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8e9f7529 MB |
1 | /* |
2 | ||
3 | Broadcom B43 wireless driver | |
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 "b43.h" | |
ef1a628d | 27 | #include "phy_common.h" |
8e9f7529 | 28 | |
1a8d1227 LF |
29 | #include <linux/kmod.h> |
30 | ||
8e9f7529 | 31 | |
42bb4cd5 MB |
32 | /* Returns TRUE, if the radio is enabled in hardware. */ |
33 | static bool b43_is_hw_radio_enabled(struct b43_wldev *dev) | |
8e9f7529 | 34 | { |
42bb4cd5 MB |
35 | if (dev->phy.rev >= 3) { |
36 | if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI) | |
37 | & B43_MMIO_RADIO_HWENABLED_HI_MASK)) | |
38 | return 1; | |
39 | } else { | |
40 | if (b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO) | |
41 | & B43_MMIO_RADIO_HWENABLED_LO_MASK) | |
42 | return 1; | |
8e9f7529 | 43 | } |
42bb4cd5 | 44 | return 0; |
8e9f7529 MB |
45 | } |
46 | ||
42bb4cd5 MB |
47 | /* The poll callback for the hardware button. */ |
48 | static void b43_rfkill_poll(struct input_polled_dev *poll_dev) | |
8e9f7529 | 49 | { |
42bb4cd5 | 50 | struct b43_wldev *dev = poll_dev->private; |
8e9f7529 | 51 | struct b43_wl *wl = dev->wl; |
42bb4cd5 | 52 | bool enabled; |
35c7e660 | 53 | bool report_change = 0; |
8e9f7529 | 54 | |
42bb4cd5 | 55 | mutex_lock(&wl->mutex); |
1a8d1227 LF |
56 | if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) { |
57 | mutex_unlock(&wl->mutex); | |
58 | return; | |
59 | } | |
42bb4cd5 MB |
60 | enabled = b43_is_hw_radio_enabled(dev); |
61 | if (unlikely(enabled != dev->radio_hw_enable)) { | |
62 | dev->radio_hw_enable = enabled; | |
35c7e660 | 63 | report_change = 1; |
42bb4cd5 MB |
64 | b43info(wl, "Radio hardware status changed to %s\n", |
65 | enabled ? "ENABLED" : "DISABLED"); | |
35c7e660 MB |
66 | } |
67 | mutex_unlock(&wl->mutex); | |
68 | ||
1a8d1227 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 | } | |
8e9f7529 MB |
75 | } |
76 | ||
80fda03f | 77 | /* Called when the RFKILL toggled in software. */ |
8e9f7529 MB |
78 | static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state) |
79 | { | |
80 | struct b43_wldev *dev = data; | |
81 | struct b43_wl *wl = dev->wl; | |
1a8d1227 | 82 | int err = -EBUSY; |
8e9f7529 | 83 | |
35c7e660 MB |
84 | if (!wl->rfkill.registered) |
85 | return 0; | |
8e9f7529 | 86 | |
35c7e660 | 87 | mutex_lock(&wl->mutex); |
1a8d1227 LF |
88 | if (b43_status(dev) < B43_STAT_INITIALIZED) |
89 | goto out_unlock; | |
90 | err = 0; | |
8e9f7529 | 91 | switch (state) { |
ff28bd94 | 92 | case RFKILL_STATE_UNBLOCKED: |
8e9f7529 MB |
93 | if (!dev->radio_hw_enable) { |
94 | /* No luck. We can't toggle the hardware RF-kill | |
95 | * button from software. */ | |
96 | err = -EBUSY; | |
97 | goto out_unlock; | |
98 | } | |
99 | if (!dev->phy.radio_on) | |
ef1a628d | 100 | b43_software_rfkill(dev, state); |
8e9f7529 | 101 | break; |
ff28bd94 | 102 | case RFKILL_STATE_SOFT_BLOCKED: |
8e9f7529 | 103 | if (dev->phy.radio_on) |
ef1a628d | 104 | b43_software_rfkill(dev, state); |
8e9f7529 | 105 | break; |
ff28bd94 JL |
106 | default: |
107 | b43warn(wl, "Received unexpected rfkill state %d.\n", state); | |
108 | break; | |
8e9f7529 | 109 | } |
8e9f7529 MB |
110 | out_unlock: |
111 | mutex_unlock(&wl->mutex); | |
112 | ||
113 | return err; | |
114 | } | |
115 | ||
99da185a | 116 | char *b43_rfkill_led_name(struct b43_wldev *dev) |
8e9f7529 | 117 | { |
35c7e660 | 118 | struct b43_rfkill *rfk = &(dev->wl->rfkill); |
8e9f7529 | 119 | |
