static LIST_HEAD(rfkill_list); /* list of registered rf switches */
static DEFINE_MUTEX(rfkill_mutex);
-static unsigned int rfkill_default_state = RFKILL_STATE_ON;
+static unsigned int rfkill_default_state = RFKILL_STATE_UNBLOCKED;
module_param_named(default_state, rfkill_default_state, uint, 0444);
MODULE_PARM_DESC(default_state,
"Default initial state for all radio types, 0 = radio off");
if (!led->name)
return;
- if (state == RFKILL_STATE_OFF)
+ if (state != RFKILL_STATE_UNBLOCKED)
led_trigger_event(led, LED_OFF);
else
led_trigger_event(led, LED_FULL);
}
}
+/**
+ * rfkill_toggle_radio - wrapper for toggle_radio hook
+ *
+ * @rfkill: the rfkill struct to use
+ * @force: calls toggle_radio even if cache says it is not needed,
+ * and also makes sure notifications of the state will be
+ * sent even if it didn't change
+ * @state: the new state to call toggle_radio() with
+ *
+ * Calls rfkill->toggle_radio, enforcing the API for toggle_radio
+ * calls and handling all the red tape such as issuing notifications
+ * if the call is successful.
+ *
+ * Note that @force cannot override a (possibly cached) state of
+ * RFKILL_STATE_HARD_BLOCKED. Any device making use of
+ * RFKILL_STATE_HARD_BLOCKED implements either get_state() or
+ * rfkill_force_state(), so the cache either is bypassed or valid.
+ *
+ * Note that we do call toggle_radio for RFKILL_STATE_SOFT_BLOCKED
+ * even if the radio is in RFKILL_STATE_HARD_BLOCKED state, so as to
+ * give the driver a hint that it should double-BLOCK the transmitter.
+ *
+ * Caller must have aquired rfkill_mutex.
+ */
static int rfkill_toggle_radio(struct rfkill *rfkill,
enum rfkill_state state,
int force)
!rfkill->get_state(rfkill->data, &newstate))
rfkill->state = newstate;
+ switch (state) {
+ case RFKILL_STATE_HARD_BLOCKED:
+ /* typically happens when refreshing hardware state,
+ * such as on resume */
+ state = RFKILL_STATE_SOFT_BLOCKED;
+ break;
+ case RFKILL_STATE_UNBLOCKED:
+ /* force can't override this, only rfkill_force_state() can */
+ if (rfkill->state == RFKILL_STATE_HARD_BLOCKED)
+ return -EPERM;
+ break;
+ case RFKILL_STATE_SOFT_BLOCKED:
+ /* nothing to do, we want to give drivers the hint to double
+ * BLOCK even a transmitter that is already in state
+ * RFKILL_STATE_HARD_BLOCKED */
+ break;
+ }
+
if (force || state != rfkill->state) {
retval = rfkill->toggle_radio(rfkill->data, state);
- if (!retval)
+ /* never allow a HARD->SOFT downgrade! */
+ if (!retval && rfkill->state != RFKILL_STATE_HARD_BLOCKED)
rfkill->state = state;
}
}
EXPORT_SYMBOL(rfkill_switch_all);
+/**
+ * rfkill_epo - emergency power off all transmitters
+ *
+ * This kicks all rfkill devices to RFKILL_STATE_SOFT_BLOCKED, ignoring
+ * everything in its path but rfkill_mutex.
+ */
+void rfkill_epo(void)
+{
+ struct rfkill *rfkill;
+
+ mutex_lock(&rfkill_mutex);
+ list_for_each_entry(rfkill, &rfkill_list, node) {
+ rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
+ }
+ mutex_unlock(&rfkill_mutex);
+}
+EXPORT_SYMBOL_GPL(rfkill_epo);
+
/**
* rfkill_force_state - Force the internal rfkill radio state
* @rfkill: pointer to the rfkill class to modify.
{
enum rfkill_state oldstate;
- if (state != RFKILL_STATE_OFF &&
- state != RFKILL_STATE_ON)
+ if (state != RFKILL_STATE_SOFT_BLOCKED &&
+ state != RFKILL_STATE_UNBLOCKED &&
+ state != RFKILL_STATE_HARD_BLOCKED)
return -EINVAL;
mutex_lock(&rfkill->mutex);
return sprintf(buf, "%s\n", rfkill->name);
}
-static ssize_t rfkill_type_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static const char *rfkill_get_type_str(enum rfkill_type type)
{
- struct rfkill *rfkill = to_rfkill(dev);
- const char *type;
-
- switch (rfkill->type) {
+ switch (type) {
case RFKILL_TYPE_WLAN:
- type = "wlan";
- break;
+ return "wlan";
case RFKILL_TYPE_BLUETOOTH:
- type = "bluetooth";
- break;
+ return "bluetooth";
case RFKILL_TYPE_UWB:
- type = "ultrawideband";
- break;
+ return "ultrawideband";
case RFKILL_TYPE_WIMAX:
- type = "wimax";
- break;
+ return "wimax";
case RFKILL_TYPE_WWAN:
- type = "wwan";
- break;
+ return "wwan";
default:
BUG();
}
+}
- return sprintf(buf, "%s\n", type);
+static ssize_t rfkill_type_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rfkill *rfkill = to_rfkill(dev);
+
+ return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type));
}
static ssize_t rfkill_state_show(struct device *dev,
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ /* RFKILL_STATE_HARD_BLOCKED is illegal here... */
+ if (state != RFKILL_STATE_UNBLOCKED &&
+ state != RFKILL_STATE_SOFT_BLOCKED)
+ return -EINVAL;
+
if (mutex_lock_interruptible(&rfkill->mutex))
return -ERESTARTSYS;
- error = rfkill_toggle_radio(rfkill,
- state ? RFKILL_STATE_ON : RFKILL_STATE_OFF,
- 0);
+ error = rfkill_toggle_radio(rfkill, state, 0);
mutex_unlock(&rfkill->mutex);
return error ? error : count;
update_rfkill_state(rfkill);
mutex_lock(&rfkill->mutex);
- rfkill->toggle_radio(rfkill->data, RFKILL_STATE_OFF);
+ rfkill->toggle_radio(rfkill->data,
+ RFKILL_STATE_SOFT_BLOCKED);
mutex_unlock(&rfkill->mutex);
}
#define rfkill_resume NULL
#endif
+static int rfkill_blocking_uevent_notifier(struct notifier_block *nb,
+ unsigned long eventid,
+ void *data)
+{
+ struct rfkill *rfkill = (struct rfkill *)data;
+
+ switch (eventid) {
+ case RFKILL_STATE_CHANGED:
+ kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block rfkill_blocking_uevent_nb = {
+ .notifier_call = rfkill_blocking_uevent_notifier,
+ .priority = 0,
+};
+
+static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct rfkill *rfkill = to_rfkill(dev);
+ int error;
+
+ error = add_uevent_var(env, "RFKILL_NAME=%s", rfkill->name);
+ if (error)
+ return error;
+ error = add_uevent_var(env, "RFKILL_TYPE=%s",
+ rfkill_get_type_str(rfkill->type));
+ if (error)
+ return error;
+ error = add_uevent_var(env, "RFKILL_STATE=%d", rfkill->state);
+ return error;
+}
+
static struct class rfkill_class = {
.name = "rfkill",
.dev_release = rfkill_release,
.dev_attrs = rfkill_dev_attrs,
.suspend = rfkill_suspend,
.resume = rfkill_resume,
+ .dev_uevent = rfkill_dev_uevent,
};
static int rfkill_add_switch(struct rfkill *rfkill)
{
- int error;
-
mutex_lock(&rfkill_mutex);
- error = rfkill_toggle_radio(rfkill, rfkill_states[rfkill->type], 0);
- if (!error)
- list_add_tail(&rfkill->node, &rfkill_list);
+ rfkill_toggle_radio(rfkill, rfkill_states[rfkill->type], 0);
+
+ list_add_tail(&rfkill->node, &rfkill_list);
mutex_unlock(&rfkill_mutex);
- return error;
+ return 0;
}
static void rfkill_remove_switch(struct rfkill *rfkill)
{
mutex_lock(&rfkill_mutex);
list_del_init(&rfkill->node);
- rfkill_toggle_radio(rfkill, RFKILL_STATE_OFF, 1);
+ rfkill_toggle_radio(rfkill, RFKILL_STATE_SOFT_BLOCKED, 1);
mutex_unlock(&rfkill_mutex);
}
int error;
int i;
- if (rfkill_default_state != RFKILL_STATE_OFF &&
- rfkill_default_state != RFKILL_STATE_ON)
+ /* RFKILL_STATE_HARD_BLOCKED is illegal here... */
+ if (rfkill_default_state != RFKILL_STATE_SOFT_BLOCKED &&
+ rfkill_default_state != RFKILL_STATE_UNBLOCKED)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(rfkill_states); i++)
return error;
}
+ register_rfkill_notifier(&rfkill_blocking_uevent_nb);
+
return 0;
}
static void __exit rfkill_exit(void)
{
+ unregister_rfkill_notifier(&rfkill_blocking_uevent_nb);
class_unregister(&rfkill_class);
}
projects / linux-2.6-omap-h63xx.git / blobdiff