break;
178         default:
179                 b43warn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n",
180                         behaviour);
181                 break;
182         }
183 }
184
185 void b43_leds_init(struct b43_wldev *dev)
186 {
187         struct ssb_bus *bus = dev->dev->bus;
188         u8 sprom[4];
189         int i;
190         enum b43_led_behaviour behaviour;
191         bool activelow;
192
193         sprom[0] = bus->sprom.gpio0;
194         sprom[1] = bus->sprom.gpio1;
195         sprom[2] = bus->sprom.gpio2;
196         sprom[3] = bus->sprom.gpio3;
197
198         for (i = 0; i < 4; i++) {
199                 if (sprom[i] == 0xFF) {
200                         /* There is no LED information in the SPROM
201                          * for this LED. Hardcode it here. */
202                         activelow = 0;
203                         switch (i) {
204                         case 0:
205                                 behaviour = B43_LED_ACTIVITY;
206                                 activelow = 1;
207                                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ)
208                                         behaviour = B43_LED_RADIO_ALL;
209                                 break;
210                         case 1:
211                                 behaviour = B43_LED_RADIO_B;
212                                 if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK)
213                                         behaviour = B43_LED_ASSOC;
214                                 break;
215                         case 2:
216                                 behaviour = B43_LED_RADIO_A;
217                                 break;
218                         case 3:
219                                 behaviour = B43_LED_OFF;
220                                 break;
221                         default:
222                                 B43_WARN_ON(1);
223                                 return;
224                         }
225                 } else {
226                         behaviour = sprom[i] & B43_LED_BEHAVIOUR;
227                         activelow = !!(sprom[i] & B43_LED_ACTIVELOW);
228                 }
229                 b43_map_led(dev, i, behaviour, activelow);
230         }
231 }
232
233 void b43_leds_exit(struct b43_wldev *dev)
234 {
235         b43_unregister_led(&dev->led_tx);
236         b43_unregister_led(&dev->led_rx);
237         b43_unregister_led(&dev->led_assoc);
238         b43_unregister_led(&dev->led_radio);
239 }