[RFC 0/3] rfkill

[RFC 0/3] rfkill

[Ivo van Doorn]

Hi Dmitry,

I have a few rfkill related patches for which I would prefer if you to could 
take a look at before I send them for inclusion.

Thanks. :)

Ivo

[RFC 1/3] rfkill: Remove IRDA

[Ivo van Doorn]

As Dmitry pointed out earlier, rfkill-input.c
doesn't support irda because there are no users
and we shouldn't add unrequired KEY_ defines.

However, RFKILL_TYPE_IRDA was defined in the
rfkill.h header file and would confuse people
about whether it is implemented or not.

This patch removes IRDA support completely,
so it can be added whenever a driver wants the
feature.

Signed-off-by: Ivo van Doorn <IvDoorn-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 include/linux/rfkill.h |    8 +++-----
 net/rfkill/Kconfig     |    2 +-
 net/rfkill/rfkill.c    |    5 +----
 3 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index a8a6ea8..c4546e1 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -31,13 +31,11 @@
  * enum rfkill_type - type of rfkill switch.
  * RFKILL_TYPE_WLAN: switch is no a Wireless network devices.
  * RFKILL_TYPE_BlUETOOTH: switch is on a bluetooth device.
- * RFKILL_TYPE_IRDA: switch is on an infrared devices.
  */
 enum rfkill_type {
-	RFKILL_TYPE_WLAN = 0,
-	RFKILL_TYPE_BLUETOOTH = 1,
-	RFKILL_TYPE_IRDA = 2,
-	RFKILL_TYPE_MAX = 3,
+	RFKILL_TYPE_WLAN ,
+	RFKILL_TYPE_BLUETOOTH,
+	RFKILL_TYPE_MAX,
 };
 
 enum rfkill_state {
diff --git a/net/rfkill/Kconfig b/net/rfkill/Kconfig
index 8b31759..d28a6d9 100644
--- a/net/rfkill/Kconfig
+++ b/net/rfkill/Kconfig
@@ -5,7 +5,7 @@ menuconfig RFKILL
 	tristate "RF switch subsystem support"
 	help
 	  Say Y here if you want to have control over RF switches
-	  found on many WiFi, Bluetooth and IRDA cards.
+	  found on many WiFi and Bluetooth cards.
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called rfkill.
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index db3395b..50e0102 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -106,9 +106,6 @@ static ssize_t rfkill_type_show(struct device *dev,
 	case RFKILL_TYPE_BLUETOOTH:
 		type = "bluetooth";
 		break;
-	case RFKILL_TYPE_IRDA:
-		type = "irda";
-		break;
 	default:
 		BUG();
 	}
@@ -281,7 +278,7 @@ static void rfkill_remove_switch(struct rfkill *rfkill)
 /**
  * rfkill_allocate - allocate memory for rfkill structure.
  * @parent: device that has rf switch on it
- * @type: type of the switch (wlan, bluetooth, irda)
+ * @type: type of the switch (RFKILL_TYPE_*)
  *
  * This function should be called by the network driver when it needs
  * rfkill structure. Once the structure is allocated the driver shoud
-- 
1.5.3

[RFC 2/3] rfkill: Add support for ultrawideband

[Ivo van Doorn]

This patch will add support for UWB keys to rfkill,
support for this has been requested by Inaky.

Signed-off-by: Ivo van Doorn <IvDoorn-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
CC: Inaky Perez-Gonzalez <inaky-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
 include/linux/input.h     |    1 +
 include/linux/rfkill.h    |    2 ++
 net/rfkill/rfkill-input.c |    9 +++++++++
 net/rfkill/rfkill.c       |    3 +++
 4 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/include/linux/input.h b/include/linux/input.h
index cf2b561..8e5828d 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -360,6 +360,7 @@ struct input_absinfo {
 
 #define KEY_BLUETOOTH		237
 #define KEY_WLAN		238
+#define KEY_UWB			239
 
 #define KEY_UNKNOWN		240
 
diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index c4546e1..f9a50da 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -31,10 +31,12 @@
  * enum rfkill_type - type of rfkill switch.
  * RFKILL_TYPE_WLAN: switch is no a Wireless network devices.
  * RFKILL_TYPE_BlUETOOTH: switch is on a bluetooth device.
+ * RFKILL_TYPE_UWB: switch is on a Ultra wideband device.
  */
 enum rfkill_type {
 	RFKILL_TYPE_WLAN ,
 	RFKILL_TYPE_BLUETOOTH,
+	RFKILL_TYPE_UWB,
 	RFKILL_TYPE_MAX,
 };
 
diff --git a/net/rfkill/rfkill-input.c b/net/rfkill/rfkill-input.c
index 9f746be..8e4516a 100644
--- a/net/rfkill/rfkill-input.c
+++ b/net/rfkill/rfkill-input.c
@@ -81,6 +81,7 @@ static void rfkill_schedule_toggle(struct rfkill_task *task)
 
 static DEFINE_RFKILL_TASK(rfkill_wlan, RFKILL_TYPE_WLAN);
 static DEFINE_RFKILL_TASK(rfkill_bt, RFKILL_TYPE_BLUETOOTH);
+static DEFINE_RFKILL_TASK(rfkill_uwb, RFKILL_TYPE_UWB);
 
 static void rfkill_event(struct input_handle *handle, unsigned int type,
 			unsigned int code, int down)
@@ -93,6 +94,9 @@ static void rfkill_event(struct input_handle *handle, unsigned int type,
 		case KEY_BLUETOOTH:
 			rfkill_schedule_toggle(&rfkill_bt);
 			break;
+		case KEY_UWB:
+			rfkill_schedule_toggle(&rfkill_uwb);
+			break;
 		default:
 			break;
 		}
@@ -148,6 +152,11 @@ static const struct input_device_id rfkill_ids[] = {
 		.evbit = { BIT(EV_KEY) },
 		.keybit = { [LONG(KEY_BLUETOOTH)] = BIT(KEY_BLUETOOTH) },
 	},
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT | INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT(EV_KEY) },
+		.keybit = { [LONG(KEY_UWB)] = BIT(KEY_UWB) },
+	},
 	{ }
 };
 
diff --git a/net/rfkill/rfkill.c b/net/rfkill/rfkill.c
index 50e0102..03ed7fd 100644
--- a/net/rfkill/rfkill.c
+++ b/net/rfkill/rfkill.c
@@ -106,6 +106,9 @@ static ssize_t rfkill_type_show(struct device *dev,
 	case RFKILL_TYPE_BLUETOOTH:
 		type = "bluetooth";
 		break;
+	case RFKILL_TYPE_UWB:
+		type = "ultrawideband";
+		break;
 	default:
 		BUG();
 	}
-- 
1.5.3

Re: [RFC 2/3] rfkill: Add support for ultrawideband

[Inaky Perez-Gonzalez]

On Saturday 08 September 2007, Ivo van Doorn wrote:
> This patch will add support for UWB keys to rfkill,
> support for this has been requested by Inaky.
> 
> Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
> CC: Inaky Perez-Gonzalez <inaky@linux.intel.com>

Thanks so much

Acked-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

[RFC 3/3] rfkill: Add rfkill documentation

[Ivo van Doorn]

Add a documentation file which contains
a short description about rfkill with some
notes about drivers and the userspace interface.

Signed-off-by: Ivo van Doorn <IvDoorn-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 Documentation/rfkill.txt |   88 ++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 88 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/rfkill.txt

diff --git a/Documentation/rfkill.txt b/Documentation/rfkill.txt
new file mode 100644
index 0000000..93c76fc
--- /dev/null
+++ b/Documentation/rfkill.txt
@@ -0,0 +1,88 @@
+rfkill - RF switch subsystem support
+====================================
+
+1 Implementation details
+2 Driver support
+3 Userspace support
+
+===============================================================================
+1: Implementation details
+
+The rfkill switch subsystem offers support for keys often found on laptops
+to enable wireless devices like WiFi and Bluetooth.
+
+This is done by providing the user 3 possibilities:
+ - The rfkill system handles all events, userspace is not aware of events.
+ - The rfkill system handles all events, userspace is informed about the event.
+ - The rfkill system does not handle events, userspace handles all events.
+
+The buttons to enable and disable the wireless radios are important in
+situations where the user is for example using his laptop on a location where
+wireless radios _must_ be disabled (e.g airplanes).
+Because of this requirement, userspace support for the keys should not be
+made mandatory. Because userspace might want to perform some additional smarter
+tasks when the key is pressed, rfkill still provides userspace the possibility
+to take over the task to handle the key events.
+
+The system inside the kernel has been split into 2 seperate sections:
+	1 - RFKILL
+	2 - RFKILL_INPUT
+
+The first option enables rfkill support and will make sure userspace will
+be notified of any events through the input device. It also creates several
+sysfs entries which can be used by userspace. See section "Userspace support".
+
+The second option provides a rfkill input handler. This handler will
+listen to all rfkill key events and will toggle the radio accordingly,
+with this option enabled userspace could either do nothing or simply
+perform monitoring tasks.
+
+====================================
+2: Driver support
+
+Drivers who wish to build in rfkill subsystem support should
+make sure their driver depends of the Kconfig option RFKILL, it should
+_not_ depend on RFKILL_INPUT.
+
+Unless key events trigger a interrupt to which the driver listens, polling
+will be required to determine the key state changes. For this the input
+layer providers the input-polldev handler.
+
+A driver should implement a few steps to correctly make use of the
+rfkill subsystem. First for non-polling drivers:
+
+	- rfkill_allocate()
+	- input_allocate_device()
+	- rfkill_register()
+	- input_register_device()
+
+For polling drivers:
+
+	- rfkill_allocate()
+	- input_allocate_polled_device()
+	- rfkill_register()
+	- input_register_polled_device()
+
+When a key event has been detected, the correct event should be
+send over the input device which has been registered by the driver.
+
+====================================
+3: Userspace support
+
+For each key a input device will be created which will send out the correct
+key event when the rfkill key has been pressed.
+
+The following sysfs entries will be created:
+
+	name: Name assigned by driver to this key (interface or driver name).
+	type: Name of the key type ("wlan", "bluetooth", etc).
+	state: Current state of the key. 1: On, 0: Off.
+	claim: 1: Userspace handles events, 0: Kernel handles events
+
+Both the "state" and "claim" entries are also writable. For the "state" entry
+this means that when 1 or 0 is written all radios will be toggled accordingly.
+For the "claim" entry writing 1 to it will mean that the kernel will no longer
+handle key events even though RFKILL_INPUT input was enabled. When "claim" has
+been set to 0, userspace should make sure it will listen for the input events
+or check the sysfs "state" entry regularly to correctly perform the required
+tasks when the rkfill key is pressed.
-- 
1.5.3

Re: [RFC 0/3] rfkill

[Dmitry Torokhov]

Hi Ivo,

On Saturday 08 September 2007 11:10, Ivo van Doorn wrote:
> Hi Dmitry,
> 
> I have a few rfkill related patches for which I would prefer if you to could 
> take a look at before I send them for inclusion.
> 

Looks good, feel free to add

	Acked-by: Dmitry Torokhov <dtor@mail.ru>

Thanks!

-- 
Dmitry

Re: [RFC 0/3] rfkill

[David Miller]

From: Dmitry Torokhov <dtor-xOqKmqBdiMhF6kxbq+BtvQ@public.gmane.org>
Date: Mon, 10 Sep 2007 00:04:55 -0400

> Looks good, feel free to add
> 
> 	Acked-by: Dmitry Torokhov <dtor-JGs/UdohzUI@public.gmane.org>

I've been loosely following these patches, they have
gone through several revisions.

Please resubmit all of these patches if they are ready
to go in right now, thanks.