/*
* Copyright (C) 2006 - 2007 Ivo van Doorn
* Copyright (C) 2007 Dmitry Torokhov
+ * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*/
#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/mutex.h>
-#include <linux/device.h>
-#include <linux/leds.h>
+
+/* define userspace visible states */
+#define RFKILL_STATE_SOFT_BLOCKED 0
+#define RFKILL_STATE_UNBLOCKED 1
+#define RFKILL_STATE_HARD_BLOCKED 2
/**
* enum rfkill_type - type of rfkill switch.
- * RFKILL_TYPE_WLAN: switch is on a 802.11 wireless network device.
- * RFKILL_TYPE_BLUETOOTH: switch is on a bluetooth device.
- * RFKILL_TYPE_UWB: switch is on a ultra wideband device.
- * RFKILL_TYPE_WIMAX: switch is on a WiMAX device.
- * RFKILL_TYPE_WWAN: switch is on a wireless WAN device.
+ *
+ * @RFKILL_TYPE_ALL: toggles all switches (userspace only)
+ * @RFKILL_TYPE_WLAN: switch is on a 802.11 wireless network device.
+ * @RFKILL_TYPE_BLUETOOTH: switch is on a bluetooth device.
+ * @RFKILL_TYPE_UWB: switch is on a ultra wideband device.
+ * @RFKILL_TYPE_WIMAX: switch is on a WiMAX device.
+ * @RFKILL_TYPE_WWAN: switch is on a wireless WAN device.
+ * @NUM_RFKILL_TYPES: number of defined rfkill types
*/
enum rfkill_type {
- RFKILL_TYPE_WLAN ,
+ RFKILL_TYPE_ALL = 0,
+ RFKILL_TYPE_WLAN,
RFKILL_TYPE_BLUETOOTH,
RFKILL_TYPE_UWB,
RFKILL_TYPE_WIMAX,
RFKILL_TYPE_WWAN,
- RFKILL_TYPE_MAX,
+ NUM_RFKILL_TYPES,
};
-enum rfkill_state {
- RFKILL_STATE_SOFT_BLOCKED = 0, /* Radio output blocked */
- RFKILL_STATE_UNBLOCKED = 1, /* Radio output allowed */
- RFKILL_STATE_HARD_BLOCKED = 2, /* Output blocked, non-overrideable */
- RFKILL_STATE_MAX, /* marker for last valid state */
+/**
+ * enum rfkill_operation - operation types
+ * @RFKILL_OP_ADD: a device was added
+ * @RFKILL_OP_DEL: a device was removed
+ * @RFKILL_OP_CHANGE: a device's state changed -- userspace changes one device
+ * @RFKILL_OP_CHANGE_ALL: userspace changes all devices (of a type, or all)
+ */
+enum rfkill_operation {
+ RFKILL_OP_ADD = 0,
+ RFKILL_OP_DEL,
+ RFKILL_OP_CHANGE,
+ RFKILL_OP_CHANGE_ALL,
};
-/*
- * These are DEPRECATED, drivers using them should be verified to
- * comply with the rfkill usage guidelines in Documentation/rfkill.txt
- * and then converted to use the new names for rfkill_state
- */
-#define RFKILL_STATE_OFF RFKILL_STATE_SOFT_BLOCKED
-#define RFKILL_STATE_ON RFKILL_STATE_UNBLOCKED
-
-/**
- * struct rfkill - rfkill control structure.
- * @name: Name of the switch.
- * @type: Radio type which the button controls, the value stored
- * here should be a value from enum rfkill_type.
- * @state: State of the switch, "UNBLOCKED" means radio can operate.
- * @user_claim_unsupported: Whether the hardware supports exclusive
- * RF-kill control by userspace. Set this before registering.
- * @user_claim: Set when the switch is controlled exlusively by userspace.
- * @mutex: Guards switch state transitions. It serializes callbacks
- * and also protects the state.
- * @data: Pointer to the RF button drivers private data which will be
- * passed along when toggling radio state.
- * @toggle_radio(): Mandatory handler to control state of the radio.
- * only RFKILL_STATE_SOFT_BLOCKED and RFKILL_STATE_UNBLOCKED are
- * valid parameters.
- * @get_state(): handler to read current radio state from hardware,
- * may be called from atomic context, should return 0 on success.
- * Either this handler OR judicious use of rfkill_force_state() is
- * MANDATORY for any driver capable of RFKILL_STATE_HARD_BLOCKED.
- * @led_trigger: A LED trigger for this button's LED.
- * @dev: Device structure integrating the switch into device tree.
- * @node: Used to place switch into list of all switches known to the
- * the system.
- *
- * This structure represents a RF switch located on a network device.
- */
-struct rfkill {
- const char *name;
- enum rfkill_type type;
-
- bool user_claim_unsupported;
- bool user_claim;
-
- /* the mutex serializes callbacks and also protects
- * the state */
- struct mutex mutex;
- enum rfkill_state state;
- void *data;
- int (*toggle_radio)(void *data, enum rfkill_state state);
- int (*get_state)(void *data, enum rfkill_state *state);
+/**
+ * struct rfkill_event - events for userspace on /dev/rfkill
+ * @idx: index of dev rfkill
+ * @type: type of the rfkill struct
+ * @op: operation code
+ * @hard: hard state (0/1)
+ * @soft: soft state (0/1)
+ *
+ * Structure used for userspace communication on /dev/rfkill,
+ * used for events from the kernel and control to the kernel.
+ */
+struct rfkill_event {
+ __u32 idx;
+ __u8 type;
+ __u8 op;
+ __u8 soft, hard;
+} __packed;
-#ifdef CONFIG_RFKILL_LEDS
- struct led_trigger led_trigger;
-#endif
+/* ioctl for turning off rfkill-input (if present) */
+#define RFKILL_IOC_MAGIC 'R'
+#define RFKILL_IOC_NOINPUT 1
+#define RFKILL_IOCTL_NOINPUT _IO(RFKILL_IOC_MAGIC, RFKILL_IOC_NOINPUT)
+
+/* and that's all userspace gets */
+#ifdef __KERNEL__
+/* don't allow anyone to use these in the kernel */
+enum rfkill_user_states {
+ RFKILL_USER_STATE_SOFT_BLOCKED = RFKILL_STATE_SOFT_BLOCKED,
+ RFKILL_USER_STATE_UNBLOCKED = RFKILL_STATE_UNBLOCKED,
+ RFKILL_USER_STATE_HARD_BLOCKED = RFKILL_STATE_HARD_BLOCKED,
+};
+#undef RFKILL_STATE_SOFT_BLOCKED
+#undef RFKILL_STATE_UNBLOCKED
+#undef RFKILL_STATE_HARD_BLOCKED
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/device.h>
+#include <linux/leds.h>
+#include <linux/err.h>
+
+/* this is opaque */
+struct rfkill;
- struct device dev;
- struct list_head node;
- enum rfkill_state state_for_resume;
+/**
+ * struct rfkill_ops - rfkill driver methods
+ *
+ * @poll: poll the rfkill block state(s) -- only assign this method
+ * when you need polling. When called, simply call one of the
+ * rfkill_set{,_hw,_sw}_state family of functions. If the hw
+ * is getting unblocked you need to take into account the return
+ * value of those functions to make sure the software block is
+ * properly used.
+ * @query: query the rfkill block state(s) and call exactly one of the
+ * rfkill_set{,_hw,_sw}_state family of functions. Assign this
+ * method if input events can cause hardware state changes to make
+ * the rfkill core query your driver before setting a requested
+ * block.
+ * @set_block: turn the transmitter on (blocked == false) or off
+ * (blocked == true) -- ignore and return 0 when hard blocked.
+ * This callback must be assigned.
