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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 | /* Sync the RF-kill LED state with the switch state. */ | |
169 | if (dev->radio_hw_enable) | |
170 | b43legacy_led_turn_on(dev, led_index, activelow); | |
171 | break; | |
172 | case B43legacy_LED_WEIRD: | |
173 | case B43legacy_LED_ASSOC: | |
174 | snprintf(name, sizeof(name), | |
175 | "b43legacy-%s::assoc", wiphy_name(hw->wiphy)); | |
176 | b43legacy_register_led(dev, &dev->led_assoc, name, | |
177 | ieee80211_get_assoc_led_name(hw), | |
178 | led_index, activelow); | |
179 | break; | |
180 | default: | |
181 | b43legacywarn(dev->wl, "LEDs: Unknown behaviour 0x%02X\n", | |
182 | behaviour); | |
183 | break; | |
184 | } | |
185 | } | |
186 | ||
187 | void b43legacy_leds_init(struct b43legacy_wldev *dev) | |
188 | { | |
189 | struct ssb_bus *bus = dev->dev->bus; | |
190 | u8 sprom[4]; | |
191 | int i; | |
192 | enum b43legacy_led_behaviour behaviour; | |
193 | bool activelow; | |
194 | ||
195 | sprom[0] = bus->sprom.gpio0; | |
196 | sprom[1] = bus->sprom.gpio1; | |
197 | sprom[2] = bus->sprom.gpio2; | |
198 | sprom[3] = bus->sprom.gpio3; | |
199 | ||
200 | for (i = 0; i < 4; i++) { | |
201 | if (sprom[i] == 0xFF) { | |
202 | /* There is no LED information in the SPROM | |
203 | * for this LED. Hardcode it here. */ | |
204 | activelow = 0; | |
205 | switch (i) { | |
206 | case 0: | |
207 | behaviour = B43legacy_LED_ACTIVITY; | |
208 | activelow = 1; | |
209 | if (bus->boardinfo.vendor == PCI_VENDOR_ID_COMPAQ) | |
210 | behaviour = B43legacy_LED_RADIO_ALL; | |
211 | break; | |
212 | case 1: | |
213 | behaviour = B43legacy_LED_RADIO_B; | |
214 | if (bus->boardinfo.vendor == PCI_VENDOR_ID_ASUSTEK) | |
215 | behaviour = B43legacy_LED_ASSOC; | |
216 | break; | |
217 | case 2: | |
218 | behaviour = B43legacy_LED_RADIO_A; | |
219 | break; | |
220 | case 3: | |
221 | behaviour = B43legacy_LED_OFF; | |
222 | break; | |
223 | default: | |
224 | B43legacy_WARN_ON(1); | |
225 | return; | |
226 | } | |
227 | } else { | |
228 | behaviour = sprom[i] & B43legacy_LED_BEHAVIOUR; | |
229 | activelow = !!(sprom[i] & B43legacy_LED_ACTIVELOW); | |
230 | } | |
231 | b43legacy_map_led(dev, i, behaviour, activelow); | |
232 | } | |
233 | } | |
234 | ||
235 | void b43legacy_leds_exit(struct b43legacy_wldev *dev) | |
236 | { | |
237 | b43legacy_unregister_led(&dev->led_tx); | |
238 | b43legacy_unregister_led(&dev->led_rx); | |
239 | b43legacy_unregister_led(&dev->led_assoc); | |
240 | b43legacy_unregister_led(&dev->led_radio); | |
241 | } |