#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/rfkill.h>
+#include <linux/sched.h>
#include <linux/spinlock.h>
+#include <linux/miscdevice.h>
+#include <linux/wait.h>
+#include <linux/poll.h>
+#include <linux/fs.h>
#include "rfkill.h"
unsigned long state;
+ u32 idx;
+
bool registered;
- bool suspended;
+ bool persistent;
const struct rfkill_ops *ops;
void *data;
};
#define to_rfkill(d) container_of(d, struct rfkill, dev)
+struct rfkill_int_event {
+ struct list_head list;
+ struct rfkill_event ev;
+};
+
+struct rfkill_data {
+ struct list_head list;
+ struct list_head events;
+ struct mutex mtx;
+ wait_queue_head_t read_wait;
+ bool input_handler;
+};
MODULE_AUTHOR("Ivo van Doorn <IvDoorn@gmail.com>");
*/
static LIST_HEAD(rfkill_list); /* list of registered rf switches */
static DEFINE_MUTEX(rfkill_global_mutex);
+static LIST_HEAD(rfkill_fds); /* list of open fds of /dev/rfkill */
static unsigned int rfkill_default_state = 1;
module_param_named(default_state, rfkill_default_state, uint, 0444);
"Default initial state for all radio types, 0 = radio off");
static struct {
- bool cur, def;
+ bool cur, sav;
} rfkill_global_states[NUM_RFKILL_TYPES];
-static unsigned long rfkill_states_default_locked;
-
static bool rfkill_epo_lock_active;
}
#endif /* CONFIG_RFKILL_LEDS */
-static void rfkill_uevent(struct rfkill *rfkill)
+static void rfkill_fill_event(struct rfkill_event *ev, struct rfkill *rfkill,
+ enum rfkill_operation op)
{
- if (!rfkill->registered || rfkill->suspended)
+ unsigned long flags;
+
+ ev->idx = rfkill->idx;
+ ev->type = rfkill->type;
+ ev->op = op;
+
+ spin_lock_irqsave(&rfkill->lock, flags);
+ ev->hard = !!(rfkill->state & RFKILL_BLOCK_HW);
+ ev->soft = !!(rfkill->state & (RFKILL_BLOCK_SW |
+ RFKILL_BLOCK_SW_PREV));
+ spin_unlock_irqrestore(&rfkill->lock, flags);
+}
+
+static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op)
+{
+ struct rfkill_data *data;
+ struct rfkill_int_event *ev;
+
+ list_for_each_entry(data, &rfkill_fds, list) {
+ ev = kzalloc(sizeof(*ev), GFP_KERNEL);
+ if (!ev)
+ continue;
+ rfkill_fill_event(&ev->ev, rfkill, op);
+ mutex_lock(&data->mtx);
+ list_add_tail(&ev->list, &data->events);
+ mutex_unlock(&data->mtx);
+ wake_up_interruptible(&data->read_wait);
+ }
+}
+
+static void rfkill_event(struct rfkill *rfkill)
+{
+ if (!rfkill->registered)
return;
kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE);
+
+ /* also send event to /dev/rfkill */
+ rfkill_send_events(rfkill, RFKILL_OP_CHANGE);
}
static bool __rfkill_set_hw_state(struct rfkill *rfkill,
unsigned long flags;
int err;
+ if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP))
+ return;
+
/*
* Some platforms (...!) generate input events which affect the
* _hard_ kill state -- whenever something tries to change the
rfkill->state |= RFKILL_BLOCK_SW_SETCALL;
spin_unlock_irqrestore(&rfkill->lock, flags);
- if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP))
- return;
-
err = rfkill->ops->set_block(rfkill->data, blocked);
spin_lock_irqsave(&rfkill->lock, flags);
spin_unlock_irqrestore(&rfkill->lock, flags);
rfkill_led_trigger_event(rfkill);
- rfkill_uevent(rfkill);
+ rfkill_event(rfkill);
}
+#ifdef CONFIG_RFKILL_INPUT
+static atomic_t rfkill_input_disabled = ATOMIC_INIT(0);
+
/**
* __rfkill_switch_all - Toggle state of all switches of given type
* @type: type of interfaces to be affected
*/
void rfkill_switch_all(enum rfkill_type type, bool blocked)
{
+ if (atomic_read(&rfkill_input_disabled))
+ return;
+
mutex_lock(&rfkill_global_mutex);
if (!rfkill_epo_lock_active)
struct rfkill *rfkill;
int i;
+ if (atomic_read(&rfkill_input_disabled))
+ return;
+
mutex_lock(&rfkill_global_mutex);
rfkill_epo_lock_active = true;
rfkill_set_block(rfkill, true);
for (i = 0; i < NUM_RFKILL_TYPES; i++) {
