3 Broadcom B43 wireless driver
6 Copyright (c) 2007 Michael Buesch <mb@bu3sch.de>
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.
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.
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.
27 #include "phy_common.h"
29 #include <linux/kmod.h>
32 /* Returns TRUE, if the radio is enabled in hardware. */
33 static bool b43_is_hw_radio_enabled(struct b43_wldev *dev)
35 if (dev->phy.rev >= 3) {
36 if (!(b43_read32(dev, B43_MMIO_RADIO_HWENABLED_HI)
37 & B43_MMIO_RADIO_HWENABLED_HI_MASK))
40 if (b43_read16(dev, B43_MMIO_RADIO_HWENABLED_LO)
41 & B43_MMIO_RADIO_HWENABLED_LO_MASK)
47 /* Update the rfkill state */
48 static void b43_rfkill_update_state(struct b43_wldev *dev)
50 struct b43_rfkill *rfk = &(dev->wl->rfkill);
52 if (!dev->radio_hw_enable) {
53 rfk->rfkill->state = RFKILL_STATE_HARD_BLOCKED;
57 if (!dev->phy.radio_on)
58 rfk->rfkill->state = RFKILL_STATE_SOFT_BLOCKED;
60 rfk->rfkill->state = RFKILL_STATE_UNBLOCKED;
64 /* The poll callback for the hardware button. */
65 static void b43_rfkill_poll(struct input_polled_dev *poll_dev)
67 struct b43_wldev *dev = poll_dev->private;
68 struct b43_wl *wl = dev->wl;
70 bool report_change = 0;
72 mutex_lock(&wl->mutex);
73 if (unlikely(b43_status(dev) < B43_STAT_INITIALIZED)) {
74 mutex_unlock(&wl->mutex);
77 enabled = b43_is_hw_radio_enabled(dev);
78 if (unlikely(enabled != dev->radio_hw_enable)) {
79 dev->radio_hw_enable = enabled;
81 b43_rfkill_update_state(dev);
82 b43info(wl, "Radio hardware status changed to %s\n",
83 enabled ? "ENABLED" : "DISABLED");
85 mutex_unlock(&wl->mutex);
87 /* send the radio switch event to the system - note both a key press
88 * and a release are required */
89 if (unlikely(report_change)) {
90 input_report_key(poll_dev->input, KEY_WLAN, 1);
91 input_report_key(poll_dev->input, KEY_WLAN, 0);
95 /* Called when the RFKILL toggled in software. */
96 static int b43_rfkill_soft_toggle(void *data, enum rfkill_state state)
98 struct b43_wldev *dev = data;
99 struct b43_wl *wl = dev->wl;
102 if (!wl->rfkill.registered)
105 mutex_lock(&wl->mutex);
106 if (b43_status(dev) < B43_STAT_INITIALIZED)
110 case RFKILL_STATE_UNBLOCKED:
111 if (!dev->radio_hw_enable) {
112 /* No luck. We can't toggle the hardware RF-kill
113 * button from software. */
117 if (!dev->phy.radio_on)
118 b43_software_rfkill(dev, state);
120 case RFKILL_STATE_SOFT_BLOCKED:
121 if (dev->phy.radio_on)
122 b43_software_rfkill(dev, state);
125 b43warn(wl, "Received unexpected rfkill state %d.\n", state);
129 mutex_unlock(&wl->mutex);
134 char * b43_rfkill_led_name(struct b43_wldev *dev)
136 struct b43_rfkill *rfk = &(dev->wl->rfkill);
138 if (!rfk->registered)
140 return rfkill_get_led_name(rfk->rfkill);
143 void b43_rfkill_init(struct b43_wldev *dev)
145 struct b43_wl *wl = dev->wl;
146 struct b43_rfkill *rfk = &(wl->rfkill);
151 rfk->rfkill = rfkill_allocate(dev->dev->dev, RFKILL_TYPE_WLAN);
154 snprintf(rfk->name, sizeof(rfk->name),
155 "b43-%s", wiphy_name(wl->hw->wiphy));
156 rfk->rfkill->name = rfk->name;
157 rfk->rfkill->state = RFKILL_STATE_UNBLOCKED;
158 rfk->rfkill->data = dev;
159 rfk->rfkill->toggle_radio = b43_rfkill_soft_toggle;
160 rfk->rfkill->user_claim_unsupported = 1;
162 rfk->poll_dev = input_allocate_polled_device();
163 if (!rfk->poll_dev) {
164 rfkill_free(rfk->rfkill);
168 rfk->poll_dev->private = dev;
169 rfk->poll_dev->poll = b43_rfkill_poll;
170 rfk->poll_dev->poll_interval = 1000; /* msecs */
172 rfk->poll_dev->input->name = rfk->name;
173 rfk->poll_dev->input->id.bustype = BUS_HOST;
174 rfk->poll_dev->input->id.vendor = dev->dev->bus->boardinfo.vendor;
175 rfk->poll_dev->input->evbit[0] = BIT(EV_KEY);
176 set_bit(KEY_WLAN, rfk->poll_dev->input->keybit);
178 err = rfkill_register(rfk->rfkill);
180 goto err_free_polldev;
182 #ifdef CONFIG_RFKILL_INPUT_MODULE
183 /* B43 RF-kill isn't useful without the rfkill-input subsystem.
184 * Try to load the module. */
185 err = request_module("rfkill-input");
187 b43warn(wl, "Failed to load the rfkill-input module. "
188 "The built-in radio LED will not work.\n");
189 #endif /* CONFIG_RFKILL_INPUT */
191 err = input_register_polled_device(rfk->poll_dev);
199 rfkill_unregister(rfk->rfkill);
201 input_free_polled_device(rfk->poll_dev);
202 rfk->poll_dev = NULL;
207 b43warn(wl, "RF-kill button init failed\n");
210 void b43_rfkill_exit(struct b43_wldev *dev)
212 struct b43_rfkill *rfk = &(dev->wl->rfkill);
214 if (!rfk->registered)
218 input_unregister_polled_device(rfk->poll_dev);
219 rfkill_unregister(rfk->rfkill);
220 input_free_polled_device(rfk->poll_dev);
221 rfk->poll_dev = NULL;