X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Fuinput.h;h=7168302f98441ea9da3c42c931ea40a23bfec5b1;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=00bf0d29e360d82c798bbe75529ed0fcbf4c0d5a;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/linux/uinput.h b/include/linux/uinput.h
index 00bf0d29e..7168302f9 100644
--- a/include/linux/uinput.h
+++ b/include/linux/uinput.h
@@ -20,8 +20,11 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
- * 
+ *
  * Changes/Revisions:
+ *	0.2	16/10/2004 (Micah Dowty <micah@navi.cx>)
+ *		- added force feedback support
+ *             - added UI_SET_PHYS
  *	0.1	20/06/2002
  *		- first public version
  */
@@ -29,25 +32,56 @@
 #define UINPUT_MINOR		223
 #define UINPUT_NAME		"uinput"
 #define UINPUT_BUFFER_SIZE	16
+#define UINPUT_NUM_REQUESTS	16
+
+enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };
+
+struct uinput_request {
+	int			id;
+	int			code;	/* UI_FF_UPLOAD, UI_FF_ERASE */
 
-/* state flags => bit index for {set|clear|test}_bit ops */
-#define UIST_CREATED		0
+	int			retval;
+	struct completion	done;
+
+	union {
+		int		effect_id;
+		struct ff_effect* effect;
+	} u;
+};
 
 struct uinput_device {
 	struct input_dev	*dev;
-	unsigned long		state;
+	struct mutex		mutex;
+	enum uinput_state	state;
 	wait_queue_head_t	waitq;
-	unsigned char		ready,
-				head,
-				tail;
+	unsigned char		ready;
+	unsigned char		head;
+	unsigned char		tail;
 	struct input_event	buff[UINPUT_BUFFER_SIZE];
+
+	struct uinput_request	*requests[UINPUT_NUM_REQUESTS];
+	wait_queue_head_t	requests_waitq;
+	spinlock_t		requests_lock;
 };
 #endif	/* __KERNEL__ */
 
+struct uinput_ff_upload {
+	int			request_id;
+	int			retval;
+	struct ff_effect	effect;
+};
+
+struct uinput_ff_erase {
+	int			request_id;
+	int			retval;
+	int			effect_id;
+};
+
 /* ioctl */
 #define UINPUT_IOCTL_BASE	'U'
 #define UI_DEV_CREATE		_IO(UINPUT_IOCTL_BASE, 1)
 #define UI_DEV_DESTROY		_IO(UINPUT_IOCTL_BASE, 2)
+
 #define UI_SET_EVBIT		_IOW(UINPUT_IOCTL_BASE, 100, int)
 #define UI_SET_KEYBIT		_IOW(UINPUT_IOCTL_BASE, 101, int)
 #define UI_SET_RELBIT		_IOW(UINPUT_IOCTL_BASE, 102, int)
@@ -56,6 +90,64 @@ struct uinput_device {
 #define UI_SET_LEDBIT		_IOW(UINPUT_IOCTL_BASE, 105, int)
 #define UI_SET_SNDBIT		_IOW(UINPUT_IOCTL_BASE, 106, int)
 #define UI_SET_FFBIT		_IOW(UINPUT_IOCTL_BASE, 107, int)
+#define UI_SET_PHYS		_IOW(UINPUT_IOCTL_BASE, 108, char*)
+#define UI_SET_SWBIT		_IOW(UINPUT_IOCTL_BASE, 109, int)
+
+#define UI_BEGIN_FF_UPLOAD	_IOWR(UINPUT_IOCTL_BASE, 200, struct uinput_ff_upload)
+#define UI_END_FF_UPLOAD	_IOW(UINPUT_IOCTL_BASE, 201, struct uinput_ff_upload)
+#define UI_BEGIN_FF_ERASE	_IOWR(UINPUT_IOCTL_BASE, 202, struct uinput_ff_erase)
+#define UI_END_FF_ERASE		_IOW(UINPUT_IOCTL_BASE, 203, struct uinput_ff_erase)
+
+/* To write a force-feedback-capable driver, the upload_effect
+ * and erase_effect callbacks in input_dev must be implemented.
+ * The uinput driver will generate a fake input event when one of
+ * these callbacks are invoked. The userspace code then uses
+ * ioctls to retrieve additional parameters and send the return code.
+ * The callback blocks until this return code is sent.
+ *
+ * The described callback mechanism is only used if EV_FF is set.
+ * Otherwise, default implementations of upload_effect and erase_effect
+ * are used.
+ *
+ * To implement upload_effect():
+ *   1. Wait for an event with type==EV_UINPUT and code==UI_FF_UPLOAD.
+ *      A request ID will be given in 'value'.
+ *   2. Allocate a uinput_ff_upload struct, fill in request_id with
+ *      the 'value' from the EV_UINPUT event.
+ *   3. Issue a UI_BEGIN_FF_UPLOAD ioctl, giving it the
+ *      uinput_ff_upload struct. It will be filled in with the
+ *      ff_effect passed to upload_effect().
+ *   4. Perform the effect upload, and place the modified ff_effect
+ *      and a return code back into the uinput_ff_upload struct.
+ *   5. Issue a UI_END_FF_UPLOAD ioctl, also giving it the
+ *      uinput_ff_upload_effect struct. This will complete execution
+ *      of our upload_effect() handler.
+ *
+ * To implement erase_effect():
+ *   1. Wait for an event with type==EV_UINPUT and code==UI_FF_ERASE.
+ *      A request ID will be given in 'value'.
+ *   2. Allocate a uinput_ff_erase struct, fill in request_id with
+ *      the 'value' from the EV_UINPUT event.
+ *   3. Issue a UI_BEGIN_FF_ERASE ioctl, giving it the
+ *      uinput_ff_erase struct. It will be filled in with the
+ *      effect ID passed to erase_effect().
+ *   4. Perform the effect erasure, and place a return code back
+ *      into the uinput_ff_erase struct.
+ *      and a return code back into the uinput_ff_erase struct.
+ *   5. Issue a UI_END_FF_ERASE ioctl, also giving it the
+ *      uinput_ff_erase_effect struct. This will complete execution
+ *      of our erase_effect() handler.
+ */
+
+/* This is the new event type, used only by uinput.
+ * 'code' is UI_FF_UPLOAD or UI_FF_ERASE, and 'value'
+ * is the unique request ID. This number was picked
+ * arbitrarily, above EV_MAX (since the input system
+ * never sees it) but in the range of a 16-bit int.
+ */
+#define EV_UINPUT		0x0101
+#define UI_FF_UPLOAD		1
+#define UI_FF_ERASE		2
 
 #ifndef NBITS
 #define NBITS(x) ((((x)-1)/(sizeof(long)*8))+1)