35c7e660 | 120 | if (!rfk->registered) |
8e9f7529 | 121 | return NULL; |
35c7e660 | 122 | return rfkill_get_led_name(rfk->rfkill); |
8e9f7529 MB |
123 | } |
124 | ||
125 | void b43_rfkill_init(struct b43_wldev *dev) | |
126 | { | |
127 | struct b43_wl *wl = dev->wl; | |
128 | struct b43_rfkill *rfk = &(wl->rfkill); | |
129 | int err; | |
130 | ||
35c7e660 | 131 | rfk->registered = 0; |
42bb4cd5 | 132 | |
35c7e660 MB |
133 | rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN); |
134 | if (!rfk->rfkill) | |
135 | goto out_error; | |
8e9f7529 MB |
136 | snprintf(rfk->name, sizeof(rfk->name), |
137 | "b43-%s", wiphy_name(wl->hw->wiphy)); | |
8e9f7529 | 138 | rfk->rfkill->name = rfk->name; |
f97d1f48 | 139 | rfk->rfkill->state = RFKILL_STATE_UNBLOCKED; |
8e9f7529 MB |
140 | rfk->rfkill->data = dev; |
141 | rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle; | |
142 | rfk->rfkill->user_claim_unsupported = 1; | |
143 | ||
42bb4cd5 | 144 | rfk->poll_dev = input_allocate_polled_device(); |
a38db5b6 SB |
145 | if (!rfk->poll_dev) { |
146 | rfkill_free(rfk->rfkill); | |
147 | goto err_freed_rfk; | |
148 | } | |
149 | ||
35c7e660 MB |
150 | rfk->poll_dev->private = dev; |
151 | rfk->poll_dev->poll = b43_rfkill_poll; | |
152 | rfk->poll_dev->poll_interval = 1000; /* msecs */ | |
153 | ||
1a8d1227 LF |
154 | rfk->poll_dev->input->name = rfk->name; |
155 | rfk->poll_dev->input->id.bustype = BUS_HOST; | |
156 | rfk->poll_dev->input->id.vendor = dev->dev->bus->boardinfo.vendor; | |
157 | rfk->poll_dev->input->evbit[0] = BIT(EV_KEY); | |
158 | set_bit(KEY_WLAN, rfk->poll_dev->input->keybit); | |
159 | ||
35c7e660 MB |
160 | err = rfkill_register(rfk->rfkill); |
161 | if (err) | |
162 | goto err_free_polldev; | |
1a8d1227 LF |
163 | |
164 | #ifdef CONFIG_RFKILL_INPUT_MODULE | |
165 | /* B43 RF-kill isn't useful without the rfkill-input subsystem. | |
166 | * Try to load the module. */ | |
167 | err = request_module("rfkill-input"); | |
168 | if (err) | |
169 | b43warn(wl, "Failed to load the rfkill-input module. " | |
170 | "The built-in radio LED will not work.\n"); | |
171 | #endif /* CONFIG_RFKILL_INPUT */ | |
172 | ||
fdd10974 LF |
173 | #if !defined(CONFIG_RFKILL_INPUT) && !defined(CONFIG_RFKILL_INPUT_MODULE) |
174 | b43warn(wl, "The rfkill-input subsystem is not available. " | |
175 | "The built-in radio LED will not work.\n"); | |
176 | #endif | |
177 | ||
35c7e660 MB |
178 | err = input_register_polled_device(rfk->poll_dev); |
179 | if (err) | |
180 | goto err_unreg_rfk; | |
181 | ||
182 | rfk->registered = 1; | |
183 | ||
184 | return; | |
185 | err_unreg_rfk: | |
186 | rfkill_unregister(rfk->rfkill); | |
187 | err_free_polldev: | |
188 | input_free_polled_device(rfk->poll_dev); | |
189 | rfk->poll_dev = NULL; | |
a38db5b6 | 190 | err_freed_rfk: |
35c7e660 MB |
191 | rfk->rfkill = NULL; |
192 | out_error: | |
193 | rfk->registered = 0; | |
194 | b43warn(wl, "RF-kill button init failed\n"); | |
8e9f7529 MB |
195 | } |
196 | ||
35c7e660 | 197 | void b43_rfkill_exit(struct b43_wldev *dev) |
8e9f7529 MB |
198 | { |
199 | struct b43_rfkill *rfk = &(dev->wl->rfkill); | |
200 | ||
35c7e660 MB |
201 | if (!rfk->registered) |
202 | return; | |
203 | rfk->registered = 0; | |
204 | ||
205 | input_unregister_polled_device(rfk->poll_dev); | |
206 | rfkill_unregister(rfk->rfkill); | |
42bb4cd5 MB |
207 | input_free_polled_device(rfk->poll_dev); |
208 | rfk->poll_dev = NULL; | |
8e9f7529 MB |
209 | rfk->rfkill = NULL; |
210 | } |