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 "b43legacy.h"
30 #include "leds.h"
31 #include "rfkill.h"
32
33
b43legacy_led_turn_on(struct b43legacy_wldev * dev,u8 led_index,bool activelow)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
b43legacy_led_turn_off(struct b43legacy_wldev * dev,u8 led_index,bool activelow)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. */
b43legacy_led_brightness_set(struct led_classdev * led_dev,enum led_brightness brightness)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
b43legacy_register_led(struct b43legacy_wldev * dev,struct b43legacy_led * led,const char * name,const char * default_trigger,u8 led_index,bool activelow)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
b43legacy_unregister_led(struct b43legacy_led * led)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
b43legacy_map_led(struct b43legacy_wldev * dev,u8 led_index,enum b43legacy_led_behaviour behaviour,bool activelow)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
b43legacy_leds_init(struct b43legacy_wldev * dev)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 = false;
207 switch (i) {
208 case 0:
209 behaviour = B43legacy_LED_ACTIVITY;
210 activelow = true;
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
b43legacy_leds_exit(struct b43legacy_wldev * dev)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 }
244