- rfkill_global_states[i].def = rfkill_global_states[i].cur;
+ rfkill_global_states[i].sav = rfkill_global_states[i].cur;
rfkill_global_states[i].cur = true;
}
+
mutex_unlock(&rfkill_global_mutex);
}
{
int i;
+ if (atomic_read(&rfkill_input_disabled))
+ return;
+
mutex_lock(&rfkill_global_mutex);
rfkill_epo_lock_active = false;
for (i = 0; i < NUM_RFKILL_TYPES; i++)
- __rfkill_switch_all(i, rfkill_global_states[i].def);
+ __rfkill_switch_all(i, rfkill_global_states[i].sav);
mutex_unlock(&rfkill_global_mutex);
}
*/
void rfkill_remove_epo_lock(void)
{
+ if (atomic_read(&rfkill_input_disabled))
+ return;
+
mutex_lock(&rfkill_global_mutex);
rfkill_epo_lock_active = false;
mutex_unlock(&rfkill_global_mutex);
{
return rfkill_global_states[type].cur;
}
-
-void rfkill_set_global_sw_state(const enum rfkill_type type, bool blocked)
-{
- mutex_lock(&rfkill_global_mutex);
-
- /* don't allow unblock when epo */
- if (rfkill_epo_lock_active && !blocked)
- goto out;
-
- /* too late */
- if (rfkill_states_default_locked & BIT(type))
- goto out;
-
- rfkill_states_default_locked |= BIT(type);
-
- rfkill_global_states[type].cur = blocked;
- rfkill_global_states[type].def = blocked;
- out:
- mutex_unlock(&rfkill_global_mutex);
-}
-EXPORT_SYMBOL(rfkill_set_global_sw_state);
+#endif
bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
}
EXPORT_SYMBOL(rfkill_set_sw_state);
+void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
+{
+ unsigned long flags;
+
+ BUG_ON(!rfkill);
+ BUG_ON(rfkill->registered);
+
+ spin_lock_irqsave(&rfkill->lock, flags);
+ __rfkill_set_sw_state(rfkill, blocked);
+ rfkill->persistent = true;
+ spin_unlock_irqrestore(&rfkill->lock, flags);
+}
+EXPORT_SYMBOL(rfkill_init_sw_state);
+
void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
{
unsigned long flags;
swprev = !!(rfkill->state & RFKILL_BLOCK_SW);
hwprev = !!(rfkill->state & RFKILL_BLOCK_HW);
__rfkill_set_sw_state(rfkill, sw);
+ if (hw)
+ rfkill->state |= RFKILL_BLOCK_HW;
+ else
+ rfkill->state &= ~RFKILL_BLOCK_HW;
spin_unlock_irqrestore(&rfkill->lock, flags);
- if (!rfkill->registered)
- return;
+ if (!rfkill->registered) {
+ rfkill->persistent = true;
+ } else {
+ if (swprev != sw || hwprev != hw)
+ schedule_work(&rfkill->uevent_work);
- if (swprev != sw || hwprev != hw)
- schedule_work(&rfkill->uevent_work);
-
- rfkill_led_trigger_event(rfkill);
+ rfkill_led_trigger_event(rfkill);
+ }
}
EXPORT_SYMBOL(rfkill_set_states);
static const char *rfkill_get_type_str(enum rfkill_type type)
{
+ BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_FM + 1);
+
switch (type) {
case RFKILL_TYPE_WLAN:
return "wlan";
return "wimax";
case RFKILL_TYPE_WWAN:
return "wwan";
+ case RFKILL_TYPE_GPS:
+ return "gps";
+ case RFKILL_TYPE_FM:
+ return "fm";
default:
BUG();
}
-
- BUILD_BUG_ON(NUM_RFKILL_TYPES != RFKILL_TYPE_WWAN + 1);
}
static ssize_t rfkill_type_show(struct device *dev,
return sprintf(buf, "%s\n", rfkill_get_type_str(rfkill->type));
}
+static ssize_t rfkill_idx_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rfkill *rfkill = to_rfkill(dev);
+
+ return sprintf(buf, "%d\n", rfkill->idx);
+}
+
+static ssize_t rfkill_persistent_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rfkill *rfkill = to_rfkill(dev);
+
+ return sprintf(buf, "%d\n", rfkill->persistent);
+}
+
static u8 user_state_from_blocked(unsigned long state)
{
if (state & RFKILL_BLOCK_HW)
struct device_attribute *attr,
const char *buf, size_t count)
{
- /*
- * The intention was that userspace can only take control over
- * a given device when/if rfkill-input doesn't control it due
- * to user_claim. Since user_claim is currently unsupported,
- * we never support changing the state from userspace -- this
- * can be implemented again later.