+ */
+struct rfkill_ops {
+ void (*poll)(struct rfkill *rfkill, void *data);
+ void (*query)(struct rfkill *rfkill, void *data);
+ int (*set_block)(void *data, bool blocked);
};
-#define to_rfkill(d) container_of(d, struct rfkill, dev)
-struct rfkill * __must_check rfkill_allocate(struct device *parent,
- enum rfkill_type type);
-void rfkill_free(struct rfkill *rfkill);
+#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
+/**
+ * rfkill_alloc - allocate rfkill structure
+ * @name: name of the struct -- the string is not copied internally
+ * @parent: device that has rf switch on it
+ * @type: type of the switch (RFKILL_TYPE_*)
+ * @ops: rfkill methods
+ * @ops_data: data passed to each method
+ *
+ * This function should be called by the transmitter driver to allocate an
+ * rfkill structure. Returns %NULL on failure.
+ */
+struct rfkill * __must_check rfkill_alloc(const char *name,
+ struct device *parent,
+ const enum rfkill_type type,
+ const struct rfkill_ops *ops,
+ void *ops_data);
+
+/**
+ * rfkill_register - Register a rfkill structure.
+ * @rfkill: rfkill structure to be registered
+ *
+ * This function should be called by the transmitter driver to register
+ * the rfkill structure. Before calling this function the driver needs
+ * to be ready to service method calls from rfkill.
+ *
+ * If the software blocked state is not set before registration,
+ * set_block will be called to initialize it to a default value.
+ *
+ * If the hardware blocked state is not set before registration,
+ * it is assumed to be unblocked.
+ */
int __must_check rfkill_register(struct rfkill *rfkill);
+
+/**
+ * rfkill_pause_polling(struct rfkill *rfkill)
+ *
+ * Pause polling -- say transmitter is off for other reasons.
+ * NOTE: not necessary for suspend/resume -- in that case the
+ * core stops polling anyway
+ */
+void rfkill_pause_polling(struct rfkill *rfkill);
+
+/**
+ * rfkill_resume_polling(struct rfkill *rfkill)
+ *
+ * Pause polling -- say transmitter is off for other reasons.
+ * NOTE: not necessary for suspend/resume -- in that case the
+ * core stops polling anyway
+ */
+void rfkill_resume_polling(struct rfkill *rfkill);
+
+
+/**
+ * rfkill_unregister - Unregister a rfkill structure.
+ * @rfkill: rfkill structure to be unregistered
+ *
+ * This function should be called by the network driver during device
+ * teardown to destroy rfkill structure. Until it returns, the driver
+ * needs to be able to service method calls.
+ */
void rfkill_unregister(struct rfkill *rfkill);
-int rfkill_force_state(struct rfkill *rfkill, enum rfkill_state state);
-int rfkill_set_default(enum rfkill_type type, enum rfkill_state state);
+/**
+ * rfkill_destroy - free rfkill structure
+ * @rfkill: rfkill structure to be destroyed
+ *
+ * Destroys the rfkill structure.
+ */
+void rfkill_destroy(struct rfkill *rfkill);
+
+/**
+ * rfkill_set_hw_state - Set the internal rfkill hardware block state
+ * @rfkill: pointer to the rfkill class to modify.
+ * @state: the current hardware block state to set
+ *
+ * rfkill drivers that get events when the hard-blocked state changes
+ * use this function to notify the rfkill core (and through that also
+ * userspace) of the current state. They should also use this after
+ * resume if the state could have changed.
+ *
+ * You need not (but may) call this function if poll_state is assigned.
+ *
+ * This function can be called in any context, even from within rfkill
+ * callbacks.
+ *
+ * The function returns the combined block state (true if transmitter
+ * should be blocked) so that drivers need not keep track of the soft
+ * block state -- which they might not be able to.
+ */
+bool __must_check rfkill_set_hw_state(struct rfkill *rfkill, bool blocked);
+
+/**
+ * rfkill_set_sw_state - Set the internal rfkill software block state
+ * @rfkill: pointer to the rfkill class to modify.
+ * @state: the current software block state to set
+ *
+ * rfkill drivers that get events when the soft-blocked state changes
+ * (yes, some platforms directly act on input but allow changing again)
+ * use this function to notify the rfkill core (and through that also
+ * userspace) of the current state. It is not necessary to notify on
+ * resume; since hibernation can always change the soft-blocked state,
+ * the rfkill core will unconditionally restore the previous state.
+ *
+ * This function can be called in any context, even from within rfkill
+ * callbacks.
+ *
+ * The function returns the combined block state (true if transmitter
+ * should be blocked).
+ */
+bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked);
+
+/**
+ * rfkill_set_states - Set the internal rfkill block states
+ * @rfkill: pointer to the rfkill class to modify.
+ * @sw: the current software block state to set
+ * @hw: the current hardware block state to set
+ *
+ * This function can be called in any context, even from within rfkill
+ * callbacks.
+ */
+void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw);
/**
- * rfkill_state_complement - return complementar state
- * @state: state to return the complement of
+ * rfkill_blocked - query rfkill block
*
- * Returns RFKILL_STATE_SOFT_BLOCKED if @state is RFKILL_STATE_UNBLOCKED,
- * returns RFKILL_STATE_UNBLOCKED otherwise.
+ * @rfkill: rfkill struct to query
*/
-static inline enum rfkill_state rfkill_state_complement(enum rfkill_state state)
+bool rfkill_blocked(struct rfkill *rfkill);
+#else /* !RFKILL */
+static inline struct rfkill * __must_check
+rfkill_alloc(const char *name,
+ struct device *parent,
+ const enum rfkill_type type,
+ const struct rfkill_ops *ops,
+ void *ops_data)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static inline int __must_check rfkill_register(struct rfkill *rfkill)
+{
+ if (rfkill == ERR_PTR(-ENODEV))
+ return 0;
+ return -EINVAL;
+}
+
+static inline void rfkill_pause_polling(struct rfkill *rfkill)
+{
+}
+
+static inline void rfkill_resume_polling(struct rfkill *rfkill)
+{
+}
+
+static inline void rfkill_unregister(struct rfkill *rfkill)
+{
+}
+
+static inline void rfkill_destroy(struct rfkill *rfkill)
+{
+}
+
+static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
+{
+ return blocked;
+}
+
+static inline bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
{
- return (state == RFKILL_STATE_UNBLOCKED) ?
- RFKILL_STATE_SOFT_BLOCKED : RFKILL_STATE_UNBLOCKED;
+ return blocked;
}
+static inline void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
+{
+}
+
+static inline bool rfkill_blocked(struct rfkill *rfkill)
+{
+ return false;
+}
+#endif /* RFKILL || RFKILL_MODULE */
+
+
+#ifdef CONFIG_RFKILL_LEDS
/**
- * rfkill_get_led_name - Get the LED trigger name for the button's LED.
+ * rfkill_get_led_trigger_name - Get the LED trigger name for the button's LED.
* This function might return a NULL pointer if registering of the
- * LED trigger failed.
- * Use this as "default_trigger" for the LED.
+ * LED trigger failed. Use this as "default_trigger" for the LED.
*/
-static inline char *rfkill_get_led_name(struct rfkill *rfkill)
-{
-#ifdef CONFIG_RFKILL_LEDS
- return (char *)(rfkill->led_trigger.name);
+const char *rfkill_get_led_trigger_name(struct rfkill *rfkill);
+
+/**
+ * rfkill_set_led_trigger_name -- set the LED trigger name
+ * @rfkill: rfkill struct
+ * @name: LED trigger name
+ *
+ * This function sets the LED trigger name of the radio LED
+ * trigger that rfkill creates. It is optional, but if called
+ * must be called before rfkill_register() to be effective.
+ */
+void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name);
#else
+static inline const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
+{
return NULL;
-#endif
}
+static inline void
+rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
+{
+}
+#endif
+
+#endif /* __KERNEL__ */
+
#endif /* RFKILL_H */
git.openpandora.org / pandora-kernel.git / blobdiff