Commit | Line | Data |
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93bb7f3a LF |
1 | /* |
2 | ||
6be50837 | 3 | Broadcom B43 wireless driver |
93bb7f3a LF |
4 | RFKILL support |
5 | ||
6 | Copyright (c) 2007 Michael Buesch <mb@bu3sch.de> | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor, | |
21 | Boston, MA 02110-1301, USA. | |
22 | ||
23 | */ | |
24 | ||
25 | #include "rfkill.h" | |
26 | #include "radio.h" | |
27 | #include "b43legacy.h" | |
28 | ||
4ad36d78 LF |
29 | #include <linux/kmod.h> |
30 | ||
93bb7f3a | 31 | |
6be50837 LF |
32 | /* Returns TRUE, if the radio is enabled in hardware. */ |
33 | static bool b43legacy_is_hw_radio_enabled(struct b43legacy_wldev *dev) | |
93bb7f3a | 34 | { |
6be50837 LF |
35 | if (dev->phy.rev >= 3) { |
36 | if (!(b43legacy_read32(dev, B43legacy_MMIO_RADIO_HWENABLED_HI) | |
37 | & B43legacy_MMIO_RADIO_HWENABLED_HI_MASK)) | |
38 | return 1; | |
39 | } else { | |
40 | if (b43legacy_read16(dev, B43legacy_MMIO_RADIO_HWENABLED_LO) | |
41 | & B43legacy_MMIO_RADIO_HWENABLED_LO_MASK) | |
42 | return 1; | |
93bb7f3a | 43 | } |
6be50837 | 44 | return 0; |
93bb7f3a LF |
45 | } |
46 | ||
6be50837 LF |
47 | /* The poll callback for the hardware button. */ |
48 | static void b43legacy_rfkill_poll(struct input_polled_dev *poll_dev) | |
93bb7f3a | 49 | { |
6be50837 | 50 | struct b43legacy_wldev *dev = poll_dev->private; |
93bb7f3a | 51 | struct b43legacy_wl *wl = dev->wl; |
6be50837 | 52 | bool enabled; |
db9683fb | 53 | bool report_change = 0; |
93bb7f3a | 54 | |
6be50837 | 55 | mutex_lock(&wl->mutex); |
4ad36d78 LF |
56 | if (unlikely(b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)) { |
57 | mutex_unlock(&wl->mutex); | |
58 | return; | |
59 | } | |
6be50837 LF |
60 | enabled = b43legacy_is_hw_radio_enabled(dev); |
61 | if (unlikely(enabled != dev->radio_hw_enable)) { | |
62 | dev->radio_hw_enable = enabled; | |
db9683fb | 63 | report_change = 1; |
6be50837 LF |
64 | b43legacyinfo(wl, "Radio hardware status changed to %s\n", |
65 | enabled ? "ENABLED" : "DISABLED"); | |
db9683fb SB |
66 | } |
67 | mutex_unlock(&wl->mutex); | |
68 | ||
4ad36d78 LF |
69 | /* send the radio switch event to the system - note both a key press |
70 | * and a release are required */ | |
71 | if (unlikely(report_change)) { | |
72 | input_report_key(poll_dev->input, KEY_WLAN, 1); | |
73 | input_report_key(poll_dev->input, KEY_WLAN, 0); | |
74 | } | |
93bb7f3a LF |
75 | } |
76 | ||
77 | /* Called when the RFKILL toggled in software. | |
78 | * This is called without locking. */ | |
79 | static int b43legacy_rfkill_soft_toggle(void *data, enum rfkill_state state) | |
80 | { | |
81 | struct b43legacy_wldev *dev = data; | |
82 | struct b43legacy_wl *wl = dev->wl; | |
4ad36d78 | 83 | int err = -EBUSY; |
93bb7f3a | 84 | |
db9683fb SB |
85 | if (!wl->rfkill.registered) |
86 | return 0; | |
93bb7f3a | 87 | |
db9683fb | 88 | mutex_lock(&wl->mutex); |
4ad36d78 LF |
89 | if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) |
90 | goto out_unlock; | |
91 | err = 0; | |
93bb7f3a | 92 | switch (state) { |
ff28bd94 | 93 | case RFKILL_STATE_UNBLOCKED: |
93bb7f3a LF |
94 | if (!dev->radio_hw_enable) { |
95 | /* No luck. We can't toggle the hardware RF-kill | |
96 | * button from software. */ | |
97 | err = -EBUSY; | |
98 | goto out_unlock; | |
99 | } | |
100 | if (!dev->phy.radio_on) | |
101 | b43legacy_radio_turn_on(dev); | |
102 | break; | |
ff28bd94 | 103 | case RFKILL_STATE_SOFT_BLOCKED: |
93bb7f3a LF |
104 | if (dev->phy.radio_on) |
105 | b43legacy_radio_turn_off(dev, 0); | |
106 | break; | |
ff28bd94 JL |
107 | default: |
108 | b43legacywarn(wl, "Received unexpected rfkill state %d.\n", | |
109 | state); | |
110 | break; | |
93bb7f3a LF |
111 | } |
112 | ||
113 | out_unlock: | |
114 | mutex_unlock(&wl->mutex); | |
115 | ||
116 | return err; | |
117 | } | |
118 | ||
93a3b607 | 119 | char *b43legacy_rfkill_led_name(struct b43legacy_wldev *dev) |
93bb7f3a | 120 | { |
4ad36d78 | 121 | struct b43legacy_rfkill *rfk = &(dev->wl->rfkill); |
93bb7f3a | 122 | |
4ad36d78 | 123 | if (!rfk->registered) |
93bb7f3a | 124 | return NULL; |
4ad36d78 | 125 | return rfkill_get_led_name(rfk->rfkill); |
93bb7f3a LF |
126 | } |
127 | ||
128 | void b43legacy_rfkill_init(struct b43legacy_wldev *dev) | |
129 | { | |
130 | struct b43legacy_wl *wl = dev->wl; | |
131 | struct b43legacy_rfkill *rfk = &(wl->rfkill); | |
132 | int err; | |
133 | ||
4ad36d78 | 134 | rfk->registered = 0; |
6be50837 | 135 | |
4ad36d78 LF |
136 | rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN); |
137 | if (!rfk->rfkill) | |
138 | goto out_error; | |
93bb7f3a LF |
139 | snprintf(rfk->name, sizeof(rfk->name), |
140 | "b43legacy-%s", wiphy_name(wl->hw->wiphy)); | |
93bb7f3a | 141 | rfk->rfkill->name = rfk->name; |
f97d1f48 | 142 | rfk->rfkill->state = RFKILL_STATE_UNBLOCKED; |
93bb7f3a LF |
143 | rfk->rfkill->data = dev; |
144 | rfk->rfkill->toggle_radio = b43legacy_rfkill_soft_toggle; | |
93bb7f3a | 145 | |
6be50837 | 146 | rfk->poll_dev = input_allocate_polled_device(); |
222b01b7 SB |
147 | if (!rfk->poll_dev) { |
148 | rfkill_free(rfk->rfkill); | |
149 | goto err_freed_rfk; | |
150 | } | |
151 | ||
4ad36d78 LF |
152 | rfk->poll_dev->private = dev; |
153 | rfk->poll_dev->poll = b43legacy_rfkill_poll; | |
154 | rfk->poll_dev->poll_interval = 1000; /* msecs */ | |
155 | ||
156 | rfk->poll_dev->input->name = rfk->name; | |
157 | rfk->poll_dev->input->id.bustype = BUS_HOST; | |
158 | rfk->poll_dev->input->id.vendor = dev->dev->bus->boardinfo.vendor; | |
159 | rfk->poll_dev->input->evbit[0] = BIT(EV_KEY); | |
160 | set_bit(KEY_WLAN, rfk->poll_dev->input->keybit); | |
161 | ||
162 | err = rfkill_register(rfk->rfkill); | |
163 | if (err) | |
164 | goto err_free_polldev; | |
165 | ||
166 | #ifdef CONFIG_RFKILL_INPUT_MODULE | |
167 | /* B43legacy RF-kill isn't useful without the rfkill-input subsystem. | |
168 | * Try to load the module. */ | |
169 | err = request_module("rfkill-input"); | |
170 | if (err) | |
171 | b43legacywarn(wl, "Failed to load the rfkill-input module." | |
172 | "The built-in radio LED will not work.\n"); | |
173 | #endif /* CONFIG_RFKILL_INPUT */ | |
174 | ||
175 | err = input_register_polled_device(rfk->poll_dev); | |
176 | if (err) | |
177 | goto err_unreg_rfk; | |
178 | ||
179 | rfk->registered = 1; | |
180 | ||
181 | return; | |
182 | err_unreg_rfk: | |
183 | rfkill_unregister(rfk->rfkill); | |
184 | err_free_polldev: | |
185 | input_free_polled_device(rfk->poll_dev); | |
186 | rfk->poll_dev = NULL; | |
222b01b7 | 187 | err_freed_rfk: |
4ad36d78 LF |
188 | rfk->rfkill = NULL; |
189 | out_error: | |
190 | rfk->registered = 0; | |
191 | b43legacywarn(wl, "RF-kill button init failed\n"); | |
93bb7f3a LF |
192 | } |
193 | ||
4ad36d78 | 194 | void b43legacy_rfkill_exit(struct b43legacy_wldev *dev) |
93bb7f3a LF |
195 | { |
196 | struct b43legacy_rfkill *rfk = &(dev->wl->rfkill); | |
197 | ||
4ad36d78 LF |
198 | if (!rfk->registered) |
199 | return; | |
200 | rfk->registered = 0; | |
201 | ||
202 | input_unregister_polled_device(rfk->poll_dev); | |
203 | rfkill_unregister(rfk->rfkill); | |
6be50837 LF |
204 | input_free_polled_device(rfk->poll_dev); |
205 | rfk->poll_dev = NULL; | |
93bb7f3a LF |
206 | rfk->rfkill = NULL; |
207 | } | |
4ad36d78 | 208 |