- */
+ struct rfkill *rfkill = to_rfkill(dev);
+ unsigned long state;
+ int err;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ err = strict_strtoul(buf, 0, &state);
+ if (err)
+ return err;
+
+ if (state != RFKILL_USER_STATE_SOFT_BLOCKED &&
+ state != RFKILL_USER_STATE_UNBLOCKED)
+ return -EINVAL;
+
+ mutex_lock(&rfkill_global_mutex);
+ rfkill_set_block(rfkill, state == RFKILL_USER_STATE_SOFT_BLOCKED);
+ mutex_unlock(&rfkill_global_mutex);
- return -EPERM;
+ return err ?: count;
}
static ssize_t rfkill_claim_show(struct device *dev,
static struct device_attribute rfkill_dev_attrs[] = {
__ATTR(name, S_IRUGO, rfkill_name_show, NULL),
__ATTR(type, S_IRUGO, rfkill_type_show, NULL),
+ __ATTR(index, S_IRUGO, rfkill_idx_show, NULL),
+ __ATTR(persistent, S_IRUGO, rfkill_persistent_show, NULL),
__ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store),
__ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store),
__ATTR_NULL
rfkill_pause_polling(rfkill);
- rfkill->suspended = true;
-
return 0;
}
struct rfkill *rfkill = to_rfkill(dev);
bool cur;
- mutex_lock(&rfkill_global_mutex);
- cur = rfkill_global_states[rfkill->type].cur;
- rfkill_set_block(rfkill, cur);
- mutex_unlock(&rfkill_global_mutex);
-
- rfkill->suspended = false;
-
- schedule_work(&rfkill->uevent_work);
+ if (!rfkill->persistent) {
+ cur = !!(rfkill->state & RFKILL_BLOCK_SW);
+ rfkill_set_block(rfkill, cur);
+ }
rfkill_resume_polling(rfkill);
.resume = rfkill_resume,
};
+bool rfkill_blocked(struct rfkill *rfkill)
+{
+ unsigned long flags;
+ u32 state;
+
+ spin_lock_irqsave(&rfkill->lock, flags);
+ state = rfkill->state;
+ spin_unlock_irqrestore(&rfkill->lock, flags);
+
+ return !!(state & RFKILL_BLOCK_ANY);
+}
+EXPORT_SYMBOL(rfkill_blocked);
+
struct rfkill * __must_check rfkill_alloc(const char *name,
struct device *parent,
if (WARN_ON(!name))
return NULL;
- if (WARN_ON(type >= NUM_RFKILL_TYPES))
+ if (WARN_ON(type == RFKILL_TYPE_ALL || type >= NUM_RFKILL_TYPES))
return NULL;
rfkill = kzalloc(sizeof(*rfkill), GFP_KERNEL);
rfkill = container_of(work, struct rfkill, uevent_work);
- rfkill_uevent(rfkill);
+ mutex_lock(&rfkill_global_mutex);
+ rfkill_event(rfkill);
+ mutex_unlock(&rfkill_global_mutex);
}
static void rfkill_sync_work(struct work_struct *work)
goto unlock;
}
+ rfkill->idx = rfkill_no;
dev_set_name(dev, "rfkill%lu", rfkill_no);
rfkill_no++;
- if (!(rfkill_states_default_locked & BIT(rfkill->type))) {
- /* first of its kind */
- BUILD_BUG_ON(NUM_RFKILL_TYPES >
- sizeof(rfkill_states_default_locked) * 8);
- rfkill_states_default_locked |= BIT(rfkill->type);
- rfkill_global_states[rfkill->type].cur =
- rfkill_global_states[rfkill->type].def;
- }
-
list_add_tail(&rfkill->node, &rfkill_list);
error = device_add(dev);
rfkill->registered = true;
- if (rfkill->ops->poll) {
- INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll);
+ INIT_DELAYED_WORK(&rfkill->poll_work, rfkill_poll);
+ INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work);
+ INIT_WORK(&rfkill->sync_work, rfkill_sync_work);
+
+ if (rfkill->ops->poll)
schedule_delayed_work(&rfkill->poll_work,
round_jiffies_relative(POLL_INTERVAL));
- }
- INIT_WORK(&rfkill->uevent_work, rfkill_uevent_work);
+ if (!rfkill->persistent || rfkill_epo_lock_active) {
+ schedule_work(&rfkill->sync_work);
+ } else {
+#ifdef CONFIG_RFKILL_INPUT
+ bool soft_blocked = !!(rfkill->state & RFKILL_BLOCK_SW);
- INIT_WORK(&rfkill->sync_work, rfkill_sync_work);
- schedule_work(&rfkill->sync_work);
+ if (!atomic_read(&rfkill_input_disabled))
+ __rfkill_switch_all(rfkill->type, soft_blocked);
+#endif
+ }
+
+ rfkill_send_events(rfkill, RFKILL_OP_ADD);
mutex_unlock(&rfkill_global_mutex);
return 0;
device_del(&rfkill->dev);
mutex_lock(&rfkill_global_mutex);
+ rfkill_send_events(rfkill, RFKILL_OP_DEL);
list_del_init(&rfkill->node);
mutex_unlock(&rfkill_global_mutex);
}
EXPORT_SYMBOL(rfkill_destroy);
+static int rfkill_fop_open(struct inode *inode, struct file *file)
+{
+ struct rfkill_data *data;
+ struct rfkill *rfkill;
+ struct rfkill_int_event *ev, *tmp;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&data->events);
+ mutex_init(&data->mtx);
+ init_waitqueue_head(&data->read_wait);
+
+ mutex_lock(&rfkill_global_mutex);
+ mutex_lock(&data->mtx);
+ /*
+ * start getting events from elsewhere but hold mtx to get
+ * startup events added first
+ */
+ list_add(&data->list, &rfkill_fds);
+
+ list_for_each_entry(rfkill, &rfkill_list, node) {
+ ev = kzalloc(sizeof(*ev), GFP_KERNEL);
+ if (!ev)
+ goto free;
+ rfkill_fill_event(&ev->ev, rfkill, RFKILL_OP_ADD);
+ list_add_tail(&ev->list, &data->events);
+ }
+ mutex_unlock(&data->mtx);
+ mutex_unlock(&rfkill_global_mutex);
+
+ file->private_data = data;
+
+ return nonseekable_open(inode, file);
+
+ free:
+ mutex_unlock(&data->mtx);
+ mutex_unlock(&rfkill_global_mutex);
+ mutex_destroy(&data->mtx);
+ list_for_each_entry_safe(ev, tmp, &data->events, list)
+ kfree(ev);
+ kfree(data);
+ return -ENOMEM;
+}
+
+static unsigned int rfkill_fop_poll(struct file *file, poll_table *wait)
+{
+ struct rfkill_data *data = file->private_data;
+ unsigned int res = POLLOUT | POLLWRNORM;
+
+ poll_wait(file, &data->read_wait, wait);
+
+ mutex_lock(&data->mtx);
+ if (!list_empty(&data->events))
+ res = POLLIN | POLLRDNORM;
+ mutex_unlock(&data->mtx);
+
+ return res;
+}
+
+static bool rfkill_readable(struct rfkill_data *data)
+{
+ bool r;
+
+ mutex_lock(&data->mtx);
+ r = !list_empty(&data->events);
+ mutex_unlock(&data->mtx);
+
+ return r;
+}
+
+static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct rfkill_data *data = file->private_data;
+ struct rfkill_int_event *ev;
+ unsigned long sz;
+ int ret;
+
+ mutex_lock(&data->mtx);
+
+ while (list_empty(&data->events)) {
+ if (file->f_flags & O_NONBLOCK) {
+ ret = -EAGAIN;
+ goto out;
+ }
+ mutex_unlock(&data->mtx);
+ ret = wait_event_interruptible(data->read_wait,
+ rfkill_readable(data));
+ mutex_lock(&data->mtx);
+
+ if (ret)
+ goto out;
+ }
+
+ ev = list_first_entry(&data->events, struct rfkill_int_event,
+ list);
+
+ sz = min_t(unsigned long, sizeof(ev->ev), count);
+ ret = sz;
+ if (copy_to_user(buf, &ev->ev, sz))
+ ret = -EFAULT;
+
+ list_del(&ev->list);
+ kfree(ev);
+ out:
+ mutex_unlock(&data->mtx);
+ return ret;
+}
+
+static ssize_t rfkill_fop_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct rfkill *rfkill;
+ struct rfkill_event ev;
+
+ /* we don't need the 'hard' variable but accept it */
+ if (count < RFKILL_EVENT_SIZE_V1 - 1)
+ return -EINVAL;
+
+ /*
+ * Copy as much data as we can accept into our 'ev' buffer,
+ * but tell userspace how much we've copied so it can determine
+ * our API version even in a write() call, if it cares.
+ */
+ count = min(count, sizeof(ev));
+ if (copy_from_user(&ev, buf, count))
+ return -EFAULT;
+
+ if (ev.op != RFKILL_OP_CHANGE && ev.op != RFKILL_OP_CHANGE_ALL)
+ return -EINVAL;
+
+ if (ev.type >= NUM_RFKILL_TYPES)
+ return -EINVAL;
+
+ mutex_lock(&rfkill_global_mutex);
+
+ if (ev.op == RFKILL_OP_CHANGE_ALL) {
+ if (ev.type == RFKILL_TYPE_ALL) {
+ enum rfkill_type i;
+ for (i = 0; i < NUM_RFKILL_TYPES; i++)
+ rfkill_global_states[i].cur = ev.soft;
+ } else {
+ rfkill_global_states[ev.type].cur = ev.soft;
+ }
+ }
+
+ list_for_each_entry(rfkill, &rfkill_list, node) {
+ if (rfkill->idx != ev.idx && ev.op != RFKILL_OP_CHANGE_ALL)
+ continue;
+
+ if (rfkill->type != ev.type && ev.type != RFKILL_TYPE_ALL)
+ continue;
+
+ rfkill_set_block(rfkill, ev.soft);
+ }
+ mutex_unlock(&rfkill_global_mutex);
+
+ return count;
+}
+
+static int rfkill_fop_release(struct inode *inode, struct file *file)
+{
+ struct rfkill_data *data = file->private_data;
+ struct rfkill_int_event *ev, *tmp;
+
+ mutex_lock(&rfkill_global_mutex);
+ list_del(&data->list);
+ mutex_unlock(&rfkill_global_mutex);
+
+ mutex_destroy(&data->mtx);
+ list_for_each_entry_safe(ev, tmp, &data->events, list)
+ kfree(ev);
+
+#ifdef CONFIG_RFKILL_INPUT
+ if (data->input_handler)
+ if (atomic_dec_return(&rfkill_input_disabled) == 0)
+ printk(KERN_DEBUG "rfkill: input handler enabled\n");
+#endif
+
+ kfree(data);
+
+ return 0;
+}
+
+#ifdef CONFIG_RFKILL_INPUT
+static long rfkill_fop_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct rfkill_data *data = file->private_data;
+
+ if (_IOC_TYPE(cmd) != RFKILL_IOC_MAGIC)
+ return -ENOSYS;
+
+ if (_IOC_NR(cmd) != RFKILL_IOC_NOINPUT)
+ return -ENOSYS;
+
+ mutex_lock(&data->mtx);
+
+ if (!data->input_handler) {
+ if (atomic_inc_return(&rfkill_input_disabled) == 1)
+ printk(KERN_DEBUG "rfkill: input handler disabled\n");
+ data->input_handler = true;
+ }
+
+ mutex_unlock(&data->mtx);
+
+ return 0;
+}
+#endif
+
+static const struct file_operations rfkill_fops = {
+ .owner = THIS_MODULE,
+ .open = rfkill_fop_open,
+ .read = rfkill_fop_read,
+ .write = rfkill_fop_write,
+ .poll = rfkill_fop_poll,
+ .release = rfkill_fop_release,
+#ifdef CONFIG_RFKILL_INPUT
+ .unlocked_ioctl = rfkill_fop_ioctl,
+ .compat_ioctl = rfkill_fop_ioctl,
+#endif
+};
+
+static struct miscdevice rfkill_miscdev = {
+ .name = "rfkill",
+ .fops = &rfkill_fops,
+ .minor = MISC_DYNAMIC_MINOR,
+};
static int __init rfkill_init(void)
{
int i;
for (i = 0; i < NUM_RFKILL_TYPES; i++)
- rfkill_global_states[i].def = !rfkill_default_state;
+ rfkill_global_states[i].cur = !rfkill_default_state;
error = class_register(&rfkill_class);
if (error)
goto out;
+ error = misc_register(&rfkill_miscdev);
+ if (error) {
+ class_unregister(&rfkill_class);
+ goto out;
+ }
+
#ifdef CONFIG_RFKILL_INPUT
error = rfkill_handler_init();
- if (error)
+ if (error) {
+ misc_deregister(&rfkill_miscdev);
class_unregister(&rfkill_class);
+ goto out;
+ }
#endif
out:
#ifdef CONFIG_RFKILL_INPUT
rfkill_handler_exit();
#endif
+ misc_deregister(&rfkill_miscdev);
class_unregister(&rfkill_class);
}
module_exit(rfkill